It is shown, that the reaction of Ag-compounds of monoacyl hydrazones with acyl chlorides does not lead to the exclusive formation of 1,3,4-oxadiazolines as assumed by Stollé,4 but also yields diacyl hydrazones. Thus in the reaction of Ag-fluorenone-monoacetyl-hydrazone with acetyl or benzoyl chloride we obtained the corresponding oxadiazolines whereas Ag-fluorenone-monobenzoyl-hydrazone with acetyl
结果表明,单酰基的Ag化合物与酰
氯的反应不会导致Stollé[ 4]认为仅形成1,3,4-恶二唑啉,但还会生成二酰基。因此,在Ag-
芴酮-单乙酰-与乙酰基或
苯甲酰氯的反应中,我们获得了相应的恶二唑啉,而Ag-
芴酮-单苯甲酰-与
乙酰氯的反应得到了
芴酮-乙酰基-苯甲酰-,其结构被独立地证明。合成。假定在该反应中形成了作为中间体的偶氮二甲
亚胺,其分别异构化为恶二唑啉或。单酰基的碱
金属盐的反应仅导致二酰基。