Abstract
A facile, efficient and environmentally friendly heteroannulation protocol for the exclusive synthesis of medicinally important azeto[2,1-d][1,5]benzothiazepines 3 has been developed in the presence of 10 mol% K2CO3 under sonication. In comparison to conventional synthesis, where mixture of products such as 3, phenyl-N-acetyl-2-styrylbenzothiazole 4 and 1,3-oxazine derivative 5 were formed in several hours of heating, the present method provides several advantages including selective synthesis of 3 with simpler work-up procedure, higher yields in shorter reaction time and green aspects through the avoidance of toxic catalysts and solvents.
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Notes
The H37Rv clinical isolate was obtained from the Institute of Microbial Technology, Surat, India. L.J. was used as the nutrient medium to grow and dilute the tested drug suspensions. The inoculum size for the strain test was adjusted to 1 mg/mL. A 2 mg/mL stock solution was prepared for each synthesized drug. DMSO (1%) was used as diluent/vehicle to obtain the desired concentration of drug to test on standard bacterial strains. In a primary screening, 500, 250, and 125 lg/mL concentrations of the synthesized drugs were used. The active synthesized drugs identified in this primary screening were then diluted to obtain 100, 50, 25, 12.5, 6.250, 3.125, and 1.5625 lg/mL concentrations, and further tested in a second set of dilutions against all microorganisms. The standard strain MTB H37Rv was retested with each new batch of medium. The minimum inhibitory concentration (MIC) was defined as the minimum concentration of compound required to inhibit 99% of bacterial growth. Vehicle and reference agents were used in every test as the negative and positive controls, and the assays were performed in duplicate.
References
D.J. Newman, G.M. Cragg, J. Nat. Prod. 70, 461 (2007)
J.W.H. Li, J.C. Vederas, Science 325, 161 (2009)
K. Kumar, H. Waldmann, Angew. Chem. 121, 3272 (2009)
R.A. Mane, D.B. Ingle, Indian J. Chem. 21B, 973 (1982)
K.P. Jadhav, D.B. Ingle, Indian J. Chem. 22B, 180 (1983)
A. Attia, O.I. Abdel-salam, M.H. Abo-Ghalia, A.E. Amr, Egypt. J. Chem. 38, 543 (1995)
R.J. Reddy, D. Ashok, P.N. Sarma, Indian J. Chem 32, 404 (1993)
K. Satyanarayana, M.N.A. Rao, Indian J. Pharm. Sci. 55, 230 (1993)
G. DeSarro, A. Chimirri, A. DeSarro, R. Gitto, S. Grasso, M. Zappala, Eur. J. Med. Chem. 30, 925 (1995)
J.B. Bariwal, K.D. Upadhyay, A.T. Manvar, J.C. Trivedi, J.S. Singh, K.S. Jain, A.K. Shah, Eur. J. Med. Chem. 43, 2279 (2008)
M.A. Raggi, R. Mandrioli, C. Sabbioni, V. Pucci, Curr. Med. Chem. 11, 279 (2004)
B. Capuano, I.T. Crosby, E. Lloyd, J. Curr, Med. Chem. 9, 521 (2002)
J.M. Goldstein, Drugs Today 35, 193 (1999)
H. Kugita, H. Inoue, M. Ikezaki, M. Konda, S. Takeo, Chem. Pharm. Bull. 19, 595 (1971)
R. Budriesi, B. Cosimelli, P. Ioan, E. Carosati, M.P. Ugenti, R. Spisani, Curr. Med. Chem. 14, 279 (2007)
M.M.T. Buckley, S.M. Grant, D. McTavish, E.M. Sorkin, Drugs 39, 757 (1990)
H. Inoue, M. Konda, T. Hashiyama, H. Otsuka, K. Takahashi, M. Gaino, T. Date, K. Aoe, M. Takeda, S. Murata, H. Narita, T. Nagao, J. Med. Chem. 34, 675 (1991)
T. Suzuki, H. Kurosawa, K. Naito, M. Otsuka, M. Ohashi, O. Takaiti, Eur. J. Pharmacol. 194, 195 (1991)
P.D. Mehta, N.P.S. Sengar, A.K. Pathak, Eur. J. Med. Chem 45, 5541 (2010)
R.B. Morin, M. Gorman (eds.), Chemistry and Biology of β-Lactam Antibiotics, vol. 1–3 (Academic Press, New York, 1982)
R. Southgate, S. Elson, Prog. Chem. Org. Natural Prod. 47, 1 (1985)
J. Xu, Mol. Divers. 9, 45 (2005)
S. Pippich, H. Bartsch, T.J. Erker, Heterocycl. Chem. 34, 823 (1997)
A. Szollosy, G. Kotovych, G. Toth, A. Levai, Can. J. Chem. 66, 279 (1988)
H. Staudinger, Liebigs Ann. 356, 51 (1907)
L. Kuznetsova, M.I. Ungureanu, A. Pepe, I. Zanardi, X. Wu, I. Ojima, J. Fluorine Chem. 125, 415 (2004)
I. Ojima, J.R. McCarthy, J.T. Welch, Biomedical Frontiers of Fluorine Chemistry (American Chemical Society, New York, 1996)
P. Kirsch, Modern Fluoroorganic Chemistry: Synthesis, Reactivity and Applications (Wiley-VCH, New York, 2004)
M. Abid, B. Torok, Adv. Synth. Catal. 347, 1797 (2005)
S.C. O’Hagan, S.L. Cobb, J.T.G. Hamilton, D. Cormac, C.D. Murphy, Nature 416, 279 (2002)
P. Yan, B. Torok, G.K.S. Prakash, G.A. Olah, Synlett 4, 527 (2003)
M. Doble, A. Kumar, Green Chemistry and Engineering (Elsevier, Amsterdam, 2007)
J.T. Li, Y. Yin, L. Li, M.X. Sun, Ultrason. Sonochem. 17, 11 (2010)
T.J. Mason, D. Peer, Practical Sonochemistry, 2nd edn. (Ellis Horwood, London, 2002)
E. Ruiz, H. Rodriguez, J. Coro, E. Salfran, M. Suarez, R.M. Alvarez, N. Martin, Ultrason. Sonochem. 18, 32 (2011)
T.J. Manson, Chem. Soc. Rev. 26, 443 (1997)
M.M. Mojtahedi, M. Javadpour, M.S. Abaee, Ultrason. Sonochem. 15, 828 (2008)
G. Cravotto, P. Cintas, Chem. Soc. Rev. 35, 180 (2006)
G. Nagendrappa, Resonance 7, 59 (2002)
K. Tanaka, F. Toda, Chem. Rev. 100, 1025 (2000)
K. Tanaka, Solvent-Free Organic Synthesis (Vch Verlagsgesellschaft Mbh, Weinheim, 2003)
A. Dandia, K. Arya, Biorg. Med. Chem. Lett. 18, 114 (2008)
A. Dandia, R. Singh, S. Khaturia, J. Fluorine Chem. 128, 524 (2007)
A. Dandia, M. Sati, K. Arya, P. Sarawagi, A. Loupy, Arkivoc. 9, 105 (2005)
A. Dandia, M. Sati, K. Arya, A. Loupy, J. Sulfur Chem. 25, 283 (2004)
A. Dandia, M. Sati, K. Arya, A. Loupy, Heterocycles 3, 563 (2003)
A. Dandia, M. Sati, K. Arya, R. Sharma, A. Loupy, Chem. Pharm. Bull. 50, 1137 (2003)
A. Dandia, M. Sati, K. Arya, A. Loupy, Green Chem. 4, 599 (2002)
A. Dandia, A.K. Laxkar, R. Singh, Tetrahedron Lett. 53, 3012 (2012)
A. Dandia, R. Singh, S. Bhaskaran, Green Chem. 13, 1852 (2011)
A. Dandia, V. Parewa, A.K. Jain, K.S. Rathore, Green Chem. 13, 2135 (2011)
A. Dandia, R. Singh, S. Bhaskaran, Ultrason. Sonochem. 17, 399 (2010)
A. Dandia, A.K. Jain, D.S. Bhati, Tetrahedron Lett. 52, 5333 (2011)
A. Weissler, J. Chem. Educ. 25, 28 (1948)
V. Migrdichian, Organic Synthesis (Reinhold Publishing Corporation, New York, 1960)
U.C. Pant, M. Upreti, S. Pant, A. Dandia, G.K. Patnaik, A.K. Goel, Phosphorus Sulfur Silicon 126, 193 (1997)
Acknowledgments
Financial assistance from the C.S.I.R. [02(0143)/13/EMR-II], New Delhi is gratefully acknowledged. We are also grateful to the Central Drug Research Institute (CDRI), Lucknow, for the spectral analyses and elemental analyses.
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Dandia, A., Singh, R. & Gupta, S.L. Ultrasound-assisted facile and selective synthesis of azeto[2,1-d][1,5]benzothiazepines under solvent-free conditions and their biological activity. Res Chem Intermed 41, 1559–1569 (2015). https://doi.org/10.1007/s11164-013-1292-z
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DOI: https://doi.org/10.1007/s11164-013-1292-z