A re-examination of the methylenation reaction of 1-hydroxy-2-mercapto-, 1,2-dihydroxy- and 1,2-dimercapto-substituted benzenes by bromochloromethane with cesium carbonate shows that these substrates give mixtures of five- and ten-membered benzocondensed heterocyclic compounds and in some cases even dibenzodioxines.
Cabiddu, Maria Grazia,Cadoni, Enzo,De Montis, Stefania,Fattuoni, Claudia,Melis, Stefana,Usai, Michele