Diarylcuprates for Selective Syntheses of Multifunctionalized Ketones from Thioesters under Mild Conditions
作者:Daiki Kato、Tomoya Murase、Jalindar Talode、Haruki Nagae、Hayato Tsurugi、Masahiko Seki、Kazushi Mashima
DOI:10.1002/chem.202200474
日期:2022.5.6
copper-mediated ketone synthesis could be applied to the synthesis of not only gluconolactone-derived ketone 6, a synthetic intermediate in the transformation to the SGLT2 inhibitor canagliflozin, but also thiolactol 8, a valuable synthetic intermediate for (+)-biotin. Control experiments on an isolated diphenylcuprate(I), [CuPh2 ]- (12), and DFT calculations revealed that this ketone synthesis proceeded
通过使用在环境温度下以 1:1.3-1.5 的比例从铜 (I) 盐和芳基格氏试剂原位生成的二芳基铜酸盐 (I) 从硫酯选择性地合成酮。在酮合成过程中,各种官能团,如羰基(酮、酯和酰胺)、O-保护基、卤素和杂芳烃,都可以以优异的收率得到多官能化酮。这种铜介导的酮合成不仅可用于合成葡萄糖酸内酯衍生的酮 6(一种转化为 SGLT2 抑制剂卡格列净的合成中间体),还可以用于合成硫代乳酸 8(一种有价值的 (+)-生物素合成中间体)。对分离的二苯铜酸盐 (I)、[CuPh2]- (12) 的对照实验,