戻る
「早戻しボタン」を押すと検索画面に戻ります。

今後説明を表示しない

[OK]

コーパス検索結果 (1語後でソート)

通し番号をクリックするとPubMedの該当ページを表示します
1 se it generates extremely reactive methylene carbene.
2  the electronic and steric properties of the carbene.
3 ction of benzene and favors formation of the carbene.
4 triplet gap rather than on the nature of the carbene.
5 ss is triggered by lateral metalation of the carbene.
6 te-assisted formation of aryl-Co(III) masked-carbenes.
7 nciple to control the spin state of reactive carbenes.
8 cial metalloenzymes employing iron porphyrin carbenes.
9 s within a range dominated by N-heterocyclic carbenes.
10 to that observed in classical N-heterocyclic carbenes.
11 bilized via strong sigma-donation of singlet carbenes.
12 ith the nucleophilicity of the corresponding carbenes.
13 eAl double bond stabilized by N-heterocyclic carbenes.
14 forms covalent complexes with N-heterocyclic carbenes.
15                         The initially formed carbene 22 is estimated to carry chemical activation of
16 hyl)isoquinoline 19 and 1-isoquinolyl-((13)C-carbene) 22, which undergoes carbene-nitrene rearrangeme
17              Once formed, the iron porphyrin carbene accomplishes N-H insertion via nucleophilic atta
18  diaminocarbenes with aroylimines, where the carbene acted as an oxygen-abstracting agent.
19 nalogy with the Skell hypothesis for singlet carbene addition to olefins.
20 y-entropy compensation is operative in these carbene additions.
21 )phosphinidene-isonitrile (>P-P<--:CNR) and -carbene adducts (>P-P<--:C<).
22 peak, conducted to electrogenerated phenacyl carbenes after halide evolution on the first obtained br
23 or 15 enol-ketone pairs derived from various carbenes/aldehydes.
24 rrhenius behavior is proposed to result from carbene-alkene additions taking place intrinsically or e
25 olysis is carried out in cyclohexene but the carbene-alkene cycloadduct could be detected, albeit in
26 noids, carbenic philicity, absolute rates of carbene/alkene additions, the diazirine exchange reactio
27                    With the exception of two carbene/alkene combinations, Arrhenius correlations of l
28 s that proceed through dinitrogen extrusion, carbene/alkyne metathesis, and aromatic substitution to
29  the nature and electronic structure of gold carbene/alpha-metallocarbenium complexes and the cationi
30  until recently no examples of cationic gold carbenes/alpha-metallocarbenium ions had been synthesize
31             In contrast, the deuterated (OD) carbene analogue showed much reduced 1,2-D-shift reactiv
32  can be used also for the synthesis of other carbene analogues such as germylenes and phosphinidenes.
33 omologues uniformly electronic structures of carbene analogues that are stabilized by homoconjugation
34 er, shorter, and more polar bond between the carbene and CO2.
35 e the hot reactivity of a metastable Co(III)-carbene and elicit C-C coupling products in a productive
36 e corresponding phosphaketene, phosphinidene-carbene and phosphinidene-phosphine adducts, respectivel
37                      p-Tolyl(trifluoromethyl)carbene and the related fluorenyl(trifluoromethyl)carben
38  hydrogen-bonded complex between the singlet carbene and water.
39 ples of tricarbontriphosphide coordinated by carbenes and are likely formed via trimerization of the
40 ecifically the physical organic chemistry of carbenes and carbocations.
41 boraanthracene) stabilized by N-heterocyclic carbenes and its one- and two-electron oxidized congener
42 ns to the surging interest in iron porphyrin carbenes and their synthetic potential.
43 seen original class of stable N-heterocyclic carbenes and, more generally, the potential of electron-
44 ted by an NHC-Cu complex (NHC=N-heterocyclic carbene) and products obtained in 63-95 % yield, 88:12 t
45 zed borylenes are isoelectronic with singlet carbenes, and their reactivity mimics to some extent tha
46 ons, the singlet and triplet states of these carbenes are energetically nearly degenerate in the gas
47 a chiral sulfonate-containing N-heterocyclic carbene, are broadly applicable.
48 l substrates, simply by using N-heterocyclic carbene as ligand, leading to branched products with up
49 ay for the further development of persistent carbenes as universal ligands for silicon and potentiall
50 articular, the development of N-heterocyclic carbene-based emitters and tetradentate cyclometalated P
51  a photochemical reaction that is typical of carbenes bearing a methyl substituent.
52 synthesis of storable bicyclic (alkyl)(amino)carbenes (BICAACs), which feature enhanced sigma-donatin
53                     Synthetic application of carbenes, biradicals/radical pairs and carbocations have
54                   The existence of the metal-carbene bond could be proven by (13)C-SS-NMR experiments
55 ling the magnetic and chemical properties of carbenes by using light of different wavelengths might b
56 ron carbenes, distinct from other late metal carbenes, C-H cleavage is partially rate-determining and
57  (1; Dipp=2,6-(i) Pr2 C6 H4 ; N-heterocyclic carbene=C[((i) Pr)NC(Me)]2 ) with N2 O furnishes the fir
58  C6 H4 ) and two NHC ligands (N-heterocyclic carbene=:C[(Pr(i) )NC(Me)]2 ) was synthesized in high yi
59  ones, in particular, a cyclic (alkyl)(amino)carbene (CAAC) and an acyclic diaminocarbene (ADAC), are
60 rocyclic carbene (NHC)-cyclic (alkyl)(amino) carbene (CAAC) heterodimers is presented.
61                          Cyclic aklyl(amino) carbene (cAAC) is regarded as a stronger sigma-donor and
62 athesis catalysts bearing cyclic alkyl amino carbene (CAAC) ligands was prepared.
63                        A cyclic alkyl(amino) carbene (cAAC) stabilized dimer [(cAAC)Si(P-Tip)]2 (2) (
64                      The cyclic alkyl(amino) carbene (cAAC) stabilized monoanionic phosphorus atom in
65 e 2 was converted to a cyclic (alkyl) (amino)carbene (cAAC) via 1,2-hydrogen migration triggered by b
66    The reaction of the cyclic (alkyl)(amino) carbene [cAACMe ] (cAACMe =:C(CMe2 )2 (CH2 )NAr, Ar=2,6-
67 nium salts derived from cyclic (alkyl)(amino)carbenes (CAACs) affords propargyl/allenyl radicals.
68     Discovered in 2005, cyclic (alkyl)(amino)carbenes (CAACs) are among the most nucleophilic (sigma
69 le hemilabile bidentate cyclic (alkyl)(amino)carbenes (CAACs) featuring alkene, ether, amine, imine,
70 nd states stabilized by cyclic (alkyl)(amino)carbenes (CAACs).
71 perties compared to monocyclic (alkyl)(amino)carbenes (CAACs).
72 taining predominantly the triplet or singlet carbene can be generated.
73                                          The carbenes can be generated in both their triplet and sing
74  the diazirine exchange reaction and derived carbenes, carbene equilibria, carbocations from diazotat
75 up to generate stable radical centers on the carbene carbon atoms by employing the so far hidden and
76 d carbonyl ylides formed from intramolecular carbene-carbonyl cyclization in one pot with one catalys
77 ramatically expands the synthetic utility of carbene catalysis by leveraging additional activation mo
78  the presence of alcohols and N-heterocyclic carbene catalysts, e.g., benzimidazolylidenes or triazol
79 MeO/H) (R = MeO, Cl; x = 2, 3), and two free carbenes (catalysts), (OMe2)TPT and (OMe3)TPT, have been
80    Mechanistic aspects of the N-heterocyclic carbenes catalyzed aerobic oxidation of aldehydes shares
81 ulated in 1958, are pivotal intermediates in carbene-catalyzed umpolung.
82 Br, respectively, are transferred to the DPC carbene center and radical pairs are formed.
83 ole of the acceptor substituent flanking the carbene center being the major selectivity determining f
84 on center in PhBCO is isoelectronic with the carbene center in PhCH.
85  skeleton, the steric environment around the carbene center is different from that of CAACs and simil
86 substituents on the heteroatoms flanking the carbene center, as well as inductive electronic effects
87  atom stabilized by binding with the partial carbene-character C atom.
88 s tremendous preparative importance, rhodium carbene chemistry has been studied extensively during pa
89 ngs, which demonstrates the power of rhodium carbene chemistry in organic chemical synthesis.
90                          The formally Co(IV) carbene Co(OR)2( horizontal lineCPh2) is formed upon the
91 s at -30 degrees C reveal that 6 forms via a carbene complex (1d) that isomerizes to aminomethyl comp
92 the corresponding Fe(CO)4-modified disilicon carbene complex L:Si horizontal lineSi[Fe(CO)4]:L (6) wi
93 ting and results in an intermediate carbonyl carbene complex.
94 d-shifted component characteristic of a P450-carbene complex.
95 philic attacks to different positions of the carbene complex.
96 ting the substituents present in the initial carbene complex.
97 y determined by the Grubbs second-generation carbene complex: Ru1 was found to promote ene-yne metath
98  1b; RR' = Et2, 1c) react with XylNC to form carbene complexes [PhBP3]Ru(H) horizontal line[C(H)(N(Xy
99               Although the existence of gold carbene complexes as intermediates in gold-catalyzed tra
100                   Halo-substituted ruthenium carbene complexes decompose rapidly or deliver low activ
101 ately seven years, a number of cationic gold carbene complexes have been synthesized in solution and
102 n non-heteroatom-stabilized alkynyl chromium carbene complexes prepared in situ and furfural imines t
103  tetravalent cerium, uranium and thorium bis(carbene) complexes with trans C=M=C cores where experime
104  [2,4,6-trimethylphenyl] substitution on the carbene component.
105                               Iron porphyrin carbenes constitute a new frontier of species with consi
106 .g. as accomplished for cyclopentadienyl and carbene derivatives) and a rewarding collaboration betwe
107  participate in rapid migratory insertion of carbenes derived from silyl- or carbonyl-stabilized diaz
108 bearing 2,2'-bipyridyl, 1,10-phenanthroline, carbene, dipyridylamine, pyridyl-benzimidazole, pyridyl-
109 s via a NHC-stabilized (NHC = N-heterocyclic carbene) disilahydronium ion ("pi-bonded" isomer) and is
110          These studies suggest that for iron carbenes, distinct from other late metal carbenes, C-H c
111                                  As the free carbenes do not react together in solution, the syntheti
112  which the functionality associated with the carbene donor is of the oxygen-donor type.
113 for exploiting gaseous and/or hard-to-handle carbene donor reagents in biocatalytic carbene transfer
114 diazo-1,1,1-trifluoroethane (CF3CHN2) as the carbene donor.
115 rine exchange reaction and derived carbenes, carbene equilibria, carbocations from diazotates, and ca
116 -H insertion reactivity of an iron porphyrin carbene, [Fe(Por)(SCH3)(CHCO2Et)](-), a model of a compl
117 e, first by formation of cyclopropyl gold(I) carbenes, followed by a ring expansion.
118  much improved properties of this probe make carbene footprinting a viable method for rapid and accur
119                              In this study a carbene-footprinting approach was developed and applied
120                                          The carbene forms by dinitrogen loss from ethyl diazoacetate
121                                          The carbene forms can be easily trapped by the reaction of s
122 Pd-N and capital ES, Cyrillic-N bonds in the carbene fragment XylNCN(R)Xyl.
123 taining pure triplet p-tolyl(trifluoromethyl)carbene from 3 to 25 K leads to an interconversion of up
124         A method based on in situ alkylidene carbene generation-C-H insertion reaction of 5-(3-oxobut
125                        Studies on alkylidene carbene generation-C-H insertion reaction of the lactam
126 reaction conditions for effecting alkylidene carbene generation-C-H insertion.
127 he latter react with isonitriles and singlet carbenes giving (phosphino)phosphinidene-isonitrile (>P-
128              We discuss the chemistry of the carbene-gold bond and report on advantages of this new l
129 ormed of rings of 10 carbon atoms bridged by carbene groups yielding seven-membered rings.
130                    The stability of the free carbenes has been exploited for the synthesis of copper(
131 on of versatile pyridinium ylides from metal carbenes has been poorly developed; the broad utility de
132 (CAAC)B(CO)Ar] (CAAC = cyclic (alkyl) (amino)carbene), has been prepared using a transfer reaction fr
133                                         Iron carbenes have been inert, or shown to favor olefin cyclo
134              In recent years, triazolylidene carbenes have come to the forefront as important organoc
135 (MICs) have emerged as an important class of carbene, however they are found in the free form or liga
136        The reaction of 1 with N-heterocyclic carbene IMes afforded 3-(IMes)C14H7O2B(C6F5)2 (11) and [
137  reacts with carbon monoxide, stable singlet carbenes, including the poor pi-accepting imidazol-2-yli
138 oup) secondary C-H bonds by means of rhodium-carbene-induced C-H insertion.
139 nalization of C-H bonds to form C-C bonds by carbene insertion and add carbenes to both beta-substitu
140 tions, namely a diastereoselective dirhodium carbene insertion followed by an ester-directed oxidativ
141                          This chemoselective carbene insertion into -NH bond over -COOH and -OH bonds
142 ence of borane-Lewis base complexes, through carbene insertion into boron-hydrogen bonds.
143 compounds under physiological conditions via carbene insertion into silicon-hydrogen bonds.
144 ve been achieved via phosphonate substituted carbene insertion into the N-H bond of aniline catalyzed
145   In order to find an efficient catalyst for carbene insertion reaction in neat water, a large number
146 que example of a net (formal) intramolecular carbene insertion reaction into a vinylic C(sp(2))-H bon
147 nto unactivated C-H bonds and intermolecular carbene insertions into C-H bonds.
148        This activity leads to intramolecular carbene insertions into unactivated C-H bonds and interm
149 yclopropanation by a reactive alpha-oxo gold carbene intermediate generated in situ.
150 (3))-H bond to a C(sp(3))-C bond via an iron carbene intermediate represents a long-standing challeng
151 tation into a highly reactive alpha-oxo gold carbene intermediate.
152 (sp(3))-H alkylations via isoelectronic iron carbene intermediates have thus far been unsuccessful.
153 pplication of steady-state conditions to the carbene intermediates provided a rate treatment that fit
154 tion, consistent with rapid decomposition of carbene intermediates under ene-yne conditions.
155 or amino acids is caused by stabilization of carbene intermediates via the carbonyl group.
156 carbene, due to competitive insertion of the carbene into the N-N bond.
157 dium in place of iron catalyze insertions of carbenes into C-H bonds with up to 98% enantiomeric exce
158                 The selectivity of the title carbene is compared with that of spiro[2.3]hex-4-ylidene
159                                          The carbene is investigated in argon matrices by IR, UV-vis,
160                              The dual-ringed carbene is predicted to assume four distinct geometric c
161                          Bis(p-methoxyphenyl)carbene is the first carbene that at cryogenic temperatu
162   An alternative way to generate the singlet carbene is the reaction of the triplet with water molecu
163  of a silicon(I) radical with N-heterocyclic carbenes is described.
164 uding diazoalkane derivatives and alkylidene carbenes, it is possible to induce novel Grob-type C-C f
165 and also electrophilic (pi-accepting) stable carbenes known to date.
166 particular the relative contributions of the carbene (LAu(+)[double bond, length as m-dash]CR2) and a
167 of a rhodium pre-catalyst, an N-heterocyclic carbene ligand and an amino-pyridine co-catalyst.
168               Addition of the N-heterocyclic carbene ligand IMes to fac,anti-(ONO(Cat))Re(O)(mu-O)2Re
169 roducts result from insertion of a palladium-carbene ligand into the N-H bond of the aromatic N-heter
170              Subsequent rearrangement of the carbene ligand is rate limiting for electron poor and st
171 ed electrons residing on the iron center and carbene ligand.
172 (I) atom of 2 into the Cphenyl-N bond of the carbene ligand.
173 cursor supported by a monoanionic pincer bis(carbene) ligand, (Mes)CCC ((Mes)CCC = bis(mesityl-benzim
174 sed cobalt pre-catalysts with N-heterocyclic carbene ligands catalyze the Suzuki cross-coupling of ar
175 ection for 'Privileged chiral N-heterocyclic carbene ligands for asymmetric transition-metal catalysi
176 ridine or benzoquinoline) and N-heterocyclic carbene ligands possess intriguing structures, topologie
177 tiple bond to give, after rearrangement, the carbene-ligated Al(III) amide, NacNac'Al(NHTol)(SIMe) (6
178 sized from the combination of N-heterocyclic carbene-ligated gold(I) trimethylsilylchalcogenolates [(
179 on, the first examples of the gold mesoionic carbene mediated [2+2+2] cycloaddition of these enynes w
180 vel Grob-type C-C fragmentations, alkylidene carbene mediated Li-N insertions, and dipolar cycloaddit
181               This work expands the range of carbene-mediated transformations accessible via metallop
182 tigations support that an electrophilic iron carbene mediates homolytic C-H cleavage and rebounds fro
183 polymerization (ROMP) with cyclometalated Ru-carbene metathesis catalysts were investigated.
184                            Neutral mesoionic carbenes (MICs) have emerged as an important class of ca
185 carbazole framework flanked by two mesoionic carbenes (MICs).
186 neous gold-catalyzed processes incorporating carbene migratory insertion steps.
187 lineP bond, while the LUMO is located at the carbene moiety (cAAC or NHC).
188 cter with non-negligible spin density on the carbene moiety.
189 in the chemical conversion of N-heterocyclic carbene molecules attached to catalytic particles is map
190 ve groups in surface-anchored N-heterocyclic carbene molecules.
191 to amine products form via an intramolecular carbene N-H insertion, and the imidazopyrrolopyrazines f
192 opyrrolopyrazines form via an intermolecular carbene N-H insertion.
193 eveal that a 1,2-phenyl shift in the singlet carbene needs to overcome a barrier of only 3.8 kcal/mol
194 mediated radical reactions of N-heterocyclic carbene (NHC) boranes.
195                               N-Heterocyclic carbene (NHC) catalysis has emerged as a powerful strata
196 als was realized using chiral N-heterocyclic carbene (NHC) catalysts.
197                         Three N-heterocyclic carbene (NHC) catalyzed kinetic resolutions (KR) and one
198 ediated metalation (AMMM) and N-heterocyclic carbene (NHC) chemistry, a novel C-N bond activation and
199 15 years the success story of N-heterocyclic carbene (NHC) compounds in organic, inorganic, and organ
200 gy-based index of the ease of N-heterocyclic carbene (NHC) formation either by deprotonation of precu
201 nyl)phenyl) stabilized by the N-heterocyclic carbene (NHC) ImMe4 is reported.
202            Here, we show that N-heterocyclic carbene (NHC) Ir(III) complexes can serve as both deep b
203   The use of an electron-rich N-heterocycilc carbene (NHC) ligand is effective to inhibit undesired b
204            Dissymmetry at the N-heterocyclic carbene (NHC) ligand was identified as a key parameter f
205    It is well-recognized that N-heterocyclic carbene (NHC) ligands have provided a new dimension to t
206 ontal Be-Be axis supported by N-heterocyclic carbene (NHC) ligands.
207 ion between N-aryl triazolium N-heterocyclic carbene (NHC) precatalysts and substituted benzaldehyde
208 turated 2,6-diisopropylphenyl N-heterocyclic carbene (NHC) precursors with excellent selectivity (up
209            A fused pi-helical N-heterocyclic carbene (NHC) system was prepared and examined through i
210 nk the dicarbollide ion to an N-heterocyclic carbene (NHC) to form an isolable N-dicarbollide-substit
211                               N-Heterocyclic carbene (NHC)-catalyzed intramolecular aldol lactonizati
212 ional investigations into the N-heterocyclic carbene (NHC)-catalyzed proton-transfer polymerization (
213 mide and ester equivalents in N-heterocyclic carbene (NHC)-catalyzed redox hetero-Diels-Alder reactio
214              The synthesis of N-heterocyclic carbene (NHC)-cyclic (alkyl)(amino) carbene (CAAC) heter
215 and characterization of novel N-heterocyclic carbene (NHC)-gold(I) complexes and their bioconjugation
216                 We report the N-heterocyclic carbene (NHC)-induced activation of an otherwise unreact
217 ensive characterization of an N-heterocyclic carbene (NHC)-modified supported heterogeneous catalyst.
218 when compared with that of an N-heterocyclic carbene (NHC).
219  = 1,5-cyclooctadiene) and an N-heterocyclic carbene (NHC).
220                               N-Heterocyclic carbenes (NHC's) are known to serve as efficient substra
221 e of organocatalysts, such as N-heterocyclic carbenes (NHCs) and N-heterocyclic olefins (NHOs) as wel
222        The success of achiral N-heterocyclic carbenes (NHCs) as stable electron-rich neutral ligands
223 e of formation of (i) neutral N-heterocyclic carbenes (NHCs) by deprotonation of heterocyclic salts a
224 and stabilized by two capping N-heterocyclic carbenes (NHCs) has been prepared.
225 ganic films on gold employing N-heterocyclic carbenes (NHCs) has been previously shown to be a useful
226 unctional theory computations.N-heterocyclic carbenes (NHCs) have been applied as ancillary ligands i
227 eterocyclic phosphenium) with N-heterocyclic carbenes (NHCs) leads to phosphaheteroallenes (NHP)-O-P=
228 M{N(SiMe3 )2 }2 ] (M=Fe, Co), N-heterocyclic carbenes (NHCs) react with primary phosphines to give a
229 nt in functionalizing gold by N-heterocyclic carbenes (NHCs), a promising alternative ligand class re
230 ifferent donor groups, and of N-heterocyclic carbenes (NHCs).
231 clic amido-chlorosilylene bis(N-heterocyclic carbene) Ni(0) complex [{N(Dipp)(SiMe3 )ClSi:-->Ni(NHC)2
232 quinolyl-((13)C-carbene) 22, which undergoes carbene-nitrene rearrangement to 2-naphthylnitrene 23.
233 tom transfer, and transition-metal-catalyzed carbene/nitrene transfer, for the directed functionaliza
234                                              Carbenes of platinum and palladium, PtC3 and PdC3 , were
235 or to the class of mononuclear half-sandwich carbenes of Rh(III), which show considerable potential.
236  and a2); and path b via ring closure of the carbene onto the ring nitrogen, yielding 1-aza-benzo[d]b
237 nt carbon atom, typically formulated as gold carbenes or alpha-metallocarbenium ions, have been widel
238  with primary phosphines to give a series of carbene phosphinidenes of the type (NHC)PAr.
239      The fact that diazo compounds and other carbene precursors are known mechanism-based inhibitors
240                        Here, the imidazolium-carbenes preferentially react with the disulfide bond, b
241 ds indicate that ring-contraction within the carbene prevails over ring-expansion by a factor of 6.7:
242                                  Placing the carbene producing 21-diazo/triazolo moiety of the photop
243 g to the calculation, and the N-heterocyclic carbene quinoline-2-ylidene is not formed as a tautomer.
244 ntrolled radical ring-closure process of the carbene radical intermediate involved.
245 age of the intrinsic reactivity of a Co(III) carbene radical intermediate.
246 DBPO) confirm the involvement of cobalt(III) carbene radical intermediates.
247 e investigated, which demonstrates catalytic carbene radical reactivity for a nonporphyrin cobalt(II)
248 o compound leading to formation of a Co(III)-carbene radical, followed by radical ring-closure to pro
249 ro[3.3]hept-1-ylidene is a markedly strained carbene reaction intermediate that was generated by high
250              The index described previously (carbene relative energy of formation) has been extended
251                            This index (CREF; Carbene Relative Energy of Formation), which is easily c
252                      Magnetic bistability of carbenes seems to be a general phenomenon that only depe
253 to either the dirhodium(II) tetracarboxylate carbene series that enjoys widespread preparative use, o
254 onium salts in 40-94 % yields from mesoionic carbene silver complex and Aryl-I-Py2 (OTf)2 .
255 haves like a silver-bound aryl cation or 1,2-carbene-silver carbenoid.
256 ism mediated by an electrophilic, heme-bound carbene species and a model is provided to rationalize t
257 followed by isomerization to yield transient carbene species, one of which was confirmed by trapping
258 ment, one which involves the intermediacy of carbene species.
259 r on the chemical character of the resulting carbenes species is documented by the structures of a ho
260                      The cyclic alkyl(amino) carbene stabilized Si2H2 has been isolated in the molecu
261  double bond, was achieved by reduction of a carbene-stabilized 1,1'-bis(dihaloboryl)ferrocene.
262 ptical and electrochemical properties of the carbene-stabilized diborene unit.
263                  Reaction of thiolate 1 with carbene-stabilized diiodo-bis-silylene (2) (in a 2:1 rat
264                            While reaction of carbene-stabilized disilicon L:Si horizontal lineSi:L (L
265 )Pr2C6H3)CH}2) (8) with HCl.NC5H5 results in carbene-stabilized Si2Cl2 (2) and substituted 1H-imidazo
266 yclopropanes (boriranes) with N-heterocyclic carbene substituents were prepared by a recently discove
267     Bis(p-methoxyphenyl)carbene is the first carbene that at cryogenic temperatures can be isolated i
268 arly, we now describe the first example of a carbene that exhibits differing thermal and photochemica
269 hiazol-2-ylidene, which is an N-heterocyclic carbene that has high-affinity for and is presumed to be
270 s (the conjugate acids of the triazolylidene carbenes) that have not been heretofore examined in vacu
271 e that among different classes of persistent carbenes, the more electrophilic and nucleophilic ones,
272 lectivity of the [2 + 2]cycloaddition of the carbene to the quinoid substrate is highly dependent on
273  form C-C bonds by carbene insertion and add carbenes to both beta-substituted vinylarenes and unacti
274  inactivation pathways of heme protein-based carbene transfer catalysts should aid in the optimizatio
275 ing new enzymes for a variety of non-natural carbene transfer reactions has burgeoned.
276 y patterns like 1,3-carbonyl transpositions, carbene transfer reactions, cascade annulations, macrocy
277 andle carbene donor reagents in biocatalytic carbene transfer reactions.
278 e results constitute an entry into catalytic carbene transformations from oxidized methylene precurso
279 s than about 90 kcal/mol and to proceed by a carbene-type mechanism.
280 tivated metal dihydride featuring a neutral (carbene-type) N-heterocyclic Ga(I) ligand.
281               It does not originate from the carbene under HVFP conditions.
282                                          The carbene undergoes two [1,2]-sigmatropic rearrangements v
283 idatively generated beta-diketone-alpha-gold carbenes using ynones as substrates.
284                For fluorenyl(trifluoromethyl)carbene, very similar results are obtained, but the yiel
285                            The charge-tagged carbene was generated in situ in a tandem mass spectrome
286 c studies indicated that formation of the Ir-carbene was reversible and the slow step of the reaction
287 rst isolable, photoswitchable N-heterocyclic carbene was synthesized and found to undergo reversible
288 ation 20 times greater than when a ruthenium carbene was used.
289 of novel beta-carboline-based N-heterocyclic carbenes was prepared via Mannich reaction between methy
290  carbohydrates by the 1,5 insertion of metal-carbenes, we report herein the robust and scalable conve
291 ne and the related fluorenyl(trifluoromethyl)carbene were synthesized in solid argon and characterize
292                                          The carbenes were generated by falling solid flash vacuum py
293 ts in formation of predominantly the triplet carbene, whereas visible (450 nm) light shifts the photo
294 mperature, produces (alpha-methylbenzylidene)carbene which undergoes a facile Fritsch-Buttenberg-Wiec
295 he key intermediates are cyclopropyl gold(I) carbenes, which have been independently generated by ret
296 at the diazo functional group to form a gold carbene whose subsequent cascade process (intramolecular
297 erated in situ from the coupling of a copper-carbene with a spirocyclic thietane.
298 ting parameters that are typical for triplet carbenes with axial symmetry (|D/hc| = 0.63 cm(-1), |E/h
299                The reaction of rhodium-bound carbenes with strained bicyclic methylene aziridines res
300 Ph3 ]X, rare terminal phosphorano-stabilized carbenes with thorium.

WebLSDに未収録の専門用語(用法)は "新規対訳" から投稿できます。
 
Page Top