1
|
Liu HB, Imler GH, Baldridge KK, O'Connor RD, Siegel JS, Deschamps JR, Bewley CA. X-ray Crystallography and Unexpected Chiroptical Properties Reassign the Configuration of Haliclonadiamine. J Am Chem Soc 2020; 142:2755-2759. [PMID: 31986017 DOI: 10.1021/jacs.9b12926] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Haliclonadiamine and papuamine are bis-indane marine natural products isolated from the marine sponge Haliclona sp. Their relative structures were previously reported to differ by inversion at only one of their eight shared stereocenters. Here X-ray crystallography shows the opposite to be true: papuamine has a 1R,3S,8R,9S,14S,15R,20S,22R configuration, while haliclonadiamine has a 1S,3R,8S,9R,14R,15S,20R,22R configuration. Paradoxically the ECD of each structure displays a negative Cotton effect. X-ray crystallography reveals the two structures adopt similar conformations of their 13-membered macrocyclic core that comprises a configurationally relevant diene. B97x-D/Def2-TZVPP-(MeOH)-calculated ECD supports the diene configuration with the macrocycle dominating the ECD Cotton effect for haliclonadiamine and papuamine. Additional crystallographic and chiroptical analyses of three sponge samples from geographically distant locations indicate this pair of natural products always exists as a configurationally related couple. The co-discovery of a biosynthetic precursor, halichondriamine C, present in these same Haliclona samples must be considered when discussing any biosynthetic pathway. Taken together, this work justifies a reassignment of haliclonadiamine's structure and opens the question of how this complex stereochemical relationship between haliclonadiamine and palauamine arises biosynthetically.
Collapse
Affiliation(s)
- Hong-Bing Liu
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases , National Institutes of Health , Bethesda , Maryland 20892-0820 , United States
| | - Gregory H Imler
- Center for Biomolecular Science and Engineering , Naval Research Laboratory , Code 6930, Washington , D.C. 20375 , United States
| | - Kim K Baldridge
- Health Science Platform , Tianjin University , 92 Weijin Road, Nankai District , Tianjin 300072 , P.R. China
| | - Robert D O'Connor
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases , National Institutes of Health , Bethesda , Maryland 20892-0820 , United States
| | - Jay S Siegel
- Health Science Platform , Tianjin University , 92 Weijin Road, Nankai District , Tianjin 300072 , P.R. China
| | - Jeffrey R Deschamps
- Center for Biomolecular Science and Engineering , Naval Research Laboratory , Code 6930, Washington , D.C. 20375 , United States
| | - Carole A Bewley
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases , National Institutes of Health , Bethesda , Maryland 20892-0820 , United States
| |
Collapse
|
3
|
Vrettou M, Gray AA, Brewer AR, Barrett AG. Strategies for the synthesis of C2 symmetric natural products—a review. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.09.109] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
4
|
Nyerges M, Virányi A, Zhang W, Groundwater PW, Blaskó G, Tőke L. Synthesis of indazole-N-oxides via the 1,7-electrocyclization of azomethine ylides. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.08.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
5
|
Song Y, Takayama Y, Okamoto S, Sato F. An efficient synthesis of optically active five- and six-membered cyclic compounds with selectable stereo-controls by a Ti(II)-mediated cyclization of chiral secondary 2,7- and 2,8-enyn-1-ol derivatives. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02695-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
6
|
|
7
|
Fejes I, Nyerges M, Szöllõsy Á, Blaskó G, Tõke L. 2-Oxoindolin-3-ylidene derivatives as 2π components in 1,3-dipolar cycloadditions of azomethine ylides. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(00)01085-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|