Seven derivatives of 2-[[2-(3, 4-dihydroxyphenyl)-l-methylethyl] amino]-6, 7-dihydroxy-l, 2, 3, 4-tetrahydronaphthalene, an inotropic agent which also causes a decrease in blood pressure, were synthesized and tested for inotropic potency, cardioselectivity, and inotropic selectivity. The derivatives were designed to explore whether catechol moieties and rigid rotamers of dopamine are necessary for the activity which was found in the parent ...