反应详情

A suspension containing 58 (6.0 g, 12.59 mmol) and palladium dihydroxide (20% Pd(OH)2 on carbon, 50% wet, 3.0 g, 21.43 mmol) dissolved in anhydrous tetrahydrofuran 75 mL) was bubbled with nitrogen for 20 min. The reaction mixture was vacuumed, then charged with H2 gas (45 psi), and allowed to stir at rt for 24 h. The solution was filtered and the filtrate was concentrated in vacuo. The resulting residue was purified by column chromatography eluting with 0-100% ethyl acetate in hexanes to afford the desired product 59 (4.88 g, 80%) as a thick, brown oil: 1H NMR (500 MHz, CDCl3) δ 7.85 (dd, 2H), 7.74 (dd, 2H), 7.35-728 (m, 6H), 7.06 (d, 4H), 3.70 (t, 2H), 3.19 (t, 2H), 2.63-2.56 (m, 4H), 2.00 (d, 2H), 1.73-1.50 (m, 8H); m/z (ESI) 485 [C30H32N2O4+H]+.

1. customwas bubbled with nitrogen for 20 min
2. additioncharged with H2 gas (45 psi)
3. filtrationThe solution was filtered
4. concentrationthe filtrate was concentrated in vacuo
5. customThe resulting residue was purified by column chromatography
6. washeluting with 0-100% ethyl acetate in hexanes