Abstract
Various spiro-pyrano[3,2-b]pyrrolo-2-oxoindolines 3a-d and dicyano-pyrano[3,2-b]pyrroles 5a-e have been synthesized in the present study by Michael addition of 3-pyrrolidinones 1 to isatin-3-ylidenes 2 and arylidenemalononitrile 4. Hexahydro-4-oxo-1-aryl-pyrimidine-5-carboxylic acids 7a,b were synthesized from 1 by Schmidt rearrangement.