- The Reaction of N -Trimethylsilyl-Substituted Heteroarylamines with Esters and Thioesters: An Efficient Protocol to Access Diheteroarylamides
-
The S -benzyl thioester and methyl ester derivatives of a representative 4-pyridinone-based carboxylic acid were sufficiently activated to react efficiently in amide coupling reactions with the amide anion generated in situ from the N -trimethylsilyl derivative of different weakly nucleophilic heteroarylamines. In acetonitrile as solvent, the precipitated diheteroarylamide products were isolated in pure form by vacuum filtration. This simple amide bond forming protocol can be readily adapted to the parallel synthesis of compound libraries.
- Koperniku, Ana,Zamiri, Maryam,Grierson, David S.
-
p. 1779 - 1790
(2019/04/05)
-
- A Parallel Synthesis Approach to the Identification of Novel Diheteroarylamide-Based Compounds Blocking HIV Replication: Potential Inhibitors of HIV-1 Pre-mRNA Alternative Splicing
-
A 256-compound library was evaluated in an anti-HIV screen to identify structural "mimics"of the fused tetracyclic indole compound 1 (IDC16) that conserve its anti-HIV activity without associated cytotoxicity. Four diheteroarylamide-type compounds, containing a common 5-nitroisobenzothiazole motif, were identified as active. In subsequent screens, the most potent compound 9 (1C8) was active against wild-type HIV-1IIIB (subtype B, X4-tropic) and HIV-1 97USSN54 (subtype A, R5-tropic) with EC50's of 0.6 and 0.9 μM, respectively. Compound 9 also inhibited HIV strains resistant to drugs targeting HIV reverse transcriptase, protease, integrase, and coreceptor CCR5 with EC50's ranging from 0.9 to 1.5 μM. The CC50 value obtained in a cytotoxicity assay for compound 9 was >100 μM, corresponding to a therapeutic index (CC50/EC50) of approximately 100. Further comparison studies revealed that, whereas the anti-HIV activity for compound 9 and the parent molecule 1 are similar, the cytotoxic effect for compound 9 was, as planned, markedly suppressed.
- Cheung, Peter K.,Horhant, David,Bandy, Laura E.,Zamiri, Maryam,Rabea, Safwat M.,Karagiosov, Stoyan K.,Matloobi, Mitra,McArthur, Steven,Harrigan, P. Richard,Chabot, Benoit,Grierson, David S.
-
p. 1869 - 1879
(2016/03/22)
-