The reaction of N-benzyl alpha-amino acid ethyl esters with ethylmagnesium bromide in the presence of a catalytic amount of titanium tetraisopropoxide leads to formation of the corresponding 1-aminoalkyl-1-cyclopropanols in high yields. Hydrogenation of the latter over palladium catalyst ensures selective removal of one or two protecting benzyl groups from the nitrogen atom.
Conjugated imines and iminium salts as versatile acceptors of nucleophiles
作者:Makoto Shimizu、Iwao Hachiya、Isao Mizota
DOI:10.1039/b814930e
日期:——
development of synthetic methodologies where nucleophilicaddition reactions to imino carbons are utilized in crucial steps. This article summarizes double nucleophilicaddition reactions with alpha,beta-unsaturated aldimines, addition reactions using alkynyl imines, "umpoled" reactions of alpha-imino esters, and the use of iminium salts as reactive electrophiles.
COMPOUNDS WITH ANTIPARASITIC ACTIVITY, APPLICATIONS THEREOF TO THE TREATMENT OF INFECTIOUS DISEASES CAUSED BY APICOMPLEXANS
申请人:Commissariat à l'Energie Atomique
公开号:EP2155676A2
公开(公告)日:2010-02-24
[EN] COMPOUNDS WITH ANTIPARASITIC ACTIVITY, APPLICATIONS THEREOF TO THE TREATMENT OF INFECTIOUS DISEASES CAUSED BY APICOMPLEXANS<br/>[FR] COMPOSÉS PRÉSENTANT UNE ACTIVITÉ ANTIPARASITAIRE, LEURS APPLICATIONS AU TRAITEMENT DE MALADIES INFECTIEUSES PROVOQUÉES PAR DES APICOMPLEXANS
申请人:COMMISSARIAT ENERGIE ATOMIQUE
公开号:WO2008146172A2
公开(公告)日:2008-12-04
[EN] The Invention relates to compounds having an antiparasitic activity, and to their use as a drug, in particular as a drug for the prevention and/or treatment of parasitic diseases caused by apicomplexans. The invention also relates to pharmaceutical compositions containing those compounds. [FR] L'invention porte sur des composés ayant une activité antiparasitaire, et sur leur utilisation en tant que médicament, en particulier en tant que médicament pour la prévention et/ou le traitement de maladies parasitaires provoquées par des apicomplexans. L'invention également sur des compositions pharmaceutiques contenant ces composés.
A New Synthetic Method for α-Alkoxycarbonyl Iminium Salt and Its Reaction with Nucleophiles
作者:Makoto Shimizu、Hiroyuki Itou、Megumi Miura
DOI:10.1021/ja042330f
日期:2005.3.1
An iminium salt was easily prepared using the oxidation of amino ketene silyl acetal with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, and the subsequent nucleophilic addition to this iminium species proceeded efficiently to afford alpha-amino esters in good yields.
The reaction of N-benzyl alpha-amino acid ethyl esters with ethylmagnesium bromide in the presence of a catalytic amount of titanium tetraisopropoxide leads to formation of the corresponding 1-aminoalkyl-1-cyclopropanols in high yields. Hydrogenation of the latter over palladium catalyst ensures selective removal of one or two protecting benzyl groups from the nitrogen atom.