... We thank J. Costa, 0. Evans, and L. Guttierez for technical assis- tance ... H. Obermann, M. Spiteller-Friedmann, and G. Spiteller, Chem. ... I). Since then, rearrangements of a wide va- riety of NP-keto-substituted saccharins have been stud- ied.2asb Our interest in the chemistry of ring ...