N-substituted o-phenylenediamines, sulfonyl azides and terminal alkynes. Particularly, the intermediate N-sulfonylketenimine occurred with two nucleophilic addition and the sulfonyl group was eliminated via cyclization. In a way, sulfonyl azides and copper catalysts activated the terminal alkynes to synthesize benzimidazoles.
通过简单搅拌
铜催化剂、 N-取代的
邻苯二胺、磺酰
叠氮化物和末端
炔烃的混合物来制备1,2-取代的
苯并咪唑。特别是,中间体N-磺酰基烯酮
亚胺发生两次亲核加成,并通过环化消除磺酰基。在某种程度上,磺酰
叠氮化物和
铜催化剂活化末端
炔烃以合成
苯并咪唑。