CATALYST-FREE SYNTHESIS OF FURANO- AND PYRANOQUINOLINES BY USING GLYCEROL AS RECYCLABLE SOLVENT CATALYST-FREE SYNTHESE VON FURANO-UND PYRANOQUINOLINES DURCH DIE VERWENDUNG Glycerin als RECYCLABLE SOLVENT

We describe the use of glycerol as an efficient, safe and recyclable solvent in the one-pot imino Diels–Alder reaction of aldehydes, amines, and cyclic enol ethers to afford corresponding furano- and pyranoquinolines in excellent yields under mild conditions