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Part-IIIResults and DiscussionS. No R X MolFormula(Sol. of Recryst.)VIIviO C 16 H 1 4N 2 O 3O(E)VIIvii O C 22 H 18 N 2 O 2(E)M.P.( o C)IR (cm -1 )(KBr)>280 3411(γ NH ),2965(γ CH ),1710(γ CO ),1652(γ CONH ).226-228 3369(γ NH ),2990(γ CH ),1714(γ CO ).Mass(m/e)NMR (δppm)(DMSO-d 6 )-- ---- --VIIviiiOO C 24 H 20 N 2 O 3(E)168-170 3278(γ NH ),2920(γ CH ),1697(γ CO ),1674(γ CONH ).-- 1.72 (s, 3H, CH 3 ), 5.53 (d, 1H, H at 4, J = 2.68), 6.71 (s,1H, NH at 1), 6.81-7.49 (m, 14 H, Ar-H), 8.60 (s, 1H,NH at 3).VIIvixOOO C 20 H 20 N 2 O 4(E)206-208 3233(γ NH ),2941(γ CH ,1697(γ CO ).-- --VIIxHN O C 20 H 17 N 3 O 2(E)268-270 3405(γ NH ),3099(γ CH ),1706(γ CO ).-- --VIIxiCNO C 19 H 15 N 3 O 2(E)192-194 3296(γ NH ),2232(γ CN ),1677(γ CONH ).-- 1.70 (s, 3H, CH 3 ), 5.50 (d, 1H, H at 4, J = 3.24), 7.71(br., 1H, NH at 1), 7.37-7.63 (m, 9H, Ar-H), 9.16 (s,1H, NH at 3).VIIxiiNO 2O C 18 H 15 N 3 O 4(E)240-242 3229(γ NH ),1710(γ CO ),1685(γ CONH ).-- --458