Synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] and spiro[indoline-3,4′-pyrano[2,3-c]chromene] derivatives using silica-bonded ionic liquids as a recyclable catalyst in aqueous medium
作者:Khodabakhsh Niknam、Abolhassan Piran、Zahra Karimi
DOI:10.1007/s13738-015-0801-y
日期:2016.5
recyclable catalyst for the synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazoles] via one-pot condensation reaction of isatin, activated methylene reagents, and 3-methyl-l-phenyl-5-pyrazolone in refluxing aqueous medium in good to high yields. Also, these silica-bonded ionic liquids were used as catalysts for the synthesis of spiro[indoline-3,4′-pyrano[2,3-c]chromene derivatives in refluxing aqueous medium
摘要硅胶键合的离子液体用作可循环使用的催化剂,用于通过一锅的靛红,活化的亚甲基试剂和3-的缩合反应合成螺[吲哚啉-3,4'-吡喃并[2,3-c]吡唑]甲基-1-苯基-5-吡唑啉酮在回流的水性介质中的收率很高。而且,这些二氧化硅键合的离子液体也用作催化剂,用于在回流的水性介质中以高收率合成螺[吲哚啉-3,4'-吡喃并[2,3-c]苯甲基]衍生物。催化剂可以重复使用几次而无需任何其他处理。 图形概要二氧化硅键合的离子液体被用作可再循环的催化剂,用于合成螺[吲哚啉-3,4'-吡喃并[2,3-c]吡唑]和螺[吲哚啉-3,4'-吡喃并[2,3-] c]色烯,分别通过靛红,活化的亚甲基试剂和3-甲基-1-苯基-5-吡唑啉酮或4-羟基香豆素在回流的水性介质中一锅缩合反应,收率很高。