Intermediates useful in the preparation of fused aromatic oxazepinones, thiazepinones, diazepinones and sulfur analogs thereof

Abstract

Chemical intermediates having the formula: ##STR1## wherein A represents an aromatic or heterocyclic ring system selected from benzene, a naphthalene, a quinoline or a pyridine in any of its four positions, any of the rings systems are optionally substituted by one or two Y radicals selected from the group consisting of halo, loweralkyl, loweralkoxy, diloweralkylamino, nitro or trifluoromethyl; R is selected from the group consisting of loweralkyl, cycloalkyl or phenylloweralkyl wherein phenyl is optionally substituted by one or two radicals selected from halo, loweralkyl, loweralkoxy, nitro or trifluoromethyl; R.sup.4 and R.sup.5 are selected from hydrogen or loweralkyl; n is 1 or 2; X is selected from chlorine, bromine, or fluorine and E is selected from sulfur, oxygen or ##STR2## and chemical intermediates having the formula: ##STR3## wherein A, R, R.sup.4, R.sup.5, E and n are as defined above and Q is selected from the group consisting of ##STR4## wherein R.sup.3 is hydrogen, an acid neutralizing ion or an esterifying radical; with the proviso that when n is 2 and E is oxygen, A is other than phenyl or substituted phenyl. These chemical intermediates are useful in the preparation of oxazepinones, thiazepinones and diazepinones which exhibit antihistaminic activity.

Dependencies are inferred from the claim text.