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Irie R, Hitora Y, Watanabe R, Clark H, Suyama Y, Sekiya S, Suzuki T, Takada K, Matsunaga S, Hosokawa S, Oikawa M. Stereochemical Assignment of the 36-Membered Macrolide Ring Portion of Poecillastrin C. Org Lett 2024; 26:5290-5294. [PMID: 38864719 DOI: 10.1021/acs.orglett.4c01632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Absolute configuration at 12 stereocenters in the 36-membered macrocyclic ring portion of poecillastrin C (1) was disclosed by chemical degradation and NMR analyses of 1, chemical synthesis, and molecular modeling techniques.
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Affiliation(s)
- Raku Irie
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
- Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Yuki Hitora
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Ryuichi Watanabe
- Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama 236-8648, Japan
| | - Hugh Clark
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yu Suyama
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Shinji Sekiya
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Toshiyuki Suzuki
- Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama 236-8648, Japan
| | - Kentaro Takada
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Shigeki Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Seijiro Hosokawa
- Department of Applied Chemistry, Faculty of Advanced Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masato Oikawa
- Yokohama City University, Seto 22-2, Kanazawa-ku, Yokohama 236-0027, Japan
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Ogawa Y, Hayashi S, Oikawa M, Otani C, Kawase K. Interference terahertz label-free imaging for protein detection on a membrane. OPTICS EXPRESS 2008; 16:22083-9. [PMID: 19104643 DOI: 10.1364/oe.16.022083] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We demonstrate a highly sensitive imaging method combined a terahertz time-domain spectroscopy and an interference effect for label-free protein detection on a polyvinylidene difluoride membrane. The method is based on terahertz time-domain spectroscopy and uses an interference effect. Biotin is linked to the membrane using poly ethylene glycol or poly ethylene glycol methyl ether to prevent it from being washed off. Binding of the biotin with streptavidin is then observed by measuring the terahertz signal change due to the variation of the membrane refractive index. We demonstrate the detection of the binding streptavidin protein in gradually decreasing concentrations, down to 27 ng mm-2, using the image recorded at 1.5 THz.
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Affiliation(s)
- Yuichi Ogawa
- Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-Amamiya-machi, Aoba-ku, Sendai 981-8555, Japan.
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Ikoma M, Oikawa M, Sasaki M. Chemospecific Allylation and Domino Metathesis of 7-Oxanorbornenes for Skeletal and Appendage Diversity. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800781] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Yang G, Zhang H, Huang Y, Chen Z. Synthesis of Methyl N‐Aryl Oxamate Using Soluble Polymer Support. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910500408357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Guichun Yang
- a Faculty of Chemistry and Material Science , Hubei University , Wuhan, Hubei, China
| | - Haiqing Zhang
- a Faculty of Chemistry and Material Science , Hubei University , Wuhan, Hubei, China
- b Faculty of Chemical Engineering, Resources and Environment , Wuhan University of Science and Technology , Wuhan, Hubei, China
| | - Yanling Huang
- a Faculty of Chemistry and Material Science , Hubei University , Wuhan, Hubei, China
| | - Zuxing Chen
- a Faculty of Chemistry and Material Science , Hubei University , Wuhan, Hubei, China
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Oikawa M, Ikoma M, Sasaki M. Simultaneous accumulation of both skeletal and appendage-based diversities on tandem Ugi/Diels–Alder products. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.147] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oikawa M, Takeda Y, Sasaki M. 2-Oxo-1,2-ethylenedioxy group as a linker for solution-, liquid-, and solid-phase syntheses to discover drug-like small molecules. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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