反应详情

Thionyl chloride (160 ml) was added to 40 g of N-(2-hydroxyethyl)-4-hydroxybenzamide with evolution of gas. The reaction mixture was ultrasonicated for 1.75 hours, then cooled and diluted with ether. The resulting solid product was collected by filtration, washed with ether and dried overnight in a vacuum oven at 40° C. to give 42.5 g of 4,5-dihydro-2-(4-hydroxyphenyl)oxazole in the form of its hydrochloride salt, m.p. 162°-163° C.

1. customThe reaction mixture was ultrasonicated for 1.75 hours
2. temperaturecooled
3. filtrationThe resulting solid product was collected by filtration
4. washwashed with ether
5. customdried overnight in a vacuum oven at 40° C.