Ammonia → 3-(1-Aminoethyl)phenol

Temperature

77.5 °C

A mixture of 1000 ml of methanolic ammonia, 100 g of 3-hydroxyacetophenone, 25 g of molecular sieves and 10 g of Raney nickel was taken in an autoclave flask at 0-5° C. The autoclave flask was then closed and stirred for 6 h at 75-80° C. without applying hydrogen gas pressure. The reaction mass was further hydrogenated at 75-80° C. by applying 15-20 kg/cm2 pressure of hydrogen gas and the reaction mixture was allowed to stir while maintaining the same conditions of temperature and pressure for 18-22 h. After the completion of the reaction, the reaction mixture was cooled to room temperature and filtered through hyflo bed. The hyflo bed was washed with 200 ml methanol and the solvent distilled off, under reduced pressure at a temperature of 60° C. The reaction mass was cooled to 0-5° C. and stirred for 1 h to obtain a slurry. The solid thus obtained was filtered, washed with ethyl acetate and dried to obtain the title compound.

1. customwas taken in an autoclave flask at 0-5° C
2. customThe autoclave flask was then closed
3. customwas further hydrogenated at 75-80° C.
4. stirringto stir
5. temperaturewhile maintaining the same conditions of temperature and pressure for 18-22 h
6. customAfter the completion of the reaction
7. temperaturethe reaction mixture was cooled to room temperature
8. filtrationfiltered through hyflo bed
9. washThe hyflo bed was washed with 200 ml methanol
10. distillationthe solvent distilled off, under reduced pressure at a temperature of 60° C
11. temperatureThe reaction mass was cooled to 0-5° C.
12. stirringstirred for 1 h
13. customto obtain a slurry
14. customThe solid thus obtained
15. filtrationwas filtered
16. washwashed with ethyl acetate
17. customdried

ORD record

ord-640c172eb7a24180b48c3fdddb1b3ba2

Source dataset

uspto-grants-2013_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08420846B2