Steric and electronic effects on the conformations and singlet oxygen ene regiochemistries of substituted tetramethylethylenes. The origin of the geminal effect
The enereaction of N-Phenyl-1,2,4-triazoline-3,5-dione with alkenes shows a remarkable preference for hydrogen abstraction from the group which is geminal to the larger substituent of the double bond. These results require that the dominant effect in the transition state of the enereaction is the nonbonded interactions.
A comparison of the ene reactions of singlet oxygen and triazolinediones with alkyl substituted tetramethylethylenes.
作者:Edward L. Clennan、Jaya J. Koola、Kristine A. Oolman
DOI:10.1016/s0040-4039(00)97164-8
日期:1990.1
The reactions of triazolinediones and singletoxygen are compared in their reactivity towards a series of tetrasubstituted olefins. The different regiochemistries of these reactions are discussed.
比较了三唑啉二酮和单线态氧对一系列四取代烯烃的反应性。讨论了这些反应的不同区域化学。
The nucleophilic contribution of the solvent in olefin bromination. I. Steric inhibition to nucleophilic solvation in alkene bromination via brominium ions
作者:Marie Francoise Ruasse、Ben Li Zhang
DOI:10.1021/jo00191a031
日期:1984.8
Fragmentation of tertiary alkyl carbonium ions in sulphuric acid : steric effects.