2,5-Dimethylbenzoic acid methyl ester synthesis
- Product Name:2,5-Dimethylbenzoic acid methyl ester
- CAS Number:13730-55-7
- Molecular formula:C10H12O2
- Molecular Weight:164.2
Yield:13730-55-7 97.6%
Reaction Conditions:
with potassium carbonate in N,N-dimethyl-formamide at 20;
Steps:
10.1
Step 1: Methyl-(2,5-dimethyl)benzoate Into a suspension of 75 g (499 mmol) 2,5-dimethylbenzoic acid, 103 g (748 mmol) potassium carbonate in 500 mL of DMF was added dropwise 77.9 g (549 mmol) of iodomethane with stirring at ambient temperature. After addition, the suspension was stirred for additional 5 hours. The reaction mixture was then poured into water and extracted with ethyl acetate. The organic layer was washed with water and brine and dried over anhydrous sodium sulfate. All solids were removed by filtration and the filtrate was concentrated to 80 g of colorless oil as product in 97.6% yield. 1H NMR (CDCl3) (300 MHz) δ 2.7 (s, 3H), 2.8 (s, 3H), 3.95 (s, 3H), 7.45 (s 1H), 7.51 (d, 3JHCCH=7.9 Hz, 1H), 7.42 (d, 3JHCCH=7.9 Hz, 1H)
References:
US2011/251395,2011,A1 Location in patent:Page/Page column 13
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