Diarylation of Alkenes by a Cu-Catalyzed Migratory Insertion/Cross-Coupling Cascade
摘要:
A strategy for the catalytic diarylation of alkenes is presented. The method involves the migratory insertion of alkenes into an Ar-Cu complex to generate a new C(sp(3))-Cu complex, which subsequently undergoes reaction with an aryl iodide to constitute a vicinal diarylation of an alkene. The method provides access to benzofuran- and indoline-containing products. Furthermore, highly diastereoselective examples are presented, allowing access to complex, stereochemically rich structures from simple alkene starting materials.
Practical Radical Cyclizations with Arylboronic Acids and Trifluoroborates
摘要:
Practical radical cyclizations using organoboronic acids and trifluoroborates take place in water, open to air, and In a scalable fashion employing catalytic silver nitrate and stoichiometric potassium persulfate. Both Pschorr-type cyclizations and tandem radical cyclization/trap cascades are described, Illustrating the utility of these mild conditions for the generation of polycyclic scaffolds.
Apparent 6‐
<i>endo‐</i>
trig Carbofluorination of Alkenes Enabled by Palladium‐Based Dyotropic Rearrangement
作者:Jing Gong、Qian Wang、Jieping Zhu
DOI:10.1002/anie.202211470
日期:2022.12.12
cyclization mode. Pd-catalyzed cyclization of 2-(2-alkylallyloxy)phenylboronic acid derivatives in the presence of Selectfluor 2 provides chromanes 3 with concurrent generation of a tertiary alkylfluoride function. A 5-exo-trig carbopalladation affords PdII intermediate A whose oxidation to PdIV followed by 1,2-aryl/PdIV dyotropic rearrangement and C−F bond-forming reductive elimination affords chromane
Copper-Catalyzed Regio- and Stereoselective Intermolecular Three-Component Oxyarylation of Allenes
作者:Taisuke Itoh、Yohei Shimizu、Motomu Kanai
DOI:10.1021/ol501022d
日期:2014.5.16
A copper(II)-catalyzed intermolecular three-component oxyarylation of allenes using arylboronic acids as a carbon source and TEMPO as an oxygen source is described. The reaction proceeded under mild conditions with high regio- and stereo-selectivity and functional group tolerance. A plausible reaction mechanism is proposed, involving carbocupration of allenes, homolysis of the intervening allylcopper(II), and a radical TEMPO trap.
Practical Radical Cyclizations with Arylboronic Acids and Trifluoroborates
作者:Jonathan W. Lockner、Darryl D. Dixon、Rune Risgaard、Phil S. Baran
DOI:10.1021/ol2023505
日期:2011.10.21
Practical radical cyclizations using organoboronic acids and trifluoroborates take place in water, open to air, and In a scalable fashion employing catalytic silver nitrate and stoichiometric potassium persulfate. Both Pschorr-type cyclizations and tandem radical cyclization/trap cascades are described, Illustrating the utility of these mild conditions for the generation of polycyclic scaffolds.
Diarylation of Alkenes by a Cu-Catalyzed Migratory Insertion/Cross-Coupling Cascade
作者:Wei You、M. Kevin Brown
DOI:10.1021/ja509056j
日期:2014.10.22
A strategy for the catalytic diarylation of alkenes is presented. The method involves the migratory insertion of alkenes into an Ar-Cu complex to generate a new C(sp(3))-Cu complex, which subsequently undergoes reaction with an aryl iodide to constitute a vicinal diarylation of an alkene. The method provides access to benzofuran- and indoline-containing products. Furthermore, highly diastereoselective examples are presented, allowing access to complex, stereochemically rich structures from simple alkene starting materials.