1: With bis-triphenylphosphine-palladium(II) chloride in N,N-dimethyl-formamide T=70°C; Stille Coupling; 3 h; 2: With potassium fluoride in methanol; N,N-dimethyl-formamide T=20°C; 4 h;

1: furan With n-butyllithium in diethyl ether T=-40°C; 0.5 h; 2: 2-pyrimidinyl chloride in diethyl ether T=-40°C; 1 h; 3: With 2,3-dicyano-5,6-dichloro-p-benzoquinone in tetrahydrofuran T=20°C; 0.416667 h; Further stages.;

1: furan With n-butyllithium in tetrahydrofuran T=-15°C; 1 h; Inert atmosphere; 2: With zinc(II) chloride−TMEDA in tetrahydrofuran T=-15 - 20°C; 3: 2,4-Dichloro-pyrimidine regioselective reactionFurther stages;