Synthesis and spectral study of 3-(3-thienylmethylene)-1H,3H-naphtho-[1,8-c,d]-pyran-1-on
نویسندگان
چکیده
N M Stoyanov, P N Penchev and M N Marinov University of Rousse Branch Razgrad, 3, Aprilsko Vastanie Avenue, 7200 Razgrad Faculty of Chemistry, University of Plovdiv, 24 Tsar Assen Str., BG-4000 Plovdiv, Bulgaria Faculty of Plant Protection and Agroecology, Agricultural University – Plovdiv, 12 "Mendeleev" Blvd, 4000 Plovdiv, Bulgaria *This article is dedicated to Professor George Andreev, University of Plovdiv, on the occasion of his 70 anniversary
منابع مشابه
Synthesis, reactions and biological evaluation of some new naphtho[2,1-b]furan derivatives bearing a pyrazole nucleus.
Vilsmeier formylation of 2-(1-phenylhydrazonoethyl)naphtho[2,1-b]furan (2) gave 3-naphtho[2,1-b]furan-2-yl-1-phenyl-1H-pyrazole-4-carbaldehyde (3), which was reacted with C- and N-nucleophiles to afford naphthofuranpyrazol derivatives 4-8. Treatment of 2-[(3-(naphtho[2,1-b]furan-2-yl)-1-phenyl-1H-pyrazol-4-yl)methylene]-malononitrile (4a) with reactants having active hydrogen and Et₃N gave the ...
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From the cultures of spore-derived mycobionts of the lichen Lecanora leprosa a novel naphtho[1,8-cd]pyran-3-one derivative, lecanopyrone, was isolated. Its structure was determined by spectroscopic methods. The assembly pattern of acetate units in its biosynthesis was verified using sodium [1-13C]-acetate and sodium [1,2-13C2]-acetate.
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BACKGROUND 1,8-Naphthyridine derivatives have attracted considerable attention because the 1,8-naphthyridine skeleton is present in many compounds that have been isolated from natural substances, with various biological activities. FINDINGS N,N-dimethoxy-N-methyl-1,8-naphthyridine-3-carboxamide (1) on reaction with Grignard reagent forms 2-methoxy-1,8-naphthyridine-3-carbaldehyde (2). Compoun...
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