布朗斯台德酸性离子液体催化4-羟基-1-甲基-2-喹诺酮与查尔酮的串联反应:吡喃并[3,2 - c ]喹啉-2-酮的区域选择性合成†
摘要:
已开发出一种新的方法,用于通过催化量的任务特定离子与查尔酮串联环合4-羟基-1-甲基-2-喹诺酮来合成吡喃并[3,2 - c ]喹啉-2-酮衍生物。无溶剂条件下的液体[1-甲基-3-(4-磺丁基)咪唑-4-甲基苯磺酸盐]。所开发的方案适用于由具有芳基和杂芳基取代基的容易获得的查耳酮构建吡喃并[3,2 - c ]喹啉-2-酮。该反应可能通过迈克尔加成反应然后环化进行。还证明了催化剂再循环的可行性。该方法仅产生水作为副产物,代表绿色的合成方案。
Graphene oxide nanosheets: a highly efficient and reusable carbocatalyst catalyzes the Michael-cyclization reactions of 4-hydroxycoumarins, 4-hydroxypyrone and 4-hydroxy-1-methylquinolinone with chalcone derivatives in aqueous media
作者:Nazia Kausar、Partha Pratim Ghosh、Gargi Pal、Asish R. Das
DOI:10.1039/c5ra08776g
日期:——
efficient, reusable and cost-effective carbocatalyst for the facilesynthesis of highly diversified 4H-pyransvia a one-pot, two-component condensation reaction between freshly prepared chalcones and 4-hydroxycoumarin in aqueous media offering excellent yields. The new, green and metal free synthetic method also enables the condensation reaction for the formation of a library of pyranoquinolines and