Synthesis and In vitro platelet aggregation and TP receptor binding studies on bicyclic 5,8-Ethanooctahydroisoquinolines and 5,8-Ethanotetrahydroisoquinolines
作者:Shankar L Saha、Victoria F Roche、Kathleen Pendola、Mark Kearley、Longping Lei、Karl J Romstedt、Mark Herdman、Gamal Shams、Vivek Kaisare、Dennis R Feller
DOI:10.1016/s0968-0896(02)00101-3
日期:2002.8
Eighteen novel bicyclic 1-substituted benzyl octahydro- and tetrahydroisoquinolines were synthesized and evaluated for human thromboxane A(2)/prostaglandin H-2 (TP) receptor affinity and antagonism of TP receptor-mediated platelet aggregation. In both cases, potency depended more on the presence of methoxy groups On the 1-benzyl Moiety than On nitrogen Substitution or extent of oxidation of the isoquinoline ring system. The most potent of the bicyclic compounds retained the 5,8-ethanooctahydroisoquinoline ring structure of the parent molecule (1) and required the 3,4,5-trimethoxybenzyl substitution Pattern found in the well-characterized tetrahydroisoquinoline antiplatelet agent trimetoquinol. Differences in nitrogen substituent SAR were noted between the mono-methoxylated compounds and the 3,4,5-trimethoxybenzyl derivatives. (C) 2002 Elsevier Science Ltd. All rights reserved.