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US4049671A Process for preparing N-cyanoguanidines 失效
N-氰基胍的制备方法

Process for preparing N-cyanoguanidines
摘要:
Process for preparing N-cyanoguanidines by treating N-(loweralkyl)-N'-cyano-isothioureas with an amine and a heavy metal salt. A specific product is N-cyano-N'-methyl-N"-[2-((5-methyl-4-imidazolyl)methylthio)ethyl]guanidine, useful as a histamine H.sub.2 -antagonist.
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