acidification with hydrogen chloride. The reaction of the ketene N,S-acetals with 2-bromo-1-[5-methyl-1-(p-tolyl)-1H-1,2,3-triazol-4-yl]ethan-1-one or 3-(2-bromoacetyl)-2H-chromen-2-one gave novel thiophenes in good yields. Treatment of the ketene N,S-acetals with hydrazonyl halides afforded 1,3,4-thiadiazoles in good yields. The stereochemistry of the synthesized compounds was studied. Graphical Abstract
摘要
3-氧代丙腈与异
硫氰酸苯酯在含有 KOH 的
DMF 中反应得到相应的
钾盐。后一种盐在用
氯化氢酸化后转化为烯酮 N,S-
缩醛。烯酮 N,S-
缩醛与 2-bromo-1-[5-methyl-1-(p-tolyl)-1H-1,2,3-triazol-4-yl]ethan-1-one 或3-(2-bromoacetyl)-2H-chromen-2-one 以良好的收率得到了新型
噻吩。用腙卤化物处理
乙烯酮 N,S-
缩醛以良好的收率得到 1,3,4-
噻二唑。研究了合成化合物的立体
化学。图形概要