STUDIES ON ENOL CARBONATE CHEMISTRY:STEREOSELECTIVE CONSTRUCTION OF VICINAL QUATERNARY BENZYLIC CENTERS IN THE BIS-OXINDOLE SERIES

摘要

The Steglich-type intramolecular acyl transfer of bis-oxindole enol carbonate derivatives 9a-c affords selectively the monorearranged products 11a-c.In turn,Pd(0)-mediated allyl transfer of the bis-Alloc derivative 9c allows an efficient double C-allylation leading preferentially to the d/l isomer.