[EN] PROCESS FOR THE MANUFACTURE OF N-ALKOXALYL-ALANINATES<br/>[FR] PROCEDE DE FABRICATION DE N-ALKOXALYL-ALANINATES
申请人:DSM IP ASSETS BV
公开号:WO2004087640A1
公开(公告)日:2004-10-14
A process for the manufacture of alkyl N-alkoxalyl-alaninates of the formula alkylO-CO-CO-NH-CH(CH3)-CO-Oalkyl comprises reacting alanine with a dialkyl oxalate under substantially non-acidic conditions, which may be created by carrying out the reaction in the presence of a base. The reaction may furthermore be carried out in the presence of added alkanol, preferably one featuring the alkyl group corresponding to that of the employed dialkyl oxalate. The monoesters N-alkoxalyl-alanine of the formula alkylO-CO-CO-NH-CH(CH3)-COOH, which as intermediates in the process can be isolated therefrom, are novel and as such are also an object of the present invention. The alkyl N-alkoxalylalaninates are useful intermediates in the multistep process for the manufacture of vitamin B6.
presence of templating tetramethylammonium counter-cations, disassemble in the presence of cationic square-planar [Ni(cyclam)]2+ complexes to yield, after a supramolecular reorganization process that involves axial coordination of the [Ni(cyclam)]2+ cations through the free carbonyl groups of the copper(II) moieties, a neutral chiral rod-like, three-dimensional (3D) MOF with formula [Ni(cyclam)][Cu(S)-alama]2·16H2O