反应详情

To a solution of lithium aluminum hydride, 1.0 M solution in tetrahydrafuran (1.165 mL, 1.165 mmol) in 7 mL THF at 0° C. was added a solution of (S)-1-tert-butyl 2-methyl 4-(3-fluoro-4-(5-(1-phenylcyclopropyl)thiazolo[5,4-b]pyridine-2-yl)phenyl)-1H-pyrrole-1,2(2H,5H)-dicarboxylate (0.555 g, 0.971 mmol) dropwise via syringe, over 5 min. The reaction mixture became a deep purple color. The bath was removed, and after 30 min, the reaction mixture was re-cooled, and treated with ice carefully. 6 mL 1N aq. HCl was added and the aq. Layer was extracted with DCM. The combined organics were dried over sodium sulfate, filtered, and concentrated in vacuo. Purification by silica gel chromatography, 0-100% EA/hexanes gradient gave (2S,4S)-tert-butyl 4-(3-fluoro-4-(5-(1-phenylcyclopropyl)-thiazolo[5,4-b]pyridine-2-yl)phenyl)-2-(hydroxymethyl)pyrrolidine-1-carboxylate. MS (ESI) m/z: Calculated: 545.2; Observed: 546.1 (M++1).

1. customThe bath was removed
2. waitafter 30 min
3. temperaturethe reaction mixture was re-cooled
4. additiontreated with ice carefully
5. addition6 mL 1N aq. HCl was added
6. extractionthe aq. Layer was extracted with DCM
7. dry with materialThe combined organics were dried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo
10. customPurification by silica gel chromatography, 0-100% EA/hexanes gradient