The exceptionally rapid stereomutation of a bicyclo[2,1,0]pentane
Abstract
endo-syn-1,7,8,9-Tetrachloro-10,10-dimethoxytetracyclo[5,2,1,02,603,5]dec-8-ene (II), obtained by photolysis of diazanorbornane derivative (III), isomerises unexpectedly easily into the endo-anti-isomer (I).