Benzyl Bromide → (S)-2-(Dibenzylamino)butan-1-ol

To a stirred solution of (S)-(+)-2-aminobutan-1-ol (5 g, 56.18 mmol) in dry acetonitrile (100 ml) was added dry powdered potassium carbonate (31 g, 224.72 mmol) followed by benzyl bromide (19 g, 111.11 mmol). The reaction was stirred at room temperature for 24 h. The solvent was removed under vacuo and the residue was taken up in ethyl acetate (100 ml) and water (100 ml). The organic phase was washed again with water, dried (Na2SO4) and concentrated to provide the pure product as slightly yellow oil (14.5 g, 97.3%). δH (250 MHz, CDCl3) 0.98 (3 H, t, J 7.5, CHCH2CH3), 1.38-1.2 (1 H, m, CHCHHCH3), 1.94-1.78 (1 H, m, CHHCH3), 2.83-2.71 (1 H, m, CHCHHCH3), 3.22 (1 H, s, b, OH), 3.65-3.4 (2 H, m, CH2OH), 3.47 (2 H, d, J 17.5, 2×CHHPh), 3.94 (2 H, d, J 17.5, 2×CHHPh), 7.46-7.26 (10 H, m, 2×C6H5); δC (250 MHz, CDCl3) 139.42 (2×C), 129.1 (2×CH), 128.52 (2×CH), 127.25 (2×CH), 61.97 (CH), 60.67 (CH2), 53.23 (CH2), 17.92 (CH2), 11.83 (CH3); m/z 270.2 (M+H)

1. customThe solvent was removed under vacuo
2. washThe organic phase was washed again with water
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated

ORD record

ord-07207c79ddf54ea5a4553419bb883f45

Source dataset

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09173938B2