Abstract:
Products of formula (I): ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent: --a hydrogen atom, a halogen atom, one of the following radicals: hydroxyl, mercapto, cyano, nitro, sulpho, formyl, benzoyl, acyl, carboxy, cycloalkyl, acyloxy, --an alkyl, alkenyl, alkynyl, alkyloxy or alkythio radical, --an alkyl, alkenyl, alkynyl, alkyloxy or alkylthio radical, --an aryl, arylalkyl, arylalkenyl, aryloxy or arylthio radical, --a radical: ##STR2## --a--(CH.sub.2).sub.m1 --S(O).sub.m2 --Z'--R'.sub.14 radical in which m1 represents an integer from 0 to 4, m2 represents an integer from 0 to 2, R.sub.5 represents a divalent alkylene radical, Y represents the --Y.sub.1 --B--Y.sub.2 radical. These products have useful pharmacological properties, which justify their use as medicaments.