GREEN SYNTHESIS OF POLYSUBSTITUTED QUINOLINES AND XANTHENE DERIVATIVES PROMOTED BY TARTARIC ACID AS A NATURALLY GREEN CATALYST UNDER SOLVENT-FREE CONDITIONS
Graphical Abstract: This method reported the use of tartaric acid as a green and highly efficient catalyst for the convenient synthesis of polysubstituted quinolines and xanthenes derivatives in excellent yields under solvent-free conditions. The main advantages of this one-pot procedure are the green and economic availability of the catalyst, simple experimental and work-up procedures.