Synthesis of Xanthene Derivatives having Antispasmodic Action. VII. : Derivatives of Chlorothioxanthene-9-acetic Acids
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DABCO Catalyzed Synthesis of Xanthene Derivatives in Aqueous Media
The reaction of 5,5-dimethylcyclohexane-1,3-dione with various heteroarylaldehydes afforded the corresponding heteroaryl substituted xanthene derivatives 1(a-f). The reaction proceeds via the initial Knoevenagel, subsequent Michael, and final heterocyclization reactions using 1,4-diazabicyclo[2.2.2]octane (DABCO) as a catalyst in aqueous media. The synthesized heteroaryl substituted xanthenes 1...
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Hawk, P. B., Oser, L. B. & Summerson, W. H. (1947). Practical Phyiological Chemi8try, 12th ed., p. 1273. London: J. and A. Churchill Ltd. Koszewski, B. J. (1952). Blood, 7, 1182. Leaf, G. & Neuberger, A. (1947). Biochem. J. 41, 280. Lindon, 0. & Work, E. (1953). Biochem. J. 55, 554. Nath, M. C. & Behki, R. M. (1958). Arch. Biochem. Biophy8. 73, 65. Nath, M. C., Chitale, R. P. & Belavady, B. (19...
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1,3,4,9-tetrahydropyrano[3,4-b]indole-1-acetic acid derivatives are of interest for pharmaceutical research as a core structure for synthesis of biological active substance Etodolac (selective Cyclooxygenase-2 inhibitor, which belongs to the Nonsteroidal Anti-inflammatory Drug, NSAID, that shows a clinically effective analgesic and anti-inflammatory activity). Here the way of synthesis of two 1...
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Displacement reaction of 2,3-dichloroquinoxaline with secondary amines in boiling ethanol afforded it`s mono aminoquinoxaline derivatives. Further reaction of the latter compounds with sodium azide in warm dimethylsulfoxide achieved a group of 4-amino tetrazolo[1,5-a]quinoxaline derivatives. 1HNMR spectra of these compounds are discussed.
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ژورنال
عنوان ژورنال: YAKUGAKU ZASSHI
سال: 1969
ISSN: 0031-6903,1347-5231
DOI: 10.1248/yakushi1947.89.1_112