Lipase-catalyzed kinetic resolution of thiotetronic acid derivatives bearing a chiral quaternary carbon: total synthesis of (R)-thiolactomycin and its O-analogue
作者:Ken-ichi Toyama、Tetsuo Tauchi、Nobuyuki Mase、Hidemi Yoda、Kunihiko Takabe
DOI:10.1016/j.tetlet.2006.07.152
日期:2006.10
We have developed a chemoenzymatic synthesis of (R)-thiolactomycin (1) having a chiral quaternary carbon atom at C5. In the kinetic resolution of the thiotetronic acid precursor 4, both enantiomers were obtained with high enantiomeric excess by use of Chirazyme® L-2. Chemical transformations of the (R)-alcohol 4 provided the chiral (R)-thiolactomycin (1) in 36% yield in five steps.
我们已经开发了在C5上具有手性季碳原子的(R)-硫代催乳素(1)的化学酶法合成方法。在thiotetronic酸前体的动力学拆分4,用高对映体过量通过使用固定化脂肪酶的获得两种对映体® L-2。(R)-醇4的化学转化在五个步骤中以36%的产率提供了手性(R)-硫代催乳素(1)。