[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:12]3[N:13]=[C:14]([NH:17][CH:18]4[CH2:23][CH2:22][C:21](=[CH:24][C:25]#[N:26])[CH2:20][CH2:19]4)[CH:15]=[CH:16][C:11]3=[N:10][CH:9]=2)[CH:5]=[CH:6][CH:7]=1>CCOC(C)=O.[Pd]>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:12]3[N:13]=[C:14]([NH:17][C@H:18]4[CH2:19][CH2:20][C@H:21]([CH2:24][C:25]#[N:26])[CH2:22][CH2:23]4)[CH:15]=[CH:16][C:11]3=[N:10][CH:9]=2)[CH:5]=[CH:6][CH:7]=1A mixture of 2-(4-((3-(3-chlorophenyl)imidazo[1,2-b]pyridazin-6-yl)amino)cyclohexylidene)acetonitrile (100 mg, 0.26 mmol) and 10% Pd/C (100 mg) in EtOAc (2 mL) was stirred under H2 balloon at room temperature for 4 h. LCMS showed the most of s.m was consumed. The mixture was filtered and the filterate was concentrated in vacuo. The residue was purified by prep. HPLC to give EX. 8-87 (13 mg, 13.7%) as a white solid.
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