Hydrogen Peroxide → HCID 58573203, compound

Temperature

2.5 °C

To a solution of (2S,3R)-3-(3-chlorophenyl)-2-(4-chlorophenyl)-N-isopropylhex-5-en-2-amine (Example 418, Step E, 160 mg, 0.442 mmol) in THF (4 mL) cooled by an ice-water bath was added borane-tetrahydrofuran complex, (1.0M in THF, 2.21 mL, 2.21 mmol). After 90 minutes, an additional 5 equivalents of borane-THF were added and the cold bath removed. After 30 minutes the reaction was cooled in an ice-water bath and quenched by addition of 0.5 mL water followed by 4N aqueous sodium hydroxide (1.1 mL, 4.42 mmol) and aqueous hydrogen peroxide solution, (30% (w/w), 0.45 mL, 4.42 mmol). The biphasic mixture was stirred rapidly at 0-5° C. for 15 minutes then partitioned between water and ethyl acetate. The aqueous layer was extracted again with ethyl acetate. The combined organic layers were washed with brine then dried with anhydrous magnesium sulfate and concentrated to afford a colorless oil. The product was isolated by chromatography on silica (24 g RediSep® pre-packed silica gel column (Teledyne Isco, Lincoln, Nebr.)) eluting with 50 to 100% ethyl acetate gradient in hexane to afford the title compound as a colorless oil.

1. customthe cold bath removed
2. temperatureAfter 30 minutes the reaction was cooled in an ice-water bath
3. customquenched by addition of 0.5 mL water
4. customthen partitioned between water and ethyl acetate
5. extractionThe aqueous layer was extracted again with ethyl acetate
6. washThe combined organic layers were washed with brine
7. dry with materialthen dried with anhydrous magnesium sulfate
8. concentrationconcentrated
9. customto afford a colorless oil
10. customThe product was isolated by chromatography on silica (24 g RediSep® pre-packed silica gel column (Teledyne Isco, Lincoln, Nebr.))
11. washeluting with 50 to 100% ethyl acetate gradient in hexane

ORD record

ord-211aa8722db640a7bd58ab063219f177

Source dataset

uspto-grants-2016_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09296736B2