Desymmetrization of Vicinal Bis(boronic) Esters by Enantioselective Suzuki–Miyaura Cross-Coupling Reaction
Mingkai Zhang, Paul S. Lee, Christophe Allais, Robert A. Singer, James P. Morken
Abstract
1,2-diborylcycloalkanes is described. This reaction provides a modular route to enantiomerically enriched substituted carbocycles and heterocycles that retain a synthetically versatile boronic ester. With appropriately constructed substrates, compounds bearing additional stereogenic centers and fully substituted carbon atoms can be generated in a straightforward fashion. Preliminary mechanistic experiments suggest that substrate activation arises from the cooperative effect of vicinal boronic esters during the transmetalation step.
Topics & Concepts
ChemistryDesymmetrizationEnantioselective synthesisVicinalCatalysisCoupling reactionBoronic acidSuzuki reactionCombinatorial chemistryOrganic chemistryPalladiumCatalytic Cross-Coupling ReactionsOrganoboron and organosilicon chemistryChemical synthesis and alkaloids