Synthesis of an Optically Active Al(salalen) Complex and Its Application to Catalytic Hydrophosphonylation of Aldehydes and Aldimines
作者:Bunnai Saito、Hiromichi Egami、Tsutomu Katsuki
DOI:10.1021/ja0651005
日期:2007.2.1
serve as an efficient catalyst for hydrophosphonylation of aldehydes and aldimines, giving the corresponding alpha-hydroxy and alpha-amino phosphonates with high enantioselectivity, respectively. The scope of the hydrophosphonylation was wide, and both aliphatic and aromatic aldehydes and aldimines were successfully used as substrates for the reaction. The potent catalysis of the complex is attributed to
An aluminum binaphthyl Schiff base complex was found to be an efficient catalyst for enantioselective hydrophosphonylation of aldehydes. High enantioselectivities were obtained in reactions of both aromatic and aliphatic aldehydes (up to 84% and 86% ee, respectively).
Asymmetric hydrogenation of α-keto phosphonates with chiral phosphine–phosphoramidite ligands
作者:Qing Li、Chuan-Jin Hou、Yan-Jun Liu、Rui-Feng Yang、Xiang-Ping Hu
DOI:10.1016/j.tetasy.2015.05.007
日期:2015.7
Rh-catalyzed asymmetrichydrogenation of challenging α-ketophosphonates has been developed. With a new chiral phosphine–phosphoramidite ligand, a wide range of α-ketophosphonates were hydrogenated to afford the corresponding (R)-α-hydroxy phosphonates with moderate to good enantioselectivities (up to 87% ee).
Enantioselective synthesis of α-hydroxy phosphonates via oxidation with (camphorsulfonyl)oxaziridines
作者:Diana M. Pogatchnik、David F. Wiemer
DOI:10.1016/s0040-4039(97)00705-3
日期:1997.5
Reaction of phosphonate anions with enantiomerically pure (camphorsulfonyl)oxaziridines results in formation of nonracemic alpha-hydroxy phosphonates. This enantioselective hydroxylation methodology provides convenient access to optically active alpha-hydroxy phosphonates and their corresponding phosphonic acids. (C) 1997 Elsevier Science Ltd.
Catalytic Asymmetric Synthesis of α-Hydroxy Phosphonates Using the Al−Li−BINOL Complex