Silylative Kinetic Resolution of Racemic 2,2‐Dialkyl 5‐ and 6‐Membered Cyclic Benzylic Alcohol Derivatives Catalyzed by Chiral Guanidine, (
<i>R</i>
)‐
<i>N</i>
‐Methylbenzoguanidine
作者:Shuhei Yoshimatsu、Kenya Nakata
DOI:10.1002/adsc.201900761
日期:2019.10.22
Efficient silylative kinetic resolution of racemic 2,2‐dialkyl 5‐ and 6‐membered cyclic benzylic alcohols was achieved using diphenylmethylchlorosilane (Ph2MeSiCl) or phenyldimethylchlorosilane (PhMe2SiCl) as a silyl source catalyzed by chiral guanidine. The reaction could be applied to a broad range of 2,2‐dialkyl 1‐indanols with good s‐values, irrespective of the electronic nature of the substituent
使用二苯基甲基氯硅烷(Ph 2 MeSiCl)或苯基二甲基氯硅烷(PhMe 2 SiCl)作为手性胍催化的甲硅烷基来源,可实现高效消旋的2,2-二烷基5-和6-元环状苄醇的甲硅烷基动力学拆分。不论底物芳环上取代基的电子性质和C2位上取代基的类型如何,该反应均可用于具有良好s值的各种2,2-二烷基1-茚满醇。另外,反应中可以采用几种2,2-二甲基6元环和杂环醇。