Selective and potent .beta.2-adrenoceptor agents within the tetrahydroisoquinoline class: effect of methyl substitution at the benzylic carbon of the 1-(3,4,5-trimethoxybenzyl) group of trimetoquinol
作者:Douglas J. Sober、Jane Chang、Edward H. Fairchild、John W. Fowble、Asoke Mukhopadhyay、Dennis R. Feller、Duane D. Miller
DOI:10.1021/jm00140a011
日期:1981.8
adrenoceptor activities. Structural assignments for the erythro (2) and the threo (3) diastereoisomers of 1-(3,4,5-trimethoxy-alpha-methylbenzyl)-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline were based on NMR spectra of the 6,7-dibenzyl precursors 15 and 16, respectively, and on the synthetic derivatives of cis- and trans-13-methyl-2,3-bis(benzyloxy)-9,10,11-trimethoxytetrahydroprotoberberine (18 and 17)
合成了系统系列的偏苯三酚(1)的甲基(2和3)和二甲基(4)类似物,并评估了它们的beta 1(心房)和beta 2(气管)和肾上腺素受体活性。1-(3,4,5-三甲氧基-α-甲基苄基)-6,7-二羟基-1,2,3,4-四氢异喹啉的赤型(2)和苏型(3)非对映异构体的结构分配基于6,7-二苄基前体15和16以及顺式和反式-13-甲基-2,3-双(苄氧基)-9,10,11-三甲氧基四氢protoberberine的合成衍生物的NMR光谱(18和17)。这些化合物的β2激动剂活性的等级顺序为3大于1大于2大于2大于4。在豚鼠心房上,作为β1激动剂的活性等级为1大于3大于2,4为。不活跃。在我们的初步药理研究中,甲基化类似物显示出对β2受体的选择性。苏糖异构体3是迄今为止在四氢异喹啉类中最有效和选择性最强的β2兴奋剂。