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Pote AR, Vannam R, Richard A, Gascón J, Peczuh MW. Formation of and Glycosylation with Per‐
O
‐Acetyl Septanosyl Halides: Rationalizing Complex Reactivity En Route to
p
‐Nitrophenyl Septanosides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800310] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Aditya R. Pote
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - Raghu Vannam
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - Alissa Richard
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - José Gascón
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - Mark W. Peczuh
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
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2
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Vannam R, Peczuh MW. A practical and scalable synthesis of carbohydrate based oxepines. Org Biomol Chem 2016; 14:3989-96. [PMID: 27056249 DOI: 10.1039/c6ob00262e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient, seven-step synthesis of carbohydrate based oxepines is reported using per-O-acetyl septanoses as key intermediates. The scope of the synthesis was evaluated by varying both the pyranose starting materials and protecting groups incorporated into the oxepine products. The practicality of the method make it amenable to scale up as demonstrated by the gram-scale synthesis of the d-glucose derived oxepine.
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Affiliation(s)
- Raghu Vannam
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U-3060, Storrs, CT 06269, USA.
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3
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Vannam R, Peczuh MW. How to Homologate Your Sugar: Synthetic Approaches to Septanosyl Containing Carbohydrates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Abstract
AbstractConformational analysis of unnatural seven-membered sugars, namely, septanoses and septanosides are discussed herein. The conformational properties of these sugars in the solid state, solution phase and computational methods are presented. The analyses reveal that conformations of septanosides are diverse and largely unpredictable, as compared furanosides and pyranosides.
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Affiliation(s)
- Supriya Dey
- 1Indian Institute of Science, Department of Organic Chemistry, Bangalore –560012, India
| | - N. Jayaraman
- 1Indian Institute of Science, Department of Organic Chemistry, Bangalore –560012, India
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Venukumar P, Sudharani C, Sridhar PR. A one-pot septanoside formation and glycosylation of acyclic dithioacetals derived from 1,2-cyclopropanated sugars. Chem Commun (Camb) 2014; 50:2218-21. [DOI: 10.1039/c3cc49116a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A one-pot septanoside formation and glycosylation of acyclic dithioacetals derived from 1,2-cyclopropanated sugars is reported.
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Schmidt B, Hauke S. Cross metathesis of allyl alcohols: how to suppress and how to promote double bond isomerization. Org Biomol Chem 2013; 11:4194-206. [PMID: 23676990 DOI: 10.1039/c3ob40167g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Under standard conditions the cross metathesis of allyl alcohols and methyl acrylate is accompanied by the formation of ketones, resulting from uncontrolled and undesired double bond isomerization. By conducting the CM in the presence of phenol, the catalyst loading and the reaction time required for quantiative conversion can be reduced, and isomerization can be suppressed. On the other hand, consecutive isomerization can be deliberately promoted by evaporating excess methyl acrylate after completing cross metathesis and by adding a base or silane as chemical triggers.
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Affiliation(s)
- Bernd Schmidt
- Universitaet Potsdam, Institut fuer Chemie, Organische Synthesechemie, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany.
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Sridhar PR, Venukumar P. A Ring Expansion–Glycosylation Strategy toward the Synthesis of Septano-oligosaccharides. Org Lett 2012; 14:5558-61. [DOI: 10.1021/ol302677z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
| | - Patteti Venukumar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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Jackowski O, Chrétien F, Didierjean C, Chapleur Y. Formation of septanoses from hexopyranosides via 5,6-exo-glycals. Carbohydr Res 2012; 356:93-103. [DOI: 10.1016/j.carres.2012.02.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Revised: 02/20/2012] [Accepted: 02/25/2012] [Indexed: 01/07/2023]
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9
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Saha J, Lorenc C, Surana B, Peczuh MW. Discovery of a Phosphine-Mediated Cycloisomerization of Alkynyl Hemiketals: Access to Spiroketals and Dihydropyrazoles via Tandem Reactions. J Org Chem 2012; 77:3846-58. [PMID: 22428530 DOI: 10.1021/jo3001854] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Jaideep Saha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
| | - Chris Lorenc
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
| | - Bikash Surana
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U3060, Storrs,
Connecticut 06269, United States
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Abstract
Seven-atom ring sugars, called septanoses, are increasingly the focus of scientific inquiries because of their potential biological activities. This article details the synthesis, conformational analysis, and protein-binding properties of septanose carbohydrates. A distinction is drawn between septanoses that are substituted in the 6-position of the ring and those that are not. When a C-6 substituent is absent, the structure is essentially that of an aldohexose in its septanose, rather than furanose or pyranose, ring form; they may play as-of-yet unexplored roles in glycobiology. Septanoses having a hydroxymethyl group at C-6, on the other hand, are ring-expanded analogues of pyranoses. Syntheses have moved beyond the preparation of seven-membered ring monosaccharides to the development of septanosyl donors. These donors have been used in the synthesis of novel di- and trisaccharides that contain septanoses as well as a variety of glycoconjugates. Low-energy conformations adopted by septanoses have been organized based on ring substitution and stereochemistry. Instances where septanoses have been demonstrated to bind to natural proteins are presented and analyzed. The major conclusion drawn in the chapter is that advances in the synthesis of septanose carbohydrates now enable a detailed investigation of their activity in a number of biological contexts.
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Saha J, Peczuh MW. Expanding the Scope of Aminosugars: Synthesis of 2‐Amino Septanosyl Glycoconjugates Using Septanosyl Fluoride Donors. Chemistry 2011; 17:7357-65. [DOI: 10.1002/chem.201003721] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/21/2011] [Indexed: 01/25/2023]
Affiliation(s)
- Jaideep Saha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U‐3060, Storrs, CT 06269 (USA), Fax: (+1) 860‐486‐2981
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U‐3060, Storrs, CT 06269 (USA), Fax: (+1) 860‐486‐2981
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Castro S, Johnson CS, Surana B, Peczuh MW. An oxepinone route to carbohydrate based oxepines. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Affiliation(s)
- Jaideep Saha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U-3060, Storrs, Connecticut 06269
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road U-3060, Storrs, Connecticut 06269
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Jadhav VH, Bande OP, Pinjari RV, Gejji SP, Puranik VG, Dhavale DD. Synthesis and Conformational Study of Chiral Oxepines: The Baylis−Hillman Reaction and RCM Approach with Sugar Aldehyde. J Org Chem 2009; 74:6486-94. [DOI: 10.1021/jo900660q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | | | | | - Vedavati G. Puranik
- Center for Materials Characterization, National Chemical Laboratory, Pune-411 008, India
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Boone MA, McDonald FE, Lichter J, Lutz S, Cao R, Hardcastle KI. 1,5-α-d-Mannoseptanosides, Ring-Size Isomers That Are Impervious to α-Mannosidase-Catalyzed Hydrolysis. Org Lett 2009; 11:851-4. [DOI: 10.1021/ol8028065] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew A. Boone
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | | | - Joseph Lichter
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Stefan Lutz
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Rui Cao
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
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Markad SD, Xia S, Snyder NL, Surana B, Morton MD, Hadad CM, Peczuh MW. Stereoselectivity in the Epoxidation of Carbohydrate-Based Oxepines. J Org Chem 2008; 73:6341-54. [DOI: 10.1021/jo800979a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shankar D. Markad
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Shijing Xia
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Nicole L. Snyder
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Bikash Surana
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Martha D. Morton
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Christopher M. Hadad
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Mark W. Peczuh
- Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, and Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
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Mao S, Probst D, Werner S, Chen J, Xie X, Brummond KM. Diverging Rh(I)-catalyzed carbocylization strategy to prepare a library of unique cyclic ethers. ACTA ACUST UNITED AC 2008; 10:235-46. [PMID: 18271514 DOI: 10.1021/cc7001843] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A library of 90 carboxamide-containing oxepines and pyrans was synthesized. A dual-branching strategy was used where a common intermediate, an allenyl-hydroxy ester, was either allylated or propargylated then subjected to rhodium(I)-catalyzed carbocyclization reaction conditions to afford an oxepine- or triene-containing pyran, respectively. The oxepines were selectively reduced to afford two functionally unique scaffolds using complementary hydrogenation conditions. Diversification of the oxepines and pyrans involved conversion of the methyl carboxylate group to a carboxamide via either a microwave-assisted amidation using polymer-bound carbodiimide (DCC) and 1-hydroxybenzotriazole (HOBt) or a NaCN-catalyzed aminolysis. The scope of a rarely used carbonyl-yne reaction was expanded to the preparation of 10 new allenyl-hydroxy esters using microwave irradiation. Finally, a cell-based diversity analysis using BCUT (Burden (B) CAS (C) Pearlman at the University of Texas (UT)) metrics calculations and two-dimensional fingerprint similarity approaches shows that when compared to the 100,000 Pittsburgh Molecular Library Screening Center (PMLSC) compound database and PubChem the new compound library occupies a unique chemical space.
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Affiliation(s)
- Shuli Mao
- University of Pittsburgh Center for Chemical Methodologies & Library Development and Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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DeMatteo MP, Mei S, Fenton R, Morton M, Baldisseri DM, Hadad CM, Peczuh MW. Conformational analysis of methyl 5-O-methyl septanosides: effect of glycosylation on conformer populations. Carbohydr Res 2006; 341:2927-45. [PMID: 17056019 DOI: 10.1016/j.carres.2006.09.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Revised: 09/15/2006] [Accepted: 09/28/2006] [Indexed: 11/26/2022]
Abstract
Methyl 5-O-methyl-alpha-d-glycero-d-idoseptanoside (3) and methyl 5-O-methyl-beta-d-glycero-d-guloseptanoside (4) were investigated as (1-->5)-linked di-/oligoseptanoside mimetics. Here we report the synthesis of 3 and 4 and describe their preferred solution conformations through a combination of ab initio/DFT calculations and (1)H (3)J(H,H) NMR coupling constant analysis. The conformations of 3 and 4 observed in this study are discussed in comparison to those of the parent (C5 hydroxy) compounds 1 and 2. The results indicate that methyl 5-O-methyl-alpha-septanoside 3 is relatively rigid and adopts the same (3,4)TC(5,6) conformation as 1. Methyl 5-O-methyl-beta-septanoside 4 is somewhat less rigid than its parent septanoside (2). In addition to the (6,O)TC(4,5) conformation adopted by 2, beta-septanoside 4 also populates the adjacent (3,4)TC(5,6) conformation. Glycosylation at C5 on beta-septanoside 4 therefore increases its overall flexibility and allows access to alternative ring conformations.
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Affiliation(s)
- Matthew P DeMatteo
- Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA
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