Allenes for Versatile Iron-Catalyzed C–H Activation by Weak O-Coordination: Mechanistic Insights by Kinetics, Intermediate Isolation, and Computation
作者:Antonis M. Messinis、Lars H. Finger、Lianrui Hu、Lutz Ackermann
DOI:10.1021/jacs.0c04837
日期:2020.7.29
ortho-regioselectivity in proximity to the weakly-coordinating carbonyl group for a range of substituted phenones and allenes. Detailed mechanistic studies, including the isolation of key intermediates, the structural characterization of an iron-metallacycle and kinetic analysis, allowed the sound elucidation of a plausible catalytic working mode. This mechanistic rationale is supported by detailed computational
Metal Triflate–Catalyzed Se-Se Bond Cleavage and the Selective Additions Under Mild Conditions
作者:Lei Yu、Lingfeng Ren、Rong Guo、Tian Chen
DOI:10.1080/00397911.2010.494813
日期:2011.7.1
Abstract Metal triflate–catalyzed Se-Se bond cleavage would generate selenyl cations, which could add to activated C=C double bond selectively. The reaction conditions were mild and could be easily handled. The cleavage of Se-Se bond in this novel way undermildconditions might expand the view of organic synthesis and facilitate new synthetic strategies.
The electrophilic cyanation of allylic boranes, a process that is applicable to the construction of allylic quaternary carbon centers, is reported. The reaction has a broad substrate scope with a high functional group tolerance. The results represent an unprecedented and powerful tool for preparing synthetically useful β,γ-unsaturated nitriles, including derivatives that have been difficult to access