OICC Press Iranian Journal of Catalysis 2345-4865 3 2 2024 02 03 1,3-Dibromo-5,5-dimethylhydantoin (DBH) as a cheap and efficient catalyst for the synthesis of polyhydroquinolines and 12-aryl-8,9,10,12-tetrahydro [a] xanthene-11-ones EN Farhad Shirini Department of Chemistry, College of Science, University of Guilan, Rasht, Iran 0000-0002-7204-5000 Gholam Hossein Imanzadeh Department of Chemistry, College of Science, University of Mohaghegh Ardabili, Ardabil, Iran. Masoumeh Abedini Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran. Parisa Ghods Ghasemabadi Department of Chemistry, College of Science, University of Mohaghegh Ardabili, Ardabil, Iran. Journal Article 2024 02 03 1,3-Dibromo-5,5-dimethylhydantoin (DBH), as a cheap and commercially available reagent, is efficiently able to catalyze the synthesis of polyhydroquinoline derivatives and 12-aryl-8,9,10,12-tetrahydro[a] xanthene-11-ones via one-pot multi-component reactions. This novel synthetic method has the advantages of low cost and availability of the catalyst, short reaction times, high to excellent yields, simple and easy work-up and purification of the products compared to the conventional methods reported in the literature.