Pyridinium chloride → 4'-(5-fluoro-2,3-dihydroindole-1-carbonyl)-4-(2-oxo-2,3-dihydroimidazo[4,5-b]pyridin-1-yl)-3,4,5,6-tetrahydro-2H,1'H-[1,2']bipyridinyl-6'-one

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Reaction Steps

A well stirred mixture of 20 mg (0.041 mmol) 1-[4′-(5-fluoro-2,3-dihydroindole-1-carbonyl)-6′-methoxy-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4-yl]-1,3-dihydroimidazo[4,5-b]pyridin-2-one and 100 mg (0.865 mmol) pyridine hydrochloride was kept in a melt for 7 min using a hot air blower. After the reaction mixture had cooled it was dissolved in DMF and purified by preparative HPLC. The fractions containing the product were combined and lyophilised.

Provenance & Evidence