OICC Press Iranian Journal of Catalysis 2345-4865 6 2 2024 02 03 Ammonium chloride catalyzed microwave-assisted synthesis of tetrahydrobenzo[b]pyrans EN Vijay Pagore Department of Chemistry, Deogiri College, Station Road, Aurangabad (MS) India 431 005. Sunil U. Tekale Department of Chemistry, Shri Muktanand College, Gangapur (MS) India 431 109. Vivekanand B. Jadhav Department of Chemistry, Shri Muktanand College, Gangapur (MS) India 431 109. Rajendra P. Pawar Department of Chemistry, Deogiri College, Station Road, Aurangabad (MS) India 431 005. Journal Article 2024 02 03 In the present work, we have developed a mild, efficient, and environmentally benign method for the synthesis of tetrahydrobenzo[b]pyran derivatives via a three-component cyclocondensation of aldehydes, malononitrile and dimedone utilizing ammonium chloride as a simple, easily available and cost effective catalyst under microwave irradiation. This method has several attracting features such as simple experimental set up, easy work-up procedure, high conversions and short reaction times affording the products in moderate to excellent yield.