中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (6S)-5-tert-butyl 6-methyl 1,1-dibromo-5-azaspiro[2.4]heptane-5,6-dicarboxylate | 1412903-76-4 | C13H19Br2NO4 | 413.106 |
N-Boc-4-亚甲基-L-脯氨酸 | (S)-1-(tert-butoxycarbonyl)-4-methylenepyrrolidine-2-carboxylic acid | 84348-38-9 | C11H17NO4 | 227.26 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(S)-5-(叔丁氧羰基)-5-氮杂螺[2.4]庚烷-6-羧酸 | (S)-5-(tert-butoxycarbonyl)-5-azaspiro[2.4]heptane-6-carboxylic acid | 1129634-44-1 | C12H19NO4 | 241.287 |
5-(叔丁基)(S)-5-氮杂螺[2.4]庚烷-5,6-二羧酸6-苄酯 | (6S)-5-azaspiro[2.4]heptane-5,6-dicarboxylic acid 6-benzyl 5-tert-butyl diester | 1175893-54-5 | C19H25NO4 | 331.412 |
We have designed and developed an easily accessible advanced intermediate of ledipasvir that allowed late-stage cyclopropanation and difluorination, thereby providing a novel and more efficient process for the preparation of ledipasvir in the longest linear sequence of 8 steps with 20% overall yield.