2,3-Dihydroquinazolin-4(1H)-ones: visible light mediated synthesis, solvatochromism and biological activity.

The photochemical synthesis of a series of 2,3-dihydroquinazolin-4(1H)-ones were evaluated under the irradiation of visible light (>390nm). The effect of the visible light mediated synthesis was carried out in the presence/absence of solvent. The effect of solvent plays a key role in the synthesis was evidenced through the formation of product in short duration. The solvatochromic effects of the fluorescent compounds (3a-k) were studied with respect to the solvents of increasing polarity (DCM