Efficient One-Pot Synthesis of Spirooxindole Derivatives Catalyzed by <scp>l</scp>-Proline in Aqueous Medium
作者:Yuling Li、Hui Chen、Chunling Shi、Daqing Shi、Shunjun Ji
DOI:10.1021/cc9001185
日期:2010.3.8
An efficient one-potsynthesis of spirooxindole derivatives by three-component reaction of isatins, malononitrile (cyanoacetic ester) and 1,3-dicarbonyl compounds in water in the presence of l-proline is reported. This new protocol has the advantages of environmental friendliness, higher yields, shorter reaction times, low cost, and convenient operation.
Ultrasound-assisted the three-component synthesis of spiro[4H-pyrano[3,2-c]quinolin-4,3′-indoline]-2′,5(6H)-diones in water
作者:Shaghyegh Gholizadeh、Koorosh Radmoghadam
DOI:10.13005/ojc/290450
日期:2013.12.30
A simple and efficient synthesis of the titled spirooxindoles was accomplished via the three-component reaction between isatins, 4-hydroxy-2H-quinolin-2-one, and malononitrile or ethylcyanoacetate in aqueous medium under ultrasound irradiation.
El-Taweel; Elagamey; Elmougy, Sh.M., Egyptian Journal of Chemistry, 2011, vol. 54, # 6, p. 703 - 721
作者:El-Taweel、Elagamey、Elmougy, Sh.M.
DOI:——
日期:——
Ambient synthesis of spiro[4H-pyran-oxindole] derivatives under [BMIm]BF4 catalysis
作者:Kurosh Rad-Moghadam、Leila Youseftabar-Miri
DOI:10.1016/j.tet.2011.05.077
日期:2011.8
A simple and efficient one-pot approach for assembling some fused spiro[4H-pyran-oxindole] heterocycles by means of three-component reactions between isatins, malononitrile or ethyl cyano-acetate, and 1,3-dicarbonyl compounds is reported. The combinatorial syntheses were achieved for the first time without applying extra activation energy at ambient temperature while making use of [BMIm]BF4 as an ionic liquid catalyst. Good functional group tolerance and broad scope of usable substrates are other prominent features of the present methodology. (C) 2011 Elsevier Ltd. All rights reserved.