Asymmetric Catalytic C−H Activation Applied to the Synthesis of <i>Syn</i>-Aldol Products
作者:Huw M. L. Davies、Evan G. Antoulinakis
DOI:10.1021/ol006671j
日期:2000.12.1
[GRAPHICS]Rh-2(R-DOSP)(4)-catalyzed decomposition of methyl phenyldiazoacetate in the presence of tetraalkoxysilanes results in the asymmetric synthesis of syn-aldol products. This catalytic asymmetric intermolecular C-H activation proceeds by means of a rhodium-carbene-induced CH insertion.
Design of .alpha.-alkyl-.beta.-hydroxy esters suitable for providing optical resolution by lipase hydrolysis
A study of the lipase-catalyzed hydrolyses of various alpha-substituted beta-acetoxy esters revealed that a sulfur functional group in the ester, which could play an important role in the stereorecognition by lipase A6 (Aspergillus sp.) and an anti conformation in the ester, promotes satisfactory results in the hydrolysis.
MULZER J.; LAMMER O., CHEM. BER., 119,(1986) N 7, 2178-2190