Process for the synthesis of pergolide

摘要

A process for the synthesis of pergolide (Formula (1)) (D-6-n-propyl-8betamethylmercaptomethylergo line) from acid 9,10-dihydrolysergic is herein disclosed. The process can be carried out without isolating most intermediates and is particularly convenient both from the yield and safety standpoint. Moreover, pergolide thereby obtained is highly pure and can be conveniently transformed into pergolide mesylate.