Abstract
Abstract Pyrolysis of 7,7-dibromobicyclo [4.1.0] heptane* in quinoline solution gives cycloheptatriene in good yield. 2- and 1-Bromocyclohepta-1,3-dienes have been isolated as intermediates. In the absence of base, toluence is the major product. Mixtures of 1-, 2- and 3-methyl- and methoxycycloheptatrienes are obtained from 3-methyl- and 1-methoxy-7,7-dibromonorcaranes respectively. The action of heat on 7,7-dibromonorcarene-2 and -3 has been studied. Some of the cycloheptadiene and cycloheptatriene derivatives described are thermally isomerizable.
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