Tert-Butylamine → N-tert-Butyl-4-nitrobenzamide

Participants

Reaction Conditions

Reaction Steps

tert-Butyl amine (14.6 g, 0.200 mole) was stirred in ethyl acetate (150 mL, purified by washing with 5% sodium carbonate solution, saturated sodium chloride solution, drying over anhydrous magnesium sulfate, and filtering through fluted filter paper) and cooled to 5° C. with an ice bath. 4-nitrobenzoyl chloride (18.6 g, 0.100 mole) in purified ethyl acetate (75 mL) was added dropwise at such a rate to maintain the temperature below 10° C. The ice bath was removed upon complete addition of benzoyl chloride solution and the reaction stirred for 4 hours. The reaction mixture was then filtered on a Büchner funnel, the filtrate washed three times with 5 % HCl, once with saturated sodium chloride, dried over anhydrous magnesium sulfate, filtered through fluted filter paper, and the solvent stripped off leaving white crystalline product. The product was dried in a vacuum oven at 24 mm and 45° C. for 14 hours. This procedure produced 17.13 g of crystals of N-tert-butyl-4-nitrobenzamide (CPI1020) (77% yield), mp 162-163° C. Proton nuclear magnetic resonance (89.55 MHz in CDCl3) showed absorptions at 8.257 ppm (d, 8.8 Hz, 2 H; 3,5-aryl H); 7.878 ppm (d, 8.8 Hz, 2 H; 2,6-aryl H); 6.097 ppm (bs, 1 H; N-H); 1.500 ppm (s, 9 H; tert-butyl H).

Provenance & Evidence