Tetrahedron p. 255 - 274 (1993)
Update date:2022-08-04
Topics:
Lal
Gidwani
Substituted 6-(4,5-dimethoxy-2-vinylphenyl)-2,4-(1H, 3H) pyrimidinediones (2) undergo ring closure in the presence of a mixture of formic acid and orthophosphoric acid, to give 5H-indeno[1,2-d]pyrimidines (3) and/or pyrimido[6,1-a]isoindoles (4). Cyclizat
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(2013)
