Ethanolamine → 2-[(Cyclohexylmethyl)amino]ethan-1-ol

Temperature

75 °C

A mixture of cyclohexylmethylbromide (23.2 g, 131 mmol) and ethanolamine (47.9 g, 786 mmol) in EtOH (131 mL) was heated at 75° C. for 2 hours. NMR analysis of an aliquot showed the reaction was complete. The reaction was then concentrated to remove ethanol and the resulting residue was diluted with DCM. The organic layer was washed successively with water (3×100 mL) and brine (100 mL) and then dried over sodium sulfate, filtered, and concentrated to give the title intermediate as a light yellowish oil (10.57 g). (m/z): [M+H]+ calcd for C9H19NO 158.16; found 158.2. 1H NMR (CDCl3, 300 MHz) δ (ppm): 3.59 (t, J=5.4 Hz, 2H), 2.73 (t, J=5.4 Hz, 2H), 2.42 (d, J=6.6 Hz, 2H), 1.6-1.77 (m, 6H), 1.36-1.6 (m, 1H), 1.10-1.28 (m, 2H), 0.82-0.95 (m, 2H).

1. concentrationThe reaction was then concentrated
2. customto remove ethanol
3. additionthe resulting residue was diluted with DCM
4. washThe organic layer was washed successively with water (3×100 mL) and brine (100 mL)
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated

ORD record

ord-f92e3015333f4683b55fb42e658f3fc2

Source dataset

uspto-grants-2009_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07622508B2