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.
16 hyl)isoquinoline 19 and 1-isoquinolyl-((13)C-carbene) 22, which undergoes carbene-nitrene rearrangeme
22 peak, conducted to electrogenerated phenacyl carbenes after halide evolution on the first obtained br
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
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
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
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
39 ples of tricarbontriphosphide coordinated by carbenes and are likely formed via trimerization of the
41 boraanthracene) stabilized by N-heterocyclic carbenes and its one- and two-electron oxidized congener
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
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
52 synthesis of storable bicyclic (alkyl)(amino)carbenes (BICAACs), which feature enhanced sigma-donatin
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
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.
69 le hemilabile bidentate cyclic (alkyl)(amino)carbenes (CAACs) featuring alkene, ether, amine, imine,
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
83 ole of the acceptor substituent flanking the carbene center being the major selectivity determining f
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
88 s tremendous preparative importance, rhodium carbene chemistry has been studied extensively during pa
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
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
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
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
113 for exploiting gaseous and/or hard-to-handle carbene donor reagents in biocatalytic carbene transfer
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
118 much improved properties of this probe make carbene footprinting a viable method for rapid and accur
123 taining pure triplet p-tolyl(trifluoromethyl)carbene from 3 to 25 K leads to an interconversion of up
127 he latter react with isonitriles and singlet carbenes giving (phosphino)phosphinidene-isonitrile (>P-
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
135 (MICs) have emerged as an important class of carbene, however they are found in the free form or liga
137 reacts with carbon monoxide, stable singlet carbenes, including the poor pi-accepting imidazol-2-yli
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
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
150 (3))-H bond to a C(sp(3))-C bond via an iron carbene intermediate represents a long-standing challeng
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
157 dium in place of iron catalyze insertions of carbenes into C-H bonds with up to 98% enantiomeric exce
162 An alternative way to generate the singlet carbene is the reaction of the triplet with water molecu
164 uding diazoalkane derivatives and alkylidene carbenes, it is possible to induce novel Grob-type C-C f
166 particular the relative contributions of the carbene (LAu(+)[double bond, length as m-dash]CR2) and a
169 roducts result from insertion of a palladium-carbene ligand into the N-H bond of the aromatic N-heter
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
182 tigations support that an electrophilic iron carbene mediates homolytic C-H cleavage and rebounds fro
189 in the chemical conversion of N-heterocyclic carbene molecules attached to catalytic particles is map
191 to amine products form via an intramolecular carbene N-H insertion, and the imidazopyrrolopyrazines f
193 eveal that a 1,2-phenyl shift in the singlet carbene needs to overcome a barrier of only 3.8 kcal/mol
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
203 The use of an electron-rich N-heterocycilc carbene (NHC) ligand is effective to inhibit undesired b
205 It is well-recognized that N-heterocyclic carbene (NHC) ligands have provided a new dimension to t
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
210 nk the dicarbollide ion to an N-heterocyclic carbene (NHC) to form an isolable N-dicarbollide-substit
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
215 and characterization of novel N-heterocyclic carbene (NHC)-gold(I) complexes and their bioconjugation
217 ensive characterization of an N-heterocyclic carbene (NHC)-modified supported heterogeneous catalyst.
221 e of organocatalysts, such as N-heterocyclic carbenes (NHCs) and N-heterocyclic olefins (NHOs) as wel
223 e of formation of (i) neutral N-heterocyclic carbenes (NHCs) by deprotonation of heterocyclic salts a
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
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
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
241 ds indicate that ring-contraction within the carbene prevails over ring-expansion by a factor of 6.7:
243 g to the calculation, and the N-heterocyclic carbene quinoline-2-ylidene is not formed as a tautomer.
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
253 to either the dirhodium(II) tetracarboxylate carbene series that enjoys widespread preparative use, o
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
259 r on the chemical character of the resulting carbenes species is documented by the structures of a ho
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
276 y patterns like 1,3-carbonyl transpositions, carbene transfer reactions, cascade annulations, macrocy
278 e results constitute an entry into catalytic carbene transformations from oxidized methylene precurso
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
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
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
298 ting parameters that are typical for triplet carbenes with axial symmetry (|D/hc| = 0.63 cm(-1), |E/h
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。