The title aldehyde 1 reacts smoothly with the enamine moiety of 2-aminochromone 2 to produce hitherto unreported 3-(2-hydroxybenzoyl)-5H-1-benzopyrano[2,3-b]pyridin-5-one (azaxanthone) 5. This reaction has been extended for the synthesis of bisazaxanthone 9.
标题醛1分发生反应顺利与烯胺部分2 -aminochromone 2以产生迄今未报告的3-(2-羟基苯甲酰基)-5- ħ -1-苯并
吡喃并[2,3- b ]
吡啶-5-酮(azaxanthone)5。该反应已扩展为合成双氮杂
蒽酮9。