[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([OH:10])=[CH:6][CH:5]=1)([O-:3])=[O:2].[H-].[Na+].Cl[C:14]1[CH:19]=[C:18]([S:20][CH3:21])[N:17]=[CH:16][N:15]=1>CN(C=O)C.C(OCC)(=O)C.O>[CH3:21][S:20][C:18]1[CH:19]=[C:14]([O:10][C:7]2[CH:8]=[CH:9][C:4]([N+:1]([O-:3])=[O:2])=[CH:5][CH:6]=2)[N:15]=[CH:16][N:17]=1To a solution of 4-nitrophenol (8.04 g, 58 mmol) in DMF (36 ml) is added at 0° C. sodium hydride (2.5 g, 63 mmol, 60% in mineral oil) and stirring is continued for 30 minutes at r.t. A solution of 4-chloro-6-methylsulfanyl-pyrimidine (8.44 g, 52.5 mmol) in DMF (12 ml) is added and the reaction mixture is sealed in a reaction tube and heated in the microwave to 130° C. for 20 minutes. The reaction mixture is taken up in ethyl acetate and water. The organic phase is washed dried and evaporated. Recrystallization from ethyl acetate results in 6.08 g (44%) of an off-white powder of sufficient purity.
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