第 50 卷第 2 期Vol. 50 No. 2
2020 年 4 月Apr 2020

所属栏目:医药及中间体

1-叔丁氧羰基-(S)-2-羟甲基氮杂环丁烷的合成
胡 涛,朱晓鹤,朱云龙 (扬子江药物研究院,药物制剂新技术国家重点实验室,江苏 泰州 225321)
摘 要:报道了一种合成(S)-2-羟甲基氮杂环丁烷的新方法,即以γ-丁内酯为起始原料,经溴代开环成2,4-二溴丁酸甲酯(2),然后与(S)-α-苯乙胺双取代环化生成氮杂1-[(S)-1-苯乙基]-2-甲氧羰基氮杂环丁烷的两种非对映异构体3a(2S,1′S)和3b(2R,1′S),经柱层析分离,氢化铝锂还原成醇(4)后,氢解脱去(S)-1-苯乙基和引入Boc保护基生成标题化合物1-叔丁氧羰基-(S)-2-羟甲基氮杂环丁烷。总共4步反应,总收率为40%。1H NMR和MS表征确证了关键中间体和目标产物结构。
关键词:γ-丁内酯;(S)-α-苯乙胺;非对映异构体;2(S)-羟甲基氮杂环丁烷
中图分类号:TQ463  文献标识码:A  文章编号:1009-9212(2020)02-0030-04
Synthesis of 1-Boc-(S)-2-(hydroxymethyl)azetidine
HU Tao, ZHU Xiao-he,ZHU Yun-long (Yangtze River Drug Research Institue, State Key Lab of Advanced Pharmaceutical Formulation with High Technology, Taizhou 225321, China)
Abstract:A novel synthetic approach of(S)-2-(hydroxymethyl)azetidine was described. Starting from γ-butyrolactone, the ring-opening bromization gave methyl 2,4-dibromobutanoate 2. The subsequent bis-substitution cyclization with (S)-α-phenylethanamine provided diastereoisomers 3a and 3b of (S)-methyl 1-((S)-1-phenylethyl)azetidine-2-carboxylate, which could be easily isolated by the column chromatography. The reduction into alcohol 4 with lithium aluminum hydride, followed by the hydrogenesis and Boc protection afforded the title compound (S)-tert-butyl 2-(hydroxymethyl)azetidine-1-carboxylate with an overall yields of 40%. The related compounds were confirmed by 1H NMR and MS.
Key words:γ-butyrolactone; (S)-α-phenylethanamine; diastereoisomers ; 2(S)-(hydroxymethyl)azetidine
作者简介:胡 涛(1975-),男,河南信阳人,高级工程师,主要从事小分子化学新药的药物化学研究(E-mail:hutao@haiyanpharma.com)。
收稿日期:2019-12-03