Hydrochloric Acid → 2-(2H-benzo[d][1,2,3]triazol-2-yl)-6-(hydroxymethyl)-4-methoxyphenol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

In a 500 ml round bottom flask equipped with a magnetic stirrer, regular addition funnel, powder addition funnel, and nitrogen inlet was added 23.6 g (77.7 mmol) 2-(hydroxymethyl)-4-methoxy-6-((2-nitrophenyl)diazenyl)phenol and 200 ml ethanol. NaOH (18.8 g, 470 mmol) was dissolved in 100 ml deionized water and approximately one-fourth was added dropwise to the reaction mixture. The mixture was heated to 80° C. and 25.1 g (232 mmol) formamidine sulfinic acid and the remaining sodium hydroxide solution were concurrently added dropwise to the reaction mixture over 30 minutes. The mixture was stirred at 80° C. for 3 hours, poured into 3.5 L water, and then acidified to pH 4 using 1 N HCl. The resultant solid was collected by filtration and worked up as in Example 5 to give a light yellow solid (4.3 g, 20.5%).

Herkunft & Nachweise