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