Carbon tetrabromide → {[(8-Bromooctyl)oxy]methyl}benzene

Participants

Reaction Conditions

Reaction Steps

Compound 2 (133 g, 0.5635 mol) was dissolved in 1.5 L of DCM, CBr4 (280.35 g, 0.8456 mol) was added into this stirring solution and reaction mixture was cooled to 0° C. under inert atmosphere. PPh3 (251.03 g, 0.957 μmol) was then added in portions keeping the temperature below 20° C. and after complete addition reaction was stirred for 3 h at room temperature and monitored by TLC. After completion of reaction, solid (PPh3O) precipitated out from the reaction mixture was filtered off and filtrate was diluted with crushed ice (˜1.5 kg) and extracted with DCM (3×750 mL). Organic layer was separated, dried over an Na2SO4 and distilled under vacuum. Resulting crude compound was chromatographed on 60-120 mesh silica gel column using 0-5% ethyl acetate in hexanes as eluting system to give compound (150 g, 89%) as pale yellow liquid. H1 NMR (400 MHz, CDCl3): δ=7.33-7.25 (m, 5H), 4.49 (s, 2H), 3.47-3.41 (m, 2H), 3.41-3.37 (m, 2H), 1.86-1.80 (m, 4H), 1.62-1.56 (m, 2H), 1.42-1.29 (m, 8H).

Provenance & Evidence