Stereochemistry of cyclic compounds. Communication 67. Conformationl peculiarities of 4-cyclohexene-cis-1,2-dicarboxylic anhydrides

The stereochemistry of the epoxidation of cis-3-methyl-4-cyclohexene-cis-1,2-dicarboxylic anhydride was studied, and further experimental confirmation was obtained of the boat conformation of the six-membered ring in 4-eyclohexene-1,2-dicarboxylic anhydrides.