4-Acetylbenzoic Acid → 4-[3E-(2-Cyclopropylmethoxy-4-methoxy-5-thiophen-2-yl-phenyl)-acryloyl]-benzoic acid

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The title compound was prepared by condensing 2-cyclopropylmethoxy-4-methoxy-5-thiophen-2-yl-benzaldehyde (Ex-32B) and 4-acetylbenzoic acid in a similar manner as described in Ex-3. Yellow solid, mp 187–191° C. 1H-NMR (DMSO-d6) δ 8.22 (d, 2H), 8.19 (s, 1H), 7.01 (m, 4H), 7.62 (d, 1H), 7.47 (d, 1H), 7.09 (t, 1H), 6.76 (s, 1H), 4.06 (d, 2H), 3.94 (s, 3H), 1.34 (m, 1H), 0.62 (q, 2H), 0.38 (q, 2H). MS m/z=434 ([M]+, 82%), 363 (100%). 10%. Anal. for C25H22O5S. HRMS m/z: calc. 435.1266, found 435.1266.

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