[C-:1]#[N:2].[K+].[I-].C[N+](C)(C)[CH2:7][C:8]1[C:16]2[C:11](=[N:12][CH:13]=[CH:14][N:15]=2)[NH:10][C:9]=1[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>O.CN(C)C=O>[C:17]1([C:9]2[NH:10][C:11]3=[N:12][CH:13]=[CH:14][N:15]=[C:16]3[C:8]=2[CH2:7][C:1]#[N:2])[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1A solution of potassium cyanide (0.84 g) in water (20 mL) was added rapidly to a stirred solution of trimethyl(6-phenyl-5H-pyrrolo[2,3-b]pyrazin-7-ylmethyl)-ammonium iodide [1.1 g, Reference Example 33] in dimethylformamide (20 mL) and the mixture heated at 75° C. for 6 hours. The cooled solution was diluted with water (100 mL) and the precipitated solid filtered to give the title compound as a yellow solid, m.p. 247–248° C.
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