4-Nitrobenzoic Acid → HCID 178508619, compound

Participants

Reaction Steps

A solution of cis 3-[4-amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]-1-cyclobutanol (0.113 g, 0.000302 mol), 4-nitrobenzoic acid (0.101 g, 0.000605 mol) and triphenylphosphine (0.159 g, 0.000605 mol) in tetrahydrofuran (5 mL) was cooled to 0° C. Diethyl azodicarboxylate (0.096 mL, 0.159 g, 6.000605 mol) was added dropwise, keeping the temperature below 10° C. The mixture was allowed to come to room temperature over eighteen hours. The solvent was removed in vacuo and the residue was purified by flash column chromatography on silica using heptane/ethyl acetate (3:1). The solvent was removed in vacuo to give trans 3-[4-amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]cyclobutyl 4-nitrobenzoate (0.081 g, 0.000164 mmol) as a tan solid.

Provenance & Evidence