1
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Mondal S, Tseng CJ, Tan JJY, Lin DY, Lin HY, Weng JH, Lin CH, Mong KKT. Tunable Strategy for the Asymmetric Synthesis of Sulfoglycolipids from Mycobacterium tuberculosis To Elucidate the Structure and Immunomodulatory Property Relationships. Angew Chem Int Ed Engl 2023; 62:e202212514. [PMID: 36349422 DOI: 10.1002/anie.202212514] [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: 08/24/2022] [Indexed: 11/11/2022]
Abstract
We developed a versatile asymmetric strategy to synthesize different classes of sulfoglycolipids (SGLs) from Mycobacterium tuberculosis. The strategy features the use of asymmetrically protected trehaloses, which were acquired from the glycosylation of TMS α-glucosyl acceptors with benzylidene-protected thioglucosyl donors. The positions of the protecting groups at the donors and acceptors can be fine-tuned to obtain different protecting-group patterns, which is crucial for regioselective acylation and sulfation. In addition, a chemoenzymatic strategy was established to prepare the polymethylated fatty acid building blocks. The strategy employs inexpensive lipase as a desymmetrization agent in the preparation of the starting substrate and readily available chiral oxazolidinone as a chirality-controlling agent in the construction of the polymethylated fatty acids. A subsequent investigation on the immunomodulatory properties of each class of SGLs showed how the structures of SGLs impact the host innate immunity response.
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Affiliation(s)
- Soumik Mondal
- Applied Chemistry Department, National Yang Ming Chiao Tung University (Previously National Chiao Tung University), 1001, University Road, Hsinchu City, Taiwan, R. O. C
| | - Chieh-Jen Tseng
- Applied Chemistry Department, National Yang Ming Chiao Tung University (Previously National Chiao Tung University), 1001, University Road, Hsinchu City, Taiwan, R. O. C
| | - Janet Jia-Yin Tan
- Institute of Biological Chemistry, Academia Sinica, No.128, Academia Road Section2, Nan-Kang, Taipei, 11529, Taiwan
| | - Ding-Yuan Lin
- Applied Chemistry Department, National Yang Ming Chiao Tung University (Previously National Chiao Tung University), 1001, University Road, Hsinchu City, Taiwan, R. O. C
| | - Hsien-Ya Lin
- Institute of Biological Chemistry, Academia Sinica, No.128, Academia Road Section2, Nan-Kang, Taipei, 11529, Taiwan
| | - Jui-Hsia Weng
- Institute of Biological Chemistry, Academia Sinica, No.128, Academia Road Section2, Nan-Kang, Taipei, 11529, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No.128, Academia Road Section2, Nan-Kang, Taipei, 11529, Taiwan.,Graduate Institute of Biotechnology and Biotechnology Center, National Chung-Hsing University, Taichung, 40227, Taiwan.,Department of Chemistry and Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - Kwok-Kong Tony Mong
- Applied Chemistry Department, National Yang Ming Chiao Tung University (Previously National Chiao Tung University), 1001, University Road, Hsinchu City, Taiwan, R. O. C
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2
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Abstract
This review highlights the hydroelementation reactions of conjugated and separated diynes, which depending on the process conditions, catalytic system, as well as the type of reagents, leads to the formation of various products: enynes, dienes, allenes, polymers, or cyclic compounds. The presence of two triple bonds in the diyne structure makes these compounds important reagents but selective product formation is often difficult owing to problems associated with maintaining appropriate reaction regio- and stereoselectivity. Herein we review this topic to gain knowledge on the reactivity of diynes and to systematise the range of information relating to their use in hydroelementation reactions. The review is divided according to the addition of the E-H (E = Mg, B, Al, Si, Ge, Sn, N, P, O, S, Se, Te) bond to the triple bond(s) in the diyne, as well as to the type of the reagent used, and the product formed. Not only are the hydroelementation reactions comprehensively discussed, but the synthetic potential of the obtained products is also presented. The majority of published research is included within this review, illustrating the potential as well as limitations of these processes, with the intent to showcase the power of these transformations and the obtained products in synthesis and materials chemistry.
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Affiliation(s)
- Jędrzej Walkowiak
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan.
| | - Jakub Szyling
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan. .,Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznanskiego 8, 61-614, Poznan, Poland
| | - Adrian Franczyk
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan.
| | - Rebecca L Melen
- Cardiff Catalysis Institute, Cardiff University, School of Chemistry, Park Place, Main Building, Cardiff CF10 3AT, Cymru/Wales, UK.
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3
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Gaikwad SV, Gaikwad MV, Lokhande PD. Iodine‐DMSO
catalyzed chemoselective oxidative aromatization and deallylation, nondeallylation of aryl allyl ether of tetrahydro‐
β
‐carboline. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sunil V. Gaikwad
- Department of Chemistry, Centre for Advanced Research Savitribai Phule Pune University Pune India
| | - Milind V. Gaikwad
- Department of Chemistry, Dr. D. Y. Patil A.C.S. College Pimpri Savitribai Phule Pune University Pune India
| | - Pradeep D. Lokhande
- Department of Chemistry, Centre for Advanced Research Savitribai Phule Pune University Pune India
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4
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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: 12] [Impact Index Per Article: 3.0] [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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5
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Arndt S, Weis D, Donsbach K, Waldvogel SR. The "Green" Electrochemical Synthesis of Periodate. Angew Chem Int Ed Engl 2020; 59:8036-8041. [PMID: 32181555 PMCID: PMC7317427 DOI: 10.1002/anie.202002717] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Indexed: 01/03/2023]
Abstract
High-grade periodate is relatively expensive, but is required for many sensitive applications such as the synthesis of active pharmaceutical ingredients. These high costs originate from using lead dioxide anodes in contemporary electrochemical methods and from expensive starting materials. A direct and cost-efficient electrochemical synthesis of periodate from iodide, which is less costly and relies on a readily available starting material, is reported. The oxidation is conducted at boron-doped diamond anodes, which are durable, metal-free, and nontoxic. The avoidance of lead dioxide ultimately lowers the cost of purification and quality assurance. The electrolytic process was optimized by statistical methods and was scaled up in an electrolysis flow cell that enhanced the space-time yields by a cyclization protocol. An LC-PDA analytical protocol was established enabling simple quantification of iodide, iodate, and periodate simultaneously with remarkable precision.
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Affiliation(s)
- Sebastian Arndt
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Dominik Weis
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Kai Donsbach
- PharmaZell GmbH, Hochstrass-Süd 7, 83064, Raubling, Germany
| | - Siegfried R Waldvogel
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
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6
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Arndt S, Weis D, Donsbach K, Waldvogel SR. Die “grüne” elektrochemische Synthese von Periodat. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002717] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sebastian Arndt
- Department of ChemistryJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Deutschland
| | - Dominik Weis
- Department of ChemistryJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Deutschland
| | - Kai Donsbach
- PharmaZell GmbH Hochstraß Süd 7 83064 Raubling Deutschland
| | - Siegfried R. Waldvogel
- Department of ChemistryJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Deutschland
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7
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Nickel-Catalyzed Removal of Alkene Protecting Group of Phenols, Alcohols via Chain Walking Process. Molecules 2020; 25:molecules25030602. [PMID: 32019185 PMCID: PMC7037277 DOI: 10.3390/molecules25030602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/25/2020] [Accepted: 01/28/2020] [Indexed: 11/23/2022] Open
Abstract
An efficient nickel-catalyzed removal of alkene protection group under mild condition with high functional group tolerance through chain walking process has been established. Not only phenolic ethers, but also alcoholic ethers can be tolerated with the retention of stereocenter adjacent to hydroxyl group. The new reaction brings the homoallyl group into a start of new type of protecting group.
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8
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Patil AM, Kamble DA, Lokhande PD. A Metal-Free Iodination of Aryl Ethers and Phenols Using I2. ChemistrySelect 2017. [DOI: 10.1002/slct.201701645] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Avinash M. Patil
- Center for Advance Studies; Department of Chemistry; Savitribai Phule Pune University (Formerly University of Pune); Pune-411007 India
| | - Dayanand A. Kamble
- Center for Advance Studies; Department of Chemistry; Savitribai Phule Pune University (Formerly University of Pune); Pune-411007 India
| | - Pradeep D. Lokhande
- Center for Advance Studies; Department of Chemistry; Savitribai Phule Pune University (Formerly University of Pune); Pune-411007 India
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9
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Sriram YH, Fatima T, Rajanna KC, Kumar MS, Raju RM. Potassium Periodate/NaNO2
/KHSO4
-Mediated Nitration of Aromatic Compounds and Kinetic Study of Nitration of Phenols in Aqueous Acetonitrile. INT J CHEM KINET 2017. [DOI: 10.1002/kin.21102] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Y. Hemanth Sriram
- Department of Chemistry; Osmania University; Hyderabad 500 007 India
| | - Touheeth Fatima
- Department of Chemistry; Osmania University; Hyderabad 500 007 India
| | - K. C. Rajanna
- Department of Chemistry; Osmania University; Hyderabad 500 007 India
| | - M. Satish Kumar
- Department of Chemistry; Osmania University; Hyderabad 500 007 India
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10
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Lo Re D, Jones L, Giralt E, Murphy P. Synthesis of an Orthogonally Protected Polyhydroxylated Cyclopentene from l-Sorbose. Chem Asian J 2016; 11:2035-40. [PMID: 27304425 DOI: 10.1002/asia.201600736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Indexed: 11/06/2022]
Abstract
The use of l-sorbose in the synthesis of functionalized cyclopentene derivatives was accomplished. These cyclopentene derivatives are related to those found in naturally occurring jatrophane frameworks and in other bioactive compounds. The formation of allyl α-l-sorbopyranoside was a key synthetic step. Regioselective introduction of protecting groups was followed by the hydrolysis of the allyl glycoside to furnish a fully protected acyclic l-sorbose derivative. This acyclic intermediate was subsequently used to give an orthogonally protected polyhydroxylated cyclopentene, which has potential for further synthesis of bioactive compounds. The protected cyclopentene itself showed a clear cytotoxic activity when tested against a panel of human cancer cell lines (HT29, LS174T, SW620, A549, and HeLa cells).
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Affiliation(s)
- Daniele Lo Re
- School of Chemistry, National University of Ireland, Galway, University Road, Galway, Ireland.
| | - Leigh Jones
- School of Chemistry, National University of Ireland, Galway, University Road, Galway, Ireland
| | - Ernest Giralt
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, C/Baldiri Reixac 10, Barcelona, E-08028, Spain.,Department of Organic Chemistry, University of Barcelona, Marti i Franques 1-11, Barcelona, E-08028, Spain
| | - Paul Murphy
- School of Chemistry, National University of Ireland, Galway, University Road, Galway, Ireland.
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11
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Wang W, Cencic R, Whitesell L, Pelletier J, Porco JA. Synthesis of Aza-Rocaglates via ESIPT-Mediated (3+2) Photocycloaddition. Chemistry 2016; 22:12006-10. [PMID: 27338157 DOI: 10.1002/chem.201602953] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Indexed: 12/16/2022]
Abstract
Synthesis of aza-rocaglates, nitrogen-containing analogues of the rocaglate natural products, is reported. The route features ESIPT-mediated (3+2) photocycloaddition of 1-alkyl-2-aryl-3-hydroxyquinolinones with the dipolarophile methyl cinnamate. A continuous photoflow reactor was utilized for photocycloadditions. An array of compounds bearing the hexahydrocyclopenta[b]indole core structure was synthesized and evaluated in translation inhibition assays.
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Affiliation(s)
- Wenyu Wang
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA
| | - Regina Cencic
- Department of Biochemistry and The Rosalind and Morris Goodman Cancer Research Centre Room 810, McGill University, 3655 Drummond St., Montreal, QC, H3G 1Y6, Canada
| | - Luke Whitesell
- Whitehead Institute for Biomedical Research (WIBR), Cambridge, MA, 02142, USA
| | - Jerry Pelletier
- Department of Biochemistry and The Rosalind and Morris Goodman Cancer Research Centre Room 810, McGill University, 3655 Drummond St., Montreal, QC, H3G 1Y6, Canada
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA.
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12
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Tanaka S, Suzuki Y, Saburi H, Kitamura M. Soft ruthenium and hard Brønsted acid combined catalyst for efficient cleavage of allyloxy bonds. Application to protecting group chemistry. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Kitamura M, Tanaka S, Yoshimura M. Donor-Acceptor Bifunctional Molecular Catalyst: Its Development, Application, and Analysis. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.690] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masato Kitamura
- Graduate School of Pharmaceutical Sciences, Nagoya University
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14
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Adak S, Emmadi M, Kulkarni SS. Synthesis of the trisaccharide moiety and a cholesteryl analog of phyteumosides. RSC Adv 2014. [DOI: 10.1039/c3ra47523a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Fer MJ, Olatunji S, Bouhss A, Calvet-Vitale S, Gravier-Pelletier C. Toward Analogues of MraY Natural Inhibitors: Synthesis of 5′-Triazole-Substituted-Aminoribosyl Uridines Through a Cu-Catalyzed Azide–Alkyne Cycloaddition. J Org Chem 2013; 78:10088-105. [DOI: 10.1021/jo4014035] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mickaël J. Fer
- Laboratoire de
Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, UMR 8601 CNRS, 45 rue des Saints Pères, 75006 Paris, France
| | - Samir Olatunji
- Laboratoire
des
Enveloppes Bactériennes et Antibiotiques, Institut de Biochimie
et Biophysique Moléculaire et Cellulaire, Université Paris-Sud 11, UMR 8619 CNRS, Orsay F-91405, France
| | - Ahmed Bouhss
- Laboratoire
des
Enveloppes Bactériennes et Antibiotiques, Institut de Biochimie
et Biophysique Moléculaire et Cellulaire, Université Paris-Sud 11, UMR 8619 CNRS, Orsay F-91405, France
| | - Sandrine Calvet-Vitale
- Laboratoire de
Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, UMR 8601 CNRS, 45 rue des Saints Pères, 75006 Paris, France
| | - Christine Gravier-Pelletier
- Laboratoire de
Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, UMR 8601 CNRS, 45 rue des Saints Pères, 75006 Paris, France
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16
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Gärtner D, Konnerth H, von Wangelin AJ. Highly practical iron-catalyzed C–O cleavage reactions. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00266g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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N-Benzyloxymalimide for an easy access to 5-alkyl-3-pyrrolin-2-ones: asymmetric synthesis of the mixed imide substructure of the potent immunosuppressant microcolin B. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.04.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Chen J, Huang PQ, Queneau Y. Enantioselective synthesis of the R-enantiomer of the feeding deterrent (S)-ypaoamide. J Org Chem 2009; 74:7457-63. [PMID: 19746925 DOI: 10.1021/jo901557h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantioselective synthesis of the R-enantiomer of the marine natural product (S)-ypaoamide (5) is reported. The synthesis features both a flexible racemization-free approach to the 5-substituted 3-pyrrolin-2-one segment, and a lipase (CCL)-promoted deacetylation reaction to reach the orthogonal deprotection. Through this work the absolute configuration of the natural ypaoamide was determined as S.
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Affiliation(s)
- Jie Chen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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19
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Pawar BV, Lokhande PD. Facile and Chemoselective Cleavage of Allyl Carboxylic Ester Utilizing NaBH4 in DMSO. SYNTHETIC COMMUN 2009. [DOI: 10.1080/00397910902963694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Bharati V. Pawar
- a Center for Advanced Studies, Department of Chemistry , University of Pune , Pune, India
| | - Pradeep D. Lokhande
- a Center for Advanced Studies, Department of Chemistry , University of Pune , Pune, India
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20
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Bernier D, Wefelscheid UK, Woodward S. Properties, Preparation and Synthetic Uses of AmineN-Oxides. An Update. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304940902955756] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Luo JM, Dai CF, Lin SY, Huang PQ. Asymmetric syntheses and Wnt signal inhibitory activity of melleumin A and four analogues of melleumins A and B. Chem Asian J 2009; 4:328-35. [PMID: 19072738 DOI: 10.1002/asia.200800355] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Guided by nature: A flexible and epimerization-free approach for the asymmetric syntheses of melleumin A and four analogues of melleumins A and B was developed, which allowed confirming the stereochemistry at C-4 of melleumin A, and revealed that the unnatural 4-epi-melleumin B possesses a modest inhibitory activity on Wnt signaling. The first total synthesis of melleumin A and four analogues of melleumins A and B is described. The N-acyl L-Thr-Gly/beta-hydroxy-gamma-amino acid coupling/macrolactamization strategy allowed the efficient assembly of the three segments being free of epimerization. While the Jouin-Castro method with minor modification allows a rapid entrance to the key syn-beta-hydroxy-gamma-amino acid segment, required for the synthesis of melleumin A, an extension of our malimide-based methodology using a changed N-protecting group affords a flexible access to several anti-beta-hydroxy-gamma-amino acids, and hence analogues of melleumins A and B. Among them, unnatural 4-epi-melleumin B (2 a) exhibits a modest inhibitory activity on Wnt signaling. The total synthesis of melleumin A allowed confirmation of its full structure.
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Affiliation(s)
- Jie-Min Luo
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
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22
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Kajihara K, Arisawa M, Shuto S. A Method for Cleaving an Allyl Protecting Group at the Amide Nitrogen of Peptides by One-Pot Olefin Isomerization−Oxidation. J Org Chem 2008; 73:9494-6. [DOI: 10.1021/jo801915c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kouki Kajihara
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812 Japan
| | - Mitsuhiro Arisawa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812 Japan
| | - Satoshi Shuto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo 060-0812 Japan
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23
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Mora G, Piechaczyk O, Le Goff XF, Le Floch P. Palladium-Catalyzed Deallylation of Allyl Ethers with a Xanthene Phosphole Ligand. Experimental and DFT Mechanistic Studies. Organometallics 2008. [DOI: 10.1021/om800051n] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guilhem Mora
- Laboratoire “Hétéroéléments et Coordination”, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
| | - Olivier Piechaczyk
- Laboratoire “Hétéroéléments et Coordination”, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
| | - Xavier F. Le Goff
- Laboratoire “Hétéroéléments et Coordination”, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
| | - Pascal Le Floch
- Laboratoire “Hétéroéléments et Coordination”, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
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24
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Tsukamoto H, Suzuki T, Sato M, Kondo Y. Chromatography-free Pd-catalyzed deprotection of allyl ethers using PS-DEAM as a scavenger of boronic acids and Pd catalyst. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Cadierno V, Gimeno J, Nebra N. Efficient Tandem Process for the Catalytic Deprotection of N-Allyl Amides and Lactams in Aqueous Media: A Novel Application of the Bis(allyl)–Ruthenium(IV) Catalysts [Ru(η3:η2:η3-C12H18)Cl2] and [{Ru(η3:η3-C10H16)(μ-Cl)Cl}2]. Chemistry 2007; 13:6590-4. [PMID: 17516612 DOI: 10.1002/chem.200700477] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An operationally simple and highly efficient methodology for the removal of the allyl protecting group in amides and lactams has been developed by using the commercially available bis(allyl)-ruthenium(IV) catalysts [Ru(eta(3):eta(2):eta(3)-C(12)H(18))Cl(2)] (C(12)H(18)=dodeca-2,6,10-triene-1,12-diyl) and [{Ru(eta(3):eta(3)-C(10)H(16))(micro-Cl)Cl}(2)] (C(10)H(16)=2,7-dimethylocta-2,6-diene-1,8-diyl). The tandem process, which takes place in aqueous media and proceeds in a one-pot manner, involves the initial isomerization of the C=C bond of the allyl unit and subsequent oxidative cleavage of the resulting enamide.
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Affiliation(s)
- Victorio Cadierno
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica, Enrique Moles (Unidad Asociada al CSIC), Universidad de Oviedo, Julián Clavería 8, E-33006 Oviedo, Spain.
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Abstract
A convenient one-step RhCl3-catalyzed deprotection of acyclic N-allyl amides is described. Preliminary mechanistic studies reveal that the key to the success of the one-step deprotection process is the dual function of RhCl3 in alcohol solvents. Reaction of RhCl3 with n-PrOH not only provides an active rhodium hydride species to catalyze isomerization of N-allyl amides to corresponding enamides but also generates a crucial catalytic amount of HCl to convert the enamides to deallylated amides through N,O-acetal exchange.
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Affiliation(s)
- Michael J Zacuto
- Department of Process Research, Merck Research Laboratory, Rahway, NJ 07065, USA.
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Tanaka S, Saburi H, Kitamura M. [CpRu(IV)(π-C3H5)(2-quinolinecarboxylato)]PF6 Complex: A Robust Catalyst for the Cleavage and Formation of Allyl Ethers. Adv Synth Catal 2006. [DOI: 10.1002/adsc.200505401] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Escoubet S, Gastaldi S, Bertrand M. Methods for the Cleavage of Allylic and Propargylic C–N Bonds in Amines and Amides – Selected Alternative Applications of the 1,3‐Hydrogen Shift. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500204] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Stéphanie Escoubet
- Laboratoire de Chimie Moléculaire Organique, UMR 6517, Boite 562, Faculté des Sciences St Jérôme, Université Paul Cézanne (Aix‐Marseille III), Av. Normandie‐Niemen, 13397 Marseille Cedex 20, France
| | - Stéphane Gastaldi
- Laboratoire de Chimie Moléculaire Organique, UMR 6517, Boite 562, Faculté des Sciences St Jérôme, Université Paul Cézanne (Aix‐Marseille III), Av. Normandie‐Niemen, 13397 Marseille Cedex 20, France
| | - Michèle Bertrand
- Laboratoire de Chimie Moléculaire Organique, UMR 6517, Boite 562, Faculté des Sciences St Jérôme, Université Paul Cézanne (Aix‐Marseille III), Av. Normandie‐Niemen, 13397 Marseille Cedex 20, France
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Janssen S, Schmidt RR. Synthesis of Ganglioside Mimics for Binding Studies with Myelin‐Associated Glycoprotein (MAG)*. J Carbohydr Chem 2005. [DOI: 10.1080/07328300500176312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Plietker B. The RuO4-Catalyzed Ketohydroxylation, Part II:A Regio-, Chemo- and Stereoselectivity Study. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400898] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Clement EC, Carlier PR. A simple route to tetrahydro-1,4-benzodiazepin-3-ones bearing diverse N1, N4, and C10 functionalization. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.03.171] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dimethylsulfoxide–iodine catalysed deprotection of 2′-allyloxychalcones: synthesis of flavones. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.12.041] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Cadierno V, García-Garrido SE, Gimeno J, Nebra N. Ru(iv)-catalyzed isomerization of allylamines in water: A highly efficient procedure for the deprotection of N-allylic amines. Chem Commun (Camb) 2005:4086-8. [PMID: 16091808 DOI: 10.1039/b506788j] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general and efficient method for the deprotection of N-allylic substrates in aqueous media, using catalytic amounts of the bis(allyl)-ruthenium(IV) complexes [Ru(eta3:eta2:eta3-C12H18)Cl2] and [{Ru(eta3:eta3-C10H16)(micro-Cl)Cl}2], has been developed.
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Affiliation(s)
- Victorio Cadierno
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica Enrique Moles (Unidad Asociada al C.S.I.C.), Universidad de Oviedo, 33071, Oviedo, Spain.
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Tanaka S, Saburi H, Ishibashi Y, Kitamura M. CpRuIIPF6/quinaldic acid-catalyzed chemoselective allyl ether cleavage. A simple and practical method for hydroxyl deprotection. Org Lett 2004; 6:1873-5. [PMID: 15151436 DOI: 10.1021/ol0493397] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cationic CpRu(II) complex in combination with quinaldic acid shows high reactivity and chemoselectivity for the catalytic deprotection of hydroxyl groups protected as allyl ethers. The catalyst operates in alcoholic solvents without the need for any additional nucleophiles, satisfying the practical requirements of operational simplicity, safety, and environmental friendliness. The wide applicability of this deprotection strategy to a variety of multifunctional molecules, including peptides and nucleosides, may provide new opportunities in protective group chemistry. [structure: see text]
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Affiliation(s)
- Shinji Tanaka
- Research Center for Materials Science and Department of Chemistry, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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Cadot C, Dalko PI, Cossy J. Olefin isomerization by a ruthenium carbenoid complex. Cleavage of allyl and homoallyl groups. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00141-7] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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