Butylamine → HCID 19887353, compound

Participants

Reaction Steps

A mixture containing 8.2 g of 8-[4,4-bis(4-fluorophenyl)-3-butenyl]-4-methylene-2-oxo-1,3-dioxa-8-azaspiro[4,5]decane, 25 ml of xylene and 2.0 ml of butylamine is stirred at room temperature for 18 hours, then 0.8 g of p-toluenesulfonic acid monohydrate and 70 ml of xylene are added and the reaction mixture is boiled while azeotropically distilling off the water formed in the reaction. After termination of the reaction which is observed by thin layer chromatography (TLC), the mixture is cooled down and made alkaline to a pH of 9 to 10 by adding 5% by weight aqueous sodium hydroxide solution. After washing the organic phase with water to neutral and drying over anhydrous magnesium sulfate, the solvent is distilled off under reduced pressure. The crude product obtained as evaporation residue is recrystallized from ethanol under clarifying by activated carbon to give the title product in 72.5% yield, m.p.: 92°-93° C.

Provenance & Evidence