Tetrahedron Letters p. 205 - 208 (1983)
Update date:2022-08-05
Topics:
Takahashi, Kazuko
Nishijima, Kazumi
Takase, Kahei
Katagiri, Shigeyoshi
The title compound 6 has been synthesized and the effect of cyclic ?-system insertion into diphenylcyclopropenone 1 has been discussed.The distribution of positive charge over the 3-membd. ring and phenyl groups slightly predominates in 6 than in parent annulenone 1, in contrast to 5-cycloheptatrienylidene-2(5H)-tiophenone 5 whose 7-membd. ring is more olefinic than parent tropone 2.Electronic spectrum of 6 exhibits a broad absorption band having a C-T character.
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