FeCl3-catalyzed cross-coupling of o-iodobenzoic acids with azole-2-thiols and amidation followed by in situ acidic condensation delivered azo[2,1-b][1,3]-benzothiazinones. A simple “one-pot” operation is conducted for this reaction. This reaction avoids the use of expensive catalytic reagents and provides the desired products containing different azole rings and substituents in good yields.
Substituted 2-mercaptobenzimidazoles (MBI) are an important class of bio-active and industrially important organic compounds. In this Letter, a new synthetic method is presented for the selective S-arylation of MBI with substituted aryl iodides using low cost copper (I) iodide and 1,10-phenanthroline as a catalytic system. The selective formation of S-arylated product was confirmed by several spectroscopic techniques and the vibrational spectrum was found to be in very good agreement with the theoretical spectrum calculated by density functional theory. (C) 2011 Elsevier Ltd. All rights reserved.
Nageswar, Y. V. D.; Murty, M. S. R.; Ramalingam, T., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 1142 - 1143
作者:Nageswar, Y. V. D.、Murty, M. S. R.、Ramalingam, T.、Sattur, P.B.
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Giannola,L.I. et al., Journal of Heterocyclic Chemistry, 1977, vol. 14, p. 507 - 509
作者:Giannola,L.I. et al.
DOI:——
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NAGESWAR, Y. V. D.;MURTY, M. S. R.;RAMALINGAM, T.;SATTUR, P. B., INDIAN J. CHEM. B , 27B,(1988) N2, C. 1142-1143
作者:NAGESWAR, Y. V. D.、MURTY, M. S. R.、RAMALINGAM, T.、SATTUR, P. B.