Reactions of 4-chloro-5<i>h</i>-1,2,3-dithiazole-5-thione with α,β-unsaturated β-amino esters: Formation of 2-[2-(1-alkenylsulfanyl-1-alkoxycarbonyl-2-amino)-1,2-dicyano-vinylsulfanyl]-3-amino-2-alkenoic alkyl esters
作者:Yong-Goo Chang、Kyongtae Kim、Yung Ja Park
DOI:10.1002/jhet.5570390103
日期:2002.1
Treatment of 4-chloro-5H-1,2,3-dithiazole-5-thione with alkyl 3-alkyl (or aryl)-3-amino-2-propenoates in the presence of pyridine (2 equivalents) in dichloromethane at reflux gave 2-[2-(1-alkenylsulfanyl-1-alkoxy-carbonyl-2-amino)-1,2-dicyanovinylsulfanyl]-4 and-1,2-dicyanovinyldisulfanyl]-3-amino-2-alkenoic alkyl esters 7 in 16 to 60% and 8 to 48% yields, respectively.
在吡啶(2当量)在二氯甲烷中回流下,用3-烷基(或芳基)-3-氨基-2-丙烯酸烷基酯处理4-氯-5 H -1,2,3-二噻唑-5-硫酮得到2- [2-(1- alkenylsulfanyl-1-烷氧基羰基-2-氨基)-1,2- dicyanovinylsulfanyl] - 4和-1,2- dicyanovinyldisulfanyl] -3-氨基-2-链烯酸烷基酯7在产率分别为16%至60%和8%至48%。