FIELD: chemistry.
SUBSTANCE: present invention relates to a method of producing 2,4-dialkylbenzaldehyde, which attracts attention due to use as a fragrance and as a starting material for fragrances. Method includes a step of allowing carbon monoxide to react with a starting material containing m-dialkylbenzene of formula (1), in the presence of hydrogen fluoride and boron trifluoride for formylation at least to position (a). Starting material is dialkylbenzene containing more than 90 mol. % m-dialkylbenzene of formula (1). Number of moles of boron trifluoride relative to 1 mole of m-dialkylbenzene of formula (1) is 0.7 moles or more and 3.0 moles or less. 
, where R1 is a methyl group and R2 is an isopropyl or neopentyl group.
EFFECT: obtaining a method of obtaining, which enables to achieve high conversion rate and output of the product, as well as very regioselective formylation.
4 cl, 1 tbl, 9 ex
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