戻る
「早戻しボタン」を押すと検索画面に戻ります。 [閉じる]

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                                 A range of 1-allenyl-2-amino alcohols were obtained with excellent re
2       Rapid scrambling of axial chirality of allenyl acetates in the presence of Rh(I) catalysts enab
3                      This asymmetric APKR of allenyl acetates is a rare example of a Type I DyKAT rea
4 synthesis of homopropargylic alcohols via an allenyl addition to indoline-2,3-diones.
5 e propargylic group is generally favored (vs allenyl addition; 89:11 to >98:2 selectivity); 1,5-enyne
6 rolin-2-ones, while similar treatment of the allenyl adducts affords 4-alkylidine- pyrrolidin-2-ones
7 ct is proposed in which the initially formed allenyl alcohol 3 undergoes dehydration to provide an al
8 lectivity, when the alpha-substituent of the allenyl alcohol is changed from methyl to cyclopropyl, w
9 lation of a series of aldehydes 1 to provide allenyl alcohol product 3 as a single diastereoisomer.
10                                          The allenyl alcohol products can be further converted to dih
11 see eq 7), the other for the cyclizations of allenyl alcohols (see eq 11).
12 ioselective alkylation of racemic tertiary a-allenyl alcohols with tetrasubstituted silyl ketene acet
13 talyzed cyclization of N-allenyl carbamates, allenyl alcohols, and 2-allenyl indoles that possessed a
14                       A new nickel-catalyzed allenyl aldehyde cyclization was developed in the approa
15 nd tertiary alkyl, as well as alkenyl, aryl, allenyl and alkynyl groups.
16 ves mixtures of alpha-substituted conjugated allenyl and beta,gamma-alkynyl deconjugated esters.
17 divergent Au-catalyzed cycloisomerization of allenyl and homopropargylic ketones into synthetically v
18 and enantioselective gamma-hydroamination of allenyl and propargyl esters with N-methoxy carbamate nu
19                  Thermal rearrangements of 2-allenyl- and 2-alkynyl-3-(2-ethenylphenyl)-4,4-dimethoxy
20             Calculations of the C-Zn BDEs in allenyl- and propargylzinc species were performed with t
21                      A (3 + 2) annulation of allenyl- and, after rapid isomerization, propargylsilane
22 molecular oxidative amino-hydroxylation of o-allenyl anilines is reported.
23 extrusion of a hydrogen radical, leads to an allenyl anion that is detected in the ESI-MS as [M - H -
24               Gold(I) complexes react with 4-allenyl arenes in an exo fashion to furnish vinyl-substi
25 e cyclization of a series of nonheterocyclic allenyl aryl ketones was examined using boron trifluorid
26                     A commercially available allenyl-boron compound or a monosubstituted allene may b
27 that involves a nitrile and a trisubstituted allenyl boronate.
28 ecifically with formal SN2' pathways to give allenyl boronates.
29 talyzed C-C bond formations between allyl or allenyl boronic esters and acetals, ketals, or aminals h
30 ce of adducts resulting from the trapping of allenyl canonical forms was supported by DFT calculation
31 catalyzed intramolecular hydroamination of N-allenyl carbamates tolerated substitution at the alkyl a
32                Au-catalyzed cyclization of N-allenyl carbamates, allenyl alcohols, and 2-allenyl indo
33                                              Allenyl carbinol ester 3 isomerizes to an E,Z mixture of
34  first leading to the formation of an Ir-pai-allenyl carbocation intermediate through a turn-over-det
35 ates tolerated substitution at the alkyl and allenyl carbon atoms and was effective for the formation
36                                              Allenyl carbonate was used as a 1,3-butadiene surrogate
37 gated alkynyl carbonyls to the corresponding allenyl carbonyls is described.
38         A chiral pentafluorophenyl-gold(III) allenyl complex with the gold atoms coordinated to the g
39 and isobutyronitrile, affording the Fe amido allenyl complexes [Ph(2)B((t)BuIm)(2)Fe(NHDipp)((R(1))C=
40 luorophenyl-, and triphenylphosphine-gold(I) allenyl complexes were prepared in which the alpha carbo
41            While the regioselectivity of the allenyl compounds and the relative reactivity of the bor
42                  At ambient temperature, the allenyl compounds undergo an electrocyclic cascade to gi
43 ol for the gamma-hydrofunctionalization of N-allenyl compounds using various heteronucleophiles catal
44                                              Allenyl-containing products are generated in up to 95% y
45         Previous studies have shown that the allenyl Cope rearrangement of 1,2, 6-heptatriene (1) to
46 re recently, the conformationally restricted allenyl Cope rearrangement of syn-7-allenylnorbornene (7
47  surface for the conformationally restricted allenyl Cope rearrangements of syn-5-propadienylbicylco[
48 e first reported examples of fully concerted allenyl Cope rearrangements.
49 es from the coupling reaction of alkenyl and allenyl cycloalkanols with aryl diazonium salts.
50 aryl and (cyclo)alkyl sodium sulfinates to N-allenyl derivatives, which proceeds in water, is describ
51 terminal alkyne and the subsequent propargyl/allenyl dianion were shown to be crucial for the reactio
52 dynamic kinetic asymmetric transformation of allenyl electrophiles affords C-alkylation products in h
53 nce of the catalyst upon the geometry of the allenyl enolate formed in the addition step.
54                Interception of the transient allenyl enolate intermediate of the vanadium-catalyzed M
55 rride innate stereoelectronic effects of the allenyl enolate reactive intermediate.
56 he regiochemistry of bisfunctionalization of allenyl ester homologues remained controlled by the este
57 ponents and allows efficient generation of B-allenyl ester products in good yield and with excellent
58 on resulting from covalent activation of the allenyl ester substrate.
59 catalyzed isomerization to the corresponding allenyl ester.
60 kynyl esters to alpha-substituted conjugated allenyl esters (racemic) through the use of strong amide
61 mples of a Michael-Stork enamine addition to allenyl esters and ketones.
62 lyzed regioselective bisfunctionalization of allenyl esters with boronic acids (nucleophiles) and ald
63 l cycloalkanones are added to functionalized allenyl esters, leading to a lactone intermediate that i
64 alkylcuprates with alpha,beta-ynoates, alpha-allenyl esters, or alpha.beta-enoates or enimides underg
65 additions of alpha-aminoalkylcuprates to the allenyl esters, while poor stereoselectivity results in
66 s and with alpha,beta-beta,gamma-unsaturated allenyl esters.
67 d deconjugated alkynyl esters and conjugated allenyl esters.
68 ones, and 4-alkylidineindolizidin-2-ones via allenyl esters; pyrrolin-2-ones, tetrahydropyrrolizin-2-
69 arbanions to the terminal position of methyl allenyl ether is associated with unusually low activatio
70 e propargyl ether group to the corresponding allenyl ether, followed by oxidative cleavage with N-met
71 clopentannelation reaction that makes use of allenyl ether-derived nucleophiles has been probed.
72  (SET) from 2-azaallyl anions to 2-iodo aryl allenyl ethers initiates a radical cyclization that is f
73  acetophenone to methyl propargyl and methyl allenyl ethers is considered.
74 philic addition to alkyl propargyl and alkyl allenyl ethers yielding, along with (Z)-monoadducts, up
75 nese-catalyzed Z-selective hydroarylation of allenyl ethylene carbonates (AECs) under mild conditions
76                                Unprecedented allenyl gold complexes have been achieved starting from
77  substitutions that result in addition of an allenyl group (<2% propargyl addition) and formation of
78              After the distannylation of the allenyl group with hexamethylditin catalyzed by the Pd c
79  phosphine-catalyzed [4+1] cycloadditions of allenyl imides have been discovered using various N-base
80                           The addition of an allenyl indium intermediate to chiral N-tert-butanesulfi
81 ossible reaction routes were studied, and N-(allenyl)indole-2-carbonitrile was identified as the key
82 roarylation reaction of beta-lactam-tethered allenyl indoles gives azeto-oxepino[4,5-b]indol-2-ones,
83 -allenyl carbamates, allenyl alcohols, and 2-allenyl indoles that possessed an axially chiral allenyl
84                                            2-Allenyl indoles underwent Au-catalyzed intramolecular hy
85 alculations suggest that an eta(3)-propargyl/allenyl Ir intermediate is generated upon pai-complexati
86 ction proceeds through the initial propargyl-allenyl isomerization followed by the cyclization into t
87 induced 6-benzannulation involving propargyl-allenyl isomerization of the dieneyne moieties in the co
88 on displayed a broad scope, and no traces of allenyl isomers were detected for simple propargyl bromi
89 l bromide, whereas mixtures of propargyl and allenyl isomers were observed for substituted propargyl
90 icle, the AuCl3-catalyzed hydrofurylation of allenyl ketone, vinyl ketone, ketone, and alcohol substr
91 ms are observed, one for the cyclizations of allenyl ketones (see eq 7), the other for the cyclizatio
92 heletropic extrusion of CO with formation of allenyl ketones 4.
93 ion-metal carbene complexes, including alpha-allenyl ketones and amino-substituted heterocycles.
94 ld base, NEt(3), leading to the formation of allenyl ketones and propargyl ketones.
95                                     Aromatic allenyl ketones undergo a phosphine-promoted dimerizatio
96 -bromophenylmethylidenefuranones also afford allenyl ketones upon flash vacuum thermolysis, but in ad
97 d 2-furylthiophenes 16 by cyclization of the allenyl ketones.
98 rthermore, DFT calculations on the propargyl/allenyl lithium intermediates formed in the course of th
99                                  Reaction of allenyl methyl ketone 4 with exo-enones afforded spirocy
100                            In the case of an allenyl methyl ketone, cyclopentyl enamine addition led
101 ation promoted by coordination of gold(I) to allenyl moiety lacks a discernible intermediate despite
102 nyl indoles that possessed an axially chiral allenyl moiety occurred with transfer of chirality from
103 occurred with transfer of chirality from the allenyl moiety to the newly formed stereogenic tetrahedr
104 alytic methods for the addition of allyl and allenyl organoboron reagents to fluorine-substituted ket
105      A novel method for the preparation of 4-allenyl-oxazolines 2 is described via the reaction of 2-
106 um with an R(3) group oriented syn and sigma-allenyl palladium complexes.
107 e elimination modes from the n(3)-allyl-n(1)-allenyl palladium intermediate species.
108 nit on the oxindole or indole reacts with an allenyl-palladium species, formed from oxidative additio
109  sigma-bond formation in 4, not the terminal allenyl pi-bond MO.
110 wo least stable modes of coordination at the allenyl pi-system display reactivity that is intermediat
111 ive salts such as LiCl lead primarily to the allenyl product while the use of HMPA as a cosolvent giv
112 oup yields H(2)C=C=CFP(O)(OEt)(2) through an allenyl-propargyl resonance stabilized anion.
113             The first characterization of an allenyl radical by single crystal X-ray crystallography
114 -Co(III)-propargyl radical and gamma-Co(III)-allenyl radical.
115 yl)(amino)carbenes (CAACs) affords propargyl/allenyl radicals.
116 ves causes allylic rearrangements, propargyl-allenyl rearrangement, conversion of benzyl cyanates to
117 ieved from the reaction of the corresponding allenyl (S)-N-tert-butylsulfinimies through the followin
118 y and good to excellent control of propargyl/allenyl selectivity.
119                                          The allenyl silyl group can also be transferred to the adjac
120 iates followed by 1,2-group migration to the allenyl sp carbon during cycloisomerization.
121 eric encumbrance of the terminal alkynyl and allenyl subsituents.
122 , nipecotic acid derivatives containing an N-allenyl substituent were synthesized with good yields us
123 oles to generate oxindoles bearing allyl- or allenyl-substituted quaternary centers.
124                                              Allenyl sulfinimines can be stereoselectively cyclized w
125 nesulfinate anion-mediated activation of the allenyl sulfone analogous to phosphine-triggered reactio
126 cologically prevalent picolyl amides with an allenyl sulfone, 1-methyl-4-(propa-1,2-dien-1-ylsulfonyl
127 ulation reaction involving alpha-substituted allenyl sulfones and aromatic thiolates displaying an or
128                    The addition of lithiated allenyl sulfones to nonracemic sulfinimines furnished su
129 fones functioned as synthetic equivalents of allenyl sulfones under these conditions.
130 ch-stable and nonhygroscopic monosubstituted allenyl sulfonium salt (ATT) synthesized from thianthren
131                     The reagent is the first allenyl sulfonium salt that can undergo palladium-cataly
132 imines furnished sulfinamides possessing the allenyl sulfonyl moiety with excellent diastereoselectiv
133 g ketone carbanion addition to propargyl and allenyl systems occurs with activation energies typical
134                     Different 1,3-dipoles of allenyl-type were employed, giving different regioselect
135 and promotes highly selective addition of an allenyl unit (vs a propargyl group).
136 catalyzed [3,3] sigmatropic rearrangement of allenyl vinyl ethers by density functional theory calcul
137 e Lewis acid mediated Nazarov reaction of an allenyl vinyl ketone was intercepted by acyclic, 2-silyl
138 m Nazarov/cycloaddition process involving an allenyl vinyl ketone with a diene has been carried out u
139 3-etherate of a series of carbon-substituted allenyl vinyl ketones provided intermediates in which su
140 e near complete transfer of chirality in the allenyl-Zn-Brook rearrangement and the highly organized
141  alkynylation of acylsilanes, followed by an allenyl-Zn-Brook rearrangement and Zn-ene-allene (or Zn-
142               DFT calculations show that the allenyl-Zn-Brook rearrangement occurs in preference to t

 
Page Top