4-Acetylbenzenesulphonamide → 4-[3E-(2,4-Dimethoxy-5-pyridin-3-yl-phenyl)-acryloyl]-benzenesulfonamide

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The title compound was prepared by condensing 2,4-dimethoxy-5-pyridin-3-yl-benzaldehyde (Ex-104A) and 4-acetyl-benzenesulfonamide (Ex-26A) in a similar manner as described in Ex-22. Yellow solid, 51% yield, mp 253–255° C. 1H-NMR (DMSO-d6) δ 8.69 (d, J=1 Hz, 1H), 8.50 (d, J=4 Hz, 1H), 8.25 (d, J=9 Hz, 2H), 8.08 (d, J=15 Hz, 1H), 8.02 (s, 1H), 7.84–7.94 (m, 4H), 7.51 (s, 2H), 7.40–7.44 (m, 1H), 6.82 (s, 1H), 3.98 (s, 3H), 3.88 (s, 3H). MS m/z=424([M]+, 45%), 393 (100%). HMRS (EI) calcd. for C22H20N2O5S: 424.1093; found 424.1100.

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