反应详情

温度

70 °C

A mixture of (S)-5-amino-1,3-dihydrospiro[indene-2,3′-pyrrolo[2,3-b]pyridin]-2′(1′H)-one (154 mg, 0.613 mmol, described in Intermediate 3) and 1-(hydroxymethyl)benzotriazole (93 mg, 0.625 mmol) in EtOH (2 mL) and DMF (0.2 mL) was heated at reflux for 4 h, then concentrated to dryness under reduced pressure. The residue was resuspended in THF (3 mL) and sodium borohydride (40 mg, 1.05 mmol) was added. The resulting mixture was heated to 70° C. for 6 h then quenched with H2O (50 mL) and extracted with EtOAc (50 mL). The organic extract was dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by silica gel chromatography, eluting with a gradient of CH2Cl2:MeOH—100:0 to 80:20, to give the title compound, which was of sufficient purity for use in the next step. MS: m/z=266 (M+1).

1. temperaturewas heated
2. temperatureat reflux for 4 h
3. concentrationconcentrated to dryness under reduced pressure
4. customthen quenched with H2O (50 mL)
5. extractionextracted with EtOAc (50 mL)
6. extractionThe organic extract
7. dry with materialwas dried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated in vacuo
10. customThe crude product was purified by silica gel chromatography
11. washeluting with a gradient of CH2Cl2