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Synthesis and Stereochemical Revision of the C31–C67 Fragment of Amphidinol 3
- Source :
- Angewandte Chemie International Edition. 57:6060-6064
- Publication Year :
- 2018
- Publisher :
- Wiley, 2018.
-
Abstract
- Amphidinol 3 (AM3) is a marine natural product produced by the dinoflagellate Amphidinium klebsii. Although the absolute configuration of AM3 was determined in 1999 by extensive NMR analysis and degradation of the natural product, it was a daunting task because of the presence of numerous stereogenic centers on the acyclic carbon chain and the limited availability from natural sources. Thereafter, revisions of the absolute configurations at C2 and C51 were reported in 2008 and 2013, respectively. Reported herein is the revised absolute configuration of AM3: 32S, 33R, 34S, 35S, 36S, and 38S based on the chemical synthesis of partial structures corresponding to the C31-C67 fragment of AM3 in combination with degradation of the natural product. The revised structure is unique in that both antipodal tetrahydropyran counterparts exist on a single carbon chain. The structural revision of AM3 may affect proposed structures of congeners related to the amphidinols.
- Subjects :
- Biological Products
Magnetic Resonance Spectroscopy
Natural product
010405 organic chemistry
Stereochemistry
Chemistry
Molecular Conformation
Absolute configuration
Stereoisomerism
General Medicine
General Chemistry
Nuclear magnetic resonance spectroscopy
Tetrahydropyran
Alkenes
010402 general chemistry
01 natural sciences
Chemical synthesis
Catalysis
Amphidinol 3
0104 chemical sciences
Stereocenter
chemistry.chemical_compound
Fragment (logic)
Pyrans
Subjects
Details
- ISSN :
- 15213773 and 14337851
- Volume :
- 57
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie International Edition
- Accession number :
- edsair.doi.dedup.....ce0e0e069f43527d71ce57e0ca55682f