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Synlett 2001; 2001(9): 1415-1416
DOI: 10.1055/s-2001-16793
DOI: 10.1055/s-2001-16793
letter
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Simple Way to 1H-Benzo[i,j][2,7]naphthyridines
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Publikationsverlauf
Publikationsdatum:
28. August 2001 (online)
Heating of 2,2-dioxoisothiazolo[5,4,3-d,e]quinolines (available from 3-nitroanilines in a simple three-step synthesis) with an excess of bis-functionalized methylene CH acids in the presence of K2CO3 as a base afforded 1H-benzo[i,j][2,7]naphthyridines in good yields.
2,2-dioxoisothiazolo[5,4,3-d,e]quinolines - 1H-benzo[i,j][2,7]naphthyridines - nucleophilic aromatic substitution - condensation - cyclization