
TY  - JOUR
A1  - Ferber, PH 
A1  - Gream, GE 
A1  - Kirkbride, PK 
A1  - Tiekink, ERT 
T1  - The Cycloaddition Reactions of Some 7-Alkylidenecycloocta-1,3,5-trienes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1990
VL  - 43
IS  - 3
SP  - 463
EP  - 484
KW  - 
UR  - https://doi.org/10.1071/CH9900463 
N2  - 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. 
ER  -

