反应详情

To a solution of (E)-5-(4-bromo-3-fluorophenyl)pent-4-enoic acid from step L1 (420 mg, 1.54 mmol) in 2-propanol (5 mL), was added sulfide platinum 5 weight % on carbon (100 mg, 0.513 mmol). The mixture was stirred under a hydrogen filled balloon for 3 h. The solid was filtered off. The filtrate concentrated in vacuo to afford 5-(4-bromo-3-fluorophenyl)pentanoic acid (400 mg, 1.45 mmol, 95% yield). 1H NMR (500 HMz, chloroform-d) δ 7.45 (dd, J=8.0, 7.4 Hz, 1H), 6.96 (dd, J=9.7, 1.9 Hz, 1H), 6.86 (dd, J=8.1, 1.5 Hz, 1H), 2.66-2.60 (m, 2H), 2.43-2.38 (m, 2H), 1.72-1.64 (m, 4H).

1. filtrationThe solid was filtered off
2. concentrationThe filtrate concentrated in vacuo