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
The Synthetic Reactions of Aliphatic Nitro Compounds. XI. The Synthesis of β-Amino-α-hydroxycarboxylic Acids and γ-Aminocarboxylic Acids
作者:Eisuke Kaji、Akira Igarashi、Shonosuke Zen
DOI:10.1246/bcsj.49.3181
日期:1976.11
The O-alkylation of some nitroparaffins, 2-nitropropane, 2-nitrobutane, 1-nitropropane, and phenylnitromethane, with methyl bromoacetate in dipolar aprotic solvent led to α-hydroxy-β-nitrocarboxylates, which were converted into β-amino-α-hydroxycarboxylic acids. Several γ-aminocarboxylic acids were synthesized from the corresponding γ-nitrocarboxylates which were obtained via C-alkylation of the nitroparaffins
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.