Etude par la modélisation moléculaire de la régiosélectivité de l'Ouverture des acides glycidiques par les amines aliphatiques
作者:F. Grosjean、M. Huché、M. Larchevêque、J.J. Legendre、Y. Petit
DOI:10.1016/s0040-4020(01)85509-5
日期:——
A model for glycidic acids opening reaction by ammonia and amines has been suggested from semi-empiric orbital calculations. It provides a way for evaluating the different interactions between the incoming nucleophile and the oxirane substituents. Steric and coulombic interactions of the carboxylate in staggered conformation (cis substitution) has a major influence to rationalize experimental regioselectivity
Synthese von ?D-Isothreonin? und ?L-Alloisothreonin? ausL-Alanin
作者:Jean-Pierre Wolf、Hanspeter Pfander
DOI:10.1002/hlca.19870700113
日期:1987.2.4
Synthesis of ‘D-Isothreonine’ and ‘L-Alloisothreonine’ Starting from L-Alanine
从L-丙氨酸开始合成'D-异苏氨酸'和'L-异苏氨酸'
Stereoselective cyanation of chiral α-amino aldehydes by reaction with Nagata's reagent: a route to enantiopure β-amino-α-hydroxy acids
作者:José M. Andrés、Marı́a A. Martı́nez、Rafael Pedrosa、Alfonso Pérez-Encabo
DOI:10.1016/s0957-4166(01)00044-1
日期:2001.2
Chiral alpha -dibenzylamino aldehydes react with diethylaluminum cyanide leading to anti-beta -dibenzylamino-alpha -hydroxy-cyanides as the major diastereoisomers in good yields and diastereomeric excesses. Hydrolysis of the nitrile derivatives allows the synthesis of enantiopure beta -amino-alpha -hydroxy acids. (C) 2001 Elsevier Science Ltd. All rights reserved.
First One<i>-</i>Pot Copper-Catalyzed Synthesis of α-Hydroxy-β-Amino Acids in Water. A New Protocol for Preparation of Optically Active Norstatines
alpha-Hydroxy-beta-amino acids were synthesized with excellent yields for the first time in water and by a simple procedure based on a copper catalytic cycle, which included the recovery and reuse of the catalyst and is possible to realize by using only water as reaction medium.
Synthesis of All Four Stereoisomers of 3-Amino-2-hydroxybutanoic Acids
作者:Jin Hwan LEE、Min Suk YANG、Kuy Young KANG、Yea Hwang MOON、Ki Hun PARK
DOI:10.1271/bbb.68.714
日期:2004.1
All fourstereoisomers of 3-amino-2-hydroxybutanoic acids were been obtained as single enantiomers via stereospecific reactions from D-gulonic acid gamma-lactone and D-glucono-delta-lactone.