Convenient Preparations of 3,5-Disubstituted 1,2,4-Thiadiazoles by Oxidative Dimerization of Thioamides
作者:Yuji Takikawa、Kazuaki Shimada、Katsuyuki Sato、Shinichi Sato、Saburo Takizawa
DOI:10.1246/bcsj.58.995
日期:1985.3
3,5-Disubstituted 1,2,4-thiadiazoles 2 were prepared by reaction of thioamides 1 with DMSO in the presence of such an electrophilic reagent as 1-methyl-2-chloropyridinium iodide, benzoyl chloride, acetyl chloride, hydrochloric acid, or trimethylsilyl chloride in organic solvents at room temperature in high yields. Thiadiazoles 2 were also obtained by reaction of 1 with NBS at room temperature in high
3,5-二取代的 1,2,4-噻二唑 2 是通过硫代酰胺 1 与 DMSO 在诸如 1-甲基-2-氯吡啶鎓碘化物、苯甲酰氯、乙酰氯、盐酸或室温下在有机溶剂中以高收率制备三甲基氯硅烷。噻二唑 2 也通过 1 与 NBS 在室温下以高产率反应获得。硫代酰胺 S-氧化物在室温下与亲电试剂反应,以高产率得到相应的噻二唑 2。