反应详情

温度

-78 °C

A −78° C. 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)acetate (45 mg, 0.096 mmol) in Tetrahydrofuran (THF) (1 mL) was treated with LiHMDS (0.207 mL, 0.207 mmol) and then stirred at −78° C. for 20 minutes. A solution of (1R)-(−)-(10-Camphorsulfonyl)oxaziridine (71.1 mg, 0.310 mmol) in Tetrahydrofuran (THF) (1 mL) was added and the mixture was then warmed to 0° C. for 20 minutes. The mixture was treated with HCl (1M) until pH<2 and then extracted with ethyl acetate. The combined extracts were washed with brine, dried over Na2SO4, filtered and concentrated. The residue was purified on silica gel (0-100% ethyl acetate/hexanes) to afford 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, 90% yield) as a white solid. 1H NMR (400 MHz, CHLOROFORM-d) ppm 7.30-7.45 (m, 5H) 7.16-7.26 (m, 2H) 6.89-7.02 (m, 3H) 6.54-6.63 (m, 1H) 6.29-6.37 (m, 1H) 6.13-6.24 (m, 1H) 6.01-6.11 (m, 1H) 5.34-5.42 (m, 1H) 3.81 (s, 3H) 3.70 (s, 3H) 2.51 (s, 3H); LCMS (m/z) ES+=485 (M+1).

1. temperaturethe mixture was then warmed to 0° C. for 20 minutes
2. extractionextracted with ethyl acetate
3. washThe combined extracts were washed with brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified on silica gel (0-100% ethyl acetate/hexanes)