Abstract
In this paper, Na2Ca(HPO4)2 was used for the first time as a heterogeneous catalyst for efficient and green synthesis of 1,8-dioxo-octahydroxanthenes and biscoumarin derivatives. Under optimal conditions, the products were obtained with excellent yields in a short reaction time. This developed procedure has shown several advantages: avoiding toxic solvents, catalyst, simple handling, mild conditions, easy recovery, and catalyst reuse.
Na2Ca(HPO4)2 as a heterogeneous catalyst guarantees an environmentally friendly process; it can be considered an alternative to the other previously reported synthesis methods.
Disclosure statement
No potential conflict of interest was reported by the author(s).