Rearrangement of 1,4,5,6-tetrahalo-7,7-dimethoxybicyclo[2.2.1]hept-5-en-2-ones to phenolic derivatives
Abstract
A simple Diels–Alder route leading to methyl 2,3,4-trihalo-5-hydroxybenzoates via thermal Grob-type rearrangement of easily accessible 1,4,5,6-tetrahalo-7,7-dimethoxybicyclo[2.2.1]hept-5-en-2-one with concomitant