... David. W. Emerson,* Richard L. Titus,* and Rowena M. Gonzaez Department of Chemistry, The University of Nevada, Las Vegas, Lae Vegas, Nevada 89154-4003 Received March 6,1991 ... (c) Snyder, HR; Brooks, L. A.; Shapiro, S. H. Organic Syntheses; Blatt ... J. Org. Chem., Vol. ...