Reactions of trichloromethylarenes with hydrazine derivatives. Synthesis of 2,5-disubstituted 1,3,4-oxadiazoles and 1,3,4-thiadiazoles
作者:I. S. Poddubnyi、L. I. Belen'kii、M. M. Krayushkin
DOI:10.1007/bf01431617
日期:1996.5
trichloromethylarenes and thioacylhydrazines or acylhydrazines has been considered. In alcohols as solvents, alkyl arenecarboxylates form as a result of alcoholysis, while 2,5-disubstituted 1,3,4-thiadiazoles (1,3,4-oxadiazoles) form as minor products. In pyridine solutions, the major or sole products are those of reductive condensation,i.e., the correspondingN-substituted hydrazones of arenecarbaldehydes
已经考虑了溶剂对三氯甲基芳烃与硫代酰基肼或酰基肼之间反应过程的影响。在作为溶剂的醇中,由于醇解而形成芳烃羧酸烷基酯,而作为次要产物形成 2,5-二取代的 1,3,4-噻二唑(1,3,4-恶二唑)。在吡啶溶液中,主要或唯一的产物是还原缩合产物,即相应的芳烃甲醛的 N-取代腙。当反应在吡啶-链烷醇混合物中进行时,以良好的产率获得1,3,4-噻二唑或1,3,4-恶二唑衍生物。