Efficient One-Pot Synthesis of Some New Xanthene Derivatives Based on the Reaction of Dimedone with α,α′-Bis(substituted-benzylidene) Cycloalkanones Using Catalytic Amount of _pTSA

Abstract

GRAPHICAL ABSTRACT

Keywords:

• α,α′-Bis(substituted-benzylidene)cycloalkanones
• dimedone
• Michael addition
• p-toluenesulfonic acid
• xanthenes

Notes

^a Reaction conditions: α,α′-bis(substituted-benzylidene) cycloalkanones 1 (2 mmol), dimedone 2 (2.4 mmol), pTSA (0.3 mmol, 15 mol %), toluene (15 mL), reflux.

^b Isolated yields.