Current Catalysis

Shaobin Wang  
Curtin University
Perth, WA 6845 U1987


Sodium Carbonate Sesquiperhydrate (2Na2CO3-3H2O2) Catalysed One-pot Synthesis of Biologically Dynamic Novel Substituted Spirooxirane Dicarboxamides

Author(s): Anshu Dandia, Ashok Kumar Laxkar, Sumit Bhaskaran.


Sodium carbonate sesquiperhydrate catalyzed efficient one-pot synthesis of novel spiro[indoline-3,2'- oxirane]dicarboxamides was achieved via Knoevenagel adduct of isatin with malononitrile as the key step followed by a sequential tandem reaction. The Knoevenagel adduct transpires into oxirane with the geminal dicyano functionality being hydrolysed in to corresponding dicarboxamide. Further extension of the scope of reaction with various other cyclic ketone such as 9H-fluoren-9-one, 1H-indene-1,2,3-trione and cycloheptanone was found to be equally feasible as well as efficient, rendering the final spiro compounds in good yields. This method has the advantages of short synthetic route, operational simplicity, shorter reaction times, for small scale high-speed synthesis and is environmentally benign. The structure elucidation and attribution of relative stereochemistry were unequivocally determined by X-ray structural analysis.

Keywords: Epoxidation, spirooxindole, Knoevenagel adduct, geminal dicyano functionality, sodium hypochlorite, rhodium(II)acetate catalyst, trichloroisocyanuric acid, dimethyldioxirane, peptide hydrolase inhibitors, scaffold, melanoma, Na2CO3, column chromatography, mechanistic pathway, malononitrile

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Article Details

Year: 2012
Page: [171 - 179]
Pages: 9
DOI: 10.2174/2211544711201030171
Price: $58