... Spectator Catalysis of Leaving-Group Departure' 653 KS Venkatasubban2 and Richard L. Schowen* Department of Chemistry, University of Kansas, Lawrence, Kansas 66045-21 12 Receiued August 16, 1983 ... Page 2. 654 J. Org. Chem., Vol. 49, No. 4, 1984 ...