Three‐Component Difunctionalization of Cyclohexenyl Triflates: Direct Access to Versatile Cyclohexenes via Cyclohexynes
作者:Seoyoung Cho、E. J. McLaren、Qiu Wang
DOI:10.1002/anie.202109482
日期:2021.12.6
dicarbofunctionalization, aminohalogenation and aminocarbonation of readily available cyclohexenyl triflates, via strained cyclic alkyne intermediates generated in situ. The importance and utility of this method is exemplified by the modularity of this approach and the ease in which even highly complex polycyclic scaffolds can be accessed in one step.
Boronic Acid Catalyzed Friedel−Crafts Reactions of Allylic Alcohols with Electron-Rich Arenes and Heteroarenes.
作者:J. Adam McCubbin、Hamidreza Hosseini、Oleg V. Krokhin
DOI:10.1021/jo9023073
日期:2010.2.5
allylic alcohols with a variety of electron-rich aromatic and heteroaromatic substrates under ambient conditions. The commercially available catalyst is recoverable and air and moisture stable, and the reaction produces water as the only byproduct.
A Versatile Route to 2-Substituted Cyclic 1,3-Dienes via a Copper(I)-Catalyzed Cross-Coupling Reaction of Dienyl Triflates with Grignard Reagents
作者:A. Sofia E. Karlström、Magnus Rönn、Atli Thorarensen、Jan-E. Bäckvall
DOI:10.1021/jo971737i
日期:1998.4.1
A general synthesis of 2-substituted cyclic1,3-dienes in two steps from alpha,beta-unsaturated ketones has been developed. Formation of a dien-2-yl triflate followed by a copper(I)-catalyzed cross-coupling reaction with a Grignard reagent gives 2-substituted dienes in fair to excellent yields. Alkyl, aryl, and allyl Grignard reagents can be used.
Reduced to the max: Halogenated polycyclic hydrocarbons can be reduced with calcium via two different pathways yielding radical anions due to electron transfer into the π*‐orbital or Grignard‐type reagents due to insertion of Ca into the carbonhalogen bond (see figure).
IBS-Catalyzed Oxidative Rearrangement of Tertiary Allylic Alcohols to Enones with Oxone
作者:Muhammet Uyanik、Ryota Fukatsu、Kazuaki Ishihara
DOI:10.1021/ol9013188
日期:2009.8.6
A 2-iodoxybenzenesulfonic acid (IBS)-catalyzed oxidative rearrangement of tertiary allylic alcohols to enones with powdered Oxone in the presence of potassium carbonate and tetrabutylammonium hydrogen sulfate has been developed.