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ChemicalBook CAS DataBase List 2-BROMO-5-HYDROXYBENZALDEHYDE
2973-80-0

2-BROMO-5-HYDROXYBENZALDEHYDE synthesis

10synthesis methods
-

Yield:2973-80-0 90.9%

Reaction Conditions:

with boron tribromide in dichloromethane at 0 - 25; for 3 h;

Steps:

343B.1

To a mixture of 2-bromo-5-methoxybenzaldehyde (2000.0 mg, 9.3 mmol) indichioromethane (10 mL) was added boron tribromide (2M in DCM; 4.65 mL, 9.3 mmol) slowly at 0 °C. The reaction was warmed up to 25 °C and stirred for 3 h. The reaction was quenched with water (10 mL) at 0°C and extracted with EtOAc (50 mL). The organic layer was washed with water (50 mL x 2) and brine (50 mL), dried over Mg504 and concentrated. The residue was purified by flash column chromatography (petroleum ether) to afford 2-bromo-5-hydroxybenzaldehyde (1.7 g, 90.9% yield) as a colorless oil.

References:

WO2017/84630,2017,A1 Location in patent:Paragraph 00976

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