p-Toluenesulfonic acid → HCID 13446049, compound

Participants

Reaction Steps

A solution of 17.6 g (0.1 mole) 2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione and a spatula tip of p-toluene sulfonic acid in 200 ml dichloromethane are mixed while stirring with 6 g (0.1 mole) isopropylamine and subsequently stirred to the end of the reaction at room temperature. After concentration of the solution a product is obtained by filtering off under suction and by recrystallizing from butylacetate. 13.5 g (62% of the theoretical yield) of 3-isopropylamino-1-benzoxepin-5(2H)-one are obtained.

Provenance & Evidence