Efficient One-Pot Synthesis of Novel Spirooxindole Derivatives via Three-Component Reaction in Aqueous Medium
作者:Hui Chen、Daqing Shi
DOI:10.1021/cc100056p
日期:2010.7.12
A novel and efficientone-potsynthesis of spiro[indoline-3,4'-pyrazolo[3,4-b]quinoline]dione, spiro[furo[3,4-e]pyrazolo[3,4-b]pyridine-4,3'-indoline]dione, and spiro[indeno[2,1-e]pyrazolo[3,4-b]pyridine-4,3'-indoline]dione derivatives via three-component reaction of isatin, 5-amino-3-methylpyrazole, and 1,3-dicarbonyl compounds in aqueous medium is described. The advantages of this method include
New four-component reactions in water: a convergent approach to the metal-free synthesis of spiro[indoline/acenaphthylene-3,4′-pyrazolo[3,4-b]pyridine derivatives
作者:Kamaraj Balamurugan、Subbu Perumal、J. Carlos Menéndez
DOI:10.1016/j.tet.2011.03.020
日期:2011.5
New four-component domino reactions are described that allow the one-pot synthesis of spiro[indoline/acenaphthylene-3,4'-pyrazolo[3,4-b]pyridine derivatives from the reaction of phenylhydrazine, 3-aminocrotononitrile, isatin/acenaphthylene-1,2-dione, and cyclic 1,3-dicarbonyl compounds, including cyclohexane-1,3-diones, barbituric acid, and 2-thioxodihydropyrimidine-4,6(1H,5H)-dione, in the presence of (+/-)-camphor-10-sulfonic acid (CSA). These processes take place in water and involve the generation of two rings and five new bonds (two C-C, two C-N and one C = N) in a single synthetic operation, with expedient work-up and diminished waste generation due to the absence of extraction and purification steps. (C) 2011 Elsevier Ltd. All rights reserved.
One-pot construction of spirooxindole backbone via biocatalytic domino reaction
作者:Yi-Ru Liang、Yu-Jing Hu、Xue-Han Zhou、Qi Wu、Xian-Fu Lin
DOI:10.1016/j.tetlet.2017.06.031
日期:2017.7
A simple and environmentally friendly method to synthesize spiropyrazolo[3,4-b]pyridines derivatives starting from isatin, cyclic-1,3-diketone and 3-methyl-5-aminopyrazole was developed. With the optimized conditions for enzymes, solvents, enzyme loading and reaction time in hand, 9 compounds were obtained in acceptable yields. Moreover, the investigation in fluorescent properties of these products showed their potential application in the field of new fluorescent material. (C) 2017 Elsevier Ltd. All rights reserved.