反应详情

20.6 g of the methyl α-(2-methylphenyl)-β-methoxyacrylate obtained by Method A, 17.65 g of N-bromosuccinimide, 0.2 g of azodiisobutyronitrile and 150 ml of CCl4 are slowly heated to 90° C. This temperature is maintained until all the succinimide is floating on the solvent. Filtration is followed by concentrating, the remaining oil is dissolved in about 5 ml of acetone, and n-hexane is added to bring about crystallization. This gives 27.5 g of colorless crystals of mp 86°-87° C.

1. filtrationFiltration
2. concentrationby concentrating
3. dissolutionthe remaining oil is dissolved in about 5 ml of acetone
4. additionn-hexane is added
5. customcrystallization