Hydrogen Peroxide → tert-Butyl 3-(hydroxymethyl)-8-azabicyclo[3.2.1]octane-8-carboxylate

To a solution of tert-butyl 3-methylidene-8-azabicyclo[3.2.1]octane-8-carboxylate (0.8 g, 3.6 mmol) in dry THF (30 mL) at 0° C. was added a solution of borane-THF complex (4.7 mL, 1 M) and the resulting reaction was allowed to stir at room temperature for 48 hrs. The reaction was cooled to 0° C. then treated with NaOH (5.4 mL, 2 M) and hydrogen peroxide solution (1.8 mL, 35%). After stirring at room temperature for 3 hrs, the resulting mixture was extracted with ethyl acetate (50 mL×3). The combined organic layers were washed with brine (50 mL×3), dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by SGC (eluting with petroleum ether/ethyl acetate=20/1) to give the desired product (0.9 g, 90%). LCMS (ESI) m/z: 239.9 [M−H]−.

1. customthe resulting reaction
2. temperatureThe reaction was cooled to 0° C.
3. stirringAfter stirring at room temperature for 3 hrs
4. extractionthe resulting mixture was extracted with ethyl acetate (50 mL×3)
5. washThe combined organic layers were washed with brine (50 mL×3)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customThe residue was purified by SGC (eluting with petroleum ether/ethyl acetate=20/1)

ORD record

ord-1a1a72719f894b0587f0c0fa31c515d9

Source dataset

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08933236B2