comprehensive and facile synthesis of some functionalized bis-heterocyclic compounds containing a thieno[2,3-b]thiophene motif全面、简单的合成一些功能化bis-heterocyclic化合物包含thieno[2,3 b]噻吩主题.pdfVIP
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comprehensive and facile synthesis of some functionalized bis-heterocyclic compounds containing a thieno[2,3-b]thiophene motif全面、简单的合成一些功能化bis-heterocyclic化合物包含thieno[2,3 b]噻吩主题
Int. J. Mol. Sci. 2012, 13, 2263-2275; doi:10.3390/ijm OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 /journal/ijms Article Comprehensive and Facile Synthesis of Some Functionalized Bis-Heterocyclic Compounds Containing a Thieno[2,3-b]thiophene Motif Yahia N. Mabkhot *, Assem Barakat *, Abdullah M. Al-Majid and Saeed A. Alshahrani Department of Chemistry, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mails: amajid@.sa (A.M.A.-M.); saddah096@ (S.A.A.) * Authors to whom correspondence should be addressed; E-Mails: yahia@.sa (Y.N.M.); ambarakat@.sa (A.B.); Tel.: +96614675884; Fax: +96614675992. Received: 6 January 2012; in revised from: 9 February 2012 / Accepted: 13 February 2012 / Published: 20 February 2012 Abstract: A comprehensive and facile method for the synthesis of new functionalized bis-heterocyclic compounds containing a thieno[2,3-b]thiophene motif is described. The hitherto unknown bis-pyrazolothieno[2,3-b]thiophene derivatives 2a–c, bis-pyridazin othieno[2,3-b]thiophene derivatives 4, bis-pyridinothieno[2,3-b]thiophene derivatives 6a,b, and to an analogous bis-pyridinothieno[2,3-b]thiophene nitrile derivatives 7 are obtained. Additionally, the novel bis-pyradazinonothieno[2,3-b]thiophene derivatives 9, and nicotinic acid derivatives 10, 11 are obtained via bis-dienamide 8. The structur
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