
%0 Journal Article
%A Halton, B 
%A Russell, SGG 
%T Studies in the Cycloproparene Series: Cycloaddition Reactions With 1,3-Diphenylisobenzofuran
%J Australian Journal of Chemistry
%D 1990/12/01
%V 43
%N 12
%P 2099-2105
%K 
%R https://doi.org/10.1071/CH9902099
%U https://www.publish.csiro.au/paper/CH9902099 
%X The behaviour of cyclopropabenzene (1) with 1,3-diphenylisobenzofuran ( dpibf ) is temperature dependent. Addition to the strained bridge bond of (1) gives the Diels -Alder adduct (13) in tetrahydrofuran at 20&#176;C, but in chloroform at the same temperature the ring-expanded 5,10-epoxydibenzocycloheptene (12) is also formed. Compound (12) becomes the sole product from reaction at 30&#176;C or higher. Cyclopropa [b]naphthalene (2) is inert to dpibf under similar conditions but provides the dimer 6,13-dihydropentacene (15). The triazoloindazole (19) results from reaction of (2) with 4-phenyl-3H-1,2,4-triazole-3,5(4H)- dione. 
