Gold(I)-Catalyzed Addition of Diphenyl Phosphate to Alkynes: Isomerization of Kinetic Enol Phosphates to the Thermodynamically Favored Isomers
作者:Phil Ho Lee、Sundae Kim、Aeri Park、Bathoju Chandra Chary、Sunggak Kim
DOI:10.1002/anie.201001799
日期:2010.9.10
Gold, gold, or …︁ gold? It depends on the (gold) catalyst whether the product of thermodynamic or kinetic control is formed in an unprecedented hydrophosphoryloxylation approach to enolphosphates (see scheme). A third catalyst, [(C6F5)3PAuOTf], was found to be exceedingly effective for the previously unknown isomerization of kineticenolphosphates to the thermodynamicallyfavoredisomers. Tf=tri
黄金,黄金还是…︁黄金?是否以空前的烯醇磷酸盐加氢磷酰氧基化方法形成热力学或动力学控制产物取决于(金)催化剂(参见方案)。发现第三种催化剂[(C 6 F 5)3 PAuOTf]对于动力学烯醇磷酸酯到热力学上有利的异构体的以前未知的异构化非常有效。Tf =三氟甲磺酰基;R =烷基,环己基,Ph。
Gold(I)-Catalyzed Stereoselective Synthesis of Alkenyl Phosphates by Hydrophosphoryloxylation
作者:Pierrick Nun、Jonathan D. Egbert、María-José Oliva-Madrid、Steven P. Nolan
DOI:10.1002/chem.201103304
日期:2012.1.23
A pinch of gold will do: Alkenylphosphates, useful substrates in many cross‐coupling reactions, can be synthesized by gold‐catalyzed hydrophosphoryloxylation of terminal alkynes. The use of [Au(IPr)(OH)] as a pre‐catalyst in a silver‐free protocol permits low catalyst loadings and yields excellent results in terms of selectivity toward the kinetic product (see scheme).