MP Cava,*l H. Firouzabadi, and M. Krieger ... Chemistry, Wayne State University, Detroit, Michigan 48202 Received October 30, 1973 ... Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19174, and Department of ... 1,2-Diphenylanthra[ blcyclobutadiene (4) has been synthesized by two different routes, one starting from 2,3- naphthalenedicarboxaldehyde and the other starting from diphenylcyclobutadienequinone. The red crystalline 4 ...