PROCESS OF PRODUCING ALKYL ETHERS OF 4-BIPHENYLCARBONIC ACID Russian patent published in 2017 - IPC C07C69/78 C07C67/00 B01J31/20 B01J31/22 B01J31/28 B01J23/745 

FIELD: chemistry.

SUBSTANCE: invention relates to the method of producing alkyl ethers of 4-biphenylcarboxylic acid where R = Me, Et, Prⁿ, which are used as starting compounds for the preparation of medicaments and thermotropic polymers. The essence of the method consists in the interaction of biphenyl with carbon tetrachloride and alcohols (MeOH, EtOH, PrⁿOH) in the presence of a catalyst selected from the series Fe(acac)₃, Fe(OAc)₂, Fe(OAc)₂*4H₂O, FeCl₂ and Fe₂(CO)₉, at 130-150°C for 4-10 hours at a molar ratio of [Fe]: [biphenyl]:[CCl₄]:[ROH]=5-20:100:100-2000:100-2000. The following ratios of the catalyst and the reagents [Fe]:[biphenyl]:[CCl₄]:[RON]=10:100:1000:1000, at a temperature of 130°C for 8 hours at a temperature of 130°C and a reaction time of 8 hours, the yield of methyl 4-biphenylcarboxylic acid is 41%, ethyl 4-biphenylcarboxylic acid - 14%, propyl ether - 90%.

EFFECT: method improvement.

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