Pyridiniumtribromide → 3-Bromo-2,5-difluoro-4-hydroxybenzaldehyde

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 2,5-difluoro-4-hydroxybenzaldehyde (37.5 g, 0.237 mmol) in dichloromethane (1.5 L) was added pyridinium tribromide (75.9 g, 0.237 mmol). The reaction mixture was stirred at 40° C. for 7 hrs then at room temperature overnight. The reaction was washed with water and brine, dried over magnesium sulfate, filtered and evaporated to give 48.4 g of crude 3-bromo-2,5-difluoro-4-hydroxybenzaldehyde use as this in the next step.

Herkunft & Nachweise