OICC Press Iranian Journal of Catalysis 2345-4865 2 3 2024 02 03 Triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} as an efficient and homogeneous catalyst for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones EN Abdolkarim Zare Department of Chemistry, Payame Noor University, PO Box 19395-3697, Tehran, Iran 0000-0002-8210-3155 Roghayyeh Khanivar Department of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, Iran Maria Merajoddin Department of Chemistry, Payame Noor University, Iran. Masoud Kazem-Rostami Young Researchers Club, Takestan Branch, Islamic Azad University, Takestan, Iran. Mohammad Mahdi Ahmad-Zadeh Department of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, Iran Ahmad Reza Moosavi-Zare Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad, 6541861841, Iran. Alireza Hasaninejad Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran Journal Article 2024 02 03 Brønsted acidic ionic liquid triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} efficiently catalyzes the one-pot multi-component condensation of 2-naphthol with arylaldehydes and dimedone (5,5-dimethylcyclohexane-1,3-dione) under solvent-free conditions to afford 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in high yields and relatively short reaction times.