作者:Timothy P. Kogan、Todd C. Somers、Michael C. Venuti
DOI:10.1016/s0040-4020(01)87853-4
日期:1990.1
(-)-Indolactam-V (IL-V) (1) -was prepared in 10 steps from L-tryptophan methyl ester in 17.1% overall yield. The key steps involve regiospecific thallation of the acylindole intermediate (4), followed by azide displacement and reduction to introduce the 13-amino group. Control of the C-ll stereocenter was achieved by SN2 displacement of the chiral inflate (10), derived from D-valine. The thallium mediated
由L-色氨酸甲酯以10个步骤制备(-)-吲哚内酰胺-V(IL-V)(1),总产率为17.1%。关键步骤包括酰基环中间体(4)的区域特异的thallation ,然后叠氮化物置换和还原以引入13-氨基。通过衍生自D-缬氨酸的手性膨胀剂(10)的S N 2置换来实现对C-11立体中心的控制。al介导的二肽的封闭(17)没有提供替代途径通往IL-V。