The Effect of Pressure on Sigmatropic Rearrangements of Seven-Membered Conjugated Systems. [3,3] and [1,9] Sigmatropies
作者:Shigeru Sugiyama、Akira Mori、Nobuo Kato、Hitoshi Takeshita
DOI:10.1246/bcsj.62.1143
日期:1989.4.15
The kinetic features of the [1,9] sigmatropy (with 2-benzyloxy-3-bromotropone) and the [3,3] sigmatropy (with 2-allyloxytropone and 2-[(3-methyl-2-butenyl)oxy]tropone) were investigated under various pressures (1 to 1600 bar). The activation volume of [1,9] sigmatropy was of the same order as those of [1,5] sigmatropy of cyclopentadienes. The activation volume of [3,3] sigmatropy of more sterically-hindered
[1,9] sigmatropy(含 2-benzyloxy-3-bromotropone)和 [3,3] sigmatropy(含 2-allyloxytropone 和 2-[(3-methyl-2-butenyl)oxy]tropone)的动力学特征) 在各种压力(1 至 1600 巴)下进行了研究。[1,9] sigmatropy的活化体积与环戊二烯的[1,5] sigmatropy的活化体积相同。更多空间位阻底物的 [3,3] sigmatropy 的激活体积比未受阻底物的更负。