Tungstophosphoric Acid–Catalyzed Imino-Diels–Alder Reaction: An Efficient One-Pot Synthesis of Pyrano- and Furanoquinoline Derivatives
作者:Biswanath Das、P. Balasubramanyam、Maddeboina Krishnaiah、Boyapati Veeranjaneyulu
DOI:10.1080/00397910902838946
日期:2009.10.12
Abstract Tungstophosphoric acid has been found to be an efficient catalyst for the synthesis of pyranos- and furanoquinolines through the Imino-Diels–Alder reaction involving one-pot coupling of benzaldehydes, anilines, and 3,4-dihydro-2 H-pyran or 2,3-dihydrofuran. The products are formed at room temperature in excellent yields in a short period of time.
摘要 磷酸钨酸是通过亚氨基-狄尔斯-阿尔德反应合成吡喃和呋喃喹啉的有效催化剂,该反应涉及苯甲醛、苯胺和 3,4-二氢-2 H-吡喃或 2 ,3-二氢呋喃。产品在室温下以极好的产率在短时间内形成。