Unsaturated macrocyclic compounds. LXXVII. Synthesis of 4,5-tetramethylene-2,6,8,14-tetradehydro[15]annulenone, and aromatic macrocyclic ketone. Demonstration of a diamagnetic ring current in a [4n + 3] annulenone derivative
Unsaturated eight-membered ring compounds. X. 1,2,3,4,7-cyclooctapentaene, a possible intermediate in the conversion of cis,cis-3,5-octadiene-1,7-diyne to benzocyclobutadiene dimer