henyl)methanone] were synthesized and used in anionic domino reactions with activated acetonitriles to yield thieno[3,2-e][1,2,3]triazolo[1,5-a]pyrimidines and/or 2-(5-amino-1H-1,2,3-triazol-1-yl)thiophenes. Finally, a new ring system of thieno[3,2-e]pyrazolo[1,5-a]pyrimidine was synthesized via a domino reaction of ethyl 2-[(2Z)-2-(1-chloro-2-ethoxy-2-oxoethylidene)hydrazino]-4,5,6,7-tetrahydro-1
为了合成
噻吩并
嘧啶,研究了 Gewald
噻吩中
氨基和羰基/腈基团的新转化。发现 2-
氨基-
噻吩-3-甲酰胺和 2-(乙酰
氨基)-
4,5,6,7-四氢-1-苯并噻吩-3-
羧酸乙酯不产生
四唑衍
生物,在反应中也不与
原甲酸三乙酯和
叠氮化
钠反应,也不与
三氯氧磷和
叠氮化
钠反应。相反,thieno[2,3-d]pyrimidin-4(3H)-one 和 thieno[2,3-d][1,3]oxazin-4-one 的衍
生物被分离出来。新的 2-azidothiophenes [2-azido-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonitrile 和 2-azido-4,5,6,7-tetrahydro-1-benzothiophen-3-yl(苯基)甲酮]被合成并用于与活化
乙腈的阴离子多米诺反应以产生
噻吩并[3,2-e][1,2,3]三唑并[1, 5-a]
嘧啶和/或2-(5-
氨基-1H-1