sequential treatment of an acetylide with a Fischercarbenecomplex and an alkene/diene yields alkynylcyclopropanes with a wide substitution range. The intramolecular process provides 1‐alkynylbicyclo[3.1.0]cyclohexanes by starting from 1,6‐enynes. A non‐heteroatom‐stabilized metal alkynylcarbene is responsible for the selectivetransfer of the propargylene unit.
Gold-Catalyzed Functionalization of Unactivated C(sp<sup>3</sup>)H Bonds by Hydride Transfer Facilitated by Alkynylspirocyclopropanes
作者:José Barluenga、Rita Sigüeiro、Rubén Vicente、Alfredo Ballesteros、Miguel Tomás、Miguel A. Rodríguez
DOI:10.1002/anie.201205051
日期:2012.10.8
Golden Gate: Alkynylspirocyclopropanes served as a template for the development of gold‐catalyzed hydridetransfer from unactivatedC(sp3)Hbonds to electronically neutral alkynes. A variety of interesting carbocyclic structures can be accessed selectively with the appropriate choice of the reaction conditions. Mechanistic studies support a sequential gold‐catalyzed cleavage of CH and CCbonds.
金门奖:炔基螺环丙烷是开发金催化氢化物从未活化的C(sp 3)H键转移至电子中性炔烃的模板。各种有趣的碳环结构可以选择性地与反应条件的适当选择来访问。机制研究支持℃的顺序金催化裂解 H和13 C C键。