Water → HCID 70578092, compound

Participants

Reaction Steps

A mixture of xanthene-9-spiro-4'-piperidine hydrochloride (1 g.), potassium carbonate (1.2 g.) and γ-chloro-p-fluorobutyrophenone ethylene ketal (1.03 g.) in n-butanol is heated under reflux for 48 hours. The mixture is poured into water, extracted with ether, the ether solution evaporated and the residue warmed with 3N hydrochloric acid for 1 hour to hydrolyse the ketal. The acidic solution is extracted with ethyl acetate, the solvent evaporated and the residue recrystallised from ethyl acetate to give 1'-[3-(p-fluorobenzoyl)propyl]xanthene-9-spiro-4'-piperidine hydrochloride (0.51 g.), m.p. 219°-222° C.

Provenance & Evidence