Cascade Multicomponent Assemblies Involving 1,3-Enynes via Auto-Tandem Palladium Catalysis
Ze-Liang He, Yi Zhang, Zhichao Chen, Wei Du, Ying‐Chun Chen
Abstract
Here we report a three-component auto-tandem reaction of 1,3-enyne-tethered carbonyls, organoboronic reagents, and suitable nucleophiles catalyzed by palladium, proceeding through consecutive intramolecular vinylogous addition, Suzuki coupling, and allylic alkylation. This process exhibited high chemo- and regioselectivity with 1,3,4-trifunctionalization of the 1,3-enyne motif, and a wide range of 2H-chromenes, 1,2-dihydroquinolines, benzo[b]oxepines, 1,7-annulated indoles, and other frameworks were efficiently constructed in fair to good yields and E/Z selectivity.
Topics & Concepts
ChemistryPalladiumEnyneTandemIntramolecular forceRegioselectivityNucleophileTsuji–Trost reactionCombinatorial chemistryCatalysisCascade reactionReagentAllylic rearrangementSelectivitySuzuki reactionStereochemistryOrganic chemistryComposite materialMaterials scienceCatalytic C–H Functionalization MethodsCatalytic Cross-Coupling ReactionsSynthetic Organic Chemistry Methods