[Cl:1][C:2]1[N:3]=[N:4][C:5](Cl)=[CH:6][C:7]=1[CH3:8].[C:10]1(B(O)O)[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O>[Cl:1][C:2]1[N:3]=[N:4][C:5]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)=[CH:6][C:7]=1[CH3:8]3,6-Dichloro-4-methylpyridazine (1.00 g, 6.1 mmol) was mostly dissolved in dioxane (22.5 mL) then added phenylboronic acid (0.82 g, 6.7 mmol), PdCl2(dppf)-CH2Cl2Adduct (0.25 g, 0.31 mmol) and a solution of cesium carbonate (6.0 g, 18 mmol) in water (7.5 mL). The reaction mixture was heated at 80° C. for 6 hours. The reaction mixture was concentrated under vacuum and the remaining solid was triturated with water. The solid was collected on a glass frit, washing well with water. The sample was purified by flash chromatography eluting with 1:4 ethyl acetate/hexane to afford 3-chloro-4-methyl-6-phenylpyridazine as an off-white solid.
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