An InCl3 catalyzed facile one-pot synthesis of novel dispiro[cyclopent-3′-ene]bisoxindoles
摘要:
An InCl3 catalyzed efficient synthesis of novel dispiro[cyclopent-3'-ene]bisoxindoles is accomplished via a one-pot reductive cyclization of isatylidene malononitriles using the Hantzsch ester. (C) 2008 Elsevier Ltd. All rights reserved.
One-pot four component condensation for the synthesis of novel dispirooxindole pyrrolidine linked 1,2,3-triazoles<i>via</i>stereo- and regioselective [3 + 2] cycloaddition reaction in PEG-400
作者:Sudesh Kumari、Jitender M. Khurana
DOI:10.1002/hc.21351
日期:2016.11
been reported for the synthesis of novel dispirooxindole pyrrolidine linked 1,2,3-triazole conjugates using Cu(I) as a catalyst in PEG-400 by stereoselective [3 + 2] azide-alkyne cycloaddition followed by [3 + 2] azomethine ylide and alkene cycloaddition. Structures have been confirmed by spectral and X-ray studies. Crystal packing of 5a has also been reported. Rapid reaction, easy work-up and high
Three-Component Condensation for the Construction of Novel Spirooxindoles
作者:Chun Cai、Fei Ji、Mu Sun、Mei-fang Lv、Wen-bin Yi
DOI:10.1055/s-0032-1316836
日期:——
using a copper azide–alkynecycloaddition (CuAAC) reaction. A new route for the synthesis of novel spirooxindoles from isocyanides, dialkyl acetylenedicarboxylates, and N-substituted isatylidene derivatives through [3+2] cycloaddition has been developed. This method has several advantages, such as high regioselectivity, high yields, readily available starting materials, and one-pot operations. The
Transient zwitterions generated from dimethyl allenedicarboxylate and isoquinoline were successfully intercepted with 2-oxo-1H-indol-3-ylidenes to result in a facile multicomponent reaction under mild conditions.
A novel method for the synthesis of functionalized spirocyclic oxindoles by one-pot tandem reaction of vinyl malononitriles with isatylidene malononitriles
作者:Thelagathoti Hari Babu、A. Abragam Joseph、D. Muralidharan、Paramasivan T. Perumal
DOI:10.1016/j.tetlet.2009.12.082
日期:2010.2
One-pot synthesis of novel spirocyclicoxindoles was achieved via vinylogous Michael addition of vinyl malononitriles on isatin–malononitrile adducts as the keystep followed by a sequential tandem reaction.
Abstract Herein, an efficient and sustainable one-pot, four-component access to rhodanine-oxindole derivatives is achieved by a reaction between primary amines, carbon disulfide, ethyl chloroacetate, and cyano-substituted alkenyl oxindoles. The reaction was conducted without any harsh conditions as well as exhausting workup in polyethylene glycol (PEG) as a green solvent at room temperature and delivered