acetone, ethyl methyl ketone, diethyl ketone, cyclohexanone, and 1-methyl-4-piperidone in the presence of acid gave the 1,1-disubstituted 1,2,3,4-tetrahydrophthalazines (2)–(6). On the other hand, the reactions of 3-hydroxybenzoylhydrazine (7) with acetone, cyclohexanone, and benzalde-hyde gave the Schiff's bases (8)–(10).
3-羟基苄
肼与
丙酮,乙基甲基酮,
二乙基酮,
环己酮和1-甲基-
4-哌啶酮在酸存在下的缩合反应得到1,1-二取代的1,2,3,4-四氢
邻苯二甲酸(2)– (6)。另一方面,3-羟基苯甲酰
肼(7)与
丙酮,
环己酮和
苯甲醛的反应生成席夫碱(8)–(10)。