Anti-AIDS Agents 90. Novel C-28 Modified Bevirimat Analogues as Potent HIV Maturation Inhibitors
摘要:
In a continuing study of bevirimat (2), the anti-HIV-maturation clinical trials agent, 28 new betulinic acid (BA, 1) derivatives were designed and synthesized. Among these compounds, 17, with a C-28 MEM ester moiety, and 22, with a C-28 ethyl hexanoate, increased the anti-HIV replication activity compared with 2 by 2-fold while compounds 40, 41, 48, and 49, with C-28 piperazine or piperidine amide substitutions, increased the activity by 3- to 15-fold. The best new compound, 41, exhibited an anti-HIV IC50 of 0.0059 mu M compared with 0.087 mu M antimaturation effects, as confirmed by TZM-bl assay, in blocking the HIV replication. The results suggest that proper C-28 substitutions can further enhance the antimaturation activity of 2 without any antientry effects. Thus, 41 may serve as a promising new lead for development of anti-AIDS clinical trial candidates.
interaction and histone deacetylases (HDACs) are important targets in antitumor drug development. Inspired by the synergistic effects between MDM2 and HDACs, the first MDM2/HDACs dual inhibitors were identified, which showed excellent activities against both targets. In particular, compound 14d was proven to be a potent and orally active MDM2/HDAC dual inhibitor, whose antitumor mechanisms were validated in
development of radioimmunoassay procedures for trifluoperazine and fluphenazine, three haptens, N-(2-carboxyethyl)desmethyltrifluoperazine, N-(4-carboxybutyl)desmethyltrifluoperazine, and 10-[3-(4-carboxyethylpiperazinyl)-3-oxopropyl]-2-trifluoromethyl-+ ++10H- phenothiazine, were synthesized and characterized. Each hapten was coupled to bovine serum albumin, and the number of hapten residues per mole