[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.
一种制备公式为alkylO-CO-CO-NH-CH(CH3)-CO-Oalkyl的烷基N-烷氧基丙氨酸酯的方法,包括在基本非酸性条件下,将丙氨酸与二烷基草酸酯反应,这可以通过在碱存在下进行反应来实现。此外,反应可以在添加的脂肪醇存在下进行,最好是具有所使用的二烷基草酸酯相应的烷基基团的脂肪醇。公式为alkylO-CO-CO-NH-CH(CH3)-COOH的单酯N-烷氧基丙氨酸是该过程的中间体,可以从中分离出来,是新颖的,因此也是本发明的对象。烷基N-烷氧基丙氨酸酯是制备维生素B6的多步过程中有用的中间体。