Acetic Acid → 3-Isopropylpyrazolo[1,5-a]pyrimidin-2-amine

Participants

Reaction Steps

Acetic acid (0.038 mL, 0.67 mmol) was added to a solution of 3-dimethylaminoacrylaldehyde (624 mg, 4.43 mmol) and the product from Example 112B (414 mg, 2.95 mmol) in ethanol (9 mL), and the reaction mixture was heated at 80° C. for 4 hours, then concentrated under vacuum to a dark oil. The residue was purified by flash chromatography (silica gel eluted with hexanes-EtOAc 50:50-0:100) to provide the title compound as a yellow solid. MS (ESI) m/z 177 (M+H)+.

Provenance & Evidence