The synthesis and pharmacology of 2-(5,6-dihydroxy-1,2,3,4-tetrahydro-1-naphthyl)imidazoline (A-54741, 4), a very potent alpha-adrenergic agonist, are described. The change in biological activity resulting from variation of the carbocyclic ring size of 4 from four through seven members (2-5) is presented, as well as an explanation that accounts for this change in activity by considering the "exactness
描述了非常有效的α-
肾上腺素能激动剂2-(5,6-二羟基-1,2,3,4-四氢-1-
萘基)
咪唑啉(A-54741,4)的合成和药理作用。提出了由于碳环尺寸从4个变化到七个(2-5)从4个变化而引起的
生物活性变化,并给出了解释这种活性变化的解释,其中考虑了它们的“拟合精确性” α1和α2
肾上腺素受体的化合物。在体外发现化合物4是一种完全激动剂,对α2受体(ED50
去甲肾上腺素(NE)/ ED50 4 = 188 +/- 22)的效力比对α1受体(ED50 NE / ED50 4 = 13 + /-2)。