Synthesis of 4<i>H</i>-3-aryl-2-cyano-1,4-benzothiazine 1,1-dioxides for antiviral studies
作者:Phillip D. Wilkerson、Andrew C. Bean、Chad E. Stephens
DOI:10.1515/hc-2017-0028
日期:2017.4.1
Abstract 2-Cyano-substituted 1,4-benzothiazine 1,1-dioxides, required for antiviral studies, were prepared by a reductive cyclodehydration of an ortho-nitro sulfone precursor containing a pendant aryl ketone group. The ring-forming reaction also furnishes a non-cyclized benzamide as a major byproduct via an unexpected acyl transfer reaction.
Synthesis and antiviral/antitumor evaluation of 2-amino- and 2-carboxamido-3-arylsulfonylthiophenes and related compounds as a new class of diarylsulfones
作者:C Stephens
DOI:10.1016/s0968-0896(00)00333-3
日期:2001.5
Based on general SARs previously described for anti-HIV-l diarylsulfone derivatives, a series of 2-amino- and 2-carboxamido-3-arylsulfonylthiophenes has been prepared and evaluated as potential antiviral and antitumor agents. In cell culture, some of the 2-aminothiophenes exhibited moderate and selective activity against HIV-1, with 2-amino-3-(2-nitrophenylsulfonyl)thiophene (7e) being most attractive (EC50 = 3.8 mug/mL: CC50 = > 100 mug/mL). In broad-spectrum antiviral assays, the 3-arylsulfonyl-2-(trifluoroacetamido)thio (8c-g) and 2-acetamido-3-arylsulfonyl-5-nitrothiophenes (9f-g) proved considerably active (IC50 = 0.1-10 mug/mL) against human cytomegalovirus (CMV) and/or varicella tester virus (VZV). Based on the activity of the trifluoroacetamides, ring-modified furan, N-(substituted)pyrrole, phenyl, and 3,4-thiophene analogues were prepared, and these compounds were also active against CMV and/or VZV, with the notable exception of the 3,4-thiophene derivative. In contrast to other amines, the 2-aminopyrrole precursors (13a-d) also exhibited potent activity against CMV. Unfortunately, most of these compounds displayed significant cytotoxicity against human fibroblasts, the cells supporting CMV and VZV replication, and thus selectivity indices were low. The most notable exception to this was the naphthyl-substituted aminopyrrole 13d, which exhibited both potent (IC50 = 0.3 mug/mL) and selective (CC50 = > 50 mug/mL) activity against CMV. Finally, thiophene aryl amides 8i-k displayed moderate in vitro activity against certain leukemia, breast, and colon cancer cell lines. (C) 2001 Elsevier Science Ltd. All rights reserved.
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