Ethanol → HCID 14810737, compound

Participants

Reaction Steps

To a solution of ethyl-3-(7-chlorobenzothiazol-2-ylmethyl)-4-oxo-3-H-phthalazin-1-ylacetate (800 mg) in a 2:1 mixture of ethanol and tetrahydrofuran (30 ml) was added 5 ml of 1% aqueous potassium hydroxide solution and the mixture was stirred at room temperature for 2 hours. The reaction mixture was concentrated by evaporation under vacuum and the resulting residue was diluted with water (10 ml). Upon adjusting the pH of the solution to around 2 with sufficient 10% HCl,a white precipitate was obtained. The precipitate was collected by filtration, air-dried and then crystallized from methylene chloride (10 ml) to obtain the title compound (yield, 273 mg), m.p. 168° C.

Provenance & Evidence