1,5-双(2'-吡啶基)戊烷-1,3,5-三酮 、
1,5-bis(4-ethoxypyrid-2-yl)pentane-1,3,5-trione 在
silica gel 作用下,
以Pure 4,4″-diethoxy-1′H-[2,2′;6′,2″]terpyridin-4′-one can be obtained by chromatography on silica gel (chloroform/methanol 9:1, 0.1% NH4OH) in the form of a white crystalline powder的产率得到4,4''-diethoxy-1'H-[2,2';6',2'']terpyridin-4'-one