Design of Axially Chiral Dicarboxylic Acid for Asymmetric Mannich Reaction of Arylaldehyde <i>N</i>-Boc Imines and Diazo Compounds
作者:Takuya Hashimoto、Keiji Maruoka
DOI:10.1021/ja0713375
日期:2007.8.1
An axially chiral dicarboxylic acid has been prepared as a new class of chiral hydrogen-bonding catalysts and applied to the highly enantioselective Mannichreaction of arylaldehyde N-Boc imines and diazo compounds.
A highly efficient asymmetric synthesis of β-aminophosphonic acids, via addition of α-phosphonate carbanions to chiral, enantiopure sulfinimines
作者:Marian Mikołajczyk、Piotr Łyżwa、Józef Drabowicz、Michał W. Wieczorek、Jarosław Błaszczyk
DOI:10.1039/cc9960001503
日期:——
Addition of alpha-phosphonate carbanions to (S)-sulfinimines 1 affords N-sulfinyl beta-aminophosphonates 2 in a diastereoisomeric ratio from 5:1 to 10:1; the major diastereoisomers of 2, after separation, are converted to the corresponding beta-aminophosphonates 3 or to (+)-beta-amino-beta-phenylethane phosphonic acid 4, whose absolute configuration was established as (R) by X-ray crystallography.
Mikolajczyk, Marian; Lyzwa, Piotr; Drabowicz, Jozef, Phosphorus, Sulfur and Silicon and the Related Elements, 1997, vol. 120, p. 357 - 358
作者:Mikolajczyk, Marian、Lyzwa, Piotr、Drabowicz, Jozef
DOI:——
日期:——
A Facile Synthesis of Optically Active ?-Amino-?-arylethylphosphonates by Mitsunobu Reaction
作者:Chengfu Xu、Chengye Yuan
DOI:10.1002/ejoc.200400420
日期:2004.11
We describe a convenient and simple synthesis of opticallyactive β -amino-β-arylethylphosphonates based on Mitsunobe reactions of chiral β-aryl-β-hydroxyethylphosphonates, prepared in turn by Candida rugosa lipase catayzed kinetic resolution of the corresponding racemates.