METHOD OF PRODUCING 2,4-DIALKYLBENZALDEHYDE Russian patent published in 2024 - IPC C07C45/49 C07C47/542 

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