Synthesis of Bis-2,3-dihydroquinazolin-4(1H)-ones and 2,3-Dihydroquinazolin-4(1H)-ones Derivatives with the Aid of Silica-Supported Preyssler Nanoparticles

Table 3

Synthesis of 2-Substituted 2,3-dihydroquinazolin-4(1H)-ones derivatives by in the presence of silica-supported preyssler nanoparticles and water as solvent under reflux conditions.

Entry	Product	Time (h)	^aYield (%)	Mp (°C)
1		4.5	80	164-165 [34]
2		4	92	165–167 [34]
3		3	93	233-234 [35]
4		3.5	89	209-210 [34]
5		3	87	180-181 [36]
6		2.5	91	206–208 [36]
7		2	94.5	219–222 [36]

 ^aIsolated yield.