72659-35-9

Upstream product

• 872-36-6 vinylene carbonate 
• 5660-91-3 1,3-diphenyl-2H-cyclopenta<1>phenanthren-2-one 
• 56406-98-5 Cyclic carbonate ester of 1,2,3,4-tetrahydro-2,3-dihydroxy-1,4-diphenyl-1,4-methanotriphenylen-13-one 

Downstream Products

• 72659-37-1 Acetic acid 2-acetoxy-1,4-diphenyl-1,2-dihydro-triphenylen-1-yl ester 
• 72659-36-0 l,4-Diphenyl-1,2-dihydrotriphenylene-1,2-diol 

Relevant academic research and scientific papers

Formation of an Unsual Fused-Ring Cyclic Carbonate and Its Photolytic Rearrangement into the Novel Heterocycle 2,5-Diphenylphenanthrooxepin

Vinylene carbonate (1) and phencyclone (2) react in refluxing bromobenzene to yield the cyclic carbonate ester of 1,4-diphenyl-1,2-dihydrotriphenylene-1,2-diol (90percent,3), presumably by decarbonylation of the intermediate Diels-Alder adduct 6 followed by a shift of the carbonate moiety.On photolysis (254 nm) 3 undergoes conversion to 1,4-diphenyltriphenylen-2-ol (15percent,9) and 2,5-diphenylphenanthrooxepin (43percent,8), the first example of the hitherto unknown phenanthrooxepin ring system.The structural assignments for 3 and 9 are based on spectroscopic andchemical evidence, while that of 8 follows unequivocally from single-crystal X-ray analysis.A possible rationalization for the formation of 8 and 9 from 3 is discussed, and evidence is presented which indicates that oxepin 8, rather than arene oxide 14, is the major component of any equilibrium which may exist between these two valence tautomers.