反应详情

5-Methoxy-benzofuran-2-carboxylic acid methyl ester (2.2 g, 10 mmol) and 10% Pd-C (0.44 g) in ethanol (50 mL) were agitated under hydrogen (45 psi) for 72 hrs. The reaction mixture was filtered and the filtrate was concentrated. The residue was chromatographed on silica gel eluting with 8:2 hexane:ethyl acetate to give 1.3 g 5-methoxy-2,3-dihydro-benzofuran-2-carboxylic acid methyl ester

1. filtrationThe reaction mixture was filtered
2. concentrationthe filtrate was concentrated
3. customThe residue was chromatographed on silica gel eluting with 8:2 hexane