Novel Concepts in Directed Biaryl Synthesis. Part 76. First Synthesis of Mastigophorenes A and B, by Biomimetic Oxidative Coupling of Herbertenediol. -The first synthesis of the title compounds (I), which are atropisomers, by oxidative phenolic coupling of partially protected derivatives of their j
First synthesis of mastigophorenes A and B, by biomimetic oxidative coupling of herbertenediol
β Scribed by Gerhard Bringmann; Thomas Pabst; David S. Rycroft; Joseph D. Connolly
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- French
- Weight
- 206 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The first synthesis of mastigophorenes A and B by oxidative phenolic coupling of partially protected derivatives of their joint natural monomeric half, herbertenediol, is described. The synthesis starts from this diol itself or from the corresponding aldehyde, both available by isolation from the liverwort, Herbertus aduncus. After transformation of herbertenediot to a chemically appropriate monophenolic coupling precursor, the oxidative dehydrodimerization was brought about using (ten-BuO)z, followed by deprotection to give mastigophorenes A and B in their 'natural' atropisomeric ratio, as isolated from the liverwort.
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Total Syntheses of (-)-Herbertenediol (I), (-)-Mastigophorene A (II), and (-)-Mastigophorene B (III). Combined Utility of Chiral Bicyclic Lactams and Chiral Aryl Oxazolines.