The asymmetric synthesis of phosphorus- and sulfur-containing tricarbonyl(η6-arene)chromium complexes using the chiral base approach
作者:Azhar Ariffin、Alexander J. Blake、Richard A. Ewin、Wan-Sheung Li、Nigel S. Simpkins
DOI:10.1039/a905610f
日期:——
transformation of tricarbonyl[η6-(diphenylphosphinoyl)benzene]chromium(0) 12 into the corresponding ortho-silylated complex in up to 86% ee. A tin derivative was prepared similarly and was then used to prepare other derivatives via reduction to the corresponding phosphine, followed by transmetallation–electrophilic quench. In the case of tricarbonyl(η6-1,3-dihydroisobenzothiophene)chromium(0) the chiral
使用简单的手性氨基化锂基体2的三羰基能够的不对称转变〔η 6 - (diphenylphosphinoyl)苯]铬(0)12成相应的邻-silylated在高达86%ee的复合物。锡衍生物的制备方法相似,然后通过还原为相应的膦,然后再进行金属转移-亲电淬灭,用于制备其他衍生物。在三羰基(η6 -1,3-二氢异苯并噻吩)铬(0)手性碱2无效,必须使用双锂酰胺碱9才能在高ee(最高达95%)中实现不对称取代。分解得到高度对映体富集形式的相应手性硫化物。在所有情况下,都是通过对选定的实例进行X射线结构测定得出产品的绝对立体化学。