METHOD OF SYNTHESIS OF 2-METHYL-1-NAPHTHOL AND 2,4-DIMETHYL-1-NAPHTHOL MIXTURE Russian patent published in 1995 - IPC

FIELD: organic chemistry. SUBSTANCE: method involves catalytic steam-phase methylation of 1-naphthol with methanol at 250-380 C at the mole ratio 1-naphthol: methanol = 1:(5-10), at the volume raw feeding 100-1000 K₃. Catalyst has oxides of iron (III), vanadium (V) and manganese (II) at the following ratio, wt.-%: 100-1000 h^-1 43-50; Fe₂O₃ 42-51, and MnO - the rest. Mixture of 2-methyl-1-naphthol and 2,4-dimethyl-1-naphthol is obtained. Synthesized compounds were used as the initial products for vitamin V₂O₅ synthesis. EFFECT: improved method of synthesis. 1 tbl