5-bromo-6-methyl-1,3-benzodioxole synthesis
- Product Name:5-bromo-6-methyl-1,3-benzodioxole
- CAS Number:5025-53-6
- Molecular formula:C8H7BrO2
- Molecular Weight:215.04
7145-99-5
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Yield:5025-53-6 99%
Reaction Conditions:
with pyridine;bromine in dichloromethane at 0 - 20; for 22.5 h;
Steps:
5.a
SYNTHESIS EXAMPLE 5; Synthesis of 3-[4,5-(methylenedioxy)-2-methylbenzoyl]-2-chloro-4-trifluoromethylpyridine (compound No. 13); (a); 3.2 ml (62 mmol) of bromine was dropwise added at 0° C. to a solution having 7.0 ml (58 mmol) of 3,4-(methylenedioxy)toluene and 5.5 ml (68 mmol) of pyridine dissolved in 110 ml of dichloromethane, followed by stirring for 30 minutes, and the temperature was raised to room temperature, followed by stirring for 22 hours. The mixture was washed with an aqueous sodium hydroxide solution, dried over anhydrous sodium sulfate and subjected to filtration, and the solvent was distilled off under reduced pressure. The crude product thus obtained was purified by silica gel column chromatography to obtain 13 g (yield 99%) of 2-bromo-4,5-(methylenedioxy)toluene.
References:
US2003/216444,2003,A1 Location in patent:Page/Page column 10
15930-53-7
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5434-47-9
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4720-68-7
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![2-[2-[(E)-2-[4-(dimethylamino)phenyl]ethenyl]-6-methylpyran-4-ylidene]propanedinitrile](/CAS/20180601/GIF/96042-30-7.gif)
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