A Novel Dehydrazination Reaction. V. The Formation of Various Amides from Aliphatic and Aromatic Carboxylic Acid Hydrazides in the Presence of Chloral
作者:Tetsuji Kametani、Osamu Umezawa
DOI:10.1248/cpb.14.369
日期:——
In the previous papers the reactions between aromatic, aliphatic and heterocyclic carboxylic acid hydrazides and either chloral or bromal in various alcohols were attempted and respective esters were obtained. In this paper the reactions of aromatic and aliphatic acid hydrazide with chloral in the presence of various amines were examined, leading eventually to reveal the formation of our expected acid amides as are shown in Table I and II. The intermediates in this reaction, 1-benzoyl-2-(2, 2, 2-trichloroethylidene) hydrazine (III : R=C6H5-, X=Cl) was found to form the amides (VI) when heated in amines. This fact indicated that the acid hydrazides converted to their amides through III.
在前期的论文中,尝试了芳香族、脂肪族及杂环羧酸酰肼与氯醛或溴醛在不同醇类中的反应,并得到了相应的酯类。本文研究了芳香族和脂肪族羧酸酰肼与氯醛在不同胺类存在下的反应,最终揭示了生成我们预期的酸酰胺,如表I和表II所示。在此反应的中间体,即1-苯甲酰基-2-(2,2,2-三氯亚乙基)酰肼(III:R=C6H5-,X=Cl)在加热条件下与胺类反应生成酰胺(VI)。这一事实表明,羧酸酰肼通过中间体III转化为酰胺。