The regioselective synthesis of isomeric 5(3)‐aminomethyl‐3(5)‐phenyl isoxazoles using different methods is described. Spectroscopic data, especially mass spectrometric fragmentation, were used to identify and characterize the regioisomers. The muscarinicactivity of these isoxazoles was assayed on isolated guinea‐pig ileum and atria as well as on isolated rabbit vas deferens.
[EN] CATALYTIC ASYMMETRIC SYNTHESIS OF PRIMARY AMINES VIA BORANE REDUCTION OF OXIME ETHERS USING SPIROBORATE ESTERS<br/>[FR] SYNTHÈSE ASYMÉTRIQUE CATALYTIQUE D'AMINES PRIMAIRES PAR RÉDUCTION AU BORANE D'ÉTHERS D'OXIME AU MOYEN D'ESTERS DE SPIROBORATE
申请人:INTELLECTUAL PROPERTY AND TECH
公开号:WO2008027740A3
公开(公告)日:2008-05-22
Asymmetric Synthesis of Primary Amines via the Spiroborate-Catalyzed Borane Reduction of Oxime Ethers
作者:Xiaogen Huang、Margarita Ortiz-Marciales、Kun Huang、Viatcheslav Stepanenko、Francisco G. Merced、Angel M. Ayala、Wildeliz Correa、Melvin De Jesús
DOI:10.1021/ol0704791
日期:2007.4.1
enantioselective borane reduction of O-benzyloxime ethers to primary amines was studied under catalytic conditions using the spiroborate esters 5-10 derived from nonracemic 1,2-amino alcohols and ethylene glycol. Effective catalytic conditions were achieved using only 10% of catalyst 5 derived from diphenylvalinol in dioxane at 0 degrees C resulting in complete conversion to the corresponding primary amine in