Enzyme-mediated enantioselective hydrolysis of 1,2-diol monotosylate derivatives bearing an unsaturated substituent
作者:K. Matsumoto、K. Oohana、M. Hashimoto、K. Usuda、T. Shimoda、H. Ohshima、Y. Suzuki、T. Togawa
DOI:10.1016/j.tet.2018.05.087
日期:2018.7
We have succeeded in the easy preparation of optically active 1,2-diol monotosylates bearing an unsaturated substituent via enzymatic hydrolysis. Lipase PS quickly catalyzes the hydrolyses of 2-acetoxybut-3-enyl tosylate, which has a double bond, and 2-acetoxybut-3-ynyl tosylate, which has a triple bond, with excellent enantioselectivity to afford the corresponding optically active compounds. The reaction
我们已经成功地通过酶水解容易地制备了带有不饱和取代基的光学活性的1,2-二醇单甲苯磺酸酯。脂肪酶PS快速催化具有双键的2-乙酰氧基丁-3-烯基甲苯磺酸酯和具有三键的2-乙酰氧基丁-3-炔基甲苯磺酸酯的水解,具有出色的对映选择性,可提供相应的旋光化合物。该反应也适用于在末端具有双键的较长链的乙酸酯。为了证明该方法的适用性,已从外消旋的2-乙酰氧基戊-4-烯基甲苯磺酸酯中分几步合成了对映体纯的(R)-马苏阿内酯,一种天然椰子香精。此外,该酶可以识别烯烃的立体化学,而(Z)-烯基结构比(E)-异构体更适合于对映选择性水解。