Formic Acid Reduction. XII. Reductive Fission of Bridged Carbon-Carbon Bond of α, α'-Benzylidene-and α, α'-Methylene-bisketones

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Reductive fission of one of the carbon-carbon bonds of the alkylidene- or aryl-methyl-ene-bond bridged between the two active carbons has been generalized in several examples by means of heating with the formate, triethylammonium formate which has been known as a distil lable liquid given by 5HCO₂H·2NEt₃.