Divergent stereoselectivity in the reduction of α,β-Epoxy ketones using hydridosilicates
作者:Makoto Hojo、Atsuko Fujii、Chikara Murakami、Hidenori Aihara、Akira Hosomi
DOI:10.1016/0040-4039(94)02255-a
日期:1995.1
α,β-Epoxy ketones are reduced by trimethoxysilane in the presence of a catalytic amount of lithium methoxide to yield the corresponding alcohols. This reaction system reveals divergent selectivity depending on the solvent; both anti-selectivity and syn-selectivity are observed iin less polar Et2O and in polar HMPA, respectively.
在催化量的甲醇锂存在下,通过三甲氧基硅烷还原α,β-环氧酮,得到相应的醇。该反应体系根据溶剂显示出不同的选择性。在较低极性的Et 2 O中和在极性HMPA中分别观察到抗选择性和顺选择性。