Manganese(I) Catalyzed ortho C–H Allylation of Benzoic Acids
作者:Jonas Felix Goebel、Johanna Stemmer、Florian Belitz、Lukas J Goossen
DOI:10.1002/anie.202301839
日期:——
A simple manganese catalyst sets new standards in the ortho-C−H allylation of benzoates, by allowing nearly complete selectivity for mono- over competing di-allylation. The reaction can be combined with an in situ decarboxylation, giving access to allylarenes in substitution patterns that are otherwise hard to obtain. The scope of the protocol is demonstrated by 44 diverse examples.
Palladium‐Catalyzed Alkene Thioacylation: A C−S Bond Activation Approach for Accessing Indanone Derivatives
作者:Jianing Wu、Wen‐Hua Xu、Hong Lu、Peng‐Fei Xu
DOI:10.1002/adsc.202100293
日期:2021.6.21
alkene thioacylation reaction initiated by the activation of thioester C(acyl)−S bonds is reported. This approach successfully suppressed decarbonylation and β-hydrogen elimination with related acyl and alkyl metal thiolate intermediates, providing an efficient and atom-economical method to access indanone scaffolds. Mechanistic studies provide support for C(acyl)−Pd bondinsertion of olefins. The synthetic
Direct Benzylic CH Activation for CO Bond Formation by Photoredox Catalysis
作者:Ganesh Pandey、Sujit Pal、Ramkrishna Laha
DOI:10.1002/anie.201210333
日期:2013.5.3
Power of light: 1,4‐dicyanonaphthalene (DCN) and light directly activatesbenzylicCH bonds for intra‐ and intermolecular CO bond formation. Arylalkyls have also been transformed directly into aryl ketones using water as a source of oxygen. EDG=electron‐donating group, EWG=electron‐withdrawing group.