[Cl:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=O)=[C:4]([CH3:11])[N:3]=1.[C:12]([NH:15][NH2:16])(=O)[CH3:13].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.ClC(Cl)(Cl)C#N>C(#N)C>[Cl:1][C:2]1[N:3]=[C:4]([CH3:11])[C:5]([C:6]2[O:8][C:12]([CH3:13])=[N:15][N:16]=2)=[CH:9][CH:10]=16-Chloro-2-methylnicotinic acid (200 mg, 1.2 mmol), acetohydrazide (95 mg, 1.3 mmol), solid supported triphenylphosphine on polystyrene (1.88 mmol/g loading, 1.94 g, 3.5 mmol) were placed in a microwave vial. Dry acetonitrile (16.7 ml) followed by trichloroacetonitrile (0.23 ml, 2.33 mmol) were added and the vial was heated in a microwave at 150° C. for 20 minutes. It was allowed to cool to room temperature, filtered, and the filter cake was washed with acetonitrile. The filtrate was concentrated under reduced pressure to afford the title compound.
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