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[摘要]：A number of fatty acyl derivatives of (-)-2',3'-dideoxy-3'-thiacytidine (lamivudine, 3TC, 1) were synthesized and evaluated for their anti-HIV activity. The monosubstituted 5'-O-fatty acyl derivatives of 3TC (EC50 = 0.2-2.3 mu M) were more potent than the corresponding monosubstituted N-4-fatty acyl (EC50 = 0.4-29.4 mu M) and 5'-O-N-4-disubstituted (EC50 = 72.6 to >154.0 mu M) derivatives of the nucleoside. 5'-O-Myristoyl (16) and 5'-O-12-azidododecanoyl derivatives (17) were found to be the most potent compounds (EC50 = 0.2-0.9 mu M) exhibiting at least 16-36-fold higher anti-HIV activity against cell-free virus than 1 (EC50 = 11.4-32.7 mu M). The EC90 values for 16 against B-subtype and C-subtype clinical isolates were several folds lower than those of 1. The cellular uptake studies confirmed that compound 16 accumulated intracellularly after 1 h of incubation with CCRF-CEM cells and underwent intracellular hydrolysis. 5'-O-Fatty acyl derivatives of 1 showed significantly higher anti-HIV activity than the corresponding physical mixtures against the B-subtype virus. |
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