The highly enantioselective phase-transfer catalytic mono-alkylation of malonamic esters
作者:Mi-hyun Kim、Sea-hoon Choi、Yeon-Ju Lee、Jihye Lee、Keepyung Nahm、Byeong-Seon Jeong、Hyeung-geun Park、Sang-sup Jew
DOI:10.1039/b821468a
日期:——
The phase-transfer catalytic alkylation of N,N-dialkylmalonamic tert-butyl esters in the presence of 1 mol% of (S,S)-3,4,5-trifluorophenyl-NAS bromide afforded highly enantioselective (S)-mono-α-alkylated products (up to 96% ee), which could be readily converted into versatile chiral building blocks without loss of chirality.
在1摩尔%(S,S)-3,4,5-三氟苯基-NAS溴化物的存在下,N,N-二烷基丙二酰胺叔丁酯的相转移催化烷基化反应,以高度对映选择性(高达96% ee)制备了(S)-单-α-烷基化产物,这些产物可以方便地转化为多样的手性构建块,而不损失手性。