Abstract
A mixture of β-naphthol, araldehydes, and urea in the presence of a catalytic amount of iodine as catalyst under solvent-free condition was heated for 5 min on a preheated hot plate to get the corresponding 1,2-dihydro-1-aryl-naphtho[1,2-e][1,3]oxazine-3-ones in very good yield.
Notes
a Isolated yield.
b 4c, 4d, 4e, and 4f were characterized by comparision on TLC and by their melting points with authentic samples prepared by the reported method.[ Citation 8 ]
c Novel compounds 4g, 4a, and 4b were characterized by 1H NMR spectral analysis.