
%0 Journal Article
%A Ferber, PH 
%A Gream, GE 
%A Kirkbride, PK 
%A Tiekink, ERT 
%T The Cycloaddition Reactions of Some 7-Alkylidenecycloocta-1,3,5-trienes
%J Australian Journal of Chemistry
%D 1990/03/01
%V 43
%N 3
%P 463-484
%K 
%R https://doi.org/10.1071/CH9900463
%U https://www.publish.csiro.au/paper/CH9900463 
%X A number of 7-alkylidenecycloocta-1,3,5-trienes, all unstable, yield novel &#960;8+&#960;2 cycloadducts with a range of &#960;2-addends. The reactions of 7-methylenecycloocta-1,3,5-triene with ethene-tetracarbonitrile, 4- phenyl-1,2,4-triazoline-3,5-dione, diethyl azodicarboxylate and chlorosulfonyl  isocyanate are described. The tetraene did not react with maleic anhydride or dimethyl  acetylenedicarboxylate. As well, the reactions of 1,3,5-trimethyl-7-methylenecycloocta-1,3,5-triene, 2,9a- dihydro-1H-cyclopentacyclooctene and 1,2,3,10a- tetrahydrobenzocyclooctene with ethenetetracarbonitrile and of 7- isopropylidenecycloocta-1,3,5-triene with 4-phenyl-1,2,4-triazoline- 3,5-dione are discussed. The intermediacy of homotropylium zwitterions in the reactions is postulated. 
