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1-(Bromomethyl)-2-chloro-3,4-dimethoxybenzene synthesis

2synthesis methods
-

Yield:848696-72-0 94%

Reaction Conditions:

with phosphorus tribromide in diethyl ether at 20; for 2 h;

Steps:

209.a

PBr3 (0.13 g, 0.5 tnmol) was added dropwise to a solution of [2-chloro-3,4- bis(methyloxy)phenyl]methanol (0.404 g, 2 mmol) in Et2O (10 mL) and the reaction was stirred at RT for 2 h. NaHCO3 was added and the reaction was extracted with Et2O. The organic layer was dried over MgSO4 and concentrated to yield the crude product (0.5 g, 94%). 1H-NMR (CDCl3) δ : 3.903 (d, 6H, J= 2.8 Hz), 4.619 (s, 2H), 6.831 (d, IH, J= 8.4 Hz ), 7.189 (d, IH, J= 8.8 Hz).

References:

WO2007/65093,2007,A2 Location in patent:Page/Page column 122