A New Synthesis of Vinyl Phosphonates from α-Phenyl β-Oxo Phosphonates and Dialkyl Phosphite

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• Spectra of Diethyl 2-phenylethenephosphonate (Entry 1); 1H NMR (CDCl3): d 1.30 (t, J = 7.0 Hz, 6H), 4.07 (dq. 4H, J = 7.0 Hz), 6.20 (t, 1H, J = 17.6Hz), 7.31–7.52 (m, 6H); 13C NMR: 16.4 (d, J = 4 Hz), 61.8 (d, J = 4 Hz), 114.0 (d, J = 127 Hz), 127.6, 128.8, 130.0, 134.9 (d, J = 5 Hz), 148.7 (d, J = 4 Hz); IR: 161, 1240, 1163, 1020, 950
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