Bimetallic Catalytic Tandem Reaction of Acyclic Enynones: Enantioselective Access to Tetrahydrobenzofuran Derivatives
Shulin Ge, Yongyan Zhang, Zheng Tan, Dawei Li, Shunxi Dong, Xiaohua Liu, Xiaoming Feng
Abstract
A highly efficient enantioselective synthesis of multisubstituted tetrahydrobenzofuran derivatives with four contiguous stereocenters was established by the dual catalysis of a gold(I)/chiral N,N′-dioxide-cobalt(II) complex via a tandem cycloisomerization/Diels–Alder reaction of 2-alkynyl-2-alkenones and electron-deficient olefins. This strategy was not only featured with atom economy, remarkable efficiency and stereoselectivity but also was highlighted by further transformations of the furan-based products into polycyclic molecules. Moreover, a possible transition-state model was proposed to elucidate the origin of stereoselectivity.
Topics & Concepts
ChemistryEnantioselective synthesisBimetallic stripTandemCatalysisCombinatorial chemistryStereoisomerismOrganic chemistryComposite materialMaterials scienceCatalytic Alkyne ReactionsAsymmetric Synthesis and CatalysisCyclopropane Reaction Mechanisms