Synthesis and Anti-HIV-1 Activity Evaluation for Novel 3a,6a-Dihydro-1H-pyrrolo[3,4-c]pyrazole-4,6-dione Derivatives
作者:Guan-Nan Liu、Rong-Hua Luo、Yu Zhou、Xing-Jie Zhang、Jian Li、Liu-Meng Yang、Yong-Tang Zheng、Hong Liu
DOI:10.3390/molecules21091198
日期:——
recently disclosed 1-[2-(4-fluorophenyl)ethyl]-pyrrole-2,5-dione scaffolds to design 35 novel compounds with improved biological activities against HIV-1. These new compounds show single-digit micromolar antiviral potencies against HIV-1 and low toxicity. Among of them, compound 9g and 15i had potent anti-HIV-1activities (EC50 < 5 μM) and excellent therapeutic index (TI, CC50/EC50 > 100). These two compounds
Diels-Alder reaction of thebaine with maleimides is structurally specific and yields [7,8,3′,4′ ]-succinimido-endo-ethenotetrahydrothebaines containing N′-alkyl, cycloalkyl, aralkyl or aryl substituents. N′-[1(S)-hydroxymethyl-2-methylpropyl]-succinimido-6,14-endo-ethenotetrahydrothebaine formed in reaction of S-valinol with (7α,8α)-anhydrido-6,14-endo-ethenotetrahydrothebaine. The reduction of the adducts by LiAlH4 afforded N′-substituted 7,8-pyrrolidino-endo-ethenotetrahydrothebaines. The reduction of fused succinimides by NaBH4 resulted in the corresponding 2′α-hydroxylactam derivatives. O-Demethylation of the tetrahydrothebaine pyrrolidine derivatives effected by BBr3 afforded compounds of the tetrahydrooripavine series. The O-demethylation of tetrahydrothebaine succinimide derivatives gave rise to the corresponding 6-demethyl-endo-ethenotetrahydrooripavines. Alkylation conditions were found for N′-(4-hydroxyphenethyl)-substituted tetrahydrothebaine succinimide derivatives.