Addition of a carbamoylsilane to N-sulfonylimines: direct synthesis of α-(N-sulfonyl)amino-N-methoxymethyl-N-methylamides
摘要:
N-Methoxymethyl-N-methylcarbamoyl(trimethyl)silane reacted with N-sulfonylimines in anhydrous benzene under catalyst-free conditions to afford alpha-(N-sulfonyl)amino-N-methoxymethyl-N-methylamides in good to excellent yields (71-95%). Furthermore, after acid hydrolysis at room temperature, the corresponding alpha-(N-sulfonyl)amino secondary amides can be formed. (C) 2015 Elsevier Ltd. All rights reserved.
Indium-Mediated Organometallic Reactions in Aqueous Media. Stereoselectivity in the Crotylation of Sulfonimines Bearing a Proximal Chelating Group
作者:Wenshuo Lu、Tak Hang Chan
DOI:10.1021/jo0018038
日期:2001.5.1
Reaction of sulfonimines having proximal chelating groups with crotyl bromide and indium in aqueousmedia gave alpha-crotylation products stereoselectively with syn-selectivity.
Evolution of Late Transition-Metal-Catalyzed Intermolecular Reductive Coupling Reaction of [60]Fullerene and N-Sulfonylaldimines: Competing Formation of Hydrobenzylated [60]Fullerenes and 1,2-Dihydrofullerene
作者:Venkatachalam Rajeshkumar、Shih-Ching Chuang
DOI:10.1002/ejoc.201200055
日期:2012.7
coupling of [60]fullerene with N-sulfonylaldimines to afford novel 1,2hydrobenzylated [60]fullerene derivatives. We found that both group VIIB metals (cobalt, rhodium, iridium) and group VIIIB metals (nickel, palladium, platinum) perform this coupling reaction. A control experiment in the absence of aldimines produced C60H2, which showed that the reaction might proceed via a [60]fullerene metal complex
Catalytic Enantioselective Synthesis of α,β-Diamino Acid Derivatives
作者:Le Li、Madhu Ganesh、Daniel Seidel
DOI:10.1021/ja9034494
日期:2009.8.26
Highly enantio- and diastereoselective organocatalytic Mannich additions of alpha-isothiocyanato imides to sulfonyl imines are reported. Enantiomerically enriched syn-alpha,beta-diamino acidderivatives can be obtained in excellent yields using catalyst loadings as low as 0.25 mol %.
Enantioselective Iridium-Catalyzed Imine Vinylation: Optically Enriched Allylic Amines via Alkyne−Imine Reductive Coupling Mediated by Hydrogen
作者:Ming-Yu Ngai、Andriy Barchuk、Michael J. Krische
DOI:10.1021/ja075438e
日期:2007.10.1
The first asymmetric iridium-catalyzed C−C bond forming hydrogenation is described. By simply hydrogenating alkynes in the presence of N-arylsulfonyl imines using an iridium catalyst modified by (R)-Cl,MeO-BIPHEP, one may obtain the corresponding allylic amines 1b−21b in highly optically enriched form (92−99% ee). This protocol circumvents the use of preformed vinyl metal reagents and is applicable
Highly efficient asymmetric synthesis of
<i>α</i>
‐aminoamides via the reaction of
<i>N</i>
‐sulfonyl imines with chiral carbamoylsilane
作者:Hui Liu、Minggang Zhao、Jianxin Chen
DOI:10.1002/aoc.6948
日期:2023.2
A novel and practical asymmetric synthetic method of α-amino amides by the reaction between N-sulfonylimines and N-methyl-N-R-(1-phenyl)ethylcarbamoyl (trimethyl)silane under the induction of chiral group has been developed. The protocol tolerates various N-sulfonylimines bearing different groups, including aryl, double bond conjugated aryl, heteroaryl, and aliphatic group. Using carbamoylsilane