Pyridoflavanone類の合成研究(第1報) : 3-Aryl-2,3-dihydro-1-oxo-1H-pyrano[3,2-f]quinolineの合成

抄録

6-Acetylquinoline (II) underwent rearrangement to 5-acetyl-6-quinolinol (III) with aluminium chloride in nitrobenzene. It was concluded that (III) had the given structure from the nuclear magnetic resonance spectral analysis of the compound (V) derived from (III) and separate synthesis of V starting with 5-amino-6-quinolinol. The compound III was condensed with some aromatic aldehydes (IX a-h) to give the corresponding chalcones (Xa-c) or the corresponding flavanones (XId-h). XIa-c were produced on heating Xa-c in 50% acetic acid.