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Eskici M, Karanfil A. Stereoselective synthesis of cis-2,6-disubstituted piperidines from 1,2-cyclic sulfamidates. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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2
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Ho HE, James MJ, O’Brien P, Taylor RJK, Unsworth WP. Ag(I)-Catalyzed Synthesis of Azabicyclic Alkaloid Frameworks from Ketimine-Tethered Ynones: Total Synthesis of Indolizidine 209D. Org Lett 2018; 20:1439-1443. [DOI: 10.1021/acs.orglett.8b00225] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hon Eong Ho
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
| | - Michael J. James
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
| | - Peter O’Brien
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
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3
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Yang Y, Hardman C. Synthetic versatility of 2-substituted-6-methyl 2,3-dihydropyridinones in the synthesis of polyfunctional piperidine-based compounds and related β amino acid derivatives. Org Biomol Chem 2017; 15:8576-8593. [PMID: 28975943 DOI: 10.1039/c7ob01948c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral 2-substituted-6-methyl 2,3-dihydropyidinones 9, which can be facilely obtained from an asymmetric vinylogous Mannich reaction (VMR) with 1,3-bis-trimethysily enol ether, were used as versatile intermediates in constructing chiral polyfunctional piperidine-based compounds. The 6-methyl group of such compounds can be conveniently functionalized via alkylation and acylation reactions to provide efficient entries to the synthesis of a variety of chiral multi-substituted piperidine-based compounds. Further elaboration of the corresponding intermediates also provided access to polyfunctional indolizidine-based compounds. These methods were showcased in an asymmetric synthesis of 2,6-di-substituted piperidine compound 13, reported as the key intermediate in the synthesis of (+)-calvine and a natural alkaloid (-)-indolizidine 209D. Furthermore, selective C5 iodination of compound 9 enabled the installation of additional functional groups at this position. Finally, we demonstrated that the oxidative cleavage of 2-substituted-6-methyl-2,3-dihydropyidinones is a practical and efficient method for the enantioselective synthesis of β-amino acids, which can undergo further intra-molecular cyclization to give the corresponding chiral four-membered β-lactam derivatives.
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Affiliation(s)
- Yang Yang
- Genomics Institute of the Novartis Research Foundation, 10675 John Jay Hopkins Drive, San Diego, California 92121, USA.
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4
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Liu C, Wang X, Li Z, Cui L, Li C. Silver-Catalyzed Decarboxylative Radical Azidation of Aliphatic Carboxylic Acids in Aqueous Solution. J Am Chem Soc 2015. [DOI: 10.1021/jacs.5b06821] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Chao Liu
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation
Center of Chemistry for Life Sciences, Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Xiaoqing Wang
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation
Center of Chemistry for Life Sciences, Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Zhaodong Li
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation
Center of Chemistry for Life Sciences, Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Lei Cui
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation
Center of Chemistry for Life Sciences, Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation
Center of Chemistry for Life Sciences, Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
- School of Chemical Engineering, Ningbo University of Technology, No. 89 Cuibai Road, Ningbo 315016, P. R. China
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5
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Abstract
The first total synthesis of amphirionin-4 has been achieved using a combination of cross-coupling strategies to access the polyene side chain and a chlorohydrin-based approach to construct the tetrahydrofuranol core. The remote C9-stereocenter was introduced through a Nozaki-Hiyama-Kishi coupling that proceeded with remote stereoinduction.
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Affiliation(s)
- Michael Holmes
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Daniel Kwon
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Matthew Taron
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Robert Britton
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
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Abstract
This review of simple indolizidine and quinolizidine alkaloids (i.e., those in which the parent bicyclic systems are in general not embedded in polycyclic arrays) is an update of the previous coverage in Volume 55 of this series (2001). The present survey covers the literature from mid-1999 to the end of 2013; and in addition to aspects of the isolation, characterization, and biological activity of the alkaloids, much emphasis is placed on their total synthesis. A brief introduction to the topic is followed by an overview of relevant alkaloids from fungal and microbial sources, among them slaframine, cyclizidine, Steptomyces metabolites, and the pantocins. The important iminosugar alkaloids lentiginosine, steviamine, swainsonine, castanospermine, and related hydroxyindolizidines are dealt with in the subsequent section. The fourth and fifth sections cover metabolites from terrestrial plants. Pertinent plant alkaloids bearing alkyl, functionalized alkyl or alkenyl substituents include dendroprimine, anibamine, simple alkaloids belonging to the genera Prosopis, Elaeocarpus, Lycopodium, and Poranthera, and bicyclic alkaloids of the lupin family. Plant alkaloids bearing aryl or heteroaryl substituents include ipalbidine and analogs, secophenanthroindolizidine and secophenanthroquinolizidine alkaloids (among them septicine, julandine, and analogs), ficuseptine, lasubines, and other simple quinolizidines of the Lythraceae, the simple furyl-substituted Nuphar alkaloids, and a mixed quinolizidine-quinazoline alkaloid. The penultimate section of the review deals with the sizable group of simple indolizidine and quinolizidine alkaloids isolated from, or detected in, ants, mites, and terrestrial amphibians, and includes an overview of the "dietary hypothesis" for the origin of the amphibian metabolites. The final section surveys relevant alkaloids from marine sources, and includes clathryimines and analogs, stellettamides, the clavepictines and pictamine, and bis(quinolizidine) alkaloids.
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7
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Zhang G, Gong X, Yang S, Sun B, Liu Y, Tian H. Preparation and odour properties of the four stereoisomers of 2-hexyl-4-acetoxytetrahydrofuran. FLAVOUR FRAG J 2014. [DOI: 10.1002/ffj.3202] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guoying Zhang
- School of Food Chemistry, Beijing Key Laboratory of Flavor Chemistry; Beijing Technology and Business University; Beijing 100048 China
| | - Xiuqin Gong
- School of Food Chemistry, Beijing Key Laboratory of Flavor Chemistry; Beijing Technology and Business University; Beijing 100048 China
| | - Shaoxiang Yang
- School of Food Chemistry, Beijing Key Laboratory of Flavor Chemistry; Beijing Technology and Business University; Beijing 100048 China
| | - Baoguo Sun
- School of Food Chemistry, Beijing Key Laboratory of Flavor Chemistry; Beijing Technology and Business University; Beijing 100048 China
| | - Yongguo Liu
- School of Food Chemistry, Beijing Key Laboratory of Flavor Chemistry; Beijing Technology and Business University; Beijing 100048 China
| | - Hongyu Tian
- School of Food Chemistry, Beijing Key Laboratory of Flavor Chemistry; Beijing Technology and Business University; Beijing 100048 China
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8
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Denmark SE, Jaunet A. Catalytic, enantioselective, intramolecular carbosulfenylation of olefins. Preparative and stereochemical aspects. J Org Chem 2014; 79:140-71. [PMID: 24328051 PMCID: PMC3913010 DOI: 10.1021/jo4023765] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first catalytic, enantioselective, intramolecular carbosulfenylation of isolated alkenes with aromatic nucleophiles is described. The combination of N-phenylsulfenylphthalimide, a chiral selenophosphoramide derived from BINAM, and ethanesulfonic acid as a cocatalytic Brønsted acid induced an efficient and selective cyclofunctionalization of various alkenes (aliphatic and aromatic) tethered to a 3,4-methylenedioxyphenyl ring. Under these conditions, 6-phenylthio-5,6,7,8-tetrahydronaphthalenes are formed diastereospecifically in good yields (50-92%) and high enantioselectivities (71:29-97:3 er). E-Alkenes reacted much more rapidly and with much higher selectivity than Z-alkenes, whereas electron-rich alkenes reacted more rapidly but with comparable selectivity to electron-neutral alkenes and electron-deficient alkenes. The Brønsted acid played a critical role in effecting reproducible enantioselectivity. A model for the origin of enantioselectivity and the dependence of rate and selectivity on alkene structure is proposed along with a rationale for the site selectivity in reactions with monoactivated arene nucleophiles.
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Affiliation(s)
- Scott E. Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, IL 61801
| | - Alex Jaunet
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, IL 61801
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9
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Mahajan A, Hans R, Chibale K, Kumar V. Synthesis and medicinal chemistry of selected antitubercular natural products and natural product derivatives. RSC Adv 2014. [DOI: 10.1039/c3ra46124f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Saikia AK, Indukuri K, Das J. Stereoselective synthesis of O-tosyl azabicyclic derivatives via aza Prins reaction of endocyclic N-acyliminium ions: application to the total synthesis of (±)-epi-indolizidine 167B and 209D. Org Biomol Chem 2014; 12:7026-35. [DOI: 10.1039/c4ob01130a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A diastereoselective synthesis of 4-O-tosyl piperidine containing azabicyclic derivatives has been established via Prins cyclization reaction. This protocol has been applied for the total synthesis of (±)-epi-indolizidine 167B and 209D.
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Affiliation(s)
- Anil K. Saikia
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
| | - Kiran Indukuri
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
| | - Jagadish Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039, India
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11
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Jäkel M, Qu J, Schnitzer T, Helmchen G. Addition of Organometallic Reagents to ChiralN‐Methoxylactams: Enantioselective Syntheses of Pyrrolidines and Piperidines. Chemistry 2013; 19:16746-55. [DOI: 10.1002/chem.201302735] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Mascha Jäkel
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Jianping Qu
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Tobias Schnitzer
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Günter Helmchen
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
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12
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Chiral synthesis of indolizidines 209D and 167B via asymmetric oxidation of sulfides and sulfoxides. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Enantioselective access to (−)-indolizidines 167B, 209D, 239AB, 195B and (−)-monomorine from a common chiral synthon. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.076] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Chandrasekhar B, Prasada Rao J, Venkateswara Rao B, Naresh P. [2,3]-Wittig rearrangement approach to iminosugar C-glycosides: 5-epi-ethylfagomine, 2-epi-5-deoxyadenophorine and formal synthesis of indolizidine 167B and 209D. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.084] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Gracia S, Jerpan R, Pellet-Rostaing S, Popowycz F, Lemaire M. Straightforward synthesis of indolizidine alkaloid 167B. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.09.105] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Liu H, Su D, Cheng G, Xu J, Wang X, Hu Y. Enantiopure 2,6-disubstituted piperidines bearing one alkene- or alkyne-containing substituent: preparation and application to total syntheses of indolizidine-alkaloids. Org Biomol Chem 2010; 8:1899-904. [DOI: 10.1039/b927007h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Dalton DM, Oberg KM, Yu RT, Lee EE, Perreault S, Oinen ME, Pease ML, Malik G, Rovis T. Enantioselective rhodium-catalyzed [2 + 2 + 2] cycloadditions of terminal alkynes and alkenyl isocyanates: mechanistic insights lead to a unified model that rationalizes product selectivity. J Am Chem Soc 2009; 131:15717-28. [PMID: 19817441 PMCID: PMC2796191 DOI: 10.1021/ja905065j] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This manuscript describes the development and scope of the asymmetric rhodium-catalyzed [2 + 2 + 2] cycloaddition of terminal alkynes and alkenyl isocyanates leading to the formation of indolizidine and quinolizidine scaffolds. The use of phosphoramidite ligands proved crucial for avoiding competitive terminal alkyne dimerization. Both aliphatic and aromatic terminal alkynes participate well, with product selectivity a function of both the steric and electronic character of the alkyne. Manipulation of the phosphoramidite ligand leads to tuning of enantio- and product selectivity, with a complete turnover in product selectivity seen with aliphatic alkynes when moving from Taddol-based to biphenol-based phosphoramidites. Terminal and 1,1-disubstituted olefins are tolerated with nearly equal efficacy. Examination of a series of competition experiments in combination with analysis of reaction outcome shed considerable light on the operative catalytic cycle. Through a detailed study of a series of X-ray structures of rhodium(cod)chloride/phosphoramidite complexes, we have formulated a mechanistic hypothesis that rationalizes the observed product selectivity.
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Affiliation(s)
- Derek M. Dalton
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Kevin M. Oberg
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Robert T. Yu
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Ernest E. Lee
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Stéphane Perreault
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Mark Emil Oinen
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Melissa L. Pease
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Guillaume Malik
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
| | - Tomislav Rovis
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523
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Yu RT, Lee EE, Malik G, Rovis T. Total synthesis of indolizidine alkaloid (-)-209D: overriding substrate bias in the asymmetric rhodium-catalyzed [2+2+2] cycloaddition. Angew Chem Int Ed Engl 2009; 48:2379-82. [PMID: 19229912 DOI: 10.1002/anie.200805455] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CO! You had me at hello: The use of chiral biphenyl-based phosphoramidite ligands on rhodium provides an efficient [2+2+2] cycloaddition between terminal alkyl alkynes and alkenyl isocyanates (see scheme). The cycloaddition proceeds through a CO migration pathway, and facilitates a rapid four-step asymmetric synthesis of indolizidine (-)-209D.
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Affiliation(s)
- Robert T Yu
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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19
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Yu R, Lee E, Malik G, Rovis T. Total Synthesis of Indolizidine Alkaloid (−)-209D: Overriding Substrate Bias in the Asymmetric Rhodium-Catalyzed [2+2+2] Cycloaddition. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805455] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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20
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21
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Concise syntheses of substituted indolizidine alkaloids via cyclization based on α-sulfinyl carbanions: preparation of (±)-indolizidines 167B and 209D, their epimers, and (±)-tashiromine. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Etxebarria J, Vicario JL, Badía D, Carrillo L. A general and enantiodivergent method for the asymmetric synthesis of piperidine alkaloids: concise synthesis of (R)-pipecoline, (S)-coniine and other 2-alkylpiperidines. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.067] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Hu MG, An ZW, Du WS, Li J, Gao AA. Highly Efficient Pd/C-Catalyzed Suzuki Coupling Reaction ofp-(un)Substituted Phenyl Halide with (p-Substituted phenyl) Boronic Acid. CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790220] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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Kim P, Zhang YM, Shenoy G, Nguyen QA, Boshoff HI, Manjunatha UH, Goodwin MB, Lonsdale J, Price AC, Miller DJ, Duncan K, White SW, Rock CO, Barry CE, Dowd CS. Structure-activity relationships at the 5-position of thiolactomycin: an intact (5R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherichia coli. J Med Chem 2006; 49:159-71. [PMID: 16392800 PMCID: PMC1462948 DOI: 10.1021/jm050825p] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thiolactomycin inhibits bacterial cell growth through inhibition of the beta-ketoacyl-ACP synthase activity of type II fatty acid synthases. The effect of modifications of the 5-position isoprenoid side chain on both IC(50) and MIC were determined. Synthesis and screening of a structurally diverse set of 5-position analogues revealed very little tolerance for substitution in purified enzyme assays, but a few analogues retained MIC, presumably through another target. Even subtle modifications such as reducing one or both double bonds of the diene were not tolerated. The only permissible structural modifications were removal of the isoprene methyl group or addition of a methyl group to the terminus. Cocrystallization of these two inhibitors with the condensing enzyme from Escherichia coli revealed that they retained the TLM binding mode at the active site with reduced affinity. These results suggest a strict requirement for a conjugated, planar side chain inserting within the condensing enzyme active site.
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Affiliation(s)
- Pilho Kim
- Tuberculosis Research Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852, USA
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The enantioselective synthesis of poison-frog alkaloids (−)-203A, (−)-209B, (−)-231C, (−)-233D, and (−)-235B″. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.11.047] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Reddy PG, Sankar MG, Baskaran S. An unusual solvent effect in the cuprate displacement reaction of indolizidin-5-yl-methyl p-toluenesulfonate: stereoselective synthesis of indolizidine alkaloids. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Patil NT, Pahadi NK, Yamamoto Y. A new route for the synthesis of indolizidine (−)-209D: excellent diastereoselectivity in the intramolecular hydroamination of alkynes. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.01.139] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Stereoselective synthesis of substituted N-heterocycles via sequential cross metathesis—reductive cyclization. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.11.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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29
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Affiliation(s)
- Joseph P Michael
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Wits, 2050, South Africa.
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30
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31
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Asymmetric Synthesis of (-)-Indolizidine 209D via B-Alkyl Suzuki Coupling and Amination Reactions. B KOREAN CHEM SOC 2003. [DOI: 10.5012/bkcs.2003.24.12.1832] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Settambolo R, Guazzelli G, Mengali L, Mandoli A, Lazzaroni R. A new class of optically active pyrrole derivatives: (3R)-3-(pyrrol-1-yl)alk-1-enes from d-α-aminoacids. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0957-4166(03)00524-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Kim G, Jung SD, Lee EJ, Kim N. One-pot hydrogenation conditions for a sequential process to (+)-monomorine. J Org Chem 2003; 68:5395-8. [PMID: 12816507 DOI: 10.1021/jo030083c] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
(+)-Monomorine has been synthesized under mild hydrogenation conditions initiating deprotection followed by intramolecular, sequential reductive amination reactions. The precursors could be prepared concisely using B-alkyl Suzuki cross coupling of a chiral homoallylamine and a vinyl iodide or an iodofuran derivative.
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Affiliation(s)
- Guncheol Kim
- Department of Chemistry, College of Natural Science, Chungnam National University, Taejon 305-764, Korea.
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34
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Weintraub PM, Sabol JS, Kane JM, Borcherding DR. Recent advances in the synthesis of piperidones and piperidines. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00295-3] [Citation(s) in RCA: 320] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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35
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Toyooka N, Nemoto H. First enantioselective synthesis of (+)-quinolizidine : determination of the absolute stereochemistry. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02540-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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