作者:Yuusaku Yokoyama、Kazuhiro Kondo、Masako Mitsuhashi、Yasuoki Murakami
DOI:10.1016/s0040-4039(97)82950-4
日期:1996.12
The total synthesis of optically active chanoclavine-I, an ergot alkaloid, was accomplished using palladium-catalyzed intramolecular cyclization (Heck reaction) as a key step. The conjugate ester (6) was obtained in 2 steps from optically active 4-bromotryptophan (10), and the cyclization of 6 proceeded smoothly without racemization to give the key intermediate, tricyclic tetrahydrobenz[c,d]indole
使用钯催化的分子内环化反应(Heck反应)作为关键步骤,完成了麦角生物碱麦角生物碱-光学活性香茅素I的全合成。从旋光的4-溴色氨酸(10)分两步获得共轭酯(6),平稳地进行6的环化而不消旋,得到关键中间体三环四氢苯并[ c,d ]吲哚衍生物(7)。高产。