TY - JOUR ID - 38319 TI - Microwave Assisted Synthesis of some New Chromene Derivatives JO - Rafidain Journal of Science JA - RJS LA - en SN - 1608-9391 AU - K. Younis, Shaymaa AD - Y1 - 2010 PY - 2010 VL - 21 IS - 2 SP - 44 EP - 52 KW - chromene derivatives KW - Microwave irradiation KW - Diels KW - Alder reaction DO - 10.33899/rjs.2010.38319 N2 - An efficient synthesis of some new 4-(benzo [d] -1,3-dioxo-5-yl)-[2,3-c]-N-aryl pyrolo-1,3-dione-3,4,5,6-tetrahydro-2H-benzo[h] chromene derivatives (4a-h) via Diels-Alder reaction of 2-piperonylidene-1- tetralone (1) and N- aryl maleimides (3a-h) under microwave irradiation was described. The yield have been improved (- 84 92%) and the reaction time reduced from hours to few minutes through the use of dichloromethane as solvent and aluminum chloride as catalyst. All prepared compounds were confirmed by the available physical and spectral methods. UR - https://rsci.mosuljournals.com/article_38319.html L1 - https://rsci.mosuljournals.com/article_38319_767d6f7daf21f338628a830d963a9d0e.pdf ER -