Synthesis of optically active partly gem-difluorinated allylic alcohols via [2,3]-Wittig rearrangements and lipase-catalyzed reaction
作者:Toshiyuki Itoh、Kazutoshi Kudo、Naoko Tanaka、Kohei Sakabe、Yumiko Takagi、Hiroshi Kihara
DOI:10.1016/s0040-4039(00)00640-7
日期:2000.6
rearrangement reaction gave the alcohols with perfect (E)*-selection over the newly created olefin bond for two substrates. Lipase-catalyzed optical resolution of 4,4,5-trifluoroalk-1,5-dien-3-ols was successfully performed to afford optically active partly gem-difluorinated allylic alcohols for the first time.
1,1,2-三氟烯丙基醚的[2,3] -Wittig重排给出了五种新型的4,4,5-三氟烷-1,5-二烯-3-醇。重排反应使醇在两个底物的新生成的烯烃键上具有完美的(E)*选择。成功进行了脂肪酶催化的4,4,5-三氟烷-1,5-二烯-3-醇的光学拆分,首次获得了部分具有光学活性的部分宝石-二氟代烯丙基醇。