Oxalyl chloride → 3-(4-(2-Chlorophenyl)-9-methoxy-1,3-dioxo-2,3-dihydropyrrolo[3,4-c]carbazol-6 (1H)-yl)-N-[2-(1H-imidazol-5-yl)ethyl]propanamide

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Reaction of acid (117) prepared as described in example 230 with oxalyl chloride followed by histamine using the procedure described in example 207 gave the amide (128) (81%) as a yellow powder, mp 144–149° C. (dec). 1H NMR δ [(CD3)2SO] 11.12 (br, 1H), 8.52 (d, J=2.6 Hz, 1H), 7.91 (t, J=5.5 Hz, 1H), 7.76 (s, 1H), 7.69 (d, J=9.0 Hz, 1H), 7.58 (m, 1H), 7.52–7.42 (m, 4H), 7.32 (dd, J=9.0, 2.6 Hz, 1H), 6.56 (s, 1H), 4.69 (t, J=6.4 Hz, 2H), 3.90 (s, 3H), 3.12 (m, 2H), 2.58 (t, J=6.4 Hz, 2H), 2.39 (t, J=7.4 Hz, 2H). Found: C, 60.73; H, 4.49; N, 11.49. C29H24ClN5O4. 1/2CH2Cl2 requires C, 60.62; H, 4.31; N, 11.98.

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