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US 4,374,996 AGranted
Disulfide intermediate for cimetidine
AssigneeSK&F Lab Co.
InventorsClifford S. Labaw, George R. Wellman
Life of this patent
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Abstract
A process for preparing cimetidine by sulfur extrusion from N-cyano-N'-methyl-N"-[2-(5-methyl-4-imidazolylmethyldithio)ethyl]guanidine .
Claims1
N-cyano-N'-methy l-N"-[2-(5-methyl-4-imidazolylmethyldithio)ethyl]guanidine.
Dependencies are inferred from the claim text.