2-Nitropropane → Methyl 3-formyl-4-methylsulfonyl-2-methylbenzoate

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Reaction Steps

Into 20 ml of methanol was added 2.60 g of a methanol solution of 28% sodium methylate, and 1.30 g of 2-nitropropane was added dropwise at room temperature, followed by adding 4.40 g of methyl 3-bromomethyl-4-methylsulfonyl-2-methylbenzoate. The resulting solution was heated at reflux for an hour. After the reaction solution was cooled down, 50 ml of IN hydrochloric acid was added to the solution to extract with ethyl acetate. The organic layer was washed with a saturated sodium chloride solution and dried over anhydrous magnesium sulfate. The solvent was distilled out under reduced pressure to give 3.10 g of the title compound as crystals. m.p. 108~110° C.

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