γ-(△¹-Cyclohexenyl)-y-ketobutyric cinic anhydride on cyclohexene with acid was prepared in an experiment by action of sucaluminium chloride as catalyst. Meanwhile other catalysts of the Lewis acid type, such as ferric chloride and stannic chloride, were also tried, but the results were not satisfactory. In reducing γ-hyclohexenyl)-γ-ketdbutyric acid to γ-(△¹-cyclohexenyl).butyric acid, both Wolff-Kishner's method and Huang Minlon's modification were experimentally employed, the result being unexpectedly in favor of the former.