Efficient and Selective Formation of Macrocyclic Disubstituted Z Alkenes

  • ChemPubSoc Europe Logo
  • Author: Evenda Dench
  • Published Date: 27 January 2013
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Efficient and Selective Formation of Macrocyclic Disubstituted <em>Z</em> Alkenes

Related Societies

Routes to countless molecules, natural products or otherwise, with one or more cyclic moieties have contained a ring-closing metathesis (RCM) reaction that generates a small-, medium-, or large-ring olefin.

The first class of catalytic olefin metathesis reactions that provide high efficiency and Z selectivity for the synthesis of macrocyclic disubstituted alkenes has been developed. Transformations are promoted by catalysts developed by A. H. Hoveyda, R. R. Schrock and colleagues at Boston College and Massachusetts Institute of Technology, both USA, who performed the research in collaboration with D. J. Dixon and co-workers at the University of Oxford, UK.

A variety of large-ring structures can be prepared stereoselectively through transformations promoted by Mo- or W-based monoaryloxide pyrrolide catalysts. Unprecedented levels of efficiency and stereoselectivity are delivered, and yields are near-doubled in cases where previous catalytic systems afforded a mixture of typically inseparable olefin isomers. These catalytic Z-selective cyclizations can be performed efficiently on gram scale with complex-molecule starting materials and catalysts that can be handled in air. Utility of the reaction is illustrated through the total syntheses of five natural products, including the anticancer and antibacterial agents epothilones A and C and nakadomarin A.

Article Views: 2750

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter

A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH