ABSTRACT
An eco-friendly synthesis of pyrano[3,2-c]chromen-5(4H)-one derivatives was conducted by the condensation of 4-hydroxycoumarins, aromatic aldehydes, and acetophenones. Clean profile, excellent yield, ambient temperature, and use of visible light intensity instead of catalyst are the attractive features of this method.
GRAPHICAL ABSTRACT
![](/cms/asset/a63aef9c-9237-4d20-acc9-6017f8955493/lsyc_a_1426101_uf0001_oc.jpg)