反应详情

To a solution of (R)-2-((2-cyano-3-nitrophenoxy)methyl)-N-(pyridin-4-ylmethyl)piperidine-1-carboxamide (Example 27c, 365 mg, 0.98 mmol) in THF/acetic acid (20 mL, 1:1), was added iron powder (164 mg, 2.94 mmol). The reaction was heated to reflux over 15 min under nitrogen, and stirred at reflux for 30 min. Upon completion, the reaction was cooled to room temperature, concentrated, diluted with ethyl acetate and successively washed a saturated solution of NaHCO3, dried over Na2SO4, filtered, concentrated and flash chromatographed (0-10% methanol in dichloromethane) to provide the desired product (141 mg, 40%). MS=366 (MH+).

1. temperatureThe reaction was heated
2. temperatureto reflux over 15 min under nitrogen
3. temperatureat reflux for 30 min
4. concentrationconcentrated
5. additiondiluted with ethyl acetate
6. washsuccessively washed a saturated solution of NaHCO3
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated
10. customflash chromatographed (0-10% methanol in dichloromethane)