1
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Li J, Fu Z, Qiao Z, Xie D, Zhang L, Liu YZ, Yang J, Yan JX, Ma X. Controllable 1,3-Bis-Functionalization of 2-Nitroglycals with High Regioselectivity and Stereoselectivity Enabled by a H-Bond Catalyst. JACS AU 2024; 4:974-984. [PMID: 38559736 PMCID: PMC10976612 DOI: 10.1021/jacsau.3c00727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/26/2024] [Accepted: 02/26/2024] [Indexed: 04/04/2024]
Abstract
The selective modification of carbohydrates is significant for producing their unnatural analogues for drug discovery. C1-functionalization (glycosylation) and C1,C2-difunctionalization of carbohydrates have been well developed. In contrast, C3-functionalization or C1,C3-difunctionalization of carbohydrates remains rare. Herein, we report such processes that efficiently and stereoselectively modify carbohydrates. Specifically, we found that trifluoroethanol (TFE) could promote 1,3-bis-indolylation/pyrrolylation of 2-nitroglycals generated carbohydrate derivatives in up to 93% yield at room temperature; slightly reducing the temperature could install two different indoles at the C1- and C3-positions. Switching TFE to a bifunctional amino thiourea catalyst leads to the generation of C3 monosubstituted carbohydrates, which could also be used to construct 1,3-di-C-functionalized carbohydrates. This approach produced a range of challenging sugar derivatives (over 80 examples) with controllable and high stereoselectivity (single isomer for over 90% of the examples). The potential applications of the reaction were demonstrated by a set of transformations including the synthesis of bridged large-ring molecules and gram scale reactions. Biological activities evaluation demonstrated that three compounds exhibit a potent inhibitory effect on human cancer cells T24, HCT116, AGS, and MKN-45 with IC50 ranged from 0.695 to 3.548 μM.
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Affiliation(s)
- Jiangtao Li
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Zhengyan Fu
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- Department
of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy,
West China Hospital, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Zeen Qiao
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Demeng Xie
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
| | - Li Zhang
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Ya-Zhou Liu
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
| | - Jian Yang
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Jia-Xin Yan
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xiaofeng Ma
- Natural
Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
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2
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Wu X, Zheng Z, Wang L, Xue Y, Liao J, Liu H, Liu D, Sun JS, Zhang Q. Stereoselective Synthesis of 2,3‐diamino‐2,3‐dideoxyglycosides from 3‐O‐acetyl‐2‐nitroglycals. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaopei Wu
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Zhichao Zheng
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Liming Wang
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Yunxia Xue
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Jinxi Liao
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Hui Liu
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Deyong Liu
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Jian-Song Sun
- Jiangxi Normal University Jiangxi Normal University CHINA
| | - Qingju Zhang
- Jiangxi Normal University National Research Centre for Carbohydrate Synthesis 99 Ziyang Avenue 330022 Nanchang CHINA
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3
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Zargar IA, Hussain N, Mukherjee D. Conversion of Glycals to 2,3-Di-Substituted-3-Deoxy-Glycals via N-(Glycosyloxy) Acetamides Assisted C-2-Alkenylation and C-3-Nucleophilic Substitution. Chem Asian J 2022; 17:e202200350. [PMID: 35485806 DOI: 10.1002/asia.202200350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Indexed: 11/08/2022]
Abstract
Transformation of glycals to 2,3-di-substituted-3-dexoy-glycals were achieved by sequential C2 alkenylation of pseudoglycals followed by capture of nucleophiles at C3 position. Anomeric linked N-(glycosyloxy) acetamides group assisted innate C2-H activation of pseudoglycals under palladium catalysis is achieved. The synthesized C2 alkenylated products were further attacked by thio/amino nucleophiles at C3 position under basic conditions in stereo-selective fashion to generate 2,3-branched glycals with the elimination of directing groups and translocation of double bond. Different control experiments were conducted to establish the role of directing groups in C-H functionalization of pseudoglycals and reason for selectivity.
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Affiliation(s)
- Irshad Ahmad Zargar
- CSIR-Indian Institute of Integrative Medicine: Council of Scientific & Industrial Research Indian Institute of Integrative Medicine, Natural Product chemistry, INDIA
| | - Nazar Hussain
- Banaras Hindu University, Medicinal Chemistry, INDIA
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4
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Liu J, Han P, Liao JX, Tu YH, Zhou H, Sun JS. Palladium-Catalyzed Cross-Coupling of 2-Iodoglycals with N-Tosylhydrazones: Access to 2-C-Branched Glycoconjugates and Oxadecalins. J Org Chem 2019; 84:9344-9352. [DOI: 10.1021/acs.joc.9b01056] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianchao Liu
- The National Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Puren Han
- The National Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Jin-Xi Liao
- The National Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Yuan-Hong Tu
- The National Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Huiwen Zhou
- The National Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Jian-Song Sun
- The National Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
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5
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Parasuraman K, Chennaiah A, Dubbu S, Ibrahim Sheriff AK, Vankar YD. Stereoselective synthesis of substituted 1,2-annulated sugars by domino double-Michael addition reaction. Carbohydr Res 2019; 477:26-31. [PMID: 30954772 DOI: 10.1016/j.carres.2019.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 03/04/2019] [Accepted: 03/18/2019] [Indexed: 11/16/2022]
Abstract
A simple, highly stereoselective one-pot methodology for the synthesis of novel 1,2-annulated sugars comprising of oxa-oxa and oxa-carbasugar fused skeletons from 2-nitrogalactal and a sugar-derived enone, obtained from 2-formylgalactal, promoted by KOtBu and CH3ONa respectively is described. Both processes rely on a domino double-Michael addition reaction resulting in the formation of three stereocenters in a single pot, including a quaternary center.
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Affiliation(s)
- Kadigachalam Parasuraman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India; PG and Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam, 632509, Tamil Nadu, India
| | - Ande Chennaiah
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sateesh Dubbu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - A K Ibrahim Sheriff
- PG and Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam, 632509, Tamil Nadu, India
| | - Yashwant D Vankar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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6
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Verma AK, Dubbu S, Chennaiah A, Vankar YD. Synthesis of di- and trihydroxy proline derivatives from D-glycals: Application in the synthesis of polysubstituted pyrrolizidines and bioactive 1C-aryl/alkyl pyrrolidines. Carbohydr Res 2019; 475:48-55. [PMID: 30825721 DOI: 10.1016/j.carres.2019.02.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/01/2019] [Accepted: 02/14/2019] [Indexed: 10/27/2022]
Abstract
Six different types of O-benzyl protected proline derivatives have been synthesized from D-glycals and 2C-formyl-glycals. One of the di-O-benzyl protected proline derivatives has been utilized for the synthesis of polysubstituted pyrrolizidines via [3 + 2] cycloaddition in a stereoselective manner. Further, we also report on the stereoselective synthesis of biologically active 1C-aryl/alkyl pyrrolidines i.e. 4-epi-radicamine B, 4-epi-radicamine A, 1C-butyl and 1C-methyl pyrrolidines through double reductive amination of a variety of D-glucal derived diketones with p-methoxybenzylamine.
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Affiliation(s)
- Ashish Kumar Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sateesh Dubbu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Ande Chennaiah
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Yashwant D Vankar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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7
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Verma AK, Chennaiah A, Dubbu S, Vankar YD. Palladium catalyzed synthesis of sugar-fused indolines via C(sp 2)-H/NH activation. Carbohydr Res 2019; 473:57-65. [PMID: 30639591 DOI: 10.1016/j.carres.2018.12.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 12/26/2018] [Accepted: 12/26/2018] [Indexed: 11/28/2022]
Abstract
A simple Pd(OAc)2 catalyzed strategy for the synthesis of sugar-fused indolines from 2-N-oxalylamido-2-deoxy-C-aryl glycosides is reported by utilizing N-oxalylamido group as an auxiliary via C(sp2)-H/NH Activation. The reaction is successfully applied on glucose as well as galactose derived differently substituted 2-N-oxalylamido-2-deoxy-C-aryl glycosides to give sugar-fused indolines in moderate to good yields. The utility of this strategy in the synthesis of sugar-fused indoles is also described.
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Affiliation(s)
- Ashish Kumar Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Ande Chennaiah
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sateesh Dubbu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Yashwant D Vankar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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8
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Chennaiah A, Dahiya A, Dubbu S, Vankar YD. A Stereoselective Synthesis of an Imino Glycal: Application in the Synthesis of (-)-1-epi-Adenophorine and a Homoimindosugar. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801241] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ande Chennaiah
- Department of Chemistry; Indian Institute of Technology Kanpur; -208016 Kanpur India
| | - Amit Dahiya
- Department of Chemistry; Indian Institute of Technology Kanpur; -208016 Kanpur India
| | - Sateesh Dubbu
- Department of Chemistry; Indian Institute of Technology Kanpur; -208016 Kanpur India
| | - Yashwant D. Vankar
- Department of Chemistry; Indian Institute of Technology Kanpur; -208016 Kanpur India
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9
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Liu JL, Zhang YT, Liu HF, Zhou L, Chen J. N-Heterocyclic Carbene Catalyzed Stereoselective Glycosylation of 2-Nitrogalactals. Org Lett 2017; 19:5272-5275. [PMID: 28906121 DOI: 10.1021/acs.orglett.7b02543] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An efficient N-heterocyclic carbene catalyzed glycosylation of 2-nitrogalactals with alcohols and phenol has been developed for the first time. A wide variety of 1,2-cis-2-nitroglycosides can be obtained with good to excellent yields and high to excellent α-selectivities.
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Affiliation(s)
- Jia-Lin Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Yu-Tong Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Hang-Fan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
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10
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Tang S, Xiong DC, Jiang S, Ye XS. Nitro-polyols via Pyridine Promoted C═C Cleavage of 2-Nitroglycals. Application to the Synthesis of (−)-Hyacinthacine A1. Org Lett 2016; 18:568-71. [DOI: 10.1021/acs.orglett.5b03607] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Shengbiao Tang
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - De-Cai Xiong
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Shende Jiang
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, China
| | - Xin-Shan Ye
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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11
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Bera S, Chatterjee B, Mondal D. Construction of quaternary stereocentres on carbohydrate scaffolds. RSC Adv 2016. [DOI: 10.1039/c6ra13898e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This review describes a glimpse of the various strategies for constructing stereo-defined quaternary centres in densely functionalised carbohydrates moiety of structurally intriguing and biologically potent natural products and building blocks.
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Affiliation(s)
- Smritilekha Bera
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar-382030
- India
| | | | - Dhananjoy Mondal
- School of Chemical Sciences
- Central University of Gujarat
- Gandhinagar-382030
- India
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12
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Delaunay T, Poisson T, Jubault P, Pannecoucke X. 2-Nitroglycals: Versatile Building Blocks for the Synthesis of 2-Aminoglycosides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402805] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Mallick A, Kumari N, Roy R, Palanivel A, Vankar YD. A Concise Synthesis of (2R,3R)- and (2R,3S)-3-Hydroxypipecolic Acids, and Total Synthesis of (-)-Deoxoprosopinine and (+)-2-epi-Deoxoprosopinine fromD-Glycals. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402603] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Dharuman S, Vankar YD. N-Halosuccinimide/AgNO3-Efficient Reagent Systems for One-Step Synthesis of 2-Haloglycals from Glycals: Application in the Synthesis of 2C-Branched Sugars via Heck Coupling Reactions. Org Lett 2014; 16:1172-5. [DOI: 10.1021/ol500039s] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Suresh Dharuman
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Yashwant D. Vankar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
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15
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Dharuman S, Gupta P, Kancharla PK, Vankar YD. Synthesis of 2-Nitroglycals from Glycals Using the Tetrabutylammonium Nitrate–Trifluoroacetic Anhydride–Triethylamine Reagent System and Base-Catalyzed Ferrier Rearrangement of Acetylated 2-Nitroglycals. J Org Chem 2013; 78:8442-50. [DOI: 10.1021/jo401165y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Suresh Dharuman
- Department
of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Preeti Gupta
- Department
of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Pavan K. Kancharla
- Department
of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Yashwant D. Vankar
- Department
of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
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16
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Synthesis of conformationally-constrained thio(seleno)hydantoins and α-triazolyl lactones from d-arabinose as potential glycosidase inhibitors. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.03.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Awan SI, Werz DB. Syntheses of 1,2-annulated and 1-spiroannulated carbohydrate derivatives: Recent developments. Bioorg Med Chem 2012; 20:1846-56. [DOI: 10.1016/j.bmc.2011.10.089] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 10/20/2011] [Accepted: 10/30/2011] [Indexed: 01/09/2023]
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18
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Yin J, Linker T. Recent advances in the stereoselective synthesis of carbohydrate 2-C-analogs. Org Biomol Chem 2012; 10:2351-62. [PMID: 22311080 DOI: 10.1039/c2ob06529k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
C-branched carbohydrates are of current interest for glycochemistry, are widely found in nature and serve as important subunits in many antibiotics, bacterial polysaccharides and macrolides. Among C-functionalized saccharides, 2-C-branched carbohydrates represent challenging structures for synthetic chemists, since in contrast to C-glycosides they are not easily accessible from glycosyl bromides or other simple precursors. In this perspective we want to summarize recent approaches to 2-C-branched carbohydrates over the past fifteen years. The two main strategies are based on ring-opening of 1,2-cyclopropanated carbohydrates by various reagents, as well as radical additions to glycals and further transformations, developed in our group. Both methods are characterized by high stereoselectivities and good yields and give access to a broad variety of functionalized carbohydrate 2-C-analogs.
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Affiliation(s)
- Jian Yin
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Lihu Avenue 1800, 214122 Wuxi, China
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19
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Reddy YS, Kadigachalam P, Basak RK, John Pal A, Vankar YD. Total synthesis of (+)-pericosine B and (+)-pericosine C and their enantiomers by using the Baylis–Hillman reaction and ring-closing metathesis as key steps. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.10.135] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Merino-Montiel P, López Ó, Fernández-Bolaños JG. Unprecedented spiro-annelated sugar isoureas, guanidines and amidines as new families of glycosidase inhibitors. RSC Adv 2012. [DOI: 10.1039/c2ra21561f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Vedachalam S, Tan SM, Teo HP, Cai S, Liu XW. N-Heterocyclic carbene catalyzed C-glycosylation: a concise approach from Stetter reaction. Org Lett 2011; 14:174-7. [PMID: 22185609 DOI: 10.1021/ol202959y] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Described herein is the first example of an organocatalytic approach for acylanion addition to the anomeric carbon of 2-nitroglucal using an N-heterocyclic carbene catalyst. Control over the reaction conditions gives β-selective and nitro-eliminated C-glycosides, providing opportunities to produce new classes of C-glycoside.
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Affiliation(s)
- Seenuvasan Vedachalam
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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22
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Reddy YS, John Pal AP, Gupta P, Ansari AA, Vankar YD. Ceric Ammonium Nitrate-Catalyzed Azidation of 1,2-Anhydro Sugars: Application in the Synthesis of Structurally Diverse Sugar-Derived Morpholine 1,2,3-Triazoles and 1,4-Oxazin-2-ones. J Org Chem 2011; 76:5972-84. [DOI: 10.1021/jo200260w] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Y. Suman Reddy
- Department of Chemistry, Indian Institute of Technology, Kanpur −208 016, India
| | - A. P. John Pal
- Department of Chemistry, Indian Institute of Technology, Kanpur −208 016, India
| | - Preeti Gupta
- Department of Chemistry, Indian Institute of Technology, Kanpur −208 016, India
| | - Alafia A. Ansari
- Department of Chemistry, Indian Institute of Technology, Kanpur −208 016, India
| | - Yashwant D. Vankar
- Department of Chemistry, Indian Institute of Technology, Kanpur −208 016, India
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23
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Kancharla PK, Reddy YS, Dharuman S, Vankar YD. Acetyl Chloride–Silver Nitrate–Acetonitrile: A Reagent System for the Synthesis of 2-Nitroglycals and 2-Nitro-1-Acetamido Sugars from Glycals. J Org Chem 2011; 76:5832-7. [DOI: 10.1021/jo200475h] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pavan K. Kancharla
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Y. Suman Reddy
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Suresh Dharuman
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Yashwant D. Vankar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
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24
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Bhatt B, Thomson RJ, von Itzstein M. Accessing C-1 Phosphonylated 2-Acylamino Uronic Acids via 2-Nitro-glycals. J Org Chem 2011; 76:4099-104. [DOI: 10.1021/jo2002193] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Beenu Bhatt
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4222, Australia
| | - Robin J. Thomson
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4222, Australia
| | - Mark von Itzstein
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4222, Australia
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