respectively. And cis and trans isomers of dimethyl esters of these acids were prepared. (2) By the reduction of the above two acids by zinc and acetic acid, diphenyl-methane-4, 4′-di-γ-oxobutyric acid and biben-zyl-4, 4′-di-γ-oxobutyric acid were prepared. (3) These saturated keto acids were reduced by amalgamated zinc in the mixture of ethanol and hydrochloric acid to diphenyl-methane-4,4′-dibutyric acid and
(1) 在
氯化铝、diphenyl-methane-4, 4'-di-γ-oxocrotonic acid 和 biben-zyl-4,4'-di-γ-oxocrotonic 存在下,二苯
甲烷和二苯
乙烷与
马来酸酐反应分别产生酸。并制备了这些酸的二甲酯的顺式和反式异构体。(2) 将上述两种酸用
锌和
乙酸还原,制备
二苯基甲烷-4, 4'-二-γ-氧代
丁酸和
联苯-4, 4'-二-γ-氧代
丁酸. (3) 这些饱和
酮酸在
乙醇和
盐酸的混合物中被
锌汞齐还原成
二苯基甲烷-4,4'-二
丁酸和二苯基-
乙烷-4,4'-二
丁酸。