
TY  - JOUR
A1  - Adeney, M 
A1  - Brown, RFC 
A1  - Coulston, KJ 
A1  - Eastwood, FW 
A1  - James, IW 
T1  - Flash Vacuum Pyrolysis of Phenanthrene-3,4-dicarboxylic Anhydride and of Cyclobuta[c]-phenanthrene-1,2-dione: Products of Ring Contraction, Insertion and Ring Cleavage
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1991
VL  - 44
IS  - 7
SP  - 967
EP  - 980
KW  - 
UR  - https://doi.org/10.1071/CH9910967 
N2  - Flash vacuum pyrolysis of phenanthrene-3,4-dicarboxylic anhydride and of cyclobuta [c]phenanthrene-1,2-dione (860-70&#176;/0.02-0.04 mm) gave a pyrolysate containing 1-ethynylacenaphthylene, 3-ethynylacenaphthylene and phenanthrene. The identity of the two ethynes was confirmed by synthesis. The results are interpreted in terms of a reaction sequence involving aryne formation, ring contraction, carbene insertion and ring cleavage of a highly strained intermediate. 
ER  -

