Antihypertensive chroman derivatives

Abstract From the Canadian patent

Compounds of formula (I):, ( I ) wherein:, either one of R1 and R2 is hydrogen and the other is selected from the class of C1-6 alkylcarbonyl C1-6 alkoxycarbonyl, C1-6 alkylcarbonyloxy C1-6 alkylhydroxymethyl, nitro, cyano, chloro trifluoromethyl, C1-6 alkylsulphinyl, C1-6 alkylsulphonyl C1-6 alkoxysulphinyl, C1-6 alkoxysulphonyl C1-6 alkylcarbonylamino, C1-6 alkoxycarbonylamino C1-6 alkyl-thiocarbonyl, C1-6 alkoxy-thiocarbonyl C1-6 alkyl-thiocarbonyloxy, 1-mercapto C2-7 alkyl formyl, or aminosulphinyl, aminosulphonyl or aminocarbonyl the amino moiety being, optionally substituted by one or two C1-6 alkyl groups or C1-6 alkylsulphinylamino, C1-6 alkylsulphonylamino C1-6 alkoxysulphinylamino …