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US09108925B2 Process for the manufacture of a precursor of vitamin B1 有权
制造维生素B1前体的方法

Process for the manufacture of a precursor of vitamin B1
摘要:
The present invention relates to a novel process for the manufacture of Grewe-diamine comprising the following step: hydrolyzing a compound of formula (II), wherein R is hydrogen or straight- or branched chain C1-4 alkyl, with an aqueous alkali or alkaline-earth metal hydroxide solution, characterized in that the hydrolysis is carried out in the presence of an organic solvent.
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