The Effect of Pressure on Sigmatropic Rearrangements of Seven-Membered Conjugated Systems. [1, 5] Sigmatropy
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The kinetic analysis of the [1,5] sigmatropy of 3,3-diphenyl-3,3a-dihydrocyclohepta[b]-furan-2-one was carried out under various pressures (1 to l600 bar). The activation volume of the [1,5] process of the cycloheptatriene was considerably less negative than that of either [1,5] sigmatropy of cyclopentadienes or [3,3] and [1,9] processes of tropones. This is due to an increase of a free radical character in the transition state in terms of a long-distance movement of the migrating groups.
- 九州大学大学院総合理工学研究科の論文
- 1990-12-01
九州大学大学院総合理工学研究科 | 論文
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