反应详情

A solution of 3-(4-tert-Butoxycarbonylmethoxy-3-chloro-phenyl)-propionic acid benzyl ester (step 2) (6.35 g, 15.7 mmol) in THF (60 ml) was added to a suspension of palladium on activated carbon (10% wt, 0.84 g, 0.78 mmol) in THF (35 ml) under an inert atmosphere. The resultant mixture was placed under an atmosphere of hydrogen (0.35 bar) for 3 h. The reaction mixture was filtered through Celite® (filter material) and washed through with THF (100 ml). The filtrate was concentrated in vacuo to afford the title compound as a yellow oil; 1H NMR (400 MHz, DMSO-d6) δ 12.15 (1H, s), 7.31 (1H, d), 7.12 (1H, dd), 6.91 (1H, d), 4.74 (2H, s), 2.75 (2H, t), 2.51 (2H, t), 1.38 (9H, s).

1. filtrationThe reaction mixture was filtered through Celite® (filter material)
2. washwashed through with THF (100 ml)
3. concentrationThe filtrate was concentrated in vacuo