ChemicalBook CAS DataBase List 2,4-Dimethoxy-5-bromobenzoic acid methyl ester

2,4-Dimethoxy-5-bromobenzoic acid methyl ester synthesis

8synthesis methods

Product Name:2,4-Dimethoxy-5-bromobenzoic acid methyl ester
CAS Number:39503-51-0
Molecular formula:C10H11BrO4
Molecular Weight:275.1

67-56-1 Synthesis

67-56-1
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32246-20-1
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2,4-Dimethoxy-5-bromobenzoic acid methyl ester

39503-51-0
54 suppliers
$16.00/1g

Yield:39503-51-0 90%

Reaction Conditions:

with sulfuric acid at 70; for 5 h;

Steps:

1.2

Step 2 Synthesis of methyl 5-bromo-2,4-dimethoxybenzoate 5-Bromo-2,4-dimethoxybenzoic acid (10.0 g) and con. sulfuric acid (2.4 g) were added to methanol (80 mL). After reaction at 70°C for 5 hr, completion of the reaction was confirmed by HPLC. The reaction mixture was cooled and adjusted to pH 7 with 2 mol/L aqueous sodium hydroxide solution, and ethyl acetate (50 mL) was added. The organic solvent was evaporated from the mixture under reduced pressure. To the concentrated residue was added ethyl acetate (50 mL), and the mixture was concentrated again under reduced pressure. To the concentrated residue was added ethyl acetate (70 mL), and the mixture was stirred and partitioned. The obtained organic layer was washed successively with water (50 mL), 5% sodium hydrogencarbonate (50 mL) and water (50 mL). After washing, ethyl acetate was evaporated under reduced pressure to give methyl 5-bromo-2,4-dimethoxybenzoate (9.4 g) (90%).

References:

EP1992607,2008,A1 Location in patent:Page/Page column 79-80

32246-20-1
83 suppliers
$49.70/1g

75-36-5 Synthesis