Z-allylsilanes 1 are epoxidized by V5+/TBHP with high erythro-selectivity (up to 97:3) . HF- or TBAF-induced fragmentation leads to syn-1,3-diols 3. Compound 3f can be transformed within two steps into a key synthon for the lactone moiety of compactin.
Kinetic resolution of racemic β,γ-epoxy esters with pig liver esterase (PLE, e.c. 3.1.1.1.)
作者:Peter Mohr、Lukas Rösslein、Christoph Tamma
DOI:10.1016/s0040-4039(01)80438-x
日期:1989.1
3-Hydroxyglutarate and β,γ-Epoxy Esters as Substrates for Pig Liver Esterase (PLE) and α-Chymotrypsin
作者:Peter Mohr、Lukas Rösslein、Christoph Tamm
DOI:10.1002/hlca.19870700118
日期:1987.2.4
The pH dependence of the α-chymotrypsin-catalyzedhydrolysis of dimethyl 3-hydroxyglutarate (3) has been studied. The e.e. was determined by HPLC analysis of diastereoisomeric camphanoic-acid derivatives. Kinetic resolution of the β,α-epoxy esters 10 and 24 by pig liver esterase has been shown to provide an alternative access to chiral β-hydroxy esters and acids of high optical purity. By this latter