Nitin M. Thorat a , Santosh R. Kote b and Shankar R. Thopate b * ... Received November 21, 2013: Revised April 10, 2014: Accepted May 06, 2014 Abstract: An efficient and eco-friendly synthesis of flavones, promoted by naturally occurring acids, via cyclodehydra- tion of 1-(2-hydroxyphenyl)-3-aryl-1,3-propanediones using conventional and microwave heating under solvent-free con- dition is described. ... Keywords: Flavones, naturally occurring acids, ...