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This compound was prepared, starting from compound 70 (150 mg, 0.30 mmol), according to the procedure developed for compound 11. Reaction time at room temperature: 12 h to give compound 71 (127 mg, 0.23 mmol) as a very hygroscopic beige solid. Yield 77%; mp 157-159° C.; IR (KBr) ν 1124, 1186, 1241, 1312, 1457, 1545, 1653, 2612, 3221 cm−1; 1H NMR (200 MHz, DMSO-d) δ 1.32 (t, 3H, J=7.0 Hz), 3.44 (m, 4H), 3.74 (m, 4H), 4.58 (t, 2H, J=4.5 Hz), 7.29 (ddd, 1H, 5JH-F=0.6 Hz, J=5.1, 7.7 Hz), 7.82 (m, 6H), 8.47 (s, 1H), 8.52 (s, 1H), 9.16 (te, 1H, J=4.9 Hz), 10.82 (se, 1H).

1. customThis compound was prepared
2. customReaction time at room temperature