73240-58-1

Upstream product

• 24009-91-4 (1R,2R,5S,6S)-7,8-Diaza-tricyclo[4.2.2.0^2,5]deca-3,9-diene-7,8-dicarboxylic acid diethyl ester 
• 479-33-4 2,3,4,5-tetraphenylcyclopenta-2,4-dienone 

Downstream Products

• 73249-36-2 4,5,6,7-tetraphenyl-11,12-diazapentacyclo<8,2,2,0^2,90^3,70^6,8>tetradeca-4,13-dien-11,12-dicarboxylate 
• 73240-60-5 endo-anti-1,10,11,12-tetraphenyltetracyclo<8,2,1,0^2,90^3,8>trideca-4,6-11-trien-13-one 

Relevant academic research and scientific papers

PERICYCLIC TRANSFORMATIONS OF TETRACYCLO2,903,8>TRIDECA-4,6,11-TRIENES, AND FORMATION OF DIHYDROSEMIBULLVALENES BY THERMAL INTRAMOLECULAR?4a+?2a>CYCLOADDITION IN SUBSTITUTED CYCLOOCTATRIENES

Cyclopentadienones react with certain cyclobutene dienophiles to give the anticipated carbonyl bridge adducts; these, on relatively mild thermolysis, yield dihydrosemibullvalene derivatives by a novel sequence including cheletropic loss of carbon monoxide, electrocyclic ring opening of immediate substituted bicyclooctadienes, and intramolecular ?4a + ?2a>cycloaddition of the derived cyclooctatrienes.Other pericyclic reactions of compounds related to those of the title compounds are also discussed.