7-Benzyl-6-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-6,7-dihydro-thieno[2,3-b]pyridine-5-carbonitrile → 7-Benzyl-3-methyl-6-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-6,7-dihydro-thieno[2,3-b]pyridine-5-carbonitrile

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This compound was prepared from 7-benzyl-4-chloro-6,7-dihydro-3-methyl-6-oxo-thieno[2,3-b]pyrdine-5-carbonitrile (65) by applying the same method as described for the preparation of 7-benzyl-6-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-6,7-dihydro-thieno[2,3-b]pyridine-5-carbonitrile (66). Yield 25%; MP 223° C. 1H-NMR (DMSO-d6) δ 2.48 (d, J=0.8 Hz, 3H), 3.50 (m, 4H), 3.86 (b, 4H), 5.30 (s, 2H), 6.99 (d, J=1.2 Hz, 1H), 7.16 (m, 1H), 7.30 (m, 5H), 7.47 (dd, J=0.8, 3.6 Hz, 1H), 7.80 (dd, J=1.2, 5.2 Hz, 1H) ppm; EIMS m/z 475 (M+1).

Provenance & Evidence