Water → [2-(2-Thienyl)ethylamino](2-chlorophenyl)acetamide

Participants

Reaction Steps

24.8 g (0.075 mol) of [2-(2-thienyl)ethylamino](2-chlorophenyl)acetamide hydrochloride, prepared according to example 5. or 6., is mixed with 170 ml of water, then under mild cooling 30 ml of 10% sodium hydroxide solution and 170 ml of 1,2-dichloroethane are added. The phases are separated, the aqueous phase is extracted with 2×20 ml of 1,2-dichloroethane, the combined organic layer is evaporated in vacuo. Residue: 22 g, fast crystallizing oil. The crude product is recrystallized from 80 ml of isopropyl acetate to give 19,5 g of the crystalline base of formula (VII). Yield: 88,2%, mp.: 90-92° C.

Provenance & Evidence