Triethylamine → HCID 14853164, compound

Participants

Reaction Conditions

Reaction Steps

A 100 ml eggplant-shaped flask was charged with 1.4 g (7.25 millimoles) of 2-amino-2-(4-t-butylphenyl)-1-ethanol and 0.73 g (7.25 millimoles) of triethylamine and 30 ml of tetrahydrofuran, and a solution of 1.4 g (7.25 millimoles) of 2-chloro-6-fluorobenzoyl chloride in 10 ml of tetrahydrofuran was added over 30 minutes to the flask with ice cooling and stirring. The mixture was stirred further for 3 hours at room temperature. The resulting triethylamine hydrochloride was removed by a glass filter, and the filtrate was concentrated under reduced pressure. The concentrate, thionylchloride (2.6 g; 21.8 and 50 ml of benzene were put in a 200 ml egg-plant-shaped flask, and refluxed for 5 hours. The reaction mixture was concentrated under reduced pressure. Fifty milliliters of methanol was added to the remaining oil, and the mixture was heated to 60° C. To the mixture was added dropwise 5 ml of a 15 % aqueous solution of sodium hydroxide. After the addition, the mixture was stirred at the same temperature for 1 hour, transferred into water, and extracted with ethyl acetate. The extract was purified by silica gel column chromatography (mobile phase: hexane/ethyl acetate=8/2) to give 2-(2-chloro-6-fluorophenyl)-4-(4-t-butylphenyl)-2-oxazoline (compound No. 45) as a colorless oil. Yield 1.8 g (74.9 %).

Provenance & Evidence