作者:Yuan, Dingding、Peng, Qiujun、Xia, Wenwen、Yu, Wansheng、Ruan, Libo、Wang, Yaping、Chen, Yu、Pan, Xianhua
DOI:10.1021/acs.oprd.4c00039
日期:——
A new synthesis of tert-butyl (1R,2S,5S)-2-amino-5-(dimethylcarbamoyl)cyclohexylcarbamate, a key intermediate of edoxaban, is disclosed. This compound is a cyclohexane cis-diamine whose structure is a synthetic challenge. The known synthetic methods suffer from drawbacks, such as low yield, long reaction times, as well as excessive use of NaN3. The new method includes a total of nine steps starting
公开了艾多沙班的关键中间体(1R,2S,5S)-2-氨基-5-(二甲基氨基甲酰基)环己基氨基甲酸叔丁酯的新合成方法。该化合物是环己烷顺二胺,其结构是一个合成挑战。已知的合成方法存在诸如收率低、反应时间长以及NaN 3 的过度使用等缺点。新方法从已知化合物(1S,4S,5S)-4-bromo-6-oxabicyclo[3.2.1]octan-7-one开始,总共包括九个步骤,其γ-丁内酯框架是开环的经过前两步后形成反式-3-叠氮基-4-羟基环己烷。随后的氧化导致环己酮的形成,然后通过酶催化的不对称还原胺化、CbzCl酰化和叠氮基的还原依次转化为顺式二胺。通过 (Boc) 2 O 酰化,然后脱除 Cbz 基团,最终形成目标物 (1R,2S,5S)-2-氨基-5-(二甲基氨基甲酰基)环己基氨基甲酸叔丁酯使用氢化。