Tetrahedron p. 6565 - 6572 (1995)
Update date:2022-08-04
Topics:
Marcos, Alicia
Pedregal, Carmen
Avendano, Carmen
One-pot annulations between 2-amino-1,4-naphthoquinone (1) and aldehydes or acetals give either 6,13-dihydro-6-azapentacene-5,7,12,14-tetraones (4) or 1H-2,4-dihydronaphthol[2,3-d]1,3-oxazine-5,10-diones (5). These reactions constitute new examples of Hantzsch synthesis of 1,4-dihydropyridines and 6-endo-trig ring closures, respectively.
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Doi:10.1039/jr9510001800
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(2021)Doi:10.1002/hlca.19660490615
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