2,6-Diethylaniline → 8-Amino-N-(2,6-diethylphenyl)-1-methyl-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxamide

Participants

Reaction Steps

A suspension of potassium 8-amino-1-methyl-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxylic acid (180 mg, 0.73 mmol) in anhydrous dimethylformamide (5.0 mL) was treated with N-ethyl-N,N-diisopropylamine (0.258 mL, 1.47 mmol) and N-ethyl-N′,N′-diisopropyl carbodiimide hydrochloride (EDCI) (280 mg, 1.47 mmol) and 1-hydroxybenzotriazole (200 mg, 1.47 mmol). The mixture was then treated with 2,6-diethylaniline (0.170 mL, 1.1 mmol). The reaction was stirred at room temperature overnight. The reaction was diluted with water and the resulting precipitate was collected by filtration to afford the title compound (190 mg, 70% yield).

Provenance & Evidence