反应详情

A solution of methyl 2-(9-(4-fluorobenzyl)-2-methyl-1-oxo-4-(p-tolyl)-2,9-dihydro-1H-pyrido[3,4-b]indol-3-yl)-2-hydroxyacetate (42 mg, 0.087 mmol) in t-Butyl acetate (1 mL) was treated with perchloric acid (6.22 μL, 0.103 mmol) and then stirred at room temperature for 1 hour. The mixture was diluted with Ethyl acetate, washed with NaHCO3 and brine, dried over Na2SO4, filtered and concentrated. The residue was purified on silica gel (0-70% ethyl acetate/hexanes) to afford methyl 2-(tert-butoxy)-2-(9-(4-fluorobenzyl)-2-methyl-1-oxo-4-(p-tolyl)-2,9-dihydro-1H-pyrido[3,4-b]indol-3-yl)acetate as a white solid (30 mg, 0.055 mmol, 64% yield). 1H NMR (400 MHz, CHLOROFORM-d) ppm 7.25-7.47 (m, 8H) 6.88-7.00 (m, 3H) 6.57-6.63 (m, 1H) 6.19-6.22 (m, 1H) 6.11-6.17 (m, 1H) 5.29 (s, 1H) 3.79 (s, 3H) 3.78 (s, 3H) 2.54 (s, 3H) 1.04 (s, 9H); LCMS (m/z) ES+=541 (M+1).

1. washwashed with NaHCO3 and brine
2. dry with materialdried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated
5. customThe residue was purified on silica gel (0-70% ethyl acetate/hexanes)