Sateesh R, Prudhviraj J, Priyanka C, Punna N. Access to CF
3-benzofulvenes
via palladium-catalyzed cascade arylation/Trost-Oppolzer cyclization/double-bond isomerization.
Chem Commun (Camb) 2024;
60:3551-3554. [PMID:
38456328 DOI:
10.1039/d3cc06082a]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Herein, we demonstrated a Pd-catalyzed cascade reaction that involves arylation, Trost-Oppolzer type Alder ene reaction, and double bond isomerization using the 4-(2-alkynylphenyl)-allylcarbonates and aryl boronic acids. This cascade process delivers a wide array of distinctive functionalized CF3-benzofulvenes in good yields with high stereoselectivity (E). A single palladium catalyst orchestrates the two individual reactions in a single operation. Trost-Oppolzer type Alder ene reaction is the key in this transformation, also called a rare acid-free iso-Nazarov type cyclization.
Collapse