The deamination of α-aminocyclohexanones has been shown to give cyclopentane carboxylic acids, bicyclo [3, 1, 0] hexane-2-ones, and 2-methyl-2-cyclopentene-1-ones. Deamination of 3-endo-aminocamphor gave cyclocamphanone, 6-isopropenyl-6-methyl-2- cyclohexen-1-one, and 6-(1'-hydroxy-1'-methylethyl)-6-methyl-2-cyclohexen-1-one. The formation of bicyclo [3, 1, 0] hexane by deamination of cyclohexylamine is reported for the ...