4-Substituted 2-alkoxytetrahydrofurans as potent and long-lasting PAF antagonists
摘要:
A series of 4-substituted 2-alkoxytetrahydrofuran derivatives featuring an acetal group were prepared and evaluated for PAF antagonist activity in the PAF-induced in vitro platelet-aggregation and in vivo hypotension tests. Compound 2-[[N-acetyl-N-[[[2-(octadecyloxy)tetrahydrofuran-4-yl]methoxy]carbonyl]amino]methyl]1-ethylpyridinium chloride (4e, UR-11353) was selected for further development on the basis of its high activity and long-lasting action. The compound maintained a significant activity even 24 h after administration of a single dose of 1 mg/kg iv in the PAF-induced mortality test in mice and 10 h after administration of the same dose in the PAF-induced hypotension test in rats. Comparison with previously reported carba analogues suggests that the presence of the acetal group is the structural characteristic that confers its long-lasting activity.
Synthesis of ()-2′-oxa-carbocyclic-2′,3′-dideoxynucleosides as potential anti-HIV agents
作者:Mark J. Bamford、David C. Humber、Richard Storer
DOI:10.1016/0040-4039(91)80873-5
日期:1991.1
Novel 2′,3′-dideoxynucleosides, having the pentofuranosyl oxygen at the 2′-position, were obtained by a short synthetic route from diethyl malonate and bromoacetaldehyde dimethyl acetal. The results of biological testing against HIV-1 in vitro are presented.