1
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Li W, Yu B. Temporary ether protecting groups at the anomeric center in complex carbohydrate synthesis. Adv Carbohydr Chem Biochem 2020; 77:1-69. [PMID: 33004110 DOI: 10.1016/bs.accb.2019.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The synthesis of a carbohydrate building block usually starts with introduction of a temporary protecting group at the anomeric center and ends with its selective cleavage for further transformation. Thus, the choice of the anomeric temporary protecting group must be carefully considered because it should retain intact during the whole synthetic manipulation, and it should be chemoselectively removable without affecting other functional groups at a late stage in the synthesis. Etherate groups are the most widely used temporary protecting groups at the anomeric center, generally including allyl ethers, MP (p-methoxyphenyl) ethers, benzyl ethers, PMB (p-methoxybenzyl) eithers, and silyl ethers. This chapter provides a comprehensive review on their formation, cleavage, and applications in the synthesis of complex carbohydrates.
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Affiliation(s)
- Wei Li
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, China.
| | - Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.
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2
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Adabala PJP, Shamsi Kazem Abadi S, Akintola O, Bhosale S, Bennet AJ. Conformationally Controlled Reactivity of Carbasugars Uncovers the Choreography of Glycoside Hydrolase Catalysis. J Org Chem 2020; 85:3336-3348. [PMID: 31994882 DOI: 10.1021/acs.joc.9b03152] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Glycoside hydrolases (GHs) catalyze hydrolyses of glycoconjugates in which the enzyme choreographs a series of conformational changes during the catalytic cycle. As a result, some GH families, including α-amylases (GH13), have their chemical steps concealed kinetically. To address this issue for a GH13 enzyme, we prepared seven cyclohexenyl-based carbasugars of α-d-glucopyranoside that we show are good covalent inhibitors of a GH13 yeast α-glucosidase. The linear free energy relationships between rate constants and pKa of the leaving group are curved upward, which is indicative of a change in mechanism, with the better leaving groups reacting by an SN1 mechanism, while reaction rates for the worse leaving groups are limited by a conformational change of the Michaelis complex prior to a rapid SN2 reaction with the enzymatic nucleophile. Five bicyclo[4.1.0]heptyl-based carbaglucoses were tested with this enzyme, and our results are consistent with pseudoglycosidic bond cleavage that occurs via SN1 transition states that include nonproductive binding of the leaving group to the enzyme. In total, we show that the conformationally orthogonal reactions of these two carbasugars reveal mechanistic details hidden by conformational changes that the Michaelis complex of the enzyme and natural substrate undergoes which align the nucleophile for efficient catalysis.
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Affiliation(s)
- Pal John Pal Adabala
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Saeideh Shamsi Kazem Abadi
- Department of Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Oluwafemi Akintola
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Sandeep Bhosale
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Andrew J Bennet
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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3
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Abstract
We describe the synthesis of the unusual bicyclic sugar bradyrhizose in 14 steps and a 6% overall yield from d-glucose. The synthesis involves the elaboration of a trans-fused carbocyclic ring onto the preexisting glucopyranose framework followed by adjustment of the oxidation levels. Key steps include radical extension of the glucopyranose side chain, ring closing metathesis, allylic oxidation, Luche reduction, hydroxy-directed epoxidation, and acid-catalyzed epoxide opening at the more substituted position.
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Affiliation(s)
- Philemon Ngoje
- Department of Pharmaceutical and Biomedical Sciences , University of Georgia , 250 West Green Street , Athens , Georgia 30602 , United States.,Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - David Crich
- Department of Pharmaceutical and Biomedical Sciences , University of Georgia , 250 West Green Street , Athens , Georgia 30602 , United States.,Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States.,Department of Chemistry , University of Georgia , 140 Cedar Street , Athens , Georgia 30602 , United States.,Complex Carbohydrate Research Center , University of Georgia , 315 Riverbend Road , Athens , Georgia 30602 , United States
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4
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Yang X, Yuan P, Shui F, Zhou Y, Chen X. A divergent strategy to synthesize gabosines featuring a switchable two-way aldol cyclization. Org Biomol Chem 2019; 17:4061-4072. [PMID: 30951069 DOI: 10.1039/c9ob00469f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gabosines and their natural analogues, belonging to C7 carbasugars, have attracted great attention in synthesis due to their rich structural variety and promising biological activities. A new diversity-oriented approach for the gabosine-type carbasugars based on a tunable regioselective aldol cyclization of flexible precursor 2 is explored. Two cyclization modes (A and B) of the precursor can be well controlled by switching promoters to selectively produce two resulting cyclohexa(e)nones 3 and 10, both of which are versatile intermediates for various C7 carbasugars. After the conversion of 3 to eight natural carbasugars, the utility of intermediate 10 is illustrated by the first synthesis of (-)-gabosine L, as well as the new synthesis of (-)-gabosine A, (-)-gabosine B, (-)-gabosine N and (-)-gabosine O. The chemical structure and the absolute configuration of (-)-gabosine L are confirmed by its total synthesis.
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Affiliation(s)
- Xing Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China.
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5
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Ng WL, Li HC, Lau KM, Chan AKN, Lau CBS, Shing TKM. Concise and Stereodivergent Synthesis of Carbasugars Reveals Unexpected Structure-Activity Relationship (SAR) of SGLT2 Inhibition. Sci Rep 2017; 7:5581. [PMID: 28717146 PMCID: PMC5514135 DOI: 10.1038/s41598-017-05895-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/05/2017] [Indexed: 11/10/2022] Open
Abstract
Carbasugar sodium-glucose cotransporter 2 (SGLT2) inhibitors are highly promising drug candidates for the treatment of Type 2 diabetes mellitus (T2DM). However, the clinical usage of carbasugar SGLT2 inhibitors has been underexplored, due to the lengthy synthetic routes and the lack of structure-activity relationship (SAR) studies of these compounds. Herein, we report a concise and stereodivergent synthetic route towards some novel carbasugar SGLT2 inhibitors, featuring an underexploited, regioselective, and stereospecific palladium-catalyzed allyl-aryl coupling reaction. This synthetic strategy, together with computational modeling, revealed the unexpected SAR of these carbasugar SGLT2 inhibitors, and enabled the discovery of a highly selective and potent SGLT2 inhibitor.
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Affiliation(s)
- Wai-Lung Ng
- Department of Chemistry and Centre of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.,Department of Medicine, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Ho-Chuen Li
- Department of Chemistry and Centre of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Kit-Man Lau
- Institute of Chinese Medicine and State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Anthony K N Chan
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Clara Bik-San Lau
- Institute of Chinese Medicine and State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Tony K M Shing
- Department of Chemistry and Centre of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
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6
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Yuan P, Liu X, Yang X, Zhang Y, Chen X. Total Syntheses of (+)-Gabosine P, (+)-Gabosine Q, (+)-Gabosine E, (-)-Gabosine G, (-)-Gabosine I, (-)-Gabosine K, (+)-Streptol, and (-)-Uvamalol A by a Diversity-Oriented Approach Featuring Tunable Deprotection Manipulation. J Org Chem 2017; 82:3692-3701. [PMID: 28276688 DOI: 10.1021/acs.joc.7b00181] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new diversity-oriented approach to C7-cyclitols, which possess a broad spectrum of biological activities, is developed. The key polyoxygenated intermediates with different O-protecting groups were accessed by an intramolecular aldol-cyclization of a diketone derived from δ-d-gluconolactone. The versatile intermediates can be easily transformed into structurally different carbasugars based on control of deprotection manipulation. The utility of the robust approach is illustrated by the first syntheses of (+)-gabosines P and Q, as well as the syntheses of several other gabosines and related analogues viz. (+)-gabosine E, (-)-gabosine G, (-)-gabosine I, (-)-gabosine K, (+)-streptol, and (-)-uvamalol A. In addition, the absolute configuration of (-)-uvamalol A is assigned by its total synthesis.
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Affiliation(s)
- Po Yuan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, PR China
| | - Xiaojing Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, PR China
| | - Xing Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, PR China
| | - Yanli Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, PR China
| | - Xiaochuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, PR China
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7
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Synthesis of Natural O-Linked Carba-Disaccharides, (+)- and (-)-Pericosine E, and Their Analogues as α-Glucosidase Inhibitors. Mar Drugs 2017; 15:md15010022. [PMID: 28124983 PMCID: PMC5295242 DOI: 10.3390/md15010022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/12/2017] [Accepted: 01/16/2017] [Indexed: 12/04/2022] Open
Abstract
Pericosine E (6), a metabolite of Periconia byssoides OUPS-N133 was originally isolated from the sea hare Aplysia kurodai, which exists as an enantiomeric mixture in nature. The enantiospecific syntheses of both enantiomers of Periconia byssoides OUPS-N133 has been achieved, along with six stereoisomers, using a common simple synthetic strategy. For these efficient syntheses, highly regio- and steroselective processes for the preparation of bromohydrin and anti-epoxide intermediates were applied. In order to access the unique O-linked carbadisaccharide structure, coupling of chlorohydrin as a donor and anti-epoxide as an acceptor was achieved using catalytic BF3·Et2O. Most of the synthesized compounds exhibited selectively significant inhibitory activity against α-glycosidase derived from yeast. The strongest analog showed almost 50 times the activity of the positive control, deoxynojirimycin.
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8
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Rajasekaran P, Singh GP, Hassam M, Vankar YD. A Cascade “Prins-Pinacol-Type Rearrangement and C4-OBn Participation” on Carbohydrate Substrates: Synthesis of Bridged Tricyclic Ketals, Annulated Sugars and C2-Branched Heptoses. Chemistry 2016; 22:18383-18387. [DOI: 10.1002/chem.201604902] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Indexed: 12/25/2022]
Affiliation(s)
| | - Govind Pratap Singh
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India
| | - Mohammad Hassam
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India
| | - Yashwant D. Vankar
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India
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9
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Chung CY, Angamuthu V, Li LS, Hou DR. Palladium-Catalyzed Allylic Substitution for the Synthesis of Pericosines. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Cheng-Yu Chung
- Department of Chemistry; National Central University; 300 Jhong-Da Rd Jhong-Li Taoyuan 32001 Taiwan
| | - Venkatachalam Angamuthu
- Department of Chemistry; National Central University; 300 Jhong-Da Rd Jhong-Li Taoyuan 32001 Taiwan
| | - Long-Shiang Li
- Department of Chemistry; National Central University; 300 Jhong-Da Rd Jhong-Li Taoyuan 32001 Taiwan
| | - Duen-Ren Hou
- Department of Chemistry; National Central University; 300 Jhong-Da Rd Jhong-Li Taoyuan 32001 Taiwan
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10
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Petermichl M, Loscher S, Schobert R. Total Synthesis of Aurantoside G, anN-β-Glycosylated 3-Oligoenoyltetramic Acid fromTheonella swinhoei. Angew Chem Int Ed Engl 2016; 55:10122-5. [DOI: 10.1002/anie.201604912] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 01/30/2023]
Affiliation(s)
- Markus Petermichl
- Organic Chemistry Laboratory; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| | - Sebastian Loscher
- Organic Chemistry Laboratory; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| | - Rainer Schobert
- Organic Chemistry Laboratory; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
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11
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Petermichl M, Loscher S, Schobert R. Totalsynthese von Aurantosid G, einer N-β-glycosylierten 3-Oligoenoyltetramsäure ausTheonella swinhoei. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Markus Petermichl
- Lehrstuhl für Organische Chemie; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
| | - Sebastian Loscher
- Lehrstuhl für Organische Chemie; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
| | - Rainer Schobert
- Lehrstuhl für Organische Chemie; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
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12
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Rowicki T, Malinowski M, Łapczyński S, Gryszel M, Czerwińska K, Madura I, Sas W. Epimerization of the α Stereocenter ind-Ribose-Derived Nitrones: Direct Access to Variant Quinolizidines withd-Ribo andd-Arabino Configurations. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Tomasz Rowicki
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Maciej Malinowski
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Sebastian Łapczyński
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Maciej Gryszel
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Karolina Czerwińska
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Izabela Madura
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Wojciech Sas
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
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13
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Bera S, Das SK, Saha T, Panda G. Total synthesis of 3-epi-(+)-lycoricidine from Garner aldehyde via intramolecular aldol cyclization. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Sánchez-Fernández EM, Álvarez E, Ortiz Mellet C, García Fernández JM. Synthesis of Multibranched Australine Derivatives from Reducing Castanospermine Analogues through the Amadori Rearrangement of gem-Diamine Intermediates: Selective Inhibitors of β-Glucosidase. J Org Chem 2014; 79:11722-8. [DOI: 10.1021/jo5025283] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Elena M. Sánchez-Fernández
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Sevilla, c/Profesor García González 1, E-41012 Sevilla, Spain
| | - Eleuterio Álvarez
- Instituto
de Investigaciones Químicas, CSIC − Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, E-41092 Sevilla, Spain
| | - Carmen Ortiz Mellet
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Sevilla, c/Profesor García González 1, E-41012 Sevilla, Spain
| | - José M. García Fernández
- Instituto
de Investigaciones Químicas, CSIC − Universidad de Sevilla, c/Américo Vespucio 49, Isla de la Cartuja, E-41092 Sevilla, Spain
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15
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Ansari AA, Rajasekaran P, Khan MM, Vankar YD. Bicyclic Hybrid Sugars as Glycosidase Inhibitors: Synthesis and Comparative Study of Inhibitory Activities of Fused Oxa-Oxa, Oxa-Aza, and Oxa-Carbasugar Hybrid Molecules. J Org Chem 2014; 79:1690-9. [DOI: 10.1021/jo402574h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Alafia A. Ansari
- Department
of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
| | - Parasuraman Rajasekaran
- Department
of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
| | - M. Musawwer Khan
- Department
of Chemistry, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India
| | - Yashwant D. Vankar
- Department
of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
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16
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Shing TKM, Ng WL, Chan JYW, Lau CBS. Design, Syntheses, and SAR Studies of Carbocyclic Analogues of Sergliflozin as Potent Sodium-Dependent Glucose Cotransporter 2 Inhibitors. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302543] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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17
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Shing TKM, Ng WL, Chan JYW, Lau CBS. Design, syntheses, and SAR studies of carbocyclic analogues of sergliflozin as potent sodium-dependent glucose cotransporter 2 inhibitors. Angew Chem Int Ed Engl 2013; 52:8401-5. [PMID: 23784919 DOI: 10.1002/anie.201302543] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Indexed: 01/10/2023]
Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
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18
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19
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Shing TKM, Wu HT, Kwok HF, Lau CBS. Synthesis of chiral hydroxylated enones as potential anti-tumor agents. Bioorg Med Chem Lett 2012; 22:7562-5. [PMID: 23102892 DOI: 10.1016/j.bmcl.2012.10.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 09/17/2012] [Accepted: 10/04/2012] [Indexed: 11/29/2022]
Abstract
A series of chiral hydroxylated enones were synthesized as COTC ether analogues to investigate the structural features required for optimal and selective anti-tumor activity. The cytotoxicity of the seven COTC ether analogues against WRL-68 normal and HepG2, HL-60 cancer cell lines were measured. C-4 ether analogues with an aliphatic chain substituent were found to be more favorable than their aromatic counterparts. Inversion of the configuration at C-4 in 5e to give 5f only resulted in reduced selectivity towards cancer cells. These results show that 4-O-pentyl-gabosine D (5e) has optimum selectivity and cytotoxicity towards two cancer cell lines.
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
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20
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Sánchez‐Fernández EM, Rísquez‐Cuadro R, Ortiz Mellet C, García Fernández JM, Nieto PM, Angulo J. sp
2
‐Iminosugar
O
‐,
S
‐, and
N
‐Glycosides as Conformational Mimics of α‐Linked Disaccharides; Implications for Glycosidase Inhibition. Chemistry 2012; 18:8527-39. [DOI: 10.1002/chem.201200279] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 02/28/2012] [Indexed: 12/29/2022]
Affiliation(s)
- Elena M. Sánchez‐Fernández
- Instituto de Investigaciones Químicas (IIQ), CSIC–Universidad de Sevilla, Avda. Americo Vespucio 49, 41092, Sevilla (Spain), Fax: (+34) 954460565
| | - Rocío Rísquez‐Cuadro
- Departmento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Prof. García González 1, 41012, Sevilla (Spain), Fax: (+34) 954624960
| | - Carmen Ortiz Mellet
- Departmento de Química Orgánica, Facultad de Química, Universidad de Sevilla, C/Prof. García González 1, 41012, Sevilla (Spain), Fax: (+34) 954624960
| | - José M. García Fernández
- Instituto de Investigaciones Químicas (IIQ), CSIC–Universidad de Sevilla, Avda. Americo Vespucio 49, 41092, Sevilla (Spain), Fax: (+34) 954460565
| | - Pedro M. Nieto
- Instituto de Investigaciones Químicas (IIQ), CSIC–Universidad de Sevilla, Avda. Americo Vespucio 49, 41092, Sevilla (Spain), Fax: (+34) 954460565
| | - Jesús Angulo
- Instituto de Investigaciones Químicas (IIQ), CSIC–Universidad de Sevilla, Avda. Americo Vespucio 49, 41092, Sevilla (Spain), Fax: (+34) 954460565
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21
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MuniRaju C, Rao JP, Rao BV. Stereoselective synthesis of (+)-pericosine B and (+)-pericosine C using ring closing metathesis approach. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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22
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Wang CH, Wu HT, Cheng HM, Yen TJ, Lu IH, Chang HC, Jao SC, Shing TKM, Li WS. Inhibition of Glutathione S-Transferase M1 by New Gabosine Analogues Is Essential for Overcoming Cisplatin Resistance in Lung Cancer Cells. J Med Chem 2011; 54:8574-81. [DOI: 10.1021/jm201131n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chie-Hong Wang
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Ho T. Wu
- Department of Chemistry and
Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Hau M. Cheng
- Department of Chemistry and
Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Tien-Jui Yen
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - I-Hsuan Lu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | | | - Shu-Chuan Jao
- Institute of Biological Chemistry, Academia Sinica, Taipei 115,
Taiwan
| | - Tony K. M. Shing
- Department of Chemistry and
Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Wen-Shan Li
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
- Doctoral Degree
Program in Marine
Biotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
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23
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Synthesis and α-Glucosidase II inhibitory activity of valienamine pseudodisaccharides relevant to N-glycan biosynthesis. Bioorg Med Chem Lett 2011; 21:5219-23. [DOI: 10.1016/j.bmcl.2011.07.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 07/11/2011] [Accepted: 07/12/2011] [Indexed: 11/18/2022]
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Cumpstey I. Short synthesis of a benzyl ether-protected building block for the synthesis of carbocyclic galactopyranose mimics. Carbohydr Res 2010; 345:1056-60. [PMID: 20394917 DOI: 10.1016/j.carres.2010.03.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Revised: 03/18/2010] [Accepted: 03/23/2010] [Indexed: 11/25/2022]
Abstract
A versatile intermediate for the synthesis of galactose-mimicking carbasugars was synthesised from tetrabenzyl galactose in five steps and 30% overall yield. The reaction sequence uses an L-proline-mediated aldol reaction as key step. The reaction sequence was run on several grams of material.
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Affiliation(s)
- Ian Cumpstey
- Department of Organic Chemistry, The Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden.
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25
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Shing TKM, Cheng HM. An Alternative Synthesis of 1,1′-Bis-valienamine from d-Glucose. J Org Chem 2010; 75:3522-5. [DOI: 10.1021/jo100474p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tony K. M. Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Hau M. Cheng
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong
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26
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Wardrop DJ, Waidyarachchi SL. Synthesis and biological activity of naturally occurring α-glucosidase inhibitors. Nat Prod Rep 2010; 27:1431-68. [DOI: 10.1039/b914958a] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Stathakis CI, Athanatou MN, Gallos JK. Synthesis of ent-gabosine E from d-mannose by intramolecular nitrone–olefin cycloaddition. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.154] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Cumpstey I. Synthesis of carbasugar-containing non-glycosidically linked pseudodisaccharides and higher pseudooligosaccharides. Carbohydr Res 2009; 344:2285-310. [DOI: 10.1016/j.carres.2009.09.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 09/02/2009] [Accepted: 09/09/2009] [Indexed: 12/01/2022]
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Abstract
(+)-Gabosines A (12), D (4), and E (5), which share the same trihydroxycyclohexenone skeleton, were synthesized from enone 11 as the common intermediate. The key building block 11 was accessed by an intramolecular aldol cyclization of a diketone derived from D-glucose (8).
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin NT, Hong Kong, China.
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30
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Ghayur MN. Traditional Chinese Medicine Research and Education in Canada. J Altern Complement Med 2009; 15:689-94. [DOI: 10.1089/acm.2008.0552] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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31
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Doddi VR, Kancharla PK, Reddy YS, Kumar A, Vankar YD. Synthesis of fused pyran-carbahexopyranoses as glycosidase inhibitors. Carbohydr Res 2009; 344:606-12. [DOI: 10.1016/j.carres.2009.01.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Revised: 01/16/2009] [Accepted: 01/18/2009] [Indexed: 11/29/2022]
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32
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Shing TKM, Cheng HM. Intramolecular direct aldol reactions of sugar diketones: syntheses of valiolamine and validoxylamine G. Org Lett 2008; 10:4137-9. [PMID: 18729372 DOI: 10.1021/ol801889n] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new and stereoselective intramolecular direct aldol reaction of diketones derived from carbohydrates has been developed to construct carbocycles with D-gluco-, D-galacto-, D-manno-, and L-ido-configurations. The stereochemical outcome of the aldol reaction of the diketone is dependent on the base used. Transformation of D-gluco-aldols readily affords valiolamine which also constitutes a formal synthesis of voglibose. Facile conversion of D-gluco-cyclohexanones into validoxylamine G has been achieved in 12 steps with 15.1% overall yield from D-glucose.
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
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