Iranian Journal of Catalysis (IJC) Boric acid as a highly efficient and reusable catalyst for the one-pot synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions Volume 4 (2014) Issue 3, September 2014 2024 02 03 Boric acid as a highly efficient and reusable catalyst for the one-pot synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions EN Sobhan Rezayati Department of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, Iran. Chemistry Department, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran. Rahimeh Hajinasiri Chemistry Department, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran. Zahra Erfani Department of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, Iran. Saman Rezayati Department of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, Iran. Saeid Afshari-sharifabad Chemistry Department, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran. Journal Article 2024 02 03 An efficient and simple procedure for the synthesis of 1,8-dioxo-octahydroxanthenes from the aromatic aldehydes and 5,5-dimethylcyclohexane-1,3-dione (dimedone) in the presence of boric acid [BO3H3 or B(OH)3] as an inexpensive and reusable catalyst is described. The salient features of this methodology are: the elimination of corrosive liquid acids, high yields, simple methodology, short reaction times, easy work-up and green heterogeneous catalyst.