Benz[cd]indoles. Part III. A New Stereospecific Synthesis of Dihydrolysergic Acid and an Entry to 14-Substituted Derivatives
作者:Walter E. Haefliger
DOI:10.1002/hlca.19840670732
日期:1984.11.7
A new convenient synthesis of dihydrolysergic acid is described, which allows the preparation of substituted derivatives, especially those with different substitutents in the aromatic ring. Starting from appropriately substituted 5-nitro-2-tetralones, the synthesis leads via a tricyclic isonitrile to the indole-ring closure as the last step, thus circumventing the troublesome protection/deprotection
描述了一种新的方便的二氢麦角酸的合成方法,该方法可以制备取代的衍生物,尤其是在芳环上具有不同取代基的那些衍生物。从适当取代的5-硝基-2-四氢萘酮开始,合成过程最后一步是通过三环异腈导致吲哚环封闭,从而避免了麻烦的保护/脱保护。