Acetyl chloride → 1-(2-aminoethyl)-2-propyl-2H-pyrazolo[3,4-c]quinolin-4-amine dihydrochloride

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Reaction Steps

Acetyl chloride (7.1 mL, 100 mmol) was added to ethanol (100 mL) at 0° C. The resulting solution was added to the tert-butyl 2-(4-amino-2-propyl-2H-pyrazolo[3,4-c]quinolin-1-yl)ethylcarbamate from Part G. The solution was heated at reflux for 9.5 hours. Upon cooling to ambient temperature, a precipitate formed that was isolated after two days by filtration, washed with a small amount of cold ethanol, and dried to yield 5.78 g of 1-(2-aminoethyl)-2-propyl-2H-pyrazolo[3,4-c]quinolin-4-amine dihydrochloride as a white solid.

Provenance & Evidence