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Kanamori T, Matsuyama A, Naito H, Tsuga Y, Ozako Y, Ogura SI, Okazaki S, Yuasa H. Water-Soluble Glucosyl Pyrene Photosensitizers: An Intramolecularly Synthesized 2-C-Glucoside and an O-Glucoside. J Org Chem 2018; 83:13765-13775. [DOI: 10.1021/acs.joc.8b02066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Kanamori
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Akira Matsuyama
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Hidenori Naito
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Yuki Tsuga
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Yoshiki Ozako
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Shun-ichiro Ogura
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
| | - Shigetoshi Okazaki
- Department of Medical Spectroscopy, Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, Handayama 1-20-1, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan
| | - Hideya Yuasa
- School of Life Science and Technology, Tokyo Institute of Technology, J2-10 4259 Nagatsuta, Midoriku, Yokohama 226-8501, Japan
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Yi D, Zhu F, Walczak MA. Stereoretentive Intramolecular Glycosyl Cross-Coupling: Development, Scope, and Kinetic Isotope Effect Study. Org Lett 2018; 20:4627-4631. [DOI: 10.1021/acs.orglett.8b01927] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Duk Yi
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Feng Zhu
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Maciej A. Walczak
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
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Zhu F, Rodriguez J, Yang T, Kevlishvili I, Miller E, Yi D, O'Neill S, Rourke MJ, Liu P, Walczak MA. Glycosyl Cross-Coupling of Anomeric Nucleophiles: Scope, Mechanism, and Applications in the Synthesis of Aryl C-Glycosides. J Am Chem Soc 2017; 139:17908-17922. [PMID: 29148749 DOI: 10.1021/jacs.7b08707] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Stereoselective manipulations at the C1 anomeric position of saccharides are one of the central goals of preparative carbohydrate chemistry. Historically, the majority of reactions forming a bond with anomeric carbon has focused on reactions of nucleophiles with saccharide donors equipped with a leaving group. Here, we describe a novel approach to stereoselective synthesis of C-aryl glycosides capitalizing on the highly stereospecific reaction of anomeric nucleophiles. First, methods for the preparation of anomeric stannanes have been developed and optimized to afford both anomers of common saccharides in high anomeric selectivities. We established that oligosaccharide stannanes could be prepared from monosaccharide stannanes via O-glycosylation with Schmidt-type donors, glycal epoxides, or under dehydrative conditions with C1 alcohols. Second, we identified a general set of catalytic conditions with Pd2(dba)3 (2.5 mol%) and a bulky ligand (JackiePhos, 10 mol%) controlling the β-elimination pathway. We demonstrated that the glycosyl cross-coupling resulted in consistently high anomeric selectivities for both anomers with mono- and oligosaccharides, deoxysugars, saccharides with free hydroxyl groups, pyranose, and furanose substrates. The versatility of the glycosyl cross-coupling reaction was probed in the total synthesis of salmochelins (siderophores) and commercial anti-diabetic drugs (gliflozins). Combined experimental and computational studies revealed that the β-elimination pathway is suppressed for biphenyl-type ligands due to the shielding of Pd(II) by sterically demanding JackiePhos, whereas smaller ligands, which allow for the formation of a Pd-F complex, predominantly result in a glycal product. Similar steric effects account for the diminished rates of cross-couplings of 1,2-cis C1-stannanes with aryl halides. DFT calculations also revealed that the transmetalation occurs via a cyclic transition state with retention of configuration at the anomeric position. Taken together, facile access to both anomers of various glycoside nucleophiles, a broad reaction scope, and uniformly high transfer of anomeric configuration make the glycosyl cross-coupling reaction a practical tool for the synthesis of bioactive natural products, drug candidates, allowing for late-stage glycodiversification studies with small molecules and biologics.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Jacob Rodriguez
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Tianyi Yang
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Ilia Kevlishvili
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Eric Miller
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Duk Yi
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Sloane O'Neill
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Michael J Rourke
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
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4
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Probst N, Martin A, Désiré J, Mingot A, Marrot J, Blériot Y, Thibaudeau S. HF-Induced Intramolecular C-Arylation and C-Alkylation/Fluorination of 2-Aminoglycopyranoses. Org Lett 2017; 19:1040-1043. [DOI: 10.1021/acs.orglett.7b00003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Nicolas Probst
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Amélie Martin
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Jérôme Désiré
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Agnès Mingot
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Jérôme Marrot
- Institut Lavoisier
de Versailles, UMR CNRS 8180, 45 avenue
des Etats-Unis, Versailles78035 Cedex, France
| | - Yves Blériot
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Sébastien Thibaudeau
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
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