Water → tert-Butyl ((3R,4R,5S)-1-(5-amino-2,3-dihydrofuro[2,3-b]pyridin-4-yl)-4-{[tert-butyl(dimethyl)silyl]oxy}-5-methylpiperidin-3-yl)carbamate

温度

80 °C

To a mixture of tert-butyl [(3R,4R,5S)-4-{[tert-butyl(dimethyl)silyl]oxy}-5-methyl-1-(5-nitro-2,3-dihydrofuro[2,3-b]pyridin-4-yl)piperidin-3-yl]carbamate (73.4 mg, 0.144 mmol), iron powder (89.0 mg, 1.59 mmol), and ammonium chloride (151.4 mg, 2.830 mmol) was added EtOH (2.0 mL) followed by water (0.50 mL, 28 mmol). The mixture was stirred at 80° C. for 1 h. The reaction mixture was filtered through a pad of diatomaceous earth. The diatomaceous earth pad was eluted with a 10% aqueous solution of K3PO4 (20 mL), and EtOAc (20 mL). The organic layers were washed with brine (20 mL), dried over Na2SO4, and concentrated to give the crude sub-title compound (67.8 mg). The crude product was used directly in the next step without further purification. LCMS calc. for C24H43N4O4Si (M+H)+: m/z=479.3. found 479.3.

1. filtrationThe reaction mixture was filtered through a pad of diatomaceous earth
2. washThe diatomaceous earth pad was eluted with a 10% aqueous solution of K3PO4 (20 mL), and EtOAc (20 mL)
3. washThe organic layers were washed with brine (20 mL)
4. dry with materialdried over Na2SO4
5. concentrationconcentrated

ORDレコード

ord-9ba2b8e499064a1db1d5c947c3aa09b3

出典データセット

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09200004B2