N-[(1H-imidazol-l-yl) alkyl]-1H-isoindole-1, 3 (2H)-diones which were the subject of a previous report from our laboratories. These compounds were evaluated as thromboxane (TX) synthetase inhibitors and as antihypertensive agents. While each series of compounds had activity both as TX synthetase inhibitors and as antihypertensives, the best compounds were N-[(1H-imidazol-l-yl) alkyl] quinazoline-2, 4 (lH, 3~-diones (V). In general these ...