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Part-IIIExperimentalM.P. : 184-186 o C; Yield 71%.Mol. Formula : C 20 H 18 N 2 O 2 ; Mol. Wt. 318.37IR(KBr) cm -1 : 3232(γ NH ), 2933(γ CH ), 1721(γ CO ), 1678(γ CONH ).17. Synthesis of 5-benzoyl-4-(2-nitrophenyl)-6-methyl-3,4-dihydropyrimidin-2(1H)-one (VIIxvii) from benzoylacetoneA mixture of benzoylacetone (0.0072 mole; 1.17 gm), 2-nitrobenzaldehyde (0.0060 mole;1 gm) and urea (0.006 mole; 0.54 gm) in ethanol (10 ml) were reacted as per procedurefor the compound (VIIi) to 5-benzoyl-4-(2-nitrophenyl)-6-methyl-3,4-dihydropyrimidin-2(1H)-one (VIIxvii).M.P. : 222-224 o C; Yield 72%.Mol. Formula : C 18 H 15 N 3 O4; Mol. Wt. 337.33IR(KBr) cm -1 : 3297(γ NH ), 1691(γ CO ), 1657(γ CONH ).18. Synthesis of 5-benzoyl-6-methyl-4-(3,4,5-trimethoxyphenyl)-3,4-dihydropyrimidin-2(1H)-one(VIIxviii) from benzoylacetoneA mixture of benzoylacetone (0.006 mole; 0.97 gm), 3,4,5-trimethoxybenzaldehyde(0.0050 mole; 1 gm) and urea (0.0075 mole; 0.45 gm) in ethanol (10 ml) were reacted asper procedure for the compound (VIIi) to get of 5-benzoyl-6-methyl-4-(3,4,5-trimethoxyphenyl)-3,4-dihydropyrimidin-2(1H)-one (VIIxviii).M.P. : 222-224 o C; Yield 57%.Mol. Formula : C 21 H 22 N 2 O 5 ; Mol. Wt. 382.41IR(KBr) cm -1 : 3297(γ NH ), 2940(γ CO ), 1702(γ CO ).1 H NMR(DMSO-d 6 )δppm : 1.78 (s, 3H, CH 3 ), 3.75 (s, 9H, (OCH 3 ) 3 ), 5.48 (d, 1H, H at4, J = 2.90), 6.48 (s, 2H, Ar-H of Phenyl), 6.96 (br, 1H, NHat 1), 7.39-7.52 (m, 5H, Ar-H), 8.76 (s, 1H, NH at 3).19. Synthesis of 5-benzoyl-4-(3-hydroxyphenyl)-6-methyl-3,4-dihydro-1H-pyrimidin-2-one (VIIxix) from benzoylacetoneA mixture of benzoylacetone (0.006 mole; 0.97 gm), 3-hydroxybenzaldehyde (0.0050mole; 1 gm) and urea (0.0075 mole; 0.45 gm) in ethanol (10 ml) were reacted as per480