Titanium-Mediated Alkylative Cyclizations of 1,3-Diene-Tethered Esters
作者:Long Guo Quan、Jin Kun Cha
DOI:10.1021/ol016350n
日期:2001.8.1
[reaction: see text]. An alkylative titanium-mediated cyclization reaction of 1,3-diene-tethered carboxylic esters has been developed by employing an in situ generated titanacyclopropane intermediate to afford trans-2-alkenyl cyclohexanols.
An Alternative Mechanism for the Cobalt-Catalyzed Isomerization of Terminal Alkenes to (<i>Z</i>)-2-Alkenes
作者:Anastasia Schmidt、Alexander R. Nödling、Gerhard Hilt
DOI:10.1002/anie.201409902
日期:2015.1.12
The cobalt‐catalyzed selective isomerization of terminal alkenes to the thermodynamically less‐stable (Z)‐2‐alkenes at ambient temperatures takes place by a new mechanism involving the transfer of a hydrogen atom from a Ph2PH ligand to the starting material and the formation of a phosphenium complex, which recycles the Ph2PH complex through a 1,2‐H shift.