Louie Janis, Gibby John E, Farnworth Marc V, Tekavec Thomas N
Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, USA.
J Am Chem Soc. 2002 Dec 25;124(51):15188-9. doi: 10.1021/ja027438e.
A mild and general route for preparing 2-pyrones from CO2 and diynes is described. Under only 1 atm of CO2, excellent yields of pyrone are obtained using catalytic amounts of Ni(COD)2 and imidazolylidene ligand, IPr. In addition, stoichiometric reactions between the isolated complex Ni(IPr)2, diynes, and CO2 suggest that the pathway involves initial reaction with CO2 as the key step.
描述了一种从二氧化碳和二炔制备2-吡喃酮的温和通用方法。在仅1个大气压的二氧化碳下，使用催化量的Ni(COD)2和咪唑亚基配体IPr可获得优异产率的吡喃酮。此外，分离出的配合物Ni(IPr)2、二炔和二氧化碳之间的化学计量反应表明，该途径涉及与二氧化碳的初始反应作为关键步骤。
