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26 mg of sodium hydride dispersion (60% strength, 0.65 mmol) are suspended under argon in 5 ml of abs. N,N-dimethylformamide and cooled to 0° C. Then 193 mg (0.5 mmol) of 4,4″-di-pyrrolidin-1-yl-1′H-[2,2′;6′,2″]terpyridin-4′-one (L18 from Example 24) are added. The yellow suspension is stirred for 30 minutes 0° C. and then heated at room temperature for 15 minutes. The mixture is cooled again and a solution of 40 μl (0.65 mmol) of methyl iodide is added. The mixture is stirred for a further 45 minutes and the precipitate that forms is filtered off and recrystallised from methanol. 4′-Methoxy-4,4″-di-pyrrolidin-1-yl-[2,2′;6′,2″]-terpyridine is obtained in the form of a white solid. 168.1 (quart.); 157.9 (quart.); 156.6 (quart.); 152.9 (quart.); 149.5 (tert.); 107.4 (tert.); 107.1 (tert.); 105.0 (tert.); 55.9 (prim.); 47.3 (sec.); 25.8 (sec.). MS (EI, 70 eV), m/z: 401 (50, [M+]); 373 (80); 372 (100); 332 (20); 28 (40).

1. temperatureheated at room temperature for 15 minutes
2. temperatureThe mixture is cooled again
3. stirringThe mixture is stirred for a further 45 minutes
4. filtrationthe precipitate that forms is filtered off
5. customrecrystallised from methanol