1.1: sodium hydroxide / tetrabutylammomium bromide / toluene; water / 6 h / Reflux 1.2: 20 °C 2.1: sodium hydroxide; tetrabutylammomium bromide / dichloromethane; water / 16 h / 20 °C 2.2: 2 - 51 °C View Scheme

1.1: thionyl chloride / N,N-dimethyl-formamide / toluene / 5 h / 65 - 70 °C 2.1: iron(III) sulfate pentahydrate; iron / toluene / 99 - 114 °C 2.2: 62 - 66 °C / Inert atmosphere 3.1: sodium hydroxide / tetrabutylammomium bromide / toluene; water / 6 h / Reflux 3.2: 20 °C 4.1: sodium hydroxide; tetrabutylammomium bromide / dichloromethane; water / 16 h / 20 °C 4.2: 2 - 51 °C View Scheme

1.1: hydrogen bromide / dichloromethane; water; propan-1-ol / 0.13 h / 45 - 70 °C / pH 1.5 2.1: sodium hydroxide / dichloromethane; water / 0.25 h / 17 °C 2.2: 45 - 50 °C / pH 1.5 View Scheme

sodium hydroxide in dichloromethane; water T=18°C; 0.166667 h;