One-Pot Synthesis of 2,5-Dihydropyrroles from Terminal Alkynes, Azides, and Propargylic Alcohols by Relay Actions of Copper, Rhodium, and Gold
作者:Tomoya Miura、Takamasa Tanaka、Kohei Matsumoto、Masahiro Murakami
DOI:10.1002/chem.201405357
日期:2014.12.1
of copper, rhodium, and gold formulate a one‐pot multistep pathway, which directly gives 2,5‐dihydropyrroles starting from terminal alkynes, sulfonyl azides, and propargylic alcohols. Initially, copper‐catalyzed 1,3‐dipolar cycloaddition of terminal alkynes with sulfonyl azides affords 1‐sulfonyl‐1,2,3‐triazoles, which then react with propargylic alcohols under the catalysis of rhodium. The resulting
铜,铑和金的接力作用形成了一个单步多步路径,该路径直接从末端炔烃,磺酰叠氮化物和炔丙醇开始生成2,5-二氢吡咯。最初,末端炔烃与磺酰叠氮化物的铜催化1,3-偶极环加成反应生成1-磺酰基-1,2,3-三唑,然后在铑的催化下与炔丙醇反应。所得的烯基炔丙基醚随后进行热克莱森重排,得到α-烯基-α-氨基酮。最后,金催化剂提示5-内的环化,以产生2,5-二氢吡咯。