作者:Klaus Edegger、Sandra F Mayer、Andreas Steinreiber、Kurt Faber
DOI:10.1016/j.tet.2003.10.106
日期:2004.1
Asymmetric biohydrolysis of trisubstituted terpenoid oxiranes (rac-1a–rac-3a) was accomplished by employing the epoxide hydrolase activity Rhodococcus and Streptomyces spp. Depending on the biocatalyst, the biohydrolysis proceeded in an enantio-convergent fashion and gave the corresponding vic-diols in up to 97% ee at conversions beyond the 50%-threshold. In order to avoid a depletion of the ee of
三取代萜类化合物肟(rac - 1a – rac - 3a)的不对称生物水解是通过利用环氧化酶活性红球菌和链霉菌属(Streptomyces spp )来完成的。取决于生物催化剂,所述biohydrolysis在对映会聚方式进行,并且得到相应的VIC在高达97%的ee值-diols在50% -阈值超出转换。为了避免通过进一步的氧化代谢耗尽产物的ee,必须在惰性气氛中排除分子氧进行生物转化。单萜类香豆素的不对称全合成证明了该方法的合成适用性(R)-(+)-Marmin在95%ee中。