1
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Rasool JU, Kumar A, Ali A, Ahmed QN. Triethylamine-methanol mediated selective removal of oxophenylacetyl ester in saccharides. Org Biomol Chem 2021; 19:338-347. [PMID: 33300928 DOI: 10.1039/d0ob02192j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly selective, mild, and efficient method for the cleavage of oxophenylacetyl ester protected saccharides was developed using triethylamine in methanol at room temperature. The reagent proved successful against different labile groups like acetal, ketal, and PMB and also generated good yields of the desired saccharides bearing lipid esters. Further, we also observed DBU in methanol as an alternative reagent for the deprotection of acetyl, benzoyl, and oxophenylacetyl ester groups.
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Affiliation(s)
- Javeed Ur Rasool
- Medicinal Chemistry Division, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001 India and Academy of scientific and innovative research, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001, India.
| | - Atul Kumar
- Medicinal Chemistry Division, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001 India and Academy of scientific and innovative research, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001, India. and Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District Samba, Jammu-180001, India
| | - Asif Ali
- CSIR-Traditional Knowledge Digital Library (TKDL), 14-Satsang Vihar, Vigyan Suchna Bhawan, New Delhi-110067, India
| | - Qazi Naveed Ahmed
- Medicinal Chemistry Division, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001 India and Academy of scientific and innovative research, Council of Scientific and Industrial Research-Indian Institute of Integrative Medicine (CSIR-IIIM), Jammu-180001, India.
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2
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dos Santos T, Grundke C, Lucas T, Großmann L, Clososki GC, Opatz T. Glucose as an Eco‐Friendly Reductant in a One‐Pot Synthesis of 2,3‐Dihydroquinazolin‐4(1
H
)‐ones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Thiago dos Santos
- Department of Chemistry Johannes Gutenberg University 55128 Mainz Germany
- Department of Biomolecular Sciences Faculty of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Avenida do Café s/n 14040‐900 Ribeirão Preto ‐ SP Brazil
| | - Caroline Grundke
- Department of Chemistry Johannes Gutenberg University 55128 Mainz Germany
| | - Tobias Lucas
- Department of Chemistry Johannes Gutenberg University 55128 Mainz Germany
| | - Luca Großmann
- Department of Chemistry Johannes Gutenberg University 55128 Mainz Germany
| | - Giuliano Cesar Clososki
- Department of Biomolecular Sciences Faculty of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Avenida do Café s/n 14040‐900 Ribeirão Preto ‐ SP Brazil
| | - Till Opatz
- Department of Chemistry Johannes Gutenberg University 55128 Mainz Germany
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3
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Kumar A, Gannedi V, Rather SA, Vishwakarma RA, Ahmed QN. Introducing Oxo-Phenylacetyl (OPAc) as a Protecting Group for Carbohydrates. J Org Chem 2019; 84:4131-4148. [PMID: 30888192 DOI: 10.1021/acs.joc.9b00126] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A series of oxo-phenylacetyl (OPAc)-protected saccharides, with divergent base sensitivity profiles against benzoyl (Bz) and acetyl (Ac) were synthesized, and KHSO5/AcCl in methanol was identified as an easy, mild, selective, and efficient deprotecting reagent for their removal in the perspective of carbohydrate synthesis. Timely monitoring of AcCl reagent was supportive in both sequential and simultaneous deprotecting of OPAc, Bz, and Ac. The salient feature of our method is the orthogonal stability against different groups, its ease to generate different valuable acceptors using designed monosaccharides, and use of OPAc as a glycosyl donar.
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Affiliation(s)
- Atul Kumar
- Medicinal Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
| | - Veeranjaneyulu Gannedi
- Medicinal Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
| | - Suhail A Rather
- Medicinal Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
| | - Ram A Vishwakarma
- Medicinal Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India
| | - Qazi Naveed Ahmed
- Medicinal Chemistry Division , Indian Institute of Integrative Medicine (IIIM) , Jammu 180001 , India.,Academy of Scientific and Innovative Research (AcSIR-IIIM) , Jammu 180001 , India
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4
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One pot oxidative dehydration - oxidation of polyhydroxyhexanal oxime to polyhydroxy oxohexanenitrile: A versatile methodology for the facile access of azasugar alkaloids. Carbohydr Res 2016; 435:1-6. [DOI: 10.1016/j.carres.2016.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 09/05/2016] [Accepted: 09/06/2016] [Indexed: 12/21/2022]
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5
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John F, Wittmann V. Orthogonally Protected Furanoid Sugar Diamino Acids for Solid-Phase Synthesis of Oligosaccharide Mimetics. J Org Chem 2015; 80:7477-85. [DOI: 10.1021/acs.joc.5b01049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Franklin John
- Fachbereich
Chemie and Konstanz Research School Chemical Biology (KoRS-CB), Universität Konstanz, 78457 Konstanz, Germany
- Department
of Chemistry, Sacred Heart College (M. G. University), Kochi 682013, India
| | - Valentin Wittmann
- Fachbereich
Chemie and Konstanz Research School Chemical Biology (KoRS-CB), Universität Konstanz, 78457 Konstanz, Germany
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6
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Rescifina A, Zagni C, Varrica MG, Pistarà V, Corsaro A. Recent advances in small organic molecules as DNA intercalating agents: synthesis, activity, and modeling. Eur J Med Chem 2014; 74:95-115. [PMID: 24448420 DOI: 10.1016/j.ejmech.2013.11.029] [Citation(s) in RCA: 176] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/26/2013] [Accepted: 11/28/2013] [Indexed: 11/28/2022]
Abstract
The interaction of small molecules with DNA plays an essential role in many biological processes. As DNA is often the target for majority of anticancer and antibiotic drugs, study about the interaction of drug and DNA has a key role in pharmacology. Moreover, understanding the interactions of small molecules with DNA is of prime significance in the rational design of more powerful and selective anticancer agents. Two of the most important and promising targets in cancer chemotherapy include DNA alkylating agents and DNA intercalators. For these last the DNA recognition is a critical step in their anti-tumor action and the intercalation is not only one kind of the interactions in DNA recognition but also a pivotal step of several clinically used anti-tumor drugs such as anthracyclines, acridines and anthraquinones. To push clinical cancer therapy, the discovery of new DNA intercalators has been considered a practical approach and a number of intercalators have been recently reported. The intercalative binding properties of such molecules can also be harnessed as diagnostic probes for DNA structure in addition to DNA-directed therapeutics. Moreover, the problem of intercalation site formation in the undistorted B-DNA of different length and sequence is matter of tremendous importance in molecular modeling studies and, nowadays, three models of DNA intercalation targets have been proposed that account for the binding features of intercalators. Finally, despite DNA being an important target for several drugs, most of the docking programs are validated only for proteins and their ligands. Therefore, a default protocol to identify DNA binding modes which uses a modified canonical DNA as receptor is needed.
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Affiliation(s)
- Antonio Rescifina
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy.
| | - Chiara Zagni
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Maria Giulia Varrica
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Venerando Pistarà
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Antonino Corsaro
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
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7
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Barron S, Murphy PV. Synthesis of iminosugar derivatives presenting naphthyl and alkyl amine interacting groups and binding to somatostatin receptors. MEDCHEMCOMM 2014. [DOI: 10.1039/c4md00074a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of 1-deoxynojirimycin (DNJ) derivatives, presenting a 2-naphthylmethyl and an alkyl amino side chain, from l-sorbose is described.
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Affiliation(s)
- Stephen Barron
- School of Chemistry and Chemical Biology
- University College Dublin
- Dublin 4
- Ireland
| | - Paul V. Murphy
- School of Chemistry
- National University of Ireland Galway
- Galway
- Ireland
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8
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Zhao J, Li W, Ma R, Chen S, Ren S, Jiang T. Design, synthesis and DNA interaction study of new potential DNA bis-intercalators based on glucuronic acid. Int J Mol Sci 2013; 14:16851-65. [PMID: 23955268 PMCID: PMC3759939 DOI: 10.3390/ijms140816851] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 06/30/2013] [Accepted: 07/07/2013] [Indexed: 11/18/2022] Open
Abstract
A series of novel potential DNA bis-intercalators were designed and synthesized, in which two glucuronic acids were linked by ethylenediamine, and the glucuronic acid was coupled with various chromophores, including quinoline, acridine, indole and purine, at the C-1 position. The preliminary binding properties of these compounds to calf thymus DNA (CT-DNA) have been investigated by UV-absorption and fluorescence spectroscopy. The results indicated that all the target compounds can interact with CT-DNA, and the acridine derivative, 3b, showed the highest key selection vector (KSV) value, which suggested that compound 3b binds most strongly to CT-DNA.
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Affiliation(s)
- Jiuyang Zhao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (J.Z.); (W.L.); (R.M.); (S.C.); (S.R.)
| | - Wei Li
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (J.Z.); (W.L.); (R.M.); (S.C.); (S.R.)
- School of Pharmacy, Jining Medical University, Rizhao 276826, China
| | - Rui Ma
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (J.Z.); (W.L.); (R.M.); (S.C.); (S.R.)
| | - Shaopeng Chen
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (J.Z.); (W.L.); (R.M.); (S.C.); (S.R.)
| | - Sumei Ren
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (J.Z.); (W.L.); (R.M.); (S.C.); (S.R.)
| | - Tao Jiang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Pharmacy, Ocean University of China, Qingdao 266003, China; E-Mails: (J.Z.); (W.L.); (R.M.); (S.C.); (S.R.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-532-8203-2712; Fax: +86-532-8203-3054
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9
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Nguyen SH, Trotta AH, Cao J, Straub TJ, Bennett CS. Direct O-glycosidation of resin bound thioglycosides. Org Biomol Chem 2012; 10:2373-6. [PMID: 22261792 DOI: 10.1039/c2ob06883d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The application of the safety-catch linker concept to solid-phase glycoconjugate synthesis is described. The process allows for direct conjugation of resin bound glycans to complex aglycones during cleavage. Large excesses of either coupling partner are not required, and even very hindered alcohols serve as acceptors in the reaction.
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Affiliation(s)
- Son Hong Nguyen
- Department of Chemistry, Tufts University, Medford, MA 02155, USA
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10
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Dobbelaar PH, Marzabadi CH. Povarov reactions of exo-glycals: preparation of C-linked, quinoline analogues. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Svejgaard L, Fuglsang H, Jensen PB, Kelly NM, Pedersen H, Andersen K, Ruhland T, Jensen KJ. Synthesis of Two d‐Glucosamine Derived 3,4‐Epoxides as Potential Scaffolds for Combinatorial Chemistry. J Carbohydr Chem 2011. [DOI: 10.1081/car-120021699] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Lars Svejgaard
- a Department of Chemistry , Technical University of Denmark , Building 201, Kemitorvet, DK‐2800 , Lyngby , Denmark
- e Analytical Chemistry , Novo Nordisk , Bagsværd , Denmark
| | - Henrik Fuglsang
- a Department of Chemistry , Technical University of Denmark , Building 201, Kemitorvet, DK‐2800 , Lyngby , Denmark
- f Combio , Valby , Denmark
| | - Peter B. Jensen
- a Department of Chemistry , Technical University of Denmark , Building 201, Kemitorvet, DK‐2800 , Lyngby , Denmark
| | - Nicholas M. Kelly
- a Department of Chemistry , Technical University of Denmark , Building 201, Kemitorvet, DK‐2800 , Lyngby , Denmark
- g ACADIA A/S , Glostrup , Denmark
| | - Henrik Pedersen
- b Department of Spectroscopy , Lundbeck A/S , Ottiliavej 9, DK‐2500 , Valby , Denmark
| | - Kim Andersen
- c Department of Combinatorial Chemistry , Lundbeck A/S , Ottiliavej 9, DK‐2500 , Valby , Denmark
| | - Thomas Ruhland
- c Department of Combinatorial Chemistry , Lundbeck A/S , Ottiliavej 9, DK‐2500 , Valby , Denmark
| | - Knud J. Jensen
- d Department of Chemistry , Royal Veterinary and Agricultural University , Thorvaldsensvej 40, DK‐1871 , Frederiksberg , Denmark
- h Department of Chemistry , KVL , Thorvaldsensvej 40, DK‐1871 , Frederiksberg , Denmark
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12
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Chen S, Zhang X, Wang J, Wan S, Geng M, Jiang T. Design and synthesis of a series of novel bisquinazoline glycosides as epidermal growth factor receptor inhibitors. Chem Biol Drug Des 2011; 78:1006-13. [PMID: 21824331 DOI: 10.1111/j.1747-0285.2011.01209.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new series of potential epidermal growth factor receptor inhibitors possessing bisquinazoline and saccharide moieties were designed and synthesized. The biological results demonstrated that the synthetic derivatives significantly inhibited epidermal growth factor receptor enzymatic activity in vitro. Of them, compound 14b showed the highest inhibitory rate toward epidermal growth factor receptor protein tyrosine kinase (81.36%) at a concentration of 1 μM. Further molecular simulation predicted that 14b offered its saccharide moieties hydrogen bonding to ATP-binding pocket.
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13
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14
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Zhang Z, Ren S, Wan S, Li W, Jiang T. Synthesis of D-Glucosamine-Modified Benzo[d][1,2]selenazol-3-(2H)-one Derivatives. SYNTHETIC COMMUN 2010. [DOI: 10.1080/00397910903434562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Zhongwei Zhang
- a School of Medicine and Pharmacy, Key Laboratory of Marine Drugs, Ministry of Education, Ocean University of China , Qingdao, China
| | - Sumei Ren
- a School of Medicine and Pharmacy, Key Laboratory of Marine Drugs, Ministry of Education, Ocean University of China , Qingdao, China
| | - Shengbiao Wan
- a School of Medicine and Pharmacy, Key Laboratory of Marine Drugs, Ministry of Education, Ocean University of China , Qingdao, China
| | - Wei Li
- a School of Medicine and Pharmacy, Key Laboratory of Marine Drugs, Ministry of Education, Ocean University of China , Qingdao, China
| | - Tao Jiang
- a School of Medicine and Pharmacy, Key Laboratory of Marine Drugs, Ministry of Education, Ocean University of China , Qingdao, China
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15
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Liao Y, Li ZM, Wong HNC. A concise strategy for polymer-supported regio-oriented introduction of various building blocks onto glucopyranoside scaffold. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20010191120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Gómez AM, Pedregosa A, Uriel C, Valverde S, López JC. 1-exo-Alkylidene-2,3-anhydrofuranoses: Valuable Synthons in the Preparation of Furanose-Based Templates. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000612] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Daragics K, Fügedi P. (2-Nitrophenyl)acetyl: a new, selectively removable hydroxyl protecting group. Org Lett 2010; 12:2076-9. [PMID: 20361745 DOI: 10.1021/ol100562f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The utility of the (2-nitrophenyl)acetyl (NPAc) group for the protection of hydroxyl functions is reported. (2-Nitrophenyl)acetates are readily prepared starting from the commercially available, inexpensive (2-nitrophenyl)acetic acid, and these esters are stable under a series of common carbohydrate transformations. The NPAc group can be removed selectively using Zn and NH(4)Cl without affecting a series of common protecting groups. This new protecting group is orthogonal with the commonly used tert-butyldimethylsilyl, levulinoyl, 9-fluorenylmethoxycarbonyl, naphthylmethyl, and p-methoxybenzyl groups.
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Affiliation(s)
- Katalin Daragics
- Department of Carbohydrate Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025 Budapest, Hungary
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18
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Tanaka H, Yamaguchi S, Yoshizawa A, Takagi M, Shin-ya K, Takahashi T. Combinatorial Synthesis of Deoxyhexasaccharides Related to the Landomycin A Sugar Moiety, Based on an Orthogonal Deprotection Strategy. Chem Asian J 2010; 5:1407-24. [DOI: 10.1002/asia.200900640] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Le Thanh G, Abbenante G, Adamson G, Becker B, Clark C, Condie G, Falzun T, Grathwohl M, Gupta P, Hanson M, Huynh N, Katavic P, Kuipers K, Lam A, Liu L, Mann M, Mason J, McKeveney D, Muldoon C, Pearson A, Rajaratnam P, Ryan S, Tometzki G, Verquin G, Waanders J, West M, Wilcox N, Wimmer N, Yau A, Zuegg J, Meutermans W. A Versatile Synthetic Approach toward Diversity Libraries using Monosaccharide Scaffolds. J Org Chem 2009; 75:197-203. [DOI: 10.1021/jo9021919] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Giang Le Thanh
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | | | - George Adamson
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Bernd Becker
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Chris Clark
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Glenn Condie
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Tania Falzun
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | | | - Praveer Gupta
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Michael Hanson
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Ngoc Huynh
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Peter Katavic
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Krystle Kuipers
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Ann Lam
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Ligong Liu
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Maretta Mann
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Jeff Mason
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | | | - Craig Muldoon
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Andrew Pearson
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | | | - Sarah Ryan
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Gerry Tometzki
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | | | | | - Michael West
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Neil Wilcox
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Norbert Wimmer
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Annika Yau
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Johannes Zuegg
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
| | - Wim Meutermans
- Alchemia Ltd., Eight Mile Plains, Queensland 4113, Australia
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20
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Li W, Zhang ZW, Wang SX, Ren SM, Jiang T. Synthesis and Analysis of Potential DNA Intercalators Containing Quinoline-Glucose Hybrids. Chem Biol Drug Des 2009; 74:80-6. [DOI: 10.1111/j.1747-0285.2009.00831.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Pandey J, Sharma A, Tiwari VK, Dube D, Ramachandran R, Chaturvedi V, Sinha SK, Mishra NN, Shukla PK, Tripathi RP. Solution-Phase Synthesis of a Library of Carbapeptide Analogues Based on Glycosylamino Acid Scaffolds and Their In Silico Screening and Antimicrobial Evaluation. ACTA ACUST UNITED AC 2009; 11:422-7. [DOI: 10.1021/cc800206m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jyoti Pandey
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Anindra Sharma
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Vinod K. Tiwari
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Divya Dube
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Ravishankar Ramachandran
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Vinita Chaturvedi
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Sudhir K. Sinha
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Nripendra N. Mishra
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Praveen K. Shukla
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
| | - Rama P. Tripathi
- Divisions of Medicinal and Process Chemistry, Molecular and Structural Biology, Drug Target Discovery and Development, and Fermentation Technology, Central Drug Research Institute, Lucknow-226001, India
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22
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Singh L, Lam A, Premraj R, Seifert J. Synthesis of a metabolite of an anti-angiogenic lead candidate based on a d-glucosamine motif. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Chagnault V, Lalot J, Murphy P. Synthesis of Somatostatin Mimetics Based on 1‐Deoxynojirimycin. ChemMedChem 2008; 3:1071-6. [DOI: 10.1002/cmdc.200800038] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Liu R, Chanthamontri C, Han H, Hernández-Torres JM, Wood KV, McLuckey SA, Wei A. Solid-phase synthesis of alpha-glucosamine sulfoforms with fragmentation analysis by tandem mass spectrometry. J Org Chem 2008; 73:6059-72. [PMID: 18610984 DOI: 10.1021/jo800713m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sulfated epitopes of alpha-glucosamine (GlcN sulfoforms) were prepared by solid-phase synthesis as models of internal glucosamines within heparan sulfate. An orthogonally protected 2'-hydroxyethyl GlcN derivative was immobilized on a trityl resin support and subjected to regioselective deprotection and sulfonation conditions, which were optimized with the aid of on-resin infrared or Raman analysis. The sulfoforms were cleaved from the resin under mild Lewis acid conditions without affecting the O- or N-sulfate groups and purified by reversed-phase high-performance liquid chromatography (HPLC). The alpha-GlcN sulfoforms and their 4- O-benzyl ethers were examined by electrospray ionization tandem mass spectrometry (ESI-MS/MS), with product ion spectra produced by collision-induced dissociation (CID). ESI-MS/MS revealed significant differences in parent ion stabilities and fragmentation rates as a function of sulfate position. Ion fragmentation by CID resulted in characteristic mass losses with strong correlation to the positions of both free hydroxyl groups and sulfate ions. Most of these fragmentation patterns are consonant with elimination pathways, and suggest possible strategies for elucidating the structures of glucosamine-derived sulfoforms with identical m/ z ratios. In particular, fragmentation analysis can easily distinguish GlcN sulfoforms bearing the relatively rare 3- O-sulfate from isomers with the more common 6- O-sulfate.
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Affiliation(s)
- Runhui Liu
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, USA
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25
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Reddy LVR, Swamy GN, Shaw AK. A versatile route for the stereoselective synthesis of oxybiotin. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.05.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Abstract
Drug discovery has long suffered from the difficulty of having to place pharmacophoric groups in just the right spatial arrangement to elicit the desired biological response. Although some molecule classes have been discovered that seem to be privileged structures for at least some drug-receptor interactions, there remains the challenge to design and synthesize molecules with high specific affinity to pharmacologically important targets. With their high density of stereochemical information and their relative rigidity, carbohydrates provide excellent platforms upon which to display a number of substituents in a sterically defined way, hence offering the opportunity to harness their unique features for the drug-discovery process. This review highlights the progress that has been made in the development of carbohydrate scaffolds for drug discovery.
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Affiliation(s)
- Wim Meutermans
- Alchemia Ltd., PO Box 6242, Upper Mt Gravatt, Qld 4122, Australia
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29
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Gea A, Farcy N, Roqué i Rossell N, Martins JC, De Clercq PJ, Madder A. Solid-Supported Synthesis of Highly Functionalized Tripodal Peptides with Flexible but Preorganized Geometry: Towards Potential Serine Protease Mimics. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600145] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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30
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Peri F, Nicotra F, Leslie CP, Micheli F, Seneci P, Marchioro C. d‐Glucose as a Regioselectively Addressable Scaffold for Combinatorial Chemistry on Solid Phase. J Carbohydr Chem 2006. [DOI: 10.1081/car-120019014] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Francesco Peri
- a Department of Biotechnology and Biosciences , University of Milano–Bicocca , Piazza Della Scienza, 2, I‐20126, Italy
| | - Francesco Nicotra
- a Department of Biotechnology and Biosciences , University of Milano–Bicocca , Piazza Della Scienza, 2, I‐20126, Italy
| | - Colin P. Leslie
- b Medicines Research Centre , GlaxoSmithKline SpA , Via Fleming 4, Verona, 37135, Italy
| | - Fabrizio Micheli
- b Medicines Research Centre , GlaxoSmithKline SpA , Via Fleming 4, Verona, 37135, Italy
| | - Pierfausto Seneci
- b Medicines Research Centre , GlaxoSmithKline SpA , Via Fleming 4, Verona, 37135, Italy
| | - Carla Marchioro
- b Medicines Research Centre , GlaxoSmithKline SpA , Via Fleming 4, Verona, 37135, Italy
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31
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Ingrid Velter, Barbara La Ferla, Francesco Nicotra. Carbohydrate‐Based Molecular Scaffolding. J Carbohydr Chem 2006. [DOI: 10.1080/07328300600733020] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ingrid Velter
- a Dipartimento di Biotecnologie e Bioscienze , Università degli Studi di Milano‐Bicocca , Milano, Italy
| | - Barbara La Ferla
- a Dipartimento di Biotecnologie e Bioscienze , Università degli Studi di Milano‐Bicocca , Milano, Italy
| | - Francesco Nicotra
- a Dipartimento di Biotecnologie e Bioscienze , Università degli Studi di Milano‐Bicocca , Milano, Italy
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32
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Compostella F, Ronchi S, Panza L, Mariotti S, Mori L, De Libero G, Ronchetti F. Synthesis of Sulfated Galactocerebrosides from an Orthogonal β-D-Galactosylceramide Scaffold for the Study of CD1–Antigen Interactions. Chemistry 2006; 12:5587-95. [PMID: 16637081 DOI: 10.1002/chem.200501586] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CD1a protein binds sulfatide (3-O-sulfo-beta-D-galactosylceramide) to form an antigen complex that interacts with T cell receptors and activates T cells. To assess the role of the position of the sulfate in T cell activation, the synthesis of three beta-D-galactosylceramides, variously bearing a sulfate at position 2, 4, or 6 of galactose, has been planned and carried out. The compounds were synthesized by an orthogonal sulfation strategy from a common beta-D-galactosylceramide scaffold, which was in turn obtained through an efficient glycosylation reaction between a fully orthogonally protected galactosyl imidate and 3-O-benzoylazidosphingosine. Immunological evaluation of the three sulfated compounds in CD1a-mediated T cell activation, in comparison with natural sulfatide, provided evidence of the influence of the sulfate position in the recognition event between the antigen, the CD1 protein and the T cell receptor.
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Affiliation(s)
- Federica Compostella
- Dipartimento di Chimica, Biochimica e Biotecnologie per la Medicina, Università di Milano, Via Saldini 50, 20133-Milan, Italy.
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33
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Schweizer F, Hindsgaul O. Synthesis of a galacto-configured C-ketoside-based γ-sugar-amino acid and its use in peptide coupling reactions. Carbohydr Res 2006; 341:1730-6. [PMID: 16616901 DOI: 10.1016/j.carres.2006.03.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2006] [Revised: 02/28/2006] [Accepted: 03/07/2006] [Indexed: 11/17/2022]
Abstract
Gamma-sugar-amino acid analogues in the form of C-ketosides can be prepared in 5-6 steps starting from D-galactono-1,5-lactone. The key step in the synthesis is the trimethylsilyl trifluoromethanesulfonate (TMSOTf) promoted C-glycosylation of 2-deoxy-3-ulopyranosonates with trimethylsilyl cyanide. Hydrogenation of the resulting beta-cyano esters provides C-ketoside-based gamma-sugar-amino acids that serve as building blocks for the synthesis of unnatural neoglycopeptides.
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Affiliation(s)
- Frank Schweizer
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2.
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34
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Rawe SL, Doyle D, Zaric V, Rozas I, McMahon K, Tosin M, Bunz HM, Murphy EP, O' Boyle KM, Murphy PV. N-Glycosyl-thiophene-2-carboxamides: synthesis, structure and effects on the growth of diverse cell types. Carbohydr Res 2006; 341:1370-90. [PMID: 16716276 DOI: 10.1016/j.carres.2006.04.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2006] [Revised: 04/07/2006] [Accepted: 04/14/2006] [Indexed: 10/24/2022]
Abstract
A range of N-glycosyl-thiophene-2-carboxamides, including a 6H-thieno[2,3-c]pyridin-7-one and a bivalent compound, have been synthesised and assayed for their effects on DNA synthesis in bovine aortic endothelial cells or on the growth of synoviocytes. Per-O-acetylated analogues of the glycoconjugates were significantly more effective inhibitors when compared to their corresponding non-acetylated analogues, indicating that the lower potency observed for hydroxylated derivatives is due to less efficient transport of these compounds across the cell membrane. Thiophene-2-carboxamide was inactive as an inhibitor of bFGF induced proliferation, confirming the requirement of the carbohydrate residue for the observed biological properties. Glucose, mannose, galactose and 2-amino-2-deoxy-glucose analogues were active as were a variety of substituted thiophene derivatives; the 6H-thieno[2,3-c]pyridin-7-one conjugate was inactive. Conformational analysis of the title compounds was investigated. X-ray crystal structural analysis of four N-glucosyl-thiophene-2-carboxamides showed that the pyranose rings adopted the expected 4C1 conformations and that Z-anti structures were predominant (H1-C1-N-H anomeric torsion angle varied from -168.2 degrees to -175.0 degrees ) and that the carbonyl oxygen and sulfur of the thiophene adopted an s-cis conformation in three of the isomers. In a crystal structure of a 3-alkynyl derivative, the hydrogen atom of the NH group was directed toward the acetylene group. The distance between the hydrogen atom and acetylene carbons and angles between nitrogen, hydrogen and carbon atoms were consistent with hydrogen bonding and this was supported by IR and NMR spectroscopic studies. The geometries of thiophene-2-carboxamides were explored by density functional theory (DFT) and Møller-Plesset (MP2) calculations and the s-cis conformer of thiophene-2-carboxamide was found to be more stable than its s-trans isomer by 0.83 kcal mol(-1). The s-cis conformer of 3-ethynyl-thiophene-2-carboxamide was 5.32 kcal mol(-1) more stable than the s-trans isomer. The larger stabilisation for the s-cis conformer in the 3-alkynyl derivatives is explained to be due to a moderate hydrogen bonding interaction between the alkyne and NH group.
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Affiliation(s)
- Sarah L Rawe
- Centre for Synthesis and Chemical Biology and UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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35
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Cervi G, Peri F, Battistini C, Gennari C, Nicotra F. Bicyclic carbohydrate-derived scaffolds for combinatorial libraries. Bioorg Med Chem 2006; 14:3349-67. [PMID: 16439139 DOI: 10.1016/j.bmc.2005.12.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Revised: 12/22/2005] [Accepted: 12/23/2005] [Indexed: 11/17/2022]
Abstract
A bicyclic scaffold derived from the natural monosaccharide d-glucose, and possessing several diversity sites, was linked to various resins through the primary (C-6) hydroxyl and decorated on the solid phase: the hydroxyl group at C-4 was functionalized as ester, ether, and carbamate, the amino group in the second cycle (C-3' position) was functionalized as amide, sulfonamide, and ureido- and thioureido-derivatives. The compounds synthesized on the solid phase were tested for their antiproliferative activity on tumor cell lines.
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Affiliation(s)
- Giovanni Cervi
- Dipartimento di Biotecnologie e Bioscienze, Università degli Studi di Milano-Bicocca, Piazza della Scienza 2, I-20126 Milano, Italy
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36
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McAllister LA, McCormick RA, Procter DJ. Sulfide- and selenide-based linkers in phase tag-assisted synthesis. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.056] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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Gao Y, Eguchi A, Kakehi K, Lee YC. Synthesis and molecular recognition of carbohydrate-centered multivalent glycoclusters by a plant lectin RCA120. Bioorg Med Chem 2005; 13:6151-7. [PMID: 16054373 DOI: 10.1016/j.bmc.2005.06.036] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Revised: 06/13/2005] [Accepted: 06/14/2005] [Indexed: 10/25/2022]
Abstract
Water soluble and lectin-recognizable carbohydrate-centered glycoclusters were prepared efficiently by the Huisgen 1,3-cycloaddition reaction of methyl-2,3,4,6-tetra-O-propargyl beta-D-galactopyranoside with 2-azidoethyl glycosides of lactose and N-acetyllactosamine. Their binding by a plant lectin RCA120 was examined by capillary affinity electrophoresis using fluorescence-labeled asialoglycans from human alpha1-acid glycoprotein. The glycoclusters showed 400-fold stronger inhibitory effect than free lactose, manifesting strong multivalency effect.
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Affiliation(s)
- Yongjun Gao
- Department of Biology, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
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38
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Agoston K, Geyer A. Regioselective Conversion of the Secondary Hydroxyl Groups ofD-Glucuronic Acid without the Requirement ofO-Protecting Groups. Chemistry 2005; 11:6407-13. [PMID: 16094680 DOI: 10.1002/chem.200500515] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Trifluoromethanesulfonic acid anhydride (triflic acid anhydride) transforms the bicyclic thiazolidinlactam 1 a into the crystalline elimination product 2, in which all four secondary hydroxyl groups of 1 a are differently functionalized. Compound 2 can then add nucleophiles with high chemo- and stereoselectivity. Altogether, the four secondary hydroxyl groups of D-glucuronic acid are selectively transformed without the need for any O-protecting groups. Minimizing the number of O-protecting groups is a prerequisite for the use of sugar scaffolds in molecular libraries. The hapalosin analogues 15, 16, 19, and 22 outline the strategy towards O-diversified glucose derivatives.
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Affiliation(s)
- Károly Agoston
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Germany
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39
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Gouin SG, Murphy PV. Synthesis of Somatostatin Mimetics Based on the 1-Deoxymannojirimycin Scaffold. J Org Chem 2005; 70:8527-32. [PMID: 16209603 DOI: 10.1021/jo051454n] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A novel synthesis of somatostatin mimetics based on the 1-deoxymannojirimycin (DMJ) scaffold has been developed. This involved development of a route suitable for the strategic grafting of pharmacophoric tryptophan and lysine side chains to the nitrogen atom of the piperidine ring and to the primary hydroxyl group of DMJ, respectively. The novel peptidomimetics were found to bind with higher affinity to sst4 receptors than to sst5 receptors.
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Affiliation(s)
- Sebastien G Gouin
- Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
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40
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Chiara JL, García A, Cristóbal-Lumbroso G. Ketone-imide versus ketone-oxime reductive cross-coupling promoted by samarium diiodide: new mechanistic insight gained from a failed aminocyclopentitol synthesis. J Org Chem 2005; 70:4142-51. [PMID: 15876107 DOI: 10.1021/jo050185y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] The intramolecular 1,6-ketone/imide reductive coupling promoted by samarium diiodide competes favorably with an alternative 1,5-ketone/oxime ether coupling in a keto-oxime substrate derived from D-glucosamine N-protected with a phthalimido group. This pinacol coupling reaction affords new homochiral alpha-hydroxylactam scaffolds that could be useful in diversity-oriented synthesis. A mechanistic proposal for this reaction that explains the experimental results is supported by DFT quantum-mechanical calculations on model compounds.
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Affiliation(s)
- Jose Luis Chiara
- Instituto de Química Orgánica General, CSIC, Juan de la Cierva 3, E-28006 Madrid, Spain.
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41
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Velasco-Torrijos T, Murphy PV. Metathesis of structurally preorganized bivalent carbohydrates. Synthesis of macrocyclic and oligomeric scaffolds. Org Lett 2005; 6:3961-4. [PMID: 15496074 DOI: 10.1021/ol0484254] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Bivalent carbohydrate substrates for metathesis were synthesized from glucuronic acid and phenylene-1,4-diamine. The substrate secondary structure depends on whether secondary or tertiary amides are present, and this influences the course of the metathesis reaction leading to novel multivalent scaffolding. Molecular modeling suggests that a very rigid macrocyclic scaffold has potential for the development of alpha-helix peptidomimetics.
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Affiliation(s)
- Trinidad Velasco-Torrijos
- Centre for Synthesis and Chemical Biology, Chemistry Department, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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42
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Moon B, Han S, Kim D. Efficient Synthesis of Highly Functionalized Cyclic Aminimides. Org Lett 2005; 7:3359-61. [PMID: 16018660 DOI: 10.1021/ol051270v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text]. Simple condensation reactions of various alpha,beta-epoxy or alpha,beta-aziridinyl methyl esters with 1,1-dialkyl hydrazines provided cyclic aminimides (1,1-dialkyl-3-oxopyrazolidines) with a heteroatom substituent at the 4-position in good yields. The reaction proceeds smoothly, without any coreagent, providing the product as an easily isolable precipitate. The reaction is expected to be a good candidate for combinatorial synthesis of a highly functionalized five-membered ring scaffold. The scope and limitations of this reaction were investigated by varying the substituents R(1)-R(5).
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Affiliation(s)
- Bongjin Moon
- Department of Chemistry, Sogang University, Seoul, Korea.
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43
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Tosin M, Murphy PV. Synthesis of Structurally Defined Scaffolds for Bivalent Ligand Display Based on Glucuronic Acid Anilides. The Degree of Tertiary Amide Isomerism and Folding Depends on the Configuration of a Glycosyl Azide. J Org Chem 2005; 70:4107-17. [PMID: 15876103 DOI: 10.1021/jo050200z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structures: see text] Syntheses and structural analyses of bivalent carbohydrates based on anilides of glucuronic acid are described. Secondary anilides predominantly adopted the Z-anti structure; there is also evidence for population of the Z-syn isomer. Bivalent tertiary anilides displayed two signal sets in their NMR spectra, consistent with the presence of (i) a major isomer where both amides have E configurations (EE) and (ii) a minor isomer where one amide is E and the other Z (EZ). Qualitative NOE/ROE spectroscopic studies in solution support the proposal that the anti conformation is preferred for E amides. The crystal structure of one bivalent tertiary anilide showed E-anti and E-syn structural isomers; intramolecular carbohydrate-carbohydrate stacking was observed and mediated by carbonyl-pyranose, azide-azide, and pyranose-aromatic interactions. The EE to EZ isomer ratio, or the degree of folding, for tertiary amides, was greatest for a bivalent compound containing two alpha-glycosyl azide groups; this was enhanced in water, suggesting that hydrophobic interactions are partially but not wholly responsible. Computational methods predicted azide-aromatic (N...H-C interaction) and azide-azide interactions for folded isomers. The close contact of the azide and aromatic protons (N...H-C interaction) was observed upon examination of the close packing in the crystal structure of a related monomer. It is proposed that the alpha-azide group is more optimally aligned, compared to the beta-azide, to facilitate interaction and minimize the surface area of the hydrophobic groups exposed to water, and this leads to the increased folding. The alkylation of bivalent secondary anilides induces a switch from Z to E amide that alters the scaffold orientation. The synthesis of a bivalent mannoside, based on a secondary anilide scaffold, for investigation of mannose-binding receptor cross-linking and lattice formation is described.
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Affiliation(s)
- Manuela Tosin
- Centre for Synthesis and Chemical Biology, Department of Chemistry, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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Tosin M, O'Brien C, Fitzpatrick GM, Müller-Bunz H, Glass WK, Murphy PV. Synthesis and Structural Analysis of the Anilides of Glucuronic Acid and Orientation of the Groups on the Carbohydrate Scaffolding. J Org Chem 2005; 70:4096-106. [PMID: 15876102 DOI: 10.1021/jo0501994] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structures: see text] The synthesis of anilides derived from glucuronic acid is described. Secondary anilides had a Z configuration in the solid state and showed intramolecular and intermolecular hydrogen bonding. However, on the basis of NMR and IR studies, there was generally no evidence for the same hydrogen bonding in solution. Tertiary anilides showed a strong preference for the E configuration on the basis of NOE studies and molecular mechanics calculations. The alkylation of the secondary anilides induces a configurational switch that alters the orientation of the aromatic group with respect to the pyranose, which has relevance for presentation or orientation of pharmacophoric groups on carbohydrate scaffolds.
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Affiliation(s)
- Manuela Tosin
- Centre for Synthesis and Chemical Biology, Department of Chemistry, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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Angeles AR, Neagu I, Birzin ET, Thornton ER, Smith AB, Hirschmann R. Synthesis and Binding Affinities of Novel SRIF-Mimicking β-d-Glucosides Satisfying the Requirement for a π-Cloud at C1. Org Lett 2005; 7:1121-4. [PMID: 15760154 DOI: 10.1021/ol050119i] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The synthesis of four bioactive analogues of the somatostatin (SRIF-14) mimetic, beta-d-glucoside (+)-2, in which the C1 indole side chain is replaced with indole surrogates, has been achieved. These congeners, possessing the naphthyl, benzothiophene, benzyl, and benzofuran substituents, were predicted to satisfy the electrostatic requirements of the tryptophan binding pocket of SRIF. Unlike the previously described C4 picolyl and pyrazinyl congeners, these ligands bind the hSST4 receptor.
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Affiliation(s)
- Angie R Angeles
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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46
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Velasco-Torrijos T, Murphy PV. Synthesis and conformational analysis of novel water soluble macrocycles incorporating carbohydrates, including a β-cyclodextrin mimic. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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47
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Tosin M, Gouin SG, Murphy PV. Synthesis of Structurally Diverse and Defined Bivalent Mannosides on Saccharide Scaffolding. Org Lett 2004; 7:211-4. [PMID: 15646960 DOI: 10.1021/ol047841l] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
[Structure: see text] The synthesis of bivalent mannosides by the grafting of alpha-D-mannopyranoside onto monosaccharide acceptors and conjugation to terephthalic acid or phenylenediamine is described. Computational methods were used to predict accessible orientations and distances between the mannose units.
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Affiliation(s)
- Manuela Tosin
- Centre for Synthesis and Chemical Biology, Chemistry Department, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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48
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Synthesis of peptidomimetics based on iminosugar and β-d-glucopyranoside scaffolds and inhibiton of HIV-protease. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.05.080] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Virta P, Leppänen M, Lönnberg H. Pentaerythrityltetramine Scaffolds for Solid-Phase Combinatorial Chemistry1. J Org Chem 2004; 69:2008-16. [PMID: 15058947 DOI: 10.1021/jo035801+] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Straightforward synthesis for two pentaerythrityltetramine precursors, 2,2-bis(azidomethyl)propane-1,3-diamine (1) and 2-[N-(allyloxycarbonyl)aminomethyl]-2-azidomethylpropane-1,3-diamine (2), has been described. Both propane-1,3-diamines have been attached by reductive amination to a solid-supported backbone amide linker derived from 4-(4-formyl-3,5-dimethoxyphenoxy)butyric acid. The presence of the two methoxy substituents on the linker is essential to avoid cross-linking between two linkers. The remaining free primary amino group of the propane-1,3-diamine moiety may then be selectively acylated with an appropriately protected amino acid using conventional N,N-dicyclohexylcarbodiimide/1-hydroxybenzotriazole (DCC/HOBt) activation without any interference by the secondary amino function. The latter group may be subsequently acylated by an anhydride method. Sequential reduction of the azido group and removal of the allyloxycarbonyl protection from 2 allow further coupling of two different amino acids, and hence, this handle may be utilized in construction of branched structures containing four different amino acids or peptides. Solid-supported 1 may, in turn, be used for the synthesis of similar constructs containing two identical branches. It is worth noting that no acid-labile protecting groups are required in this approach, and hence, this dimension may be saved for the cleavage of the linker. The applicability of the scaffolds to library synthesis has been demonstrated by preparation of 11 pentaerythrityl-branched tetra- and octapeptides.
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Affiliation(s)
- Pasi Virta
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland.
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