e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
The Pyrolysis of Butatrienone Precursors: 3, 4-Diazatricyclo [5.2. 1.02, 6] deca-3, 8-diene-endo-cis-2, 6-dicarboxylic anhydride and Its 5, 5-Diphenyl Derivative
MR Anderson, RFC Brown, NR Browne…
Index: Anderson, Mark R.; Brown, Roger F. C.; Browne, Neil R.; Eastwood, Frank W.; Fallon, Gary D.; et al. Australian Journal of Chemistry, 1990 , vol. 43, # 3 p. 549 - 560
Abstract Flash vacuum pyrolysis of the title anhydride (4) gave a poor yield of butatrienone, detected by argon matrix isolation infrared spectroscopy. Similar pyrolysis of the 5, 5- diphenyl derivative (8) failed to give diphenylbutatrienone; the red product (16) is considered to have been formed by dimerization of an intermediate 2H- indenylidenemethanone (15). The crystal structure of (16) has been determined.
[Brown, Roger F. C.; Coulston, Karen J.; Eastwood, Frank W.; Gatehouse, Bryan M.; Guddatt, Luke W.; et al. Australian Journal of Chemistry, 1984 , vol. 37, # 12 p. 2509 - 2524]
