Page 1. Tetrehedrcm Letters. Vol. 34, No. 36, pi. ... 0040-4039/93 56.00 + MI Perg- Press Lid Synthesis and Reactions of 2,3-Diazabicyclo[2.2.llhept-5-ene Cun-Xiao Wang and Robert S. Sheridan* Department of Chemistry, University of Nevada Reno. Nevada 89557 ...