[EN] CATALYTIC ASYMMETRIC SYNTHESIS OF PRIMARY AMINES VIA BORANE REDUCTION OF OXIME ETHERS USING SPIROBORATE ESTERS [FR] SYNTHÈSE ASYMÉTRIQUE CATALYTIQUE D'AMINES PRIMAIRES PAR RÉDUCTION AU BORANE D'ÉTHERS D'OXIME AU MOYEN D'ESTERS DE SPIROBORATE
Synthesis of <i>N</i>-alkoxy amines and hydroxylamines <i>via</i> the iridium-catalyzed transfer hydrogenation of oximes
作者:Yanping Xia、Sen Wang、Rui Miao、Jianhua Liao、Lu Ouyang、Renshi Luo
DOI:10.1039/d2ob01084d
日期:——
hydrogenation of oximes to access N-alkoxy amines and hydroxylamines, and the reaction was accelerated by trifluoroacetic acid. The practical application of this protocol was demonstrated by a gram-scale transformation and two-step synthesis of the fungicide furmecyclox (BAS 389F) in overall yields of 92 and 85%, respectively. An asymmetric protocol using chiral Ir complexes to afford chiral N-alkoxy amines was
Asymmetric reduction of ketoxime derivatives and N-alkylketimines with borane–oxazaborolidine adducts
作者:Marek P. Krzemiński、Marek Zaidlewicz
DOI:10.1016/s0957-4166(03)00314-8
日期:2003.6
Oxime ethers of acetophenone, isopropyl methyl ketone, and tert-butyl methyl ketone were reduced to the corresponding hydroxylamine ethers of 45-94% ee with borane-oxazaborolidine 1 derived from (-)-norephedrine. A one-pot reduction of acetophenone oxime with 1 to 1-phenylethylhydroxylamine of 87% ee is described. The reduction of 6-methyl-2,3,4,5-tetrahydropyridine and N-methylimines of the above mentioned ketones with borane-B-methyloxazaborolidine adduct 2, derived from (-)-diphenylprolinol, gave the corresponding amines of 40-74% ee. (C) 2003 Elsevier Science Ltd. All rights reserved.
[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