Trifluoroacetic acid → n-[6-[1,6-Dihydro-1-methyl-4-(methylamino)imidazo[4,5-d]pyrrolo[2,3-b]pyridin-7-yl]-2-pyridinyl]-acetamide
Reaction equation
C(O[C:6](=O)[N:7]([C:9]1[N:14]=[C:13]2[NH:15][C:16]([C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([NH:24][C:25](=[O:27])[CH3:26])[N:19]=3)=[CH:17][C:12]2=[C:11]2[N:28]([CH3:31])[CH:29]=[N:30][C:10]=12)C)(C)(C)C.FC(F)(F)C(O)=O>C(Cl)Cl>[CH3:31][N:28]1[C:11]2=[C:12]3[CH:17]=[C:16]([C:18]4[N:19]=[C:20]([NH:24][C:25](=[O:27])[CH3:26])[CH:21]=[CH:22][CH:23]=4)[NH:15][C:13]3=[N:14][C:9]([NH:7][CH3:6])=[C:10]2[N:30]=[CH:29]1Participants
Procedure
A436.2 (55 mg, 0.13 mmol), was dissolved in DMA (5 mL) and the solution heated to 70° C. One equivalent of 1.0M potassium t-butoxide in THF (0.14 ml, 0.14 mmol) was quickly added and the reaction heated at 70° C. for thirty minutes. A second equivalent of 1.0M potassium t-butoxide in THF (0.14 ml, 0.14 mmol) was quickly added and the reaction mixture stirred an additional thirty minutes. The reaction mixture was concentrated in vacuo. The crude product residue was chromatographed on Silica Gel (230-400 Mesh) eluting with 2-5% MeOH/CH2Cl2 to give the Boc-protected intermediate, tert-butyl-7-(6-acetamidopyridin-2-yl)-1-methyl-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-4-yl(methyl)carbamate as an off-white solid. (26 mg, 60% yield). The solid was dissolved in methylene chloride (0.5 mL) and trifluoroacetic acid (0.5 mL) was added and the reaction mixture stirred for 0.25 h. The solvent was evaporated under reduced pressure to provide A436 (20 mg, 60%). M+H+=336.34 1H NMR (400 MHz) MEOD δ 9.20 (s, 1H), 8.02 (m, 1H), 7.78 (m, 1H), 7.71 (d, 1H), 7.56 (s, 1H), 4.33 (s, 3H), 3.45 (s, 3H), 2.19 (s, 3H).
Workup
- customThe solvent was evaporated under reduced pressure
- customto provide A436 (20 mg, 60%)
Sources & evidence
- ORD record
- ord-c27a4768e6e9450ab1ff655919e0b491
- Source dataset
- uspto-grants-2010_06
- Patent number
- US07737279B2
Reaction notes
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