One-pot synthesis of 9-arylxanthenediones and 9-pyrazoloxanthenediones using [DBU]OAc

详细

The synthesis of 9-aryl-1H-xanthene-1,8(2H)-dione derivatives starting from benzaldehydes or synthesized pyrazolcarbaldehydes and dimedone in the presence of 2,3,4,5,7,8,9,10-octahydropyrido[1,2-a]-[1,3]diazepin-1-ium acetate in high yields is reported. The synthesis provides several advantages, including short reaction time, simple work-up, and environmental friendliness.