reported. The reaction proceeds via the cleavage of a carbon–hydrogen bond at the position ortho to an alkynylgroup, and no additives are needed. Platinum complexes bearing other common ligands, such as phosphines and NHCs, failed to promote this reaction, highlighting the utility of the silylene ligand in this reaction.
Rhodium/Phosphine/Amineâ HBr Catalyst System for Highly Selective Cross-Cyclodimerization of Aryl- and Alkylalkynes: Efficient Access to Multisubstituted Naphthalene Derivatives
Trinity: The combination of rhodium/phosphine/amine⋅HBr enables the highlyselective catalytic cross‐cyclodimerization of diarylacetylenes with aliphatic alkynes to afford the corresponding multiply substituted naphthalenes in good‐to‐high yields. The catalystsystem also allows the use of some alkenes as the coupling partners, which provides a facile route to highly functionalized dihydronaphthalenes
Electrochemical Rhodium-Catalyzed C–H Cyclodimerization of Alkynes to Access Diverse Functionalized Naphthalenes: Involvement of Rh<sup>IV/V</sup> and Rh<sup>I</sup> Dual Catalysis
作者:Ziyi Guo、Junjie Zhang、Jitan Zhang、Meihua Xie
DOI:10.1021/acs.orglett.2c03122
日期:2022.10.28
The first electrochemical rhodium-catalyzedC–H cyclodimerization of alkynes for the direct construction of functionalized naphthalenes was reported. The practicality and synthetic value of this strategy were demonstrated by the readily accessible scale-up synthesis and transformation of the products. Detailed mechanistic studies evidenced that electricity played an important role during the electrochemical