Various 3-pyrrolylindolin-2-ones and pyrrolylindeno[1,2-b]quinoxaline were synthesized for the first time in high yields in water under neutral conditions by supramolecular catalysis involving β-cyclodextrin. The β-cyclodextrin can be recovered and reused a number of times without any loss of activity.
在中性条件下,通过β-环糊精的超分子催化,高产率首次合成了各种3-吡咯基吲哚-2-酮和吡咯烷基[1,2- b ]喹喔啉。β-环糊精可被回收并重复使用多次而不会损失任何活性。
Dy(OTf)3 as a versatile catalyst for the synthesis of 3-pyrrolyl-indolinones and pyrrolyl-indeno[1,2-b]quinoxalines
Dysprosium(III) triflate is found to catalyze efficiently the coupling of 4-hydroxyproline with indeno[1,2-b]quinoxalin-11-one and isatin derivatives under mild conditions to produce 11-(1H-pyrrol-1-yl)-11H-indeno[1,2-b]quinoxalin-11-one and 3-(1H-pyrrol-1-yl)indolin-2-one derivatives, respectively, in excellent yields in short reaction times. A comparative study with both InCl3 and Dy(OTf)(3) is described. (c) 2007 Published by Elsevier Ltd.
A green approach for efficient synthesis of N-substituted pyrroles in ionic liquid under microwave irradiation
作者:H.M. Meshram、B.R.V. Prasad、D. Aravind Kumar
DOI:10.1016/j.tetlet.2010.03.036
日期:2010.7
A rapid synthesis of N-substituted pyrroles has been described by the reaction of 4-hydroxyproline with isatins in ionic liquid under microwave irradiation. The recovered ionic liquid was reused for six cycles. The reaction proceeds without addition of any acid promoter (C) 2010 Elsevier Ltd. All rights reserved.