METHOD FOR PRODUCING ALKYL ETHERS OF METOXYBENZOIC ACIDS Russian patent published in 2017 - IPC C07C69/92 C07C67/313 B01J31/20 B01J31/22 B01J23/745 

FIELD: chemistry.

SUBSTANCE: essence of the method consists in the interaction of anisole with carbon tetrachloride and alcohols (MeOH, EtOH, PrⁿOH, BuⁿOH) in the presence of a catalyst selected from the series FeBr₃, FeCl₃*6H₂O, Fe₂CO₉, FeCl₃(harmless), FeCl₂, FeBr₂, Fe(acac)₃, FeCl₂*4H₂O, Fe(OAc)₂, Fe(OAc)₂*4H₂O at 130°C for 4-8 hours at a molar ratio of [Fe]:[anisole]:[CCl₄]:[ROH]=1-10:100:100-1000:100-1000. The following ratios of catalyst and reagents are optimal for the reaction: [Fe]:[anisole]:[CCl₄]:[ROH]=10:100:1000:1000 at a temperature of 130°C for 6 hours. At a temperature of 130°C and the reaction time of 6 hours, the yield of methyl ethers of ortho- and para-methoxybenzic acid is 15% and 46%, ethyl - 32% and 68%, propyl - 23% and 78%, and butyl - 12% and 82%.

EFFECT: increasing the yield.

1 tbl, 27 ex