Trifluoroacetic acid → 6-amino-9-(3-(methylamino)phenyl)-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)phenyl(methyl)carbamate (31) (450 mg, 0.86 mmol) in DCM (8 mL) was added TFA (2 mL) dropwise. The reaction mixture was stirred at rt for 1 h and then concentrated. The residue was purified by column chromatography (silica gel, 0 to 10% methanol in methylene chloride (0.3% Et3N)) to give 6-amino-9-(3-(methylamino)phenyl)-7-(4-phenoxyphenyl)-7H-purin-8(9H)-one (32) (364 mg, 100%). LC-MS (ESI): m/z (M+1) 425.

Provenance & Evidence