[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[C:17]2[C:16]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[N:15][CH:14]=[N:13][C:12]=2[N:11](COCC[Si](C)(C)C)[CH:10]=1.C(O)(C(F)(F)F)=O.[OH-].[Na+].C(N)CN>C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[C:17]2[C:16]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[N:15][CH:14]=[N:13][C:12]=2[NH:11][CH:10]=1To a solution of 5-(2-methoxyphenyl)-4-phenyl-7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo[2,3-d]pyrimidine (60 mg, 0.13 mmol) in DCM (1.0 mL) was added TFA (0.964 mL, 12.5 mmol) and the reaction mixture stirred at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure and the residue was redissolved in MeOH (1.0 mL). 10 M aqueous NaOH (0.088 mL, 0.88 mmol) and ethylenediamine (17 μL, 0.25 mmol) were then added and the reaction was stirred for 30 minutes at room temperature. The reaction mixture was then acidified with TFA and purified by reverse phase HPLC using an acetonitrile gradient in water with 0.1% TFA modifier. The combined fractions with the desired product were concentrated until only the water layer remained. The water layer was neutralized with 2 M aqueous potassium bicarbonate and the mixture was extracted with ethyl acetate (×5). The combined organic fractions were dried with sodium sulfate, filtered and concentrated under reduced pressure to give 5-(2-methoxyphenyl)-4-phenyl-7H-pyrrolo[2,3-d]pyrimidine. LRMS (ESI) calc'd for C19H16N3O [M+H]+: 302, found 302. 1H NMR (600 MHz, DMSO-D6) δ 12.34 (s, 1H); 8.83 (s, 1H); 7.57 (d, 1H, J=2.3 Hz); 7.31 (m, 3H); 7.22 (m, 2H); 7.07 (t, 2H, J=7.6 Hz); 6.93 (t, 1H, J=7.6 Hz); 6.52 (d, 1H, J=8.2 Hz); 3.33 (s, 3H).
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