A new synthesis of medium ring and macrocyclic acetylenic lactones from oxabicycloalkenones via their tosylhydrazones
作者:Jaswant Rai Mahajan、In�s Sabioni Resck
DOI:10.1039/c39930001748
日期:——
Tosylhydrazones 4a–d of vinylogous lactones 1a–d on treatment with N-bromosuccinimide, under strictly controlled conditions, give the title acetylenic compounds 5a–d in 65–90% yield.