New phosphine oxide aziridinyl phosphonates as chiral Lewis bases for the Abramov-type phosphonylation of aldehydes
作者:Özdemir Dogan、Muhammet Isci、Muhittin Aygun
DOI:10.1016/j.tetasy.2013.04.005
日期:2013.5
A series of Lewis bases were screened for Abramov-type phosphine additions to aldehydes. A novel phosphine oxide aziridinyl phosphonate POAP-A was found to be better than the others in forming the product in 96% yield and with 42% ee. The absolute configuration of the newly synthesized POAP Lewis bases was determined by single-crystal X-ray analysis. (C) 2013 Elsevier Ltd. All rights reserved.
Bis(oxazoline)-copper catalyzed enantioselective hydrophosphonylation of aldehydes
作者:Tao Deng、Chun Cai
DOI:10.1039/c4ra03269a
日期:——
A highly enantioselective copper-catalyzed hydrophosphonylation of aldehydes in the presence of bis(oxazoline) ligand is presented. The reaction proceeded smoothly under mild conditions. The resulting α-hydroxyphosphonates were obtained with high yields as well as enantioselectivities (up to 98% ee).