Potassium Carbonate → 3-[2-(Pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-1H-pyrrolo[2,3-b]pyridine
Reaction equation
C(=O)([O-])[O-].[K+].[K+].C1(S([N:16]2[C:20]3=[N:21][CH:22]=[CH:23][CH:24]=[C:19]3[C:18]([C:25]3[C:29]([C:30]4[CH:35]=[CH:34][CH:33]=[CH:32][N:31]=4)=[N:28][N:27]4[CH2:36][CH2:37][CH2:38][C:26]=34)=[CH:17]2)(=O)=O)C=CC=CC=1>CO.O>[N:31]1[CH:32]=[CH:33][CH:34]=[CH:35][C:30]=1[C:29]1[C:25]([C:18]2[C:19]3[C:20](=[N:21][CH:22]=[CH:23][CH:24]=3)[NH:16][CH:17]=2)=[C:26]2[CH2:38][CH2:37][CH2:36][N:27]2[N:28]=1Participants
4
Procedure
Add potassium carbonate (21 mg, 0.15 mmol) to a solution of 1-benzenesulfonyl-3-[2-(pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-1H-pyrrolo[2,3-b]pyridine (Example 3, Part A; 34 mg, 0.77 mmol) in methanol/water (0.9 mL/0.3 mL). Reflux the reaction overnight (16 h). Concentrate in vacuo, add aqueous sodium chloride (10 mL), and extract with chloroform (3×25 mL). Dry the combined organic extracts with sodium sulfate, filter, and concentrate in vacuo. Purify by flash column chromatography, using the appropriate mixture of methylene chloride, chloroform, methanol, and concentrated aqueous ammonium hydroxide, to provide 16 mg (68%) of the title compound as an off-white solid. MS (ES) m/z=302 (M+H).