4-tert-Butylbenzoic acid → Methyl 4-[2-(4-tert-butylbenzamido)ethoxy]benzoate

Participants

Reaction Steps

p-tert-Butylbenzoic acid (5.35 g) and 3.34 g of triethylamine were dissolved in 70 ml of chloroform and 3.26 g of ethyl chloroformate was dropped into the above mixture with stirring and cooling at 0° to 5° C. After the dropping, the mixture was stirred at the same temperature for 30 minutes and, after addition of 5.86 g of methyl 4-(2-aminoethoxy)benzoate thereto, the mixture was stirred for 6 hours more. The reaction solution was washed with 10% hydrochloric acid, saturated potassium carbonate solution, and water, dried with anhydrous magnesium sulpahte, concentrated in vacuo, and the residue was crystallised with n-hexane to give 9.8 g of crystals which were further recrystallised from ethyl acetate to give 7.64 g (yield: 71.65%) of the product, m.p. 112°-114° C.

Provenance & Evidence