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.
Reaction paths and mechanisms in the catalytic cycloaddition of allene over nickel(0) template systems
作者:Sei Otsuka、Kazuhide Tani、Tsuneaki Yamagata
DOI:10.1039/dt9730002491
日期:——
Catalyticcycloadditions of allene, CH2CCH2, have been effected with a variety of nickel(0)–phosphorus ligand systems. The selective catalyticreactionpath leading to the cyclotetramer, cyclotetramer, or cyclopentamer depends primarily on the nature of the ligands. Intermediate nickel(0) complexes containing the linear trimer (C9H12) or tetramer (C12H16) have been detected spectroscopically or isolated
艾伦(CH 2 C CH 2)的催化环加成反应已通过多种镍(0)-磷配体系统实现。导致环四聚体,环四聚体或环戊二烯的选择性催化反应路径主要取决于配体的性质。包含线性三聚体(C 9 H 12)或四聚体(C 12 H 16)的中间体镍(0)配合物)已通过光谱检测或通过磷配体稳定化分离。基于分离的配合物的结构和动力学,描述了多步反应路径,并讨论了磷配体在这些催化剂中的作用。
Evidence for a carbonium ion rearrangement in the reaction of triisobutylaluminum and 1,3,3-trimethylcyclopropene
作者:Herman G. Richey、Barry Kubala、Mark A. Smith
DOI:10.1016/s0040-4039(01)81934-1
日期:1981.1
Formation of acyclic products in the reaction of triisobutylaluminum and 1,3,3- trimethylcyclopropene can reasonably be ascribed to a carboniumionrearrangement. This suggestion supports the mechanism for carbalumination of alkenes proposed by Eisch.