The asymmetric synthesis of α-amino and α-hydrazino acid derivatives via the stereoselective amination of chiral enolates with azodicarboxylate esters
作者:David A. Evans、Thomas C. Britton、Roberta L. Dorow、Joseph F. Dellaria
DOI:10.1016/s0040-4020(01)86058-0
日期:1988.1
(+)NH2 and (+)NH-NH2 synthons in highly diastereoselective reactions with chiral carboximide-derived enolates has been demonstrated. The lithium enolates derived from 4-substituted N-acyl 2-oxazolidinones were found to react with di-tert-butyl azodicarboxylate (DBAD) to afford the derived 2-hydrazido carboxylic acidderivatives in yields in excess of 90%. The diastereoselectivities of these reactions
Catalytic dehydrogenative N-((triisopropylsilyl)oxy)carbonyl (Tsoc) protection of amines using iPr<sub>3</sub>SiH and CO<sub>2</sub>
作者:S. Tanaka、T. Yamamura、S. Nakane、M. Kitamura
DOI:10.1039/c5cc04594k
日期:——
Heterogeneous Pd/C efficiently catalyzes the dehydrogenative N-((triisopropylsilyl)oxy)carbonyl (Tsoc) protection of amines using iPr3SiH and CO2 without the liberation of any salts.