Pudowik et al., Zhurnal Obshchei Khimii, 1959, vol. 29, p. 4019; engl.Ausg.S.3977
作者:Pudowik et al.
DOI:——
日期:——
Organocatalytic Enantioselective Synthesis of Both Diastereomers of α-Hydroxyphosphinates
作者:Sampak Samanta、Sandun Perera、Cong-Gui Zhao
DOI:10.1021/jo9022099
日期:2010.2.19
Racemic alpha-acylphosphinates and formylphosphinate hydrate were used directly as the substrates in a proline derivative-catalyzed cross aldol reaction with ketones. Because of the preexisting phosphorus stereogenic center, a mixture of two diastereomers of the corresponding alpha-hydroxyphosphinates was obtained in this reaction. Good to high enantioselectivities (up to 99% ee) were obtained simultaneously for the two diastereomers in good yields. Good diastereoselectivities were also obtained when the reaction generates an additional carbon stereogenic center.
Iliopulos,M.I., Chemische Berichte, 1966, vol. 99, p. 2410 - 2412
作者:Iliopulos,M.I.
DOI:——
日期:——
Chiral α-Amino Phosphonates via Rhodium-Catalyzed Asymmetric 1,4-Addition Reactions
A new approach for the preparation of enantioenriched α-amino phosphonates and derivatives is described. Indeed, the rhodium-catalyzed asymmetric 1,4-addition of potassium organotrifluoroborates to dehydroaminophosphonates afforded α-amino phosphonates in good yields and high enantioselectivities (up to 96%) using Difluorphos as a chiral ligand.