Convenient syntheses of cyclic carbazole oligomers by 1-pot Knoevenagel reaction

摘要

Syntheses of cyclic carbazole oligomers by a 1-pot Knoevenagel reaction without using high dilution methods are described. Cyclic carbazole oligomers of several ring sizes could be obtained in high yields when 3, 6-diformyl-9-docosylcarbazole and appropriate aromatic compounds having a bis(cyanoacetate) group were reacted in THF using DMAP as a base at 40 deg C.