3-Nitro-2-substituted aminopyrroles are histamine H.sub.2 -receptor antagonists. The 2- position substituent is a fully-unsaturated heterocyclyl alkyl group preferably with alkyl group interrupted by sulfur or oxygen. The 4- and 5- positions of the pyrrole ring can also be substituted.
3-Nitro-2-substituted aminopyrroles are histamine H.sub.2 - receptor antagonists. The 2- position substituent is a fully-unsaturated heterocyclyl alkyl group preferably with alkyl group interrupted by sulfur or oxygen. The 4- and 5- positions of the pyrrole ring can also be substituted.
The 2,3-substituted pyrroles (4) have been prepared by a generalmethod by cyclization in cold ethereal HCl of the methylthio-amino-vinyl compounds (3), which were obtained by condensation of the ketendithioacetals (1) with 2,2-diethoxyethylamine (2).
3-Nitro-2-substituted aminopyrroles are histamine H.sub.2 -receptor antagonists. The 2-position substituent is a fully-unsaturated heterocyclyl alkyl group preferably with alkyl group interrupted by sulfur or oxygen. The 4- and 5-positions of the pyrrole ring can also be substituted.