Hydrogen Bromide → 5-Bromo-3-phenylpentan-1-ol

HRID 555592Notes

Reaction equation

[C:1]1([CH:7]([CH2:11][CH2:12][OH:13])[CH2:8][CH2:9]O)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[BrH:14]>C1(C)C=CC=CC=1>[Br:14][CH2:9][CH2:8][CH:7]([C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)[CH2:11][CH2:12][OH:13]

Participants

Conditions

Temperature: 180 °C

Procedure

3-Phenylpentane-1,5-diol (452 mg, 2.51 mmol) was dissolved in 48% aqueous hydrobromic acid (284 μL, 2.51 mmol) and toluene (2.5 mL), placed in a sealed tube, and heated in a microwave oven at 180° C. for 10 minutes. The mixture was cooled and purified by column chromatography on silica gel, eluting with 0-100% ethyl acetate/hexanes to give the title compound as a colorless oil. 1H NMR (500 MHz, CDCl3) δ 1.57 (br s, 1H), 1.81-1.97 (m, 2H), 2.08-2.23 (m, 2H), 2.97 (quintet, J=5.0 Hz, 1H), 3.06-3.14 (m, 1H), 3.24-3.31 (m, 1H), 3.42-3.49 (m, 1H), 3.49-3.56 (m, 1H), 7.17-7.25 (m, 3H), 7.28-7.33 (m, 2H).

Workup

temperatureThe mixture was cooled
custompurified by column chromatography on silica gel
washeluting with 0-100% ethyl acetate/hexanes

Sources & evidence

ORD record: ord-f5680584667246d78c1354189d15ef8e
Source dataset: uspto-grants-2011_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08053455B2

Reaction notes

Loading…