反应详情

A solution of (2,4-bis-benzyloxy-5-isopropenyl-phenyl)-{4-[2-(2-methoxy-ethoxy)-ethoxy]-1,3-dihydro-isoindol-2-yl}-methanone in methanol (5 mL) was hydrogenated at atmospheric pressure over 10% palladium on charcoal (12 mg) for 3 hours. A further portion of catalyst (12 mg) was added and hydrogenation continued for a further 7 hours. The mixture was filtered through Celite, eluting with methanol, then the filtrate was concentrated in vacuo to give a residue which was purified by preparative HPLC (basic method). This afforded the title compound as a white solid (17 mg, 16% over two steps). 1H NMR (methanol-d4) 7.25 (1H, t), 7.17 (1H, s), 6.95-6.82 (2H, m), 6.37 (1H, s), 4.89 (2H, br.s), 4.83 (overlaps with H2O, br.s), 4.16 (2H, br.s), 3.82 (2H, br.s), 3.66 (2H, br.s), 3.52 (2H, br.s), 3.39-3.28 (overlaps with MeOH, m), 3.20 (1H, sept), 1.21 (6H, d). MS: [M+H]+ 416.

1. filtrationThe mixture was filtered through Celite
2. washeluting with methanol
3. concentrationthe filtrate was concentrated in vacuo
4. customto give a residue which
5. customwas purified by preparative HPLC (basic method)