作者:Éric Godin、Sacha Nguyen Thanh、Javier Guerrero‐Morales、Jeffrey Santandrea、Antoine Caron、Clémentine Minozzi、Noémie Beaucage、Bastien Rey、Mathieu Morency、Xavier Abel‐Snape、Shawn K. Collins
DOI:10.1002/chem.202003655
日期:2020.11.17
The synthesis of rare macrocyclic alkynediyl sulfides by a Cu‐catalyzed Csp−S cross‐coupling is presented. The catalytic protocol (Cu(MeCN)4PF6/dtbbpy) promotes macrocyclization of peptides, dipeptides and tripeptides at ambient temperature (14 examples, 23→73 % yields) via thiols and bromoalkynes, and is chemoselective with regards to terminal alkynes. Importantly, the underexplored alkynediyl sulfide
提出了通过铜催化的C sp -S交叉偶联合成稀有的大环炔基硫醚。催化方案(Cu(MeCN)4 PF 6 / dtbbpy)促进了肽,二肽和三肽在环境温度下(14例,23→73%的收率)经由巯基和溴炔烃的大环化,对末端炔烃具有化学选择性。重要的是,未充分开发的炔二硫醚官能团结合了刚性结构元素,并通过S氧化,卤化物加成和叠氮化物-炔烃环加成化学方法整合了砜,卤化物或有价值的荧光团,为大环骨架的多样化开辟了新机遇(7例,产率37→92% )。