Isopropanol → trans-2-(2-Chlorophenylamino)cyclohexanol

Temperature

90 °C

A 15 mL screw top test tube fitted with a PTFE septum cap was purged with argon before addition of CuI (5.0 mg, 0.026 mmol, 2.6 mol %), NaOH (125 mg, 3.12 mmol) and rac-2-amino-1-cyclohexanol HCl (158 mg, 1.04 mmol). 2-Chloro-1-iodobenzene (152 μL, 1.25 mmol) and isopropyl alcohol (1.0 mL) were added, via syringe, under argon. The septum cap was replaced with a solid, Teflon-lined cap and the reaction was stirred magnetically at 90° C. for 48 h. The resulting homogeneous solution was allowed to cool before dilution with 10 mL brine. The reaction mixture was transferred to a separatory funnel and extracted with methylene chloride (3×10 mL). The organics were washed with brine, dried over MgSO4 and concentrated. The crude material was purified by silica gel chromatography using hexanes/ethyl acetate (60:40). The product was obtained as a yellow oil in 91% yield (212.7 mg).

1. customcap
2. customThe septum cap
3. customlined cap
4. customThe reaction mixture was transferred to a separatory funnel
5. extractionextracted with methylene chloride (3×10 mL)
6. washThe organics were washed with brine
7. dry with materialdried over MgSO4
8. concentrationconcentrated
9. customThe crude material was purified by silica gel chromatography
10. customThe product was obtained as a yellow oil in 91% yield (212.7 mg)

ORD record

ord-5904c8bb0fb74a948fc75f0e7e0db299

Source dataset

uspto-grants-2006_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07115784B2