反应详情

58 g (0.25 mole) of 2,3,4,6-tetrachlorophenol, 100 ml of absolute xylene, 47.5 g (0.25 mole) of p-chloromethylbenzoyl chloride and 0.25 ml of absolute pyridine were refluxed as described above for 4 hours. A part of the ester that formed crystallized upon the cooling of the reaction solution. The concentrated mother liquor yielded much additional crystallizate. In all, 93.15 g (97%) was isolated, with a melting point of 110° to 114° C. The raw ester was recrystallized from cyclohexane (1:15) and then melted at 143°-149° C. Another recrystallization raised the melting point to 150°-152° C.

1. customas described above for 4 hours