Povarov Reaction of β-Enamino Esters and Isatin-3-imines for Diastereoselective Synthesis of Spiro[indoline-3,2′-quinolines]
摘要:
The p-toluenesulfonic acid catalyzed Povarov reaction of isatin-3-imines with beta-enamino esters, which were generated in situ from the reaction of arylamines and methyl propiolate in ethanol, afforded the polysubstituted spiro[indoline-3,2'-quinolines] in high yields and with high diastereoselectivity.
Synthesis of 1′-aryl-2′-(2-oxoindolin-3-yl)spiro[indoline-3,5′-pyrroline]-2,3′-dione via one-pot reaction of arylamines, acetone, and isatins
作者:Yan Sun、Jing Sun、Chao-Guo Yan
DOI:10.1016/j.tetlet.2012.05.023
日期:2012.7
An efficient synthetic method for 1′-aryl-2′-(2-oxoindolin-3-yl)spiro[indoline-3,5′-pyrroline]-2,3′-diones was successfully developed via the one-pot domino reaction of arylamines, acetone, and isatins in acetic acid. The reaction mechanism involved the sequential Michael addition and ring closure of the in situ formed 3-N-aryliminoisatin and isatylidene acetone.
“On water” synthesis of spiro-indoles via Schiff bases
作者:Siva S. Panda、Subhash C. Jain
DOI:10.1007/s00706-011-0697-x
日期:2012.8
AbstractA fast, efficient, and clean “on water” synthesis of new Schiffbases and their conversion to spiro compounds undermicrowaveirradiation, as well as in water, is reported. Indol-2,3-diones were reacted separately with various heterocyclic and aromatic amines in water at room temperature to obtain corresponding Schiffbases in high purity and yield. These were then converted into corresponding