Water → (2R)-2-amino-2-cyclohexylethan-1-ol

Temperatur

80 °C

To a stirred mixture of LiAlH4 (724 mg, 19.08 mmol) in anhydrous THF (20 mL) at rt was added portionwise 2-cyclohexyl-D-glycine (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 was separated, dried over MgSO4, filtered, and concentrated under reduced pressure to afford (R)-2-amino-2-cyclohexylethanol (400 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 was separated
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-83cde45171ba40aca2a6328d929b0118

Quelldatensatz

uspto-grants-2015_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08952058B2