反应详情

To a solution of 279 dissolved in dichloromethane (1 mL) was added trifluoroacetic acid (100 μl) and triethylsilane (200 μl). The reaction mixture was stirred at room temperature for ½ hours under an inert atmosphere then concentrated in vacuo. The residue was dissolved in DMSO (1 mL) and purified by prep-HPLC to remove Ph3PO. The crude mixture was diluted with EtOAC and extracted with 1N HCl. The aqueous phase containing product 280 was re-purified by HPLC to afford 5-(3,5-dimethyl-isoxazol4-yl)-7-(4-fluoro-benzyl)-9-hydroxy-6,7-dihydro-pyrrolo[3,4-g]quinolin-8-one 280, (0.4 mg) as a TFA salt solid: 1H NMR (CD3OD) δ 9.0 (d, 1H), 8.1 (d, 1H), 8.0 (s, 1H), 7.7 (m, 1H), 7.4 (dd, 1H), 7.1 (t, 2H), 4.8 (s, 2H), 4.2(s, 2H), 2.0 (s, s, 2×3H); MS: 404 (M+1). HPLC conditions: mobile phase A was 0.1% TFA in water, mobile phase b was 0.1% TFA in CH3CN; gradient from 5% to 60% B in 20 min; flow rate was 20 mL/min; column was Phenomenex, luna 5μ, C18 (2), 150 mm×21.1 mm.

1. concentrationthen concentrated in vacuo
2. dissolutionThe residue was dissolved in DMSO (1 mL)
3. custompurified by prep-HPLC
4. customto remove Ph3PO
5. additionThe crude mixture was diluted with EtOAC
6. extractionextracted with 1N HCl
7. additionThe aqueous phase containing product 280
8. customwas re-purified by HPLC