Design of dual-acting thromboxane antagonist-synthase inhibitors by a mutual prodrug approach
摘要:
A mutual prodrug approach to dual acting thromboxane receptor antagonist - thromboxane synthase inhibitor compounds is reported in which TXA(2) antagonist and inhibitory 19-dioxanes with hexenoic acid side chains, were linked by diester and diamide groups. When linking of the components was achieved via di O-alkyl carboxylic esters of catechol, both TXA(2) receptor antagonist activity and TXA(2) synthase inhibition were observed for a single enantiomer (16) in ex vivo tests following oral dosing to dogs at 5 mg/kg.
Dual-Acting Thromboxane Receptor Antagonist/Synthase Inhibitors: Synthesis and Biological Properties of [2-Substituted-4-(3-pyridyl)-1,3-dioxan-5-yl]alkenoic Acids
摘要:
The design, synthesis, and pharmacology of a new class of compounds possessing both thromboxane receptor antagonist and thromboxane synthase inhibitory properties are described. Replacement of the phenol group of the known thromboxane antagonist series 4(Z)-6-[(4RS,5SR)-4-(2-hydroxyphenyl)-1,3-dioxan-5-yl]hex-4-enoic acid by a 3-pyridyl group led to a series of compounds, 5, which were potent thromboxane synthase inhibitors and weak thromboxane antagonists. Further modifications at the dioxane C2 position led to compounds, 7, which were potent dual-acting agents. In the case of compound 7w, the dual activity was shown to reside almost exclusively in the (-)-enantiomer, 7x. Following oral dosing to rats and dogs, 7x (3 mg/kg) displayed significant dual activity over a period of at least 8 h.