摘要:
A process is proposed for preparing creatine, creatine monohydrate or guanidinoacetic acid, wherein N-methylethanolamine or ethanolamine is first catalytically dehydrogenated, in each case in alkaline solution, and the sarcosinate or glycinate solutions thus obtained are finally reacted under acidic conditions with a guanylating agent, for example O-alkylisourea or cyanamide. In this way, products are obtained in high yields and very good purity, but, in contrast to the prior art, no traces whatsoever of hydrocyanic acid, formaldehyde, chloroacetic acid or ammonia are present. The formation of the toxicologically unsafe dihydrotriazine is also avoided.
摘要:
Die vorliegende Erfindung betrifft Guanidinverbindungen und insbesondere N,N' - Guanidinodiessigsäure. Die erfindungsgemäßen Verbindungen können insbesondere in einem Verfahren zur Herstellung von N-(Aminoiminomethyl)-2-aminoethansäure enthaltend N-(Aminoiminomethyl)-2-aminoethansäure in einer thermodynamisch metastabilen Kristallmodifikation eingesetzt werden.