P-Chiral Monodentate Diamidophosphites− New and Efficient Ligands for Palladium-Catalysed Asymmetric Allylic Substitution
作者:Vasily N. Tsarev、Sergey E. Lyubimov、Alexei A. Shiryaev、Sergey V. Zheglov、Oleg G. Bondarev、Vadim A. Davankov、Anzhelika A. Kabro、Sergey K. Moiseev、Valery N. Kalinin、Konstantin N. Gavrilov
DOI:10.1002/ejoc.200300694
日期:2004.5
Novel P*-monodentate diamidophosphite ligands have been prepared by a one-step phosphorylation of alcohols or amines. Both the electronic and the steric demands of the ligands have been estimated quantitatively. Neutral [Pd(allyl)Cl(L)] and cationic [Pd(allyl)(L)2]+ BF4− complexes have been obtained by starting from [Pd(allyl)Cl]2. The new ligands have demonstrated high enantioselectivity in the Pd-catalysed
通过醇或胺的一步磷酸化制备了新型 P*-单齿二酰氨基亚磷酸酯配体。已经定量估计了配体的电子和空间需求。中性 [Pd(allyl)Cl(L)] 和阳离子 [Pd(allyl)(L)2]+ BF4− 复合物已通过从 [Pd(allyl)Cl]2 开始获得。新配体在钯催化的 1,3-二苯基烯丙基乙酸酯与 NaSO2pTol(高达 97% ee)、PhCH2NH2(高达 95% ee)和 CH2(CO2Me)2(高达 97 % ee)。P*-单齿二酰氨基亚磷酸酯在手性碳硼烷衍生物的不对称催化合成中的应用也已得到证实。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)