反应详情

To a stirred solution of crude benzyl 2-(4-(1-(tert-butyldimethylsilyloxy)cyclopropyl)-3-fluorophenyl)acrylate (4.14 g) in EtOAc (30 mL) was added 20% Pd(OH)2 (207 mg, 5% moleq.) and stirred under hydrogen gas balloon at RT for 1 h. The Pd(OH)2 was filtered out, filtrate evaporated and resulting residue was purified by silica gel (neutral, 100-200) column using ethyl acetate/PE (3:17) as eluent to get crude 2-(4-(1-(tert-butyldimethylsilyloxy)cyclopropyl)-3-fluorophenyl)propanoic acid (1.8 g, 64% LC-MS, HPLC purity) as off white solid. The crude product on prep HPLC purification provided (1.23 g, 13% yield over 3 steps). [TLC system: EtOAc/PE (1:5), Rf: 0.6].

1. filtrationThe Pd(OH)2 was filtered out
2. customfiltrate evaporated
3. customresulting residue
4. customwas purified by silica gel (neutral, 100-200) column