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  • Title: A novel and expedient approach to new thiazoles, thiazolo[3,2-a]pyridines, dihydrothiophenes, and hydrazones incorporating thieno[2,3-b]thiophene moiety.
    Author: Mabkhot YN, Barakat A, Al-Majid AM, Alamary AS, Al-Nahary TT.
    Journal: Int J Mol Sci; 2012; 13(4):5035-5047. PubMed ID: 22606028.
    Abstract:
    This paper reports details about the synthesis of a series of novel functionalized symmetrical bis-heterocyclic compounds containing a thieno[2,3-b]thiophene motif. Bis-thiazole derivatives 2, 3a-c and thiazolo[3,2-a]pyridine derivatives 4a-c are achieved. The hitherto unknown dihydrothiophene derivatives 6a-dvia bis-pyridimium salt 5 are obtained. Additionally, the novel hydrazonothieno[2,3-b]thiophene derivatives 10a-c are obtained via bis-tosylacetylthieno[2,3-b]thiophene derivative 9. All compounds are characterized by (1)H-, (13)C-NMR, GCMS, IR, and UV-vis spectrometry. These compounds represent a new class of sulfur and nitrogen containing heterocycles that should also be of interest as new materials.
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