4-Chloro-2-[(ethoxycarbonyl)amino]benzonitrile → 3-Amino-6-chloro-1-ethoxycarbonyl-2-(4-methylthiobenzoyl)indole

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The title compound was prepared according to the procedure described in step 2 of Example 1 from 4-chloro-2-(ethoxycarbonylamino)benzonitrile (Example 1, step 1) and 2-bromo-4′-methylthioacetophenone (Cutler et al., J. Am. Chem. Soc., 1952, 74, 5475). 1H-NMR (CDCl3) δ: 8.25 (1H, d, J=1.8 Hz), 7.67 (2H, d, J=8.4 Hz), 7.53 (1H, d, J=8.4 Hz), 7.31-7.23 (3H, m), 5.75 (2H, br s), 3.82 (2H, q, J=7.0 Hz), 2.51 (3H, s), 0.89 (3H, t, J=7.0 Hz)

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