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ChemicalBook CAS DataBase List TERT-BUTYL 4-BROMO-2-METHYLBENZOATE

TERT-BUTYL 4-BROMO-2-METHYLBENZOATE synthesis

5synthesis methods
24424-99-5 Synthesis
Di-tert-butyl dicarbonate

24424-99-5
810 suppliers
$13.50/25G

68837-59-2 Synthesis
4-Bromo-2-methylbenzoic acid

68837-59-2
329 suppliers
$5.00/1g

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Yield:445003-37-2 98%

Reaction Conditions:

with dmap in tert-butyl alcohol at 20; for 18 h;

Steps:

78.1; 88.1 Tert-butyl 4-bromo-2-methylbenzoate.

Tert-butyl 4-bromo-2-methylbenzoate. A solution of 4-dimethylamiopryidine (0.012 mol, 1.5 g) in 20 mL of tert-butanol was added to solution of 4-bromo-2-methylbenzoic acid (5 g, 0.023 mol) and di-tert-butyl dicarbonate (10.13 g, 0.046 mol) in 30 mL of tert- butanol. The mixture was stirred at room temperature for 18 hours. The mixture was concentrated and subjected to column chromatography (silica gel, petroleum ether/ethyl acetate = 20: 1) to give tert-butyl 4-bromo-2-methylbenzoate (6 g, 98%).

References:

WO2013/75083,2013,A1 Location in patent:Paragraph 00521; 00522; 00579; 00580

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