Bis(2-pyridyl) ketone → 2-Heptenoic acid

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Prepared as above from 375.3 mg (0.88 mmol) of the pyridyl ketone and 796.8 mg (1.76 mmol) of the Wittig salt. Preparative HPLC with MeOH-AcOH-CH2Cl2 (4:1:95) yielded 266.2 mg (58%) of the pure (E)-heptenoic acid as a white fluffy sold: mp 48-55° C.; 1H NMR (CDCl3) δ8.60 (br s, 1H), 8.48 (br s, 1H), 8.26 (s, 1H), 8.06 (d, J=8.2 Hz, 2H), 7.48 (br s, 1H), 7.46 (br s, 1H), 7.38-7.25 (m, 6H), 7.27 (d, J=8.2 Hz, 2H), 6.20 (t, J=7.4 Hz, 1H), 4.57 (s, 2H), 3.67 (s, 4H), 2.32 (dd, J=7.1, 6.8 Hz, 2H), 2.20 (ddd, J=7.3, 7.2, 6.8 Hz, 2H), 1.68-1.52 (m, 4H); FDMS 526 (M+1). Anal. (C31H31N3O5) C, H, N.

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