4-(4-ALKYLCYCLOHEXYL)BENZALDEHYDE Russian patent published in 2012 - IPC C07C47/546 C07C45/49 C07C13/19 C07C5/22 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing 4-(4-alkylcyclohexyl)benzaldehyde or 4-(cyclohexyl)benzaldehyde, which can be used in chemical products used in materials for electronic equipment, including liquid crystals, and for pharmaceutical and agrochemical application. The invention also relates to versions of a method of producing 4-(trans-4-alkylcyclohexyl)benzaldehyde and a method of producing (trans-4-alkylcyclohexyl)benzene. The method of producing 4-(4-alkylcyclohexyl)benzaldehyde or 4-(cyclohexyl)benzaldehyde involves formylation of a benzene derivative of formula (1a) with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride where R¹ denotes an alkyl group containing 1-10 carbon atoms or a hydrogen atom. The hydrogen fluoride is used in amount of not less than 3 moles but not more than 20 moles, and boron trifluoride is used in amount of not less than 1.1 moles but not more than 5 moles per mole of the benzene derivative of formula (1a), and formylation is carried out at temperature from -50°C to 30°C.

EFFECT: invention enables selective synthesis of desired products with high purity.

10 cl, 15 ex