%0 Journal Article
%T Synthesis of new condensed coumarin derivatives
%A Deki£¿ Stojadin V.
%A Deki£¿ Vidoslav S.
%A Vu£¿i£¿ Branimirka
%A Deki£¿ Biljana R.
%J Facta Universitatis Series : Physics, Chemistry and Technology
%D 2007
%I University of Ni?
%R 10.2298/fupct0701085d
%X Reactions of 4-chloro-2-oxo-2H-chromene-3-carbonitrile (1) with 4-methylpyridin- 2-ylamine (2) and 6-methoxy-benzothiazol-2-ylamine (3) in acetonitrile containing a catalytic amount of triethylamine gave the new coumarin derivatives 7-imino-10-methyl-7H- 5-oxa-7a,12-diaza-benzo[a]anthracen-6-one (4) and 7-imino-10-methoxy-7H-5-oxa-12- thia-7a,13-diaza-indeno[1,2-b]phenanthren-6-one (5) in 52 and 39% yields, respectively. The novel compounds were subjected to acid hydrolysis giving the corresponding oxoderivatives 10-methyl-5-oxa-7a,12-diaza-benzo[a]anthracene-6,7-dione (6) and 10- methoxy-5-oxa-12-thia-7a,13-diaza-indeno[1,2-b]phenanthrene-6,7-dione (7) in 64 and 58% yields, respectively. The structural assignments of the synthesized compounds were based on elemental analyses, IR and proton NMR spectra. .
%K synthesis
%K hydrolysis
%K structural determination
%U http://www.doiserbia.nb.rs/img/doi/0354-4656/2007/0354-46560701085D.pdf