Asymmetric Total Synthesis of a Beer-Aroma Constituent Based on Enantioconvergent Biocatalytic Hydrolysis of Trisubstituted Epoxides
作者:Andreas Steinreiber、Sandra F. Mayer、Kurt Faber
DOI:10.1055/s-2001-17713
日期:——
A short asymmetric total synthesis of the plant constituent myrcenediol [(R)-1], and (S)-7,7-dimethyl-6,8-dioxabicyclo[3.2.1]octane (2), which is a volatile constituent of the aroma of beer was accomplished via a chemoenzymatic protocol. The key step consisted of a biocatalytic hydrolysis of trisubstituted epoxides bearing olefinic side chains which proceeded in an enantioconvergent fashion, i.e., a single enantiomeric vic-diol was obtained from the racemate in up to 91% ee and 92% isolated yield.
植物成分月桂烯二醇 [(R)-1] 和 (S)-7,7-二甲基-6,8-二氧杂双环[3.2.1]辛烷 (2)(一种挥发性成分)的简短不对称全合成啤酒的香气是通过化学酶协议实现的。关键步骤包括带有烯属侧链的三取代环氧化物的生物催化水解,该水解以对映体聚合方式进行,即从外消旋物中获得单一对映体vic-二醇,其ee率高达91%,分离产率高达92%。