A formal [4 + 3]-annulation of vinyl arenes and diynyl propargyl esters is described. A mechanism involving cationic phosphinegold(I)-catalyzed tandem cyclopropanation/hydroarylation to produce the benzonorcaradiene products is proposed. In accord with this mechanism, the alkynyl cyclopropane can also be prepared with excellent regio- and diastereocontrol.
描述了
乙烯基芳烃和二炔基炔
丙酯的正式 [4 + 3]-环化。提出了一种涉及阳离子膦
金(I)催化串联
环丙烷化/加氢芳基化以生产苯并降碳二烯产品的机制。根据该机理,炔基
环丙烷也可以制备具有优异的区域和非对映控制。