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Smith BP, Truax NJ, Pollatos AS, Meanwell M, Bedekar P, Garrido-Castro AF, Baran PS. Total Synthesis of Dragocins A-C through Electrochemical Cyclization. Angew Chem Int Ed Engl 2024; 63:e202401107. [PMID: 38358802 DOI: 10.1002/anie.202401107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/16/2024]
Abstract
The first total synthesis of dragocins A-C, remarkable natural products containing an unusual C4' oxidized ribose architecture bridged by a polyhydroxylated pyrrolidine, is presented through a route featuring a number of uncommon maneuvers. Several generations towards the target molecules are presented, including the spectacular failure of a key C-H oxidation on a late-stage intermediate. The final route features rapid, stereocontrolled access to a densely functionalized pyrrolidine and an unprecedented diastereoselective oxidative electrochemical cyclization to forge the hallmark 9-membered ring. Preliminary studies suggest this electrochemical oxidation protocol is generally useful.
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Affiliation(s)
- Brendyn P Smith
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Nathanyal J Truax
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Alexandros S Pollatos
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Michael Meanwell
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Dr NW, Edmonton, AB T6G 2N4, Canada
| | - Pranali Bedekar
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Alberto F Garrido-Castro
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093, Zürich, Switzerland
| | - Phil S Baran
- Department of Chemistry, Scripps Research, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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2
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Park S, Myeong IS, Ham WH. Recent advances in the total synthesis of polyhydroxylated alkaloids via chiral oxazines. Org Biomol Chem 2024; 22:894-926. [PMID: 38230703 DOI: 10.1039/d3ob01624b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
This review summarizes recently established methodologies developed for the enantioselective and diastereoselective synthesis of chiral 1,3-oxazines. These compounds are of interest as advanced synthetic intermediates in the total synthesis of structurally complex and biologically active polyhydroxylated alkaloids such as (+)-1-deoxynojirimycin, (-)-anisomycin, (+)-castanospermine, (+)-casuarine, (-)-conduramine F-1, (-)-sphingofungin B, Neu5Ac methyl ester, and other natural products. The devised synthetic approach aims to offer a direct, efficient, and adaptable method for obtaining both pure enantiomers and pure diastereomers. It revolves around utilizing chiral building blocks like syn,syn-, syn,syn,anti-, syn,anti-, syn,anti,syn-, anti,syn-, anti,syn,syn-, and anti,syn,anti-oxazines. By integrating oxazine chemistry with established and innovative transformations, this approach enabled the synthesis of 30 polyhydroxylated amines across various studies conducted between 2007 and 2022.
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Affiliation(s)
- Seokhwi Park
- YS Life Science Co., Ltd, 207, Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, 18581, Republic of Korea.
| | - In-Soo Myeong
- College of Pharmacy, Daegu Catholic University, 13-13, Hayang-ro, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38430, Republic of Korea.
| | - Won-Hun Ham
- YS Life Science Co., Ltd, 207, Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, 18581, Republic of Korea.
- School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Suwon-si, Gyeonggi-do, 16419, Republic of Korea
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3
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Man Y, Fu S, Chen J, Liu B. Total synthesis and structural revision of an isopanepoxydone analog isolated from Lentinus strigellus. Org Biomol Chem 2018; 16:5043-5049. [DOI: 10.1039/c8ob01168k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Asymmetric total synthesis of compound 1, as a proposed molecular structure of a natural product, in 11 steps is described. The inconsistency of the characterization data prompted us to propose a different structure as compound 2 and accordingly accomplish total synthesis in 9 steps and confirm the structural revision of this natural product.
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Affiliation(s)
- Yi Man
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Juan Chen
- Analytical & Testing Center
- Sichuan University
- Chengdu
- China
| | - Bo Liu
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
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4
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Wang W, He Q, Fan R. PhI(OAc) 2-mediated dialkoxylation of 4-aminostyrenes through a dearomatization process under metal-free conditions. Org Chem Front 2017. [DOI: 10.1039/c7qo00545h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A PhI(OAc)2-mediated dialkoxylation of 4-aminostyrenes has been developed to afford 2,3-disubstituted 1,4-dioxane or 1,2-dimethoxyethane derivatives.
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Affiliation(s)
- Weiyi Wang
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Qiuqin He
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Renhua Fan
- Department of Chemistry
- Fudan University
- Shanghai
- China
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5
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Rawling MJ, Rowley JH, Campbell M, Kennedy AR, Parkinson JA, Tomkinson NCO. Mechanistic insights into the malonoyl peroxide syn-dihydroxylation of alkenes. Chem Sci 2014. [DOI: 10.1039/c3sc53256a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
A detailed mechanistic understanding of the malonoyl peroxide mediated dihydroxylation of alkenes is presented.
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Affiliation(s)
- Michael J. Rawling
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Julian H. Rowley
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | | | - Alan R. Kennedy
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - John A. Parkinson
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
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6
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Zeng J, Zhang Q, Zhang HK, Chen A. Practical synthesis of trans-dihydroxybutyrolactols as chiral C4 building blocks and their application to the synthesis of polyhydroxylated alkaloids. RSC Adv 2013. [DOI: 10.1039/c3ra43232g] [Citation(s) in RCA: 9] [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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8
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Kondo Y, Suzuki N, Takahashi M, Kumamoto T, Masu H, Ishikawa T. Enantioselective Construction of a Polyhydroxylated Pyrrolidine Skeleton from 3-Vinylaziridine-2-carboxylates: Synthesis of (+)-DMDP and a Potential Common Intermediate for (+)-Hyacinthacine A1and (+)-1-epi-Australine. J Org Chem 2012; 77:7988-99. [DOI: 10.1021/jo301178b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yukari Kondo
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo, Chiba 260-8675, Japan
| | - Noriyuki Suzuki
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo, Chiba 260-8675, Japan
| | - Masato Takahashi
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo, Chiba 260-8675, Japan
| | - Takuya Kumamoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo, Chiba 260-8675, Japan
| | - Hyuma Masu
- Chemical Analysis Center, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Tsutomu Ishikawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo, Chiba 260-8675, Japan
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Abstract
The 1,2-diamine moiety is a ubiquitous structural motif present in a wealth of natural products, including non-proteinogenic amino acids and numerous alkaloids, as well as in pharmaceutical agents, chiral ligands and organic reagents. The biological activity associated with many of these systems and their chemical utility in general has ensured that the development of methods for their preparation is of critical importance. While a wide range of strategies for the preparation of 1,2-diamines have been established, the diamination of alkenes offers a particularly direct and efficient means of accessing these systems. The purpose of this review is to provide an overview of all methods of direct alkene diamination, metal-mediated or otherwise.
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Affiliation(s)
- Sam de Jong
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607-7061 USA
| | - Daniel G. Nosal
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607-7061 USA
| | - Duncan J. Wardrop
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607-7061 USA
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10
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11
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Detz RJ, Abiri Z, le Griel R, Hiemstra H, van Maarseveen JH. Enantioselective Copper-Catalysed Propargylic Substitution: Synthetic Scope Study and Application in Formal Total Syntheses of (+)-Anisomycin and (−)-Cytoxazone. Chemistry 2011; 17:5921-30. [DOI: 10.1002/chem.201003727] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Indexed: 11/09/2022]
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12
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Kotian PL, Ghosh A, Lin TH, Wu M, Satish Kumar V, Babu YS, Chand P. Synthetic approaches to imino sugar (2R,3R,4S)-2-(hydroxymethyl)-4-methylpyrrolidine-3,4-diol from naturally occurring sugar and amino acid. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.11.068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Reddy KS, Rao BV. A facile and stereoselective synthesis of the C-2 epimer of (+)-deacetylanisomycin. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Fujita M, Wakita M, Sugimura T. Enantioselective Prévost and Woodward reactions using chiral hypervalent iodine(iii): switchover of stereochemical course of an optically active 1,3-dioxolan-2-yl cation. Chem Commun (Camb) 2011; 47:3983-5. [DOI: 10.1039/c1cc10129c] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Karppanen EJ, Koskinen AMP. The 9-phenyl-9-fluorenyl group for nitrogen protection in enantiospecific synthesis. Molecules 2010; 15:6512-47. [PMID: 20877241 PMCID: PMC6257761 DOI: 10.3390/molecules15096512] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 09/13/2010] [Accepted: 09/14/2010] [Indexed: 11/17/2022] Open
Abstract
One of the biggest challenges in asymmetric synthesis is to prevent racemization of enantiopure starting materials. However, at least some of the enantiopurity is lost in most of the existing reactions used in synthetic organic chemistry. This translates into unnecessary material losses. Naturally enantiopure proteinogenic amino acids that can be transformed into many useful intermediates in drug syntheses, for example, are especially vulnerable to this. The phenylfluoren-9-yl (Pf) group, a relatively rarely used protecting group, has proven to be able to prevent racemization in α-amino compounds. This review article showcases the use of Pf-protected amino acid derivatives in enantiospecific synthesis.
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Affiliation(s)
| | - Ari M. P. Koskinen
- Laboratory of Organic Chemistry, Department of Chemistry, Aalto University, School of Science and Technology, PO Box 16100, Kemistintie 1, FI-00076 Aalto, Finland;
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16
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Stocker BL, Dangerfield EM, Win‐Mason AL, Haslett GW, Timmer MSM. Recent Developments in the Synthesis of Pyrrolidine‐Containing Iminosugars. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901320] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bridget L. Stocker
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
| | - Emma M. Dangerfield
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
| | - Anna L. Win‐Mason
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
| | - Gregory W. Haslett
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
| | - Mattie S. M. Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
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17
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18
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Caupène C, Chaume G, Ricard L, Brigaud T. Iodocyclization of Chiral CF3-Allylmorpholinones: A Versatile Strategy for the Synthesis of Enantiopure α-Tfm-Prolines and α-Tfm-Dihydroxyprolines. Org Lett 2008; 11:209-12. [DOI: 10.1021/ol8024567] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Caroline Caupène
- Laboratoire SOSCO (Synthèse Organique Sélective et Chimie Organométallique), Université de Cergy-Pontoise, UMR CNRS 8123, F-95000 Cergy-Pontoise, France, and Laboratoire Hétéroéléments et Coordination, Ecole Polytechnique, UMR CNRS 7653, 91128 Palaiseau, France
| | - Grégory Chaume
- Laboratoire SOSCO (Synthèse Organique Sélective et Chimie Organométallique), Université de Cergy-Pontoise, UMR CNRS 8123, F-95000 Cergy-Pontoise, France, and Laboratoire Hétéroéléments et Coordination, Ecole Polytechnique, UMR CNRS 7653, 91128 Palaiseau, France
| | - Louis Ricard
- Laboratoire SOSCO (Synthèse Organique Sélective et Chimie Organométallique), Université de Cergy-Pontoise, UMR CNRS 8123, F-95000 Cergy-Pontoise, France, and Laboratoire Hétéroéléments et Coordination, Ecole Polytechnique, UMR CNRS 7653, 91128 Palaiseau, France
| | - Thierry Brigaud
- Laboratoire SOSCO (Synthèse Organique Sélective et Chimie Organométallique), Université de Cergy-Pontoise, UMR CNRS 8123, F-95000 Cergy-Pontoise, France, and Laboratoire Hétéroéléments et Coordination, Ecole Polytechnique, UMR CNRS 7653, 91128 Palaiseau, France
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19
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Graça Martins J, Cambeiro Barrulas P, Marques CS, Burke AJ. New Route to N‐Alkylated trans‐Pyrrolidine Diols from 2,2,3,3‐Tetramethoxybutane‐Protected Dimethyl Tartrate. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910801916520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- J. Graça Martins
- a Chemistry Department and Évora Chemistry Centre , University of Évora , Évora , Portugal
| | - P. Cambeiro Barrulas
- a Chemistry Department and Évora Chemistry Centre , University of Évora , Évora , Portugal
| | - Carolina S. Marques
- a Chemistry Department and Évora Chemistry Centre , University of Évora , Évora , Portugal
| | - Anthony J. Burke
- a Chemistry Department and Évora Chemistry Centre , University of Évora , Évora , Portugal
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20
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Muñiz K, Hövelmann C, Campos-Gómez E, Barluenga J, González J, Streuff J, Nieger M. Intramolecular Diamination of Alkenes with Palladium(II)/Copper(II) Bromide and IPy2BF4: The Role of Halogenated Intermediates. Chem Asian J 2008; 3:776-88. [DOI: 10.1002/asia.200700373] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Rengasamy R, Curtis-Long MJ, Seo WD, Jeong SH, Jeong IY, Park KH. New building block for polyhydroxylated piperidine: total synthesis of 1,6-dideoxynojirimycin. J Org Chem 2008; 73:2898-901. [PMID: 18335959 DOI: 10.1021/jo702480y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
(3R,4S)-3-Hydroxy-4-N-allyl-N-Boc-amino-1-pentene 10, an important precursor for the synthesis of polyhydroxylated piperidines, has been achieved as a single diastereomer without racemization via vinyl Grignard addition to N-Boc-N-allyl aminoaldehyde 9, which was derived from an enantiopure natural amino acid. Having forged a tetrahydropyridine ring scaffold 13 from 10 in 85% yield via RCM using Grubbs II catalyst, we were able to effect its stereodivergent dihydroxylation, via a common epoxide intermediate to yield a range of interesting hydroxylated piperidines, including ent-1,6-dideoxynojirimycin (ent-1,6-dDNJ) 1 (28% overall yield) and 5-amino-1,5,6-trideoxyaltrose 2 (29% over all yield) in excellent dr. To the best of our knowledge, our synthesis of ent-1,6-dDNJ 1 is the most expeditious to date.
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Affiliation(s)
- Rajesh Rengasamy
- Division of Applied Life Science (BK21 program), EB-NCRC, Gyeongsang National University, Jinju 660-701, South Korea
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22
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Chen W, Pinto BM. Synthesis of aza- and thia-spiroheterocycles and attempted synthesis of spiro sulfonium compounds related to salacinol. Carbohydr Res 2007; 342:2163-72. [PMID: 17669386 DOI: 10.1016/j.carres.2007.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2007] [Revised: 07/01/2007] [Accepted: 07/03/2007] [Indexed: 11/16/2022]
Abstract
The synthesis of aza- and thia-spiroheterocycles and the attempted synthesis of spiro sulfonium compounds related to salacinol are described. The binding of the nanomolar inhibitor swainsonine to Drosophila Golgi alpha-mannosidase II (dGMII) involves a large contribution of interactions between the six-membered ring of the inhibitor and the hydrophobic pocket within the enzyme active site. Salacinol, a naturally occurring sulfonium ion, is one of the active principles in the aqueous extracts of Salacia reticulata that are traditionally used in Sri Lanka and India for the treatment of diabetes. Spiro aza- and thia-heterocycles and a spiro analogue of salacinol were designed with the expectation that the hydrocarbon portions would make hydrophobic contributions to binding. The former sets of compounds were synthesized successfully but the salacinol analogue proved to be elusive. The stereochemistry of the final compounds was determined by means of 1D-NOESY experiments. The aza- and thia-heterocycles were not effective inhibitors of Golgi alpha-mannosidase II or human maltase glucoamylase.
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Affiliation(s)
- Wang Chen
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
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23
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Joo JE, Lee KY, Pham VT, Tian YS, Ham WH. Application of Pd(0)-Catalyzed Intramolecular Oxazine Formation to the Efficient Total Synthesis of (−)-Anisomycin. Org Lett 2007; 9:3627-30. [PMID: 17685534 DOI: 10.1021/ol701519b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantioselective total synthesis of (-)-anisomycin, a potent antibiotic agent, has been achieved. The key steps are a Pd(0)-catalyzed stereoselective intramolecular oxazine formation from d-tyrosine and pyrrolidine formation by catalytic hydrogenation of the oxazine.
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Affiliation(s)
- Jae-Eun Joo
- College of Pharmacy, SungKyunKwan University, Suwon 440-746, Korea
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Diaba F, Ricou E, Bonjoch J. New Insights into NIS-Promoted Aminocyclization. Synthesis of Decahydroquinolines from 2-Allylcyclohexylamines. Org Lett 2007; 9:2633-6. [PMID: 17550259 DOI: 10.1021/ol070770g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bishomoallylic secondary amines embodying the 2-allyl-N-benzylcyclohexylamine unit react with NIS to undergo cyclization through 6-endo processes in either the cis or trans series. Nevertheless, when the resulting cis-3-iododecahydroquinolines are treated with Al2O3, the exo derivatives evolve into octahydroindoles and the endo derivatives keep the same backbone, the configuration being retained in the generated alcohols.
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Affiliation(s)
- Faïza Diaba
- Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, 08028-Barcelona, Spain
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25
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New Developments in the Synthesis of Anisomycin and Its Analogues. HETEROCYCLES FROM CARBOHYDRATE PRECURSORS 2007. [DOI: 10.1007/7081_2007_051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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26
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Stereospecific Synthesis of the (2R,3S)- and (2R,3R)-3-Amino-2-hydroxy-4-phenylbutanoic Acids from D-Glucono-δ-lactone. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.8.1211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Kim JH, Curtis-Long MJ, Seo WD, Lee JH, Lee BW, Yoon YJ, Kang KY, Park KH. α-Rhamnosidase inhibitory activities of polyhydroxylated pyrrolidine. Bioorg Med Chem Lett 2005; 15:4282-5. [PMID: 16039852 DOI: 10.1016/j.bmcl.2005.06.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2005] [Revised: 06/18/2005] [Accepted: 06/20/2005] [Indexed: 11/19/2022]
Abstract
We designed and synthesized polyhydroxylated pyrrolidines 1-12 from L-tyrosine, L-phenylalanine, and D-tyrosine through iodine-mediated intramolecular cyclization followed by Woodward-Prevost reaction. The synthetic polyhydroxylated pyrrolidines were identified with structure-based inhibitory activity and selective inhibitory activity against alpha-rhamnosidase. (2S,3S,4R)-deacetyl anisomycin 7 was the best inhibitor among the 12 polyhydroxylated pyrrolidines because it possesses the same stereoconfiguration at C1, C2, C3 as alpha-L-rhamnopyranoside. An investigation into the nature of the inhibition showed that the synthetic pyrrolidines are competitive inhibitors. They also did not have remarkable inhibitory activity against seven glycosidases (alpha-glucosidase, alpha-mannosidase, alpha-amylase, beta-glucosidase, beta-galactosidase, beta-amylase, and invertase).
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Affiliation(s)
- Jin Hyo Kim
- Division of Applied Life Science (BK21 program), Department of Agricultural Chemistry, Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea
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Kaden S, Brockmann M, Reissig HU. Syntheses of Enantiomerically Pure 2-Substituted Pyrrolidin-3-onesvia Lithiated Alkoxyallenes - An Auxiliary-Based Synthesis of both Enantiomers of the Antibiotic Anisomycin. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590143] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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