Diisopropylethylamine → Tert-butyl({[mesityl(methyl)amino]acetyl}amino)(imino)methylcarbamate

Participants

Reaction Steps

[Mesityl(methyl)amino]acetic acid (6.67 g; 32 mmol), diisopropylethylamine (20.68 g; 160 mmol), tert-butyl amino(imino)methylcarbamate (6.11 g; 38 mmol), and 1-hydroxybenzotriazole monohydrate (5.88 g; 38 mmol) were dissolved in N,N-dimethylformamide (150 mL), 2-(1H)-benzotriazol-1-yl-1,1,3,3-tetramethyluronium hexafluorophosphate (14.56 g; 38 mmol) was added thereto, and the mixture was stirred for 65 hours at room temperature. To the reaction solution, ethyl acetate (400 mL) was added, and the mixture was washed with 10% aqueous citric acid solution, brine, and saturated aqueous sodium bicarbonate solution. The organic layer was dried over anhydrous magnesium sulfate and then distilled under reduced pressure. The resulting crystals were dispersed in diethyl ether, collected by filtration and dried to give 5.82 g of the title compound (yield 52%).

Provenance & Evidence