Trifluoroacetic acid → 6-amino-9-(3-aminophenyl)-7-(4-phenoxyphenyl)-7H-purin-8(9H)-one

Participants

Reaction Steps

To a solution of tert-butyl 3-(6-amino-8-oxo-7-(4-phenoxyphenyl)-7H-purin-9(8H)-yl)phenylcarbamate (6) (404 mg, 0.8 mmol) in 8 mL DCM was added 2 mL TFA dropwise. The reaction mixture was stirred at rt for 1 hr, then concentrated to dryness. The residue was purified by column chromatography (silica gel, 0 to 5% methanol in DCM (0.3% Et3N)) to give 6-amino-9-(3-aminophenyl)-7-(4-phenoxyphenyl)-7H-purin-8(9H)-one (7) (325 mg, 100%) as a yellow solid. LC-MS (ESI): m/z (M+1) 411.

Provenance & Evidence