6,7-Dihydroxybiphenylene-2,3-quinone has been made by the demethylation of its 6,7-dimethyl ether. 6,7-Dihydroxy-1,8-dimethylbiphenylene-2,3-quinone has been made by demethylation followed by aerial oxidation of 2,3,6,7-tetramethoxy-1,8-dimethylbiphenylene, and by the alkaline hydrolysis of 6,7-diacetoxy-1,8-dimethylbiphenylene-2,3-quinone. The properties of these two dibenzologues of squaric acid
6,7-二羟基
联苯-2,3-醌是通过其6,7-二
甲醚的去甲基化反应制得的。通过脱甲基,随后空气氧化2,3,6,7-四甲氧基-1,8-
二甲基联苯和6的碱
水解制得6,7-二羟基-1,8-
二甲基联苯-2,3-醌,7-
二乙酰氧基-1,8-
二甲基联苯-2,3-醌。讨论了这两种
方酸的二
苯甲酸酯的性质。