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A solution of 7 (12 g, 53.1 mmol) in 95% EtOH (180 mL) was hydrogenated over 10% Pd.C (600 mg) at room temperature using an H2 filled balloon (overnight). The reaction mixture was filtered and taken to dryness to give a 8 as a clear oil80 (11.9 g, 98%). 1H NMR (CDCl3) δ 8.05 (1H, d, J=7.8 Hz), 7.86 (1H, dd, J=2.7, 7.6 Hz), 7.75 (1H, d, J=7.6 Hz), 7.35˜7.58 (4H, m), 4.17 (2H, q, J=7.1 Hz), 3.44 (2H, t, J=8.1 Hz), 2.77 (2H, t, J=8.3 Hz), 1.26 93H, t, J=7.1 Hz).

1. customat room temperature
2. customan H2 filled balloon (overnight)
3. filtrationThe reaction mixture was filtered
4. customto give a 8 as a clear oil80 (11.9 g, 98%)