ABSTRACT
Imines formed from a secondary cyclic amino acid and isatin afford thiazolo-oxazolidinone as the product via decarboxylative azomethine ylide formation. Subsequent 1,3-dipolar cycloaddition with dipolarophiles viz ethyl phenyl propiolate and methyl acrylate leads to novel spiro compounds. Structures and stereochemistry have been determined by detailed spectral and NOE studies.
ACKNOWLEDGMENT
We are thankful to CSIR, New Delhi for financial assistance.