[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.
Novel inhibitors of prolyl 4-hydroxylase. 3. Inhibition by the substrate analog N-oxaloglycine and its derivatives
作者:C. Jane Cunliffe、Trevor J. Franklin、Neil J. Hales、George B. Hill
DOI:10.1021/jm00092a016
日期:1992.7
N-Oxaloglycine (3) is an alpha-ketoglutarate (1) analogue that is a competitive inhibitor of prolyl 4-hydroxylase (EC 1.14.11.2). A study of the structure-activity relationships of some other oxalo derivatives shows that substitution on the glycine moiety modulates activity stereoselectively and that if the omega-carboxylate is homologated or replaced by either acylsulfonamides or anilide, then activity is sharply reduced. This sensitivity to these changes is contrasted with the relative insensitivity of another putative alpha-ketoglutarate analogue, pyridine-2,5-dicarboxylic acid (2), and the implication is discussed that compounds of both series are unlikely to bind to prolyl hydroxylase in the same way even though both inhibit the enzyme competitively.