HYDROLYSIS OF IMIDAZOLE-CONTAINING AMIDE ACETALS
HYDROLYSIS OF IMIDAZOLE-CONTAINING AMIDE ACETALS
复制标题
DOI：
10.1021/ja00346a046
复制
发表时间：
1983-01-01
影响因子：
15
通讯作者：
ULAN, JG
中科院分区：
文献类型：
--
作者：
BROWN, RS;ULAN, JG
空穴的形成（电离）被预测为加速各种周环反应，特别是那些高度非同步过渡态是容易接近的。阳离子自由基Diels-Alder反应路径具有协同和高度非同步的特点。[2+ 1]环加成的反应路径呈现为两步序列。中间体长键环丁烷阳离子自由基是通过非同步过程形成的，但在这个通常的中间体中的单电子键能够保持立体化学关系。还讨论了阳离子自由基科普反应和环丁烯阳离子自由基的逆电环裂解的反应路径。
Hole formation (ionization) is predicted to accelerate a variety of pericyclic reactions, especially those in which highly non-synchronous transition states are readily accessible. The cat-ion-radical Diels-Alder reaction path is characterized as concerted and highly nonsynchronous. The reaction path for the [2+ 1] cycloaddition emerges as a two-step sequence. An intermediate long-bond cyclobutane cation radical is formed via a nonsynch-ronous process, but the one-electron bonding in this usual intermediate is capable of maintaining stereochemical relationships. Reaction paths for the cation-radical Cope reaction and for the retroelectrocyclic cleavage of the cyclobutene cation radical are also discussed.