Pyrolysis of methyl cis-2-acetoxy-3-cyclohexenecarboxylate at 435" produced a mixture of methyl 2, 4cyclohexadienecarboxylate, methyl 1, 3-cyclohexadienecarboxylate and methyl 1, 5-cyclohexadienecarboxyl~ te. It was shown that each of these three compounds gave this same mixture when passed through the pyrolysis tube under these indentical conditions. Reduction of this mixture of cyclohexadienecarboxvlates gave 4-methylene-2- ...
