[Cl:1][C:2]1[CH:7]=[C:6](I)[CH:5]=[CH:4][N:3]=1.[C:9]1([CH3:24])[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1C1C=CC(B(O)O)=CC=1.C(=O)([O-])[O-].[Na+].[Na+].COCCOC>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.O>[Cl:1][C:2]1[CH:7]=[C:6]([C:12]2[CH:13]=[CH:14][C:9]([CH3:24])=[CH:10][CH:11]=2)[CH:5]=[CH:4][N:3]=1A mixture of 2-chloro-4-iodopyridine (10.0 g, 41.8 mmol), p-tolylphenylboronic acid (5.68 g, 41.8 mmol), Pd(Ph3P)4 (1.45 g 1.25 mmol), sodium carbonate (13.3 g, 125 mmol), DME (300 mL) and water (75 mL) was degassed with nitrogen and then refluxed overnight. The reaction mixture was concentrated and extracted with ethyl acetate. The ethyl acetate layer was dried on Na2SO4 and vacuum distilled and recrystallized to give 2-chloro-4-(p-tolyl)pyridine (3.75 g, 18.4 mmol, 44% yield).
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