Biocatalytic dynamic reductive kinetic resolution of aryl α-chloro β-keto esters: divergent, stereocontrolled synthesis of diltiazem, clentiazem, and siratiazem
作者:Xiaoping Yue、Yitong Li、Minjie Liu、Di Sang、Zedu Huang、Fener Chen
DOI:10.1039/d2cc03102g
日期:——
of 100 g L−1 of substrate 6b at a ten-gram scale was achieved with a continuous fed-batch strategy, affording anti-(2S,3S)-1b, the key intermediate of diltiazem, in a record-breaking space-time yield of 96 g L−1 d−1. An eight-step synthesis of diltiazem, clentiazem, and siratiazem was accomplished in 32–45% overall yields, featuring this versatile biocatalytic reduction reaction as well as an efficient
对芳基 α-氯 β-酮酯进行酮还原酶 (KRED) 催化的动态还原动力学拆分 (DYRKR) 的首次系统研究,并在 74– 98% 的分离产率,以及中等至优异的非对映选择性(高达 >99 : 1 dr)和良好至优异的对映选择性(大部分 >99% ee)。LfSDR1 催化完全还原 10 克规模的 100 g L -1底物6b是通过连续补料分批策略实现的,在破纪录的时空产量 96 g L -1 d -1. 地尔硫卓、克林特西姆和西拉硫卓的八步合成以 32-45% 的总收率完成,具有这种多功能的生物催化还原反应以及高效、绿色的流动氯化反应。