Triethylamine → N-allyl-N-(1,3-dioxolan-2-ylmethyl)-2-[2-nitro-5-(2-chloro-4-trifluoromethylphenoxy)phenoxy]propionamide

Participants

Reaction Conditions

Reaction Steps

N-Allyl-N-(1,3-dioxolan-2-ylmethyl)amine (1.32 grams; 0.0092 mole), dry toluene (70 ml) and triethylamine (3.0 ml) were charged into a glass reaction vessel equipped with a magnetic stirrer, thermometer, gas inlet tube and addition funnel. The mixture was blanketed with nitrogen gas, cooled to 10° C. and a solution of 2-[2-nitro-5-(2-chloro-4-trifluoromethylphenoxy)phenoxy]propionyl chloride (3.8 grams; 0.0092 mole) in toluene (40 ml) was added dropwise with stirring. After the addition was completed the mixture was allowed to warm to room temperature and stirring was continued for a period of about 1.5 hours. After this time the reaction mixture was transferred to a separatory funnel and was washed with water and with aqueous sodium bicarbonate. The washed solution was dried by passing it through phase separation paper. The dried solution was then chromatographed through a clay column using mixtures of ethyl acetate and hexane as the eluant. Nine fractions were collected. Fraction five was stripped of solvents and thereafter further dried by letting the residue stand under vacuum at 110° C. for a period of four hours to yield the desired product N-allyl-N-(1,3-dioxolan-2-ylmethyl)-2-[2-nitro-5-(2-chloro-4-trifluoromethylphenoxy)phenoxy]propionamide as an amber gum.

Provenance & Evidence