反应详情

A mixture of 3-formyl-5-methylbenzoic acid (75.0 g, 0.457 moles), thionyl chloride (65 g, 0.0547 moles), and dimethylformamide (1 ml), in toluene (500 ml) was slowly warmed to 70° C. and stirred at that temperature for 2 h. The toluene was eliminated in a rotavap to yield 3-formyl-5-methylbenzoic chloride used in the next step as such.