[EN] A NEW SYNTHESIS FOR THE PREPARATION OF PORPHOBILINOGEN AND THE COMPOUND AS SUCH AS STABILIZED SALT AND INTERMEDIATES THEREOF<br/>[FR] NOUVELLE SYNTHESE POUR LA PREPARATION DE PORPHOBILINOGENE ET COMPOSE EN TANT QUE SEL STABILISE ET SES INTERMEDIAIRES
申请人:NEIER REINHARD
公开号:WO2003091210A1
公开(公告)日:2003-11-06
The invention relates to a new inventive process sequence of steps (a) to (e) as claimed in Claim 1 for the preparation of porphobilinogen and intermediates per se as important precursors such as 3-[4-methoxycarbonylmethyl-5-(protected amino-methyl)-1H-pyrrol-3-yl]-propionic acid methyl ester of formula 7 wherein R is phenylacetyl group, and 3-[4-Carboxymethyl-5-(protected amino-methyl)-1H-pyrrol-3-yl]-propionic acid di-alkali metal salt of formula 8 and especially 3-[4-carboxymethyl-5-(phenylacetyl-amino-methyl)-1H-pyrrol-3-yl]-propionic acid di-lithium salt of formula 8a.