Synthetic Studies on the Taxane Skeleton: Construction of Eight-Membered Carbocyclic Rings by the Intramolecular <i>B</i>-Alkyl Suzuki−Miyaura Cross-Coupling Reaction
Construction of eight-membered carbocyclic rings via the intramolecular B-alkyl Suzuki-Miyaura cross-coupling reaction has been studied. This protocol proved its potency through the formation of the eight-memberedring possessing a quaternary carbon on itsring in high yield, affording promise of a new access to the eight-memberedring of Taxol. [reaction: see text]
Highly enantio- and stereoselective preparation of some new chiral building blocks with baker's yeast or the CBS catalyst is described. (C) 2003 Elsevier Ltd. All rights reserved.