Abstract
A new series of pyrazolobenzothiazine-based carbohydrazides was prepared in a facile way, starting with commercially available sodium saccharine. The final products were sufficiently characterized by spectroscopic techniques. In addition, compound 5k was confirmed with X-ray crystallography as well. All the compounds were screened for anti-HIV-1 and cytotoxicity activities. Overall, out of 15 compounds, seven exhibited good activity with EC50 values <20 μM. Compounds 5c, 5d, 5g, 5j and 5k appeared as the potent anti-HIV-1 agents with EC50 values <5.0 μM. The structure–activity relationship would facilitate the discovery of new molecules with better profile of HIV inhibition activity.
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References
Ahmad M, Siddiqui HL, Ahmad S, Parvez M, Tizzard GJ (2010a) Synthesis and crystal structures of a series of pyrazolo[4,3-c][1,2]benzothiazine,2,4-dihydro-3,4-dimethyl-,5,5-dioxide derivatives. J Chem Crystallogr 40:1188–1194
Ahmad M, Siddiqui HL, Azam M, Bukhari IH, Parvez M (2010b) 2-(2-Oxo-2-phenylethyl)-1,2-benzisothiazol-3(2H)-one 1,1-dioxide. Acta Cryst E 66:o616
Ahmad M, Siddiqui HL, Rizvi UF, Ahmad S, Parvez M (2010c) 3-Benzoyl-4-hydroxy-2H-1,2-benzothiazine 1,1-dioxide. Acta Cryst E66:o862
Ahmad M, Siddiqui HL, Zia-ur-Rehman M, Parvez M (2010d) Antioxidant and antibacterial activities of novel N′-arylmethylidene-2-(3,4-dimethyl-5,5-dioxidopyrazolo[4,3c][1,2] benzothiazin-2-(4H)-yl) acetohydrazides. Eur J Med Chem 45:698–704
Ahmad M, Rizvi SUF, Siddiqui HL, Ahmad S, Parvez M, Suliman R (2012) Antioxidant and antimicrobial studies of novel N-(substituted-2-chloroquinolin-3-yl)methylidene-4-hydroxy-2H-1,2-benzothiazine-3-carbohydrazides 1,1-dioxides. Med Chem Res 21(9):2340–2348
Ahmad M, Siddiqui HL, Gardiner JM, Parvez M, Aslam S (2013) Synthesis and antioxidant studies of novel N-substituted benzyl/phenyl-2-(3,4-dimethyl-5,5-dioxidopyrazolo[4,3-c][1,2]benzothiazin-2(4H)-yl)acetamides. Med Chem Res 22:794–805
Altomare A, Cascarano M, Giacovazzo C, Guagliardi A (1993) SIR92. J Appl Cryst 26:343
Aslam S, Ahmad M, Zia-ur-Rehman M, Montero C, Detorio M, Parvez M, Schinazi RF (2013) Synthesis and anti-HIV-1 screening of novel N′-(1-(aryl)ethylidene)-2-(5,5-dioxido-3-phenylbenzo[e]pyrazolo[4,3-c][1,2]thiazin-4(1H)-yl)acetohydrazides. Arch Pharm Res. doi:10.1007/s12272-013-0200-9
Belen’kii MS, Schinazi RF (1994) Multiple drug effect analysis with confidence interval. Antiviral Res 25:1–11
Berryman KA, Edmunds JJ, Bunker AM, Haleen S, Bryant J, Welch KM, Doherty AM (1998) Endothelin receptor antagonists: synthesis and structure–activity relationships of substituted benzothiazine-1,1-dioxides. Bioorg Med Chem 6:1447–1456
Beurskens PT, Admiraal G, Beurskens G, Bosman WP, de Gelder R, Israel R, Smits JMM (1994) The DIRDIF-94 program system, technical report of the crystallography laboratory. University of Nijmegen, Nijmegen
Bihovsky R, Tao M, Mallamo JP, Wells GJ (2004) 1,2-Benzothiazine 1,1-dioxide α-ketoamide analogues as potent calpain I inhibitors. Bioorg Med Chem Lett 14:1035–1038
Bukhari MH, Siddiqui HL, Ahmad M, Hussain T, Moloney MG (2012) Synthesis and anti-bacterial activities of some novel pyrazolobenzothiazine-based chalcones and their pyrimidine derivatives. Med Chem Res 21(10):2885–2895
Coffin J, Haase A, Levy JA, Montagnier L, Oroszlan S, Teich N, Temin H, Toyoshima K, Varmus H, Vogt P (1986) What to call the AIDS virus? Nature 321:10
De Clercq E (2006) From adefovir to AtriplaTM via tenofovir VireadTM and TruvadaTM. Future Virol 1:709–715
De Clercq E (2007a) The design of drugs for HIV and HCV. Nat Rev 6:1001–1018
De Clercq E (2007b) Anti-HIV drugs. K Verh Acad Geneesk Belg 64:81–104
Farrugia LJ (1997) ORTEP-3 for windows—a version of ORTEP-III with a graphical user interface (GUI). J Appl Cryst 30:565
Gallant JE, DeJesus E, Arribas JR, Pozniak AL, Gazzard B, Campo RE, Lu B, McColl D, Chuck S, Enejosa J, Toole JJ, Cheng AK (2006) Tenofovir DF emtricitabine, and efavirenz vs zidovudine, lamivudine, and efavirenz for HIV. N Engl J Med 354:251–260
Gupta RR, Dev PK, Sharma ML, Rajoria CM, Gupta A, Nyati M (1993) Anticancer activities of 2,3-dihydro-1,4-benzothiazines, and of their 4-(N-alkyl amides) and 4-(N-alkyl N-nitrosoamides). Anticancer Drugs 4:589–592
Hooft R, Collect. Nonius B V, Delft, (1998) The Netherlands
Lomabardino JG, Wiseman EH, Mclamore W (1971) Synthesis and antiinflammatory activity of some 3-carboxamides of 2-alkyl-4- hydroxy-2H-1,2-benzothiazine 1,1-dioxide. J Med Chem 14:1171–1175
Marfat A (1985) Anti-inflammatory 2-methyl-2H-1,2-benzo-(or-thieno-)thiazine-3-carboxamide 1,1-dioxide derivatives, compositions, and method of use therefor.US Patent 4, 551, 452
Mitsuya H, Weinhold KJ, Furman PA, St. Clair MH, Lehrman SN, Gallo RC, Bolognesi D, Barry DW, Broder S (1985) 3′-Azido-3′-deoxythymidine (BW A509U): an antiviral agent that inhibits the infectivity and cytopathic effect of human t-lymphotropic virus type III/lymphadenopathy-associated virus in vitro. Proc Natl Acad Sci USA 82(20):7096–7100
Otwinowski Z, Minor W (1997) Processing of X-ray diffraction data collected in oscillation mode. Methods Enzymol 276:307–326
Pozniak AL, Gallant JE, DeJesus E, Arribas JR, Gazzard B, Campo RE, Chen SS, McColl D, Enejosa J, Toole JJ, Cheng AK (2006) Tenofovir disoproxil fumarate, emtricitabine, and efavirenz versus fixed-dose zidovudine/lamivudine and efavirenz in antiretroviral-naïve patients. J Aquir Immune Defic Syndr 43:535–540
Rizvi SUF, Ahmad M, Bukhari MH, Montero C, Chatterjee P, Detorio M, Schinazi RF (2013) Anti-HIV-1 screening of (2E)-3-(2-chloro-6-methyl/methoxyquinolin-3-yl)-1-(aryl)prop-2-en-1-ones. Med Chem Res. doi:10.1007/s00044-013-0652-y
Schinazi RF, Sommadossi PJ, Cannon DL, **e MY, Hart GC, Smith JA, Hahan EF (1990) Activities of 3′-azido-3′-deoxythymidine nucleotide dimers in primary lymphocytes infected with human immunodeficiency virus type 1. Antimicrob Agents Chemother 34:1061–1067
Sheldrick GM (2008) A short history of SHELX. Acta Cryst A64:112–122
Stuyver LJ, Lostia S, Adams M, Mathew SJ, Pai SB, Grier J, Tharnish MP, Choi Y, Chong Y, Choo H, Chu KC, Otto JM, Schinazi FR (2002) Antiviral activities and cellular toxicities of modified 2′,3′-dideoxy-2′,3′-didehydrocytidine analogues. Antimicrob Agents Chemother 46:3854–3860
Turck D, Busch U, Heinzel G, Narjes H, Nehmiz G (1995) Effect of Food on the Pharmacokinetics of Meloxicam after oral administration. Clin Drug Invest 9:270–276
Acknowledgments
The authors (MA, SA, and MHB) are grateful to Higher Education Commission, Pakistan and Institute of Chemistry, University of the Punjab, Lahore, for financial assistance. We are also thankful to International Centre for Chemical and Biological Sciences, HEJ Research Institute of Chemistry, University of Karachi, Karachi, for spectral measurements. This work was also supported in part by NIH Grant 2P30-AI-050409 and the Department of Veterans Affairs (RFS), USA. The X-ray coordinate of the compounds has been deposited at Cambridge Crystallographic Data Centre with CCDC numbers 881054.
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This research article is dedicated to the late professor Dr. Hamid Latif Siddiqui, our honorable teacher (MA, SA and MHB) and friend (MP and RFS).
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Ahmad, M., Aslam, S., Bukhari, M.H. et al. Synthesis of novel pyrazolobenzothiazine 5,5-dioxide derivatives as potent anti-HIV-1 agents. Med Chem Res 23, 1309–1319 (2014). https://doi.org/10.1007/s00044-013-0718-x
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DOI: https://doi.org/10.1007/s00044-013-0718-x