The Synthesis of 3-Spirooxindole Derivatives. II. Syntheses of 1-Methylspiro-[indoline-3, 1'-pyrrolizidine and Indolizidine]-2-one.

Abstract

The syntheses of 1-methyl spiro[indoline-3, 1'-pyrrolizidine and -indolizidine]-2-one are described. The latter was obtained as two diastereoisomers, the stereochemistry of which was discussed mainly by their infrared absorption spectra.