2-Methoxyethanol → 1-broMo-4-((2-Methoxyethoxy)Methyl)benzene

Temperature

60 °C

2-Methoxyethanol (5.0 g) was added to a stirred suspension of sodium hydride (2.64 g of a 60% mineral oil suspension) in DMF (200 ml) at ambient temperature and under an atmosphere of argon. The stirred mixture was heated to 60° C. and then cooled to 5° C. Solid 4-bromobenzyl bromide (15 g) was added in one portion. The mixture was stirred for 12 hours at ambient temperature, then for 1 hour at 60° C. and cooled. The mixture was diluted with iced water (600 ml) and extracted with ethyl acetate (3×200 ml). The ethyl acetate extracts were combined, washed with 2M aqueous hydrochloric acid (100 ml), water (2×100 ml), saturated brine (100 ml), dried (MgSO4) and evaporated. The residue, an oil, was distilled using a short path distillation apparatus (furnace temperature 125° C./0.05 bar) to give 1-(4-bromobenzyloxy)-2-methoxyethane (9.8 g); NMR (CDCl3): 3.39(3H,s), 3.51(4H,m), 4.51(2H,s), 7.21(2H,d) and 7.44(2H,d).

1. temperaturecooled to 5° C
2. waitfor 1 hour at 60° C.
3. temperaturecooled
4. extractionextracted with ethyl acetate (3×200 ml)
5. washwashed with 2M aqueous hydrochloric acid (100 ml), water (2×100 ml), saturated brine (100 ml)
6. dry with materialdried (MgSO4)
7. customevaporated
8. distillationThe residue, an oil, was distilled
9. distillationa short path distillation apparatus (furnace temperature 125° C./0.05 bar)

ORD record

ord-68573073c41f4784bafea14e47065ac1

Source dataset

uspto-grants-1999_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05919793