Chemistry Letters p. 979 - 982 (1981)
Update date:2022-09-26
Topics:
Takahashi, Kazuo
Takase, Kahei
Toda, Hideo
The steric effect on the cycloheptatriene (CHT) - norcaradiene (NCD) equilibrium has been studied in simple 7-alkyl-7-cyanocycloheptatrienes, such as 7-ethyl-, 7-benzyl-, 7-isopropyl-, 7-cyclopropenyl-, and 7-tert-butyl-7-cyanocycloheptatrienes.The NCD component increases with bulkiness of the 7-alkyl group in this order, but the cycloheptatriene carrying an extremely bulky 7-tert-butyl group is out of this order.
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(2004)Doi:10.1002/anie.201307788
(2013)Doi:10.1016/j.tetlet.2004.09.061
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(1982)
