Reactions of α-Polyhalo Ketone Tosylhydrazones with Sulfide Ion and Primary Amines. Cyclization to 1,2,3-Thiadiazoles and 1,2,3-Triazoles
作者:Kunikazu Sakai、Nobuko Hida、Kiyosi Kondo
DOI:10.1246/bcsj.59.179
日期:1986.1
precursor of diazodithioacetate which is generated by treatment of the hydrazone with sulfide ion. This spontaneously cyclizes it to 5-mercapto-1,2,3-thiadiazole. The precursor also gives a 5-amino-1,2,3-triazole on reaction with an amine. α,α-Dichloro ketone tosylhydrazones similarly cyclize to give 1,2,3-thiadiazoles and 1,2,3-triazoles.
三氯乙醛甲苯磺酰腙是一种极好的重氮二硫代乙酸前体,它是通过用硫化物离子处理腙而产生的。这会自发地将其环化为 5-巯基-1,2,3-噻二唑。前体在与胺反应时还产生 5-氨基-1,2,3-三唑。α,α-二氯酮甲苯磺酰腙类似地环化生成 1,2,3-噻二唑和 1,2,3-三唑。