Strategies and Tactics in Organic Synthesis: Chapter 10. Stereoselective Addition of Halogen to Conjugated Enynes and Its Application in the...

Strategies and Tactics in Organic Synthesis: Chapter 10. Stereoselective Addition of Halogen to Conjugated Enynes and Its Application in the...
ISBN-10
0128056134
ISBN-13
9780128056134
Series
Strategies and Tactics in Organic Synthesis
Category
Science
Pages
344
Language
English
Published
2013-07-29
Publisher
Elsevier Inc. Chapters
Authors
Wei Zhang, Jenny B. Werness, Weiping Tang

Description

Addition of halogen and nucleophiles to conjugated 1,3-enynes in a 1,4-fashion produces a chiral allene and a stereogenic center. The diastereo- and enantioselectivity of this process are discussed in detail. The 1,4-bromoetherification of 1,3-enynes can be applied to the synthesis of various bromoallene-containing natural products. Our diastereo- and enantioselective total synthesis of kumausallene is described in this chapter. The synthesis features a cascade reaction involving palladium-catalyzed desymmetrization and a DMF-mediated diastereoselective 1,4-bromoetherification reaction.

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