... (5); Ce +4 oxidation of 14 in H 2 O-MeCN gives an amidol via water capture of the iminium cation. (6); YS Jung, WH Swartz, W. Xu, PS Mariano, NJ Green, AG Schultz; J. Org. Chem., 57 (1992), p. 6037. (7); We have shown 1 that α-amino and α-amido radical additions to olefins not bearing electron withdrawing groups are slow relative to their oxidation by DCA. (8); P. Castro, LE Overman, XM Zhang, PS Mariano; Tetrahedron Lett. (1993) following paper. ...