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This compound was prepared, starting from compound 59 (500 mg, 1.97 mmol), according to the procedure developed for compound 64. Reaction time at room temperature: 18 h to give compound 65 (444 mg, 1.25 mmol) as a yellow oil. Yield 64%; IR (CCl4) ν 1172, 1289, 1367, 1500, 1549, 1716, 2977 cm−1; 1H NMR (200 MHz, CDCl3) δ 1.00 (t, 3H, J=7.1 Hz), 1.36 (s, 9H), 2.60 (m, 4H), 2.89 (t, 2H, J=5.6 Hz), 3.13 (q, 2H, J=5.9 Hz), 4.13 (t, 2H, J=5.6 Hz), 7.51 (m, 2H), 8.05 (dd, 1H, J=2.4, 3.4 Hz); ESI-MS m/z 355.1 [M+H]+.

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