Water → (S)-2-Amino-2-cyclohexylethanol

Temperature

80 °C

To a stirred mixture of LiAlH4 (724 mg, 19.08 mmol) in anhydrous THF (20 mL) at rt was added portionwise L-(+)-2-cyclohexylglycine (1 g, 6.36 mmol). The mixture was heated at 80° C. for 4 h. The mixture was cooled to 0° C. and then water (1 mL), 1M aq NaOH (1 mL), and water (3 mL) were added sequentially. The mixture was filtered and the filtrate was partitioned between a mixture of DCM, 1M aq NaOH, and saturated aq sodium potassium tartrate. The organic layer was separated and further washed with 1M aq NaOH. The organic layer was separated, dried over MgSO4, filtered, and concentrated under reduced pressure to afford (S)-2-amino-2-cyclohexylethanol (500 mg) which was not purified further. LCMS (ESI) m/z 144 (M+H)+.

1. temperatureThe mixture was cooled to 0° C.
2. filtrationThe mixture was filtered
3. customthe filtrate was partitioned between a mixture of DCM, 1M aq NaOH, and saturated aq sodium potassium tartrate
4. customThe organic layer was separated
5. washfurther washed with 1M aq NaOH
6. customThe organic layer was separated
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure

ORD record

ord-d7a315a4b5ad43d38cc69765b0fd432f

Source dataset

uspto-grants-2015_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08952058B2