1: 2,3-dimethyl-phenol With magnesium methanolate T=20°C; 0.0166667 h; 2: formaldehyd T=20°C; 0.166667 h; 3: With sulfuric acid T=20°C; 0.166667 h; regioselective reaction;

1.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 3 h / 0 - 20 °C / |Inert atmosphere 2.1: n-butyllithium / hexane; diethyl ether / 3 h / 0 - 20 °C / |Inert atmosphere 2.2: 0.17 h / 0 °C / |Inert atmosphere 2.3: |Inert atmosphere 3.1: montmorillonite K-10 / benzene / 24 h / |Reflux View Scheme