A kind of synthetic method of Erecoxib
A synthesis method and compound technology, applied in the field of erecoxib synthesis, can solve the problems of low yield, high bromine and bromine toxicity, and great harm to the environment and human body, and achieve simple reaction steps, easy industrial production, and environmental reduction. and the effects of harm to the human body
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Embodiment 1
[0030] Take 50g of p-methylphenylacetyl chloride and 19.3g of n-propylamine into a 500ml three-necked flask, add 200ml of toluene, heat and reflux for 4 hours, cool down to room temperature, wash twice with 100ml of drinking water, and distill the toluene under reduced pressure to obtain an oily substance 54g, yield 95%.
[0031] Add 200ml of methanol to the oil, stir to dissolve the oil, add 32g of sodium methoxide, continue to stir and dissolve, add 66.8g of methylsulfonylphenyl chloroethanone, heat and reflux for 6 hours, evaporate the solvent under reduced pressure, add drinking water 300ml was beaten for 1 hour, filtered, and the filter cake was washed with 30ml of drinking water, and dried to obtain 90.8g of white solid, with a yield of 87%.
Embodiment 2
[0033] Take 50g of p-methylphenylacetyl chloride and 19.3g of n-propylamine and put them into a 500ml three-necked flask, add 200ml of dichloromethane, heat and reflux for 6 hours, cool down to room temperature, wash twice with 100ml of drinking water, and distill off the dichloromethane under reduced pressure , to obtain 53 g of oily matter, yield 93%.
[0034] Add 200ml of methanol to the oil, stir to dissolve the oil, add 30g of sodium methoxide, continue to stir and dissolve, add 78.1g of methylsulfonylphenylbromoethanone, heat and reflux for 6 hours, evaporate the solvent under reduced pressure, add drinking water 300ml was beaten for 1 hour, filtered, and the filter cake was washed with 30ml of drinking water, and dried to obtain 92.1g of white solid, with a yield of 90%.
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