Diastereoselective reduction of β-ketophosphonates derived from amino acids. A new entry to enantiopure β-hydroxy-γ-aminophosphonate derivatives
摘要:
The reduction of gamma-N,N-dibenzylamino-beta-ketophosphonates 4 derived from readily available (S)-tribenzylated amino acids teas achieved with catecholborane at -20degreesC affording gamma-amino-beta-hydroxyphosphonates 5 in high diastereoselectivity and good chemical yield. These reactions provide a new entry to enantiomerically pure gamma-amino-beta-hydroxyphosphonates. (C) 2002 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of β-amino alcohols: diastereoselective reduction of chiral α′-amino enones derived from amino acids
作者:Sung-Kee Chung、Dong-Ho Kang
DOI:10.1016/s0957-4166(97)00374-1
日期:1997.9
alpha-Amino acids are doubly benzylated at nitrogen to give N,N-dibenzyl amino adds, which can readily be converted to alpha'-amino enones 3. The alpha'-amino enones are very resistant to racemization, and undergo highly diastereoselective reduction to afford chiral amino alcohols upon treatment with L-Selectride under non-chelation control. (C) 1997 Elsevier Science Ltd.
Remote asymmetric induction in organocopper conjugate additions to 3-ketoacrylates
作者:Laura F. Captain、Xiaoyang Xia、Dennis C. Liotta
DOI:10.1016/0040-4039(96)00828-3
日期:1996.6
Remote asymmetricinduction has been achieved in the conjugate addition of organocopper reagents to a novel 3-ketoacrylate system, 1. Conjugate additions proceed in moderate to good yield and with high regio- and stereoselectivity in the presence of diethylaluminum chloride.
Diastereoselective reduction of β-ketophosphonates derived from amino acids. A new entry to enantiopure β-hydroxy-γ-aminophosphonate derivatives
作者:Mario Ordóñez、Ricardo de la Cruz、Mario Fernández-Zertuche、Miguel-Ángel Muñoz-Hernández
DOI:10.1016/s0957-4166(02)00159-3
日期:2002.4
The reduction of gamma-N,N-dibenzylamino-beta-ketophosphonates 4 derived from readily available (S)-tribenzylated amino acids teas achieved with catecholborane at -20degreesC affording gamma-amino-beta-hydroxyphosphonates 5 in high diastereoselectivity and good chemical yield. These reactions provide a new entry to enantiomerically pure gamma-amino-beta-hydroxyphosphonates. (C) 2002 Elsevier Science Ltd. All rights reserved.