An efficient method for the synthesis of spirooxindolopyrrolizidine/spirooxindolothiapyrrolizidine by the 1,3-dipolar cycloaddition of azomethine ylides generated via, decarboxylative condensation of 1,2-dicarbonyl compounds and L-proline/L-thiaproline/sarcosine with chalcones at ambient conditions with excellent yields has been described.
K. Revathy and A. Lalitha, RSC Adv., 2014, 4, 279 DOI: 10.1039/C3RA44627A
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