Method for the preparation of 1,3-disubstituted 4,5-...

Details Method for the preparation of 1,3-disubstituted 4,5-... Method for the preparation of 1,3-disubstituted 4,5-...

C - Chemistry, Metallurgy

07

D

260/315.1

C07D 233/32 (2006.01)

Patent

CA 1180338

IMPROVED METHOD FOR THE PREPARATION OF 1,3-DISUBSTITUTED 4,5-CIS-DICARBOXY-2-IMIDAZOLIDONES Abstract of the Disclosure A process for the preparation 1,3-disubstituted 4,5-cis-dicarboxy-2-imidazolidones useful as intermediates in the preparation of Vitamin H (biotin), said intermediates have the general formula Image in which R is an aliphatic hydrocarbon radical having 1 to 8 carbon atoms, an aralkyl radical or an aromatic hydrocarbon radical, preferably an allyl radical or a benzyl radical, comprising reacting a defined diaminosuccinic acid with phosgene in the presence of an alkali metal hydroxide.

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