Enantiomerically enriched disubstituted tetrahydrofurans, tetrahydrothiophenes, pyrrolidines and cyclopentanes are disclosed that reduce the chemotaxis and respiratory burst leading to the formation of damaging oxygen radicals of polymorphonuclear leukocytes during an inflammatory or immune response. The compounds exhibit this biological activity by acting as PAF receptor antagonists, by inhibiting the enzyme 5-lipoxygenase, or by exhibiting dual activity, i. e., by acting as both a PAF receptor antagonist and inhibitor of 5-lipoxygenase.
It has been determined that 5-lipoxygenase activity, oral availability, and stability in vivo (for example, glucuronidation rate) can vary significantly among the optical isomers of the disclosed compounds.
本发明揭示了对映富集的二取代
四氢呋喃、
四氢噻吩、
吡咯烷和
环戊烷,可减少在炎症或免疫反应期间多形核白细胞的趋化和呼吸爆发,从而导致有害
氧自由基的形成。这些化合物通过作为PAF受体
拮抗剂、抑制酶5-脂
氧化酶或表现出双重活性即既作为PAF受体
拮抗剂又作为5-脂
氧化酶
抑制剂而表现出这种
生物活性。已经确定,所述化合物的光学异构体中,5-脂
氧化酶活性、口服可用性和体内稳定性(例如,
葡萄糖醛酸化速率)可以有显著差异。