N-Cyano-N'-alkynyl-N''-(2-mercaptoethyl)guanidines and S-substituted N-alkynyl-N'-cyanoisothioureas

摘要

A description is given of the novel compounds of the formulae IV and VIII. R1 denotes straight or branched C3-9-alkynyl and R is a substituent which forms, with S, a group which can be eliminated. The compounds are used as intermediates in the preparation of novel histamine H2 receptor antagonists. IMAGE