Triethylamine → HCID 68715983, Verbindung

To a solution of 2-bromo-1,1,1-trifluoroethane (0.74 ml) and triethylamine (1.13 ml) in DMF (30 ml) was added (4-bromobenzyl)-(2-methoxyethyl)amine (2.05 g). The resulting mixture was stirred for 18 h. The mixture was partitioned between ethyl acetate and water, the organic layer was dried and evaporated to an oil, which was purified by column chromatography eluting with a gradient of ethyl acetate (60 to 100%) in isohexane to give (4-bromobenzyl)-(2-methoxyethyl)-(2,2,2-trifluoroethyl) amine (1.84 g). 1H NMR (DMSO-D6) δ 2.1 (bs, 2H), 2.6 (t, 2H), 3.2 (s, 3H), 3.4 (t, 2H), 3.65 (d, 2H), 7.25 (d, 2H), 7.45 (d, 2H). c) (4-Bromobenzyl)-(2-methoxyethyl)amine 2-Methoxyethylamine (16 ml) was added to a solution of 4-bromobenzaldehyde (17.2 g) in THF (150 ml). Glacial acetic acid (5.32 ml) and MgSO4 (0.5 g) were added and the mixture was stirred for 45 min. Sodium triacetoxyborohydride (29.7 g) was added and the resulting mixture was stirred for 4 h. The mixture was partitioned between ethyl acetate and saturated sodium bicarbonate. The organic layer was dried and concentrated to an oil, which was purified by column chromatography, eluting with a gradient of ethyl acetate (10 to 100%) in isohexane, then eluting with methanol/DCM (10:90) to give (4-bromobenzyl)-(2-methoxyethyl)amine (13.0 g) as a yellow oil. MS (ES) 244 (M+H)+. 1H NMR (DMSO-D6) δ 2.05 (bs, 1H), 2.6 (t, 2H), 3.38 (t, 2H), 3.2 (s, 3H), 3.62 (s, 2H), 7.25 (d, 2H), 7.45 (d, 2H).

1. customThe mixture was partitioned between ethyl acetate and water
2. customthe organic layer was dried
3. customevaporated to an oil, which
4. customwas purified by column chromatography
5. washeluting with a gradient of ethyl acetate (60 to 100%) in isohexane

ORD-Eintrag

ord-1116e52e93994200b8320f029d10fcb3

Quelldatensatz

uspto-grants-2009_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07572826B2