反应详情

Chloroacetyl chloride (3.6 g) was added dropwise to a solution of 5-cyano-2,3-dihydro-3,3-dimethyl-2-hydroxybenzofuran (5 g) prepared as in Example 10, and triethylamine (3.2 g) in diethyl ether (50 ml) with stirring and cooling. After 3 hours at room temperature, the mixture was shaken with water and an insoluble solid product was filtered off and dried to give 2.4 g of title compound, mp 138° C.

1. temperaturecooling
2. filtrationan insoluble solid product was filtered off
3. customdried