[Retracted] Microwave Mediated Organic Reaction: A Convenient Approach for Rapid and Efficient Synthesis of Biologically Active Substituted 1,3-Dihydro-2H-indol-2-one Derivatives

Table 3

Characterization data of the titled compounds (M₁–M₈).

Compound code	MF	MW	IR, NMR, and mass
M1	C19H20N4O3	352.38	IR (cm^−1): 1728 (C=O), 1602 (C=N), 1462 (C=C), 1527 and 1352 (NO2). ^1H NMR 𝛿 (ppm): 0.97–1.15 (t, 6H, N(CH2CH3)2), 2.50–2.65 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 6.56–7.69 (m, 8H, Ar–H). 𝑚/𝑧: 352.38.
M2	C19H20ClN3O	341.83	IR (cm^−1): 1728 (C=O), 1602 (C=N), 1462 (C=C), 759 (C–Cl). ^1H NMR 𝛿 (ppm): 0.97–1.15 (t, 6H, N(CH2CH3)2), 2.50–2.65 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 6.56–7.69 (m, 8H, Ar–H). 𝑚/𝑧: 342.
M3	C19H20FN3O	325.38	IR (cm^−1): 1716 (C=O), 1612 (C=N), 1444 (C=C), 1097 (C–F). ^1H NMR 𝛿 (ppm): 1.31 (t, 6H, N(CH2CH3)2), 2.57 (q, 4H, N(CH2CH3)2), 3.28 (s, 2H, CH2), 6.49–7.91 (m, 8H, Ar–H).
M4	C19H20BrN3O	386.28	IR (cm^−1): 1728 (C=O), 1602 (C=N), 1462 (C=C), 759 (C–Br). ^1H NMR 𝛿 (ppm): 0.97–1.15 (t, 6H, N(CH2CH3)2), 2.50–2.65 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 6.56–7.69 (m, 8H, Ar–H).
M5	C19H21N3O2	323.38	IR (cm^−1): 1728 (C=O), 1604 (C=N), 1467 (C=C), 3630 (–OH). ^1H NMR 𝛿 (ppm): 1.05–1.13 (t, 6H, N(CH2CH3)2), 2.60–2.65 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 4.61 (s, 1H, OH). 𝑚/𝑧: 324.
M6	C20H23N3O2	337.41	IR (cm^−1): 1726 (C=O), 1600 (C=N), 1467 (C=C), 1290–1250 cm^−1 (–OCH3). ^1H NMR 𝛿 (ppm): 0.97–1.15 (t, 6H, N(CH2CH3)2), 2.50–2.65 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 3.94 (s, 3H, OCH3).
M7	C19H22N4O	322.40	IR (cm^−1): 1728 (C=O), 1602 (C=N), 1462 (C=C), 1600 (NH2). ^1H NMR 𝛿 (ppm): 1.01–1.09 (t, 6H, N(CH2CH3)2), 2.50–2.63 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 3.81 (s, 2H, NH2). 𝑚/𝑧: 323.
M8	C20H23N3O	321.41	IR (cm^−1): 1728 (C=O), 1604 (C=N), 1464 (C=C). ^1H NMR 𝛿 (ppm): 0.98–1.13 (t, 6H, N(CH2CH3)2), 2.50–2.66 (q, 4H, N(CH2CH3)2), 4.48 (s, 2H, CH2), 3.86 (s, 3H, –CH3).