1
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Crespo Monteiro M, Vale JR, Siopa F. 2-Azabicyclo[3.2.1]octane scaffold: synthesis and applications. Org Biomol Chem 2024; 22:2902-2915. [PMID: 38526533 DOI: 10.1039/d4ob00199k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
2-Azabicyclo[3.2.1]octanes are nitrogen containing heterocycles with significant potential in the field of drug discovery. This core has been applied as key synthetic intermediate in several total synthesis, while their unique structure can make them a challenging scaffold to acquire. This Minireview summarizes the synthetic approaches to access this bicyclic architecture and highlights its presence in the total synthesis of several target molecules.
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Affiliation(s)
- Mariana Crespo Monteiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003, Lisbon, Portugal.
| | - João Rafael Vale
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003, Lisbon, Portugal.
| | - Filipa Siopa
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003, Lisbon, Portugal.
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2
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Ohashi E, Karanjit S, Nakayama A, Takeuchi K, Emam SE, Ando H, Ishida T, Namba K. Efficient construction of the hexacyclic ring core of palau'amine: the p K a concept for proceeding with unfavorable equilibrium reactions. Chem Sci 2021; 12:12201-12210. [PMID: 34667586 PMCID: PMC8457368 DOI: 10.1039/d1sc03260g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/10/2021] [Indexed: 11/21/2022] Open
Abstract
Palau'amine has received a great deal of attention as an attractive synthetic target due to its intriguing molecular architecture and significant immunosuppressive activity, and we achieved its total synthesis in 2015. However, the synthesized palau'amine has not been readily applicable to the mechanistic study of immunosuppressive activity, because it requires 45 longest linear steps from a commercially available compound. Here, we report the short-step construction of the ABCDEF hexacyclic ring core of palau'amine. The construction of the CDE tricyclic ring core in a single step is achieved by our pKa concept for proceeding with unfavorable equilibrium reactions, and a palau'amine analog without the aminomethyl and chloride groups is synthesized in 20 longest linear steps from the same starting material. The palau'amine analog is confirmed to retain the immunosuppressive activity. The present synthetic approach for a palau'amine analog has the potential for use in the development of palau'amine probes for mechanistic elucidation. A palau'amine analog (2) was synthesized from 2-cyclopentenone in 20 steps. The construction of the CDE tricyclic ring core in a single step is achieved by our pKa concept for proceeding with the unfavorable equilibrium reactions.![]()
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Affiliation(s)
- Eisaku Ohashi
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Sangita Karanjit
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan .,Research Cluster on "Innovative Chemical Sensing", Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Atsushi Nakayama
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan .,Research Cluster on "Innovative Chemical Sensing", Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Kohei Takeuchi
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Sherif E Emam
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Hidenori Ando
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Tatsuhiro Ishida
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
| | - Kosuke Namba
- Graduate School of Pharmaceutical Sciences, Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan .,Research Cluster on "Innovative Chemical Sensing", Tokushima University 1-78 Shomachi Tokushima 770-8505 Japan
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3
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Cannon JS. A Nitrone Dipolar Cycloaddition Strategy toward an Enantioselective Synthesis of Massadine. Org Lett 2018; 20:3883-3887. [PMID: 29897770 DOI: 10.1021/acs.orglett.8b01464] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An enantioselective route to the C,D-bicycle of massadine is reported. Enantiopure intermediates were generated by a single stereoselective reduction using the Corey-Bakshi-Shibata reagent. This initial stereoinduction was translated into the five contiguous stereocenters of the massadine D-ring by a synthetic route that features a diastereoselective and stereospecific Ireland-Claisen rearrangement of a trianionic enolate followed by a diastereoselective nitrone dipolar cycloaddition of a highly electron-poor oxime.
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Affiliation(s)
- Jeffrey S Cannon
- Department of Chemistry , University of California , 1102 Natural Sciences II, Irvine , California 92697-2025 , United States
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4
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Imaoka T, Iwata M, Nagasawa K. Synthesis of a Quaternary N
,N′
-Aminal-Containing A-E Ring System of Palau′amine via an Enamide-Type Overman Rearrangement Reaction. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800086] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Takuya Imaoka
- Graduate School of Technology; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho 184-8588, Tokyo Koganei Japan
| | - Makoto Iwata
- Graduate School of Technology; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho 184-8588, Tokyo Koganei Japan
| | - Kazuo Nagasawa
- Graduate School of Technology; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho 184-8588, Tokyo Koganei Japan
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5
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Aubert-Nicol S, Lessard J, Spino C. A Photorearrangement To Construct the ABDE Tetracyclic Core of Palau'amine. Org Lett 2018; 20:2615-2619. [PMID: 29667828 DOI: 10.1021/acs.orglett.8b00819] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A synthesis of the ABDE tetracyclic carbon core of palau'amine was achieved in 9 steps from commercial materials. The core's most notable feature, a highly strained trans cyclopenta[ c]pyrrolidine, was obtained in high yield using a ring contraction strategy starting from a much less strained trans bicyclic lactam derivative that is accessible in only 7 steps.
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Affiliation(s)
- Samuel Aubert-Nicol
- Département de Chimie , Université de Sherbrooke , 2500 Boul. Université , Sherbrooke , Québec , Canada , J1K 2R1
| | - Jean Lessard
- Département de Chimie , Université de Sherbrooke , 2500 Boul. Université , Sherbrooke , Québec , Canada , J1K 2R1
| | - Claude Spino
- Département de Chimie , Université de Sherbrooke , 2500 Boul. Université , Sherbrooke , Québec , Canada , J1K 2R1
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6
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7
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Ma Z, Wang X, Ma Y, Chen C. Asymmetric Synthesis of Axinellamines A and B. Angew Chem Int Ed Engl 2016; 55:4763-6. [PMID: 27037993 PMCID: PMC4836294 DOI: 10.1002/anie.201600007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 02/05/2016] [Indexed: 11/10/2022]
Abstract
Axinellamines A and B are broad-spectrum antibacterial pyrrole-imidazole alkaloids that have a complex polycyclic skeleton. A new asymmetric synthesis of these marine sponge metabolites is described herein, featuring an oxidative rearrangement and an anchimeric chlorination reaction.
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
| | - Xiao Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
- Department of Chemistry and Biochemistry, The University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Yuyong Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA
- Department of Chemistry and Biochemistry, The University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390, USA.
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8
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
| | - Xiao Wang
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
- Department of Chemistry and Biochemistry The University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Yuyong Ma
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
- Department of Chemistry and Biochemistry The University of California, San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Chuo Chen
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390 USA
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9
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Namba K, Takeuchi K, Kaihara Y, Oda M, Nakayama A, Nakayama A, Yoshida M, Tanino K. Total synthesis of palau'amine. Nat Commun 2015; 6:8731. [PMID: 26530707 PMCID: PMC4667646 DOI: 10.1038/ncomms9731] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/25/2015] [Indexed: 11/09/2022] Open
Abstract
Palau'amine has received a great deal of attention in the past two decades as an attractive synthetic target by virtue of its intriguing molecular architecture and significant immunosuppressive activity. Here we report the total synthesis of palau'amine characterized by the construction of an ABDE tetracyclic ring core including a trans-bicylo[3.3.0]octane skeleton at a middle stage of total synthesis. The ABDE tetracyclic ring core is constructed by a cascade reaction of a cleavage of the N-N bond, including simultaneous formation of imine, the addition of amide anion to the resulting imine (D-ring formation) and the condensation of pyrrole with methyl ester (B-ring formation) in a single step. The synthetic palau'amine is confirmed to exhibit excellent immunosuppressive activity. The present synthetic route has the potential to help elucidate a pharmacophore as well as the mechanistic details of immunosuppressive activity.
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Affiliation(s)
- Kosuke Namba
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Kohei Takeuchi
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan.,Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Yukari Kaihara
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-ku, Sapporo 060-0810, Japan
| | - Masataka Oda
- Graduate School of Medical and Dental Sciences, Niigata University, Chuo-ku, Niigata 951-8514, Japan
| | - Akira Nakayama
- Catalysis Research Center, Hokkaido University, Sapporo 001-0021, Japan
| | - Atsushi Nakayama
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Masahiro Yoshida
- Department of Pharmaceutical Science, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Keiji Tanino
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita-ku, Sapporo 060-0810, Japan
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10
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Abstract
The carbocyclic core of massadine has been synthesized relying on a stereoselective formal [3 + 2] cycloaddition of lithiumtrimethylsilyldiazomethane with α,β-unsaturated esters to form a Δ(2)-pyrazoline moiety followed by facile N-N bond cleavage. A unique feature of the current approach is the direct installation of the tertiary α-amino center and a β-cyano group in a cis arrangement on the resulting cyclopentane framework via a previously developed formal aminocyanation protocol.
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Affiliation(s)
- Chunrui Sun
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Hyunjin Lee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
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11
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Abstract
Naturally occurring guanidine derivatives frequently display medicinally useful properties. Among them, the higher order pyrrole-imidazole alkaloids, the dragmacidins, the crambescidins/batzelladines, and the saxitoxins/tetradotoxins have stimulated the development of many new synthetic methods over the past decades. We provide here an overview of the syntheses of these cyclic guanidine-containing natural products.
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Affiliation(s)
- Yuyong Ma
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
| | - Saptarshi De
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
| | - Chuo Chen
- Division of Chemistry, Department of Biochemistry, U T Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
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12
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Wang X, Ma Z, Wang X, De S, Ma Y, Chen C. Dimeric pyrrole-imidazole alkaloids: synthetic approaches and biosynthetic hypotheses. Chem Commun (Camb) 2014; 50:8628-39. [PMID: 24828265 PMCID: PMC4096073 DOI: 10.1039/c4cc02290d] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The pyrrole-imidazole alkaloids are a group of structurally unique and biologically interesting marine sponge metabolites. Among them, the cyclic dimers have caught synthetic chemists' attention particularly. Numerous synthetic strategies have been developed and various biosynthetic hypotheses have been proposed for these fascinating natural products. We discuss herein the synthetic approaches and the biosynthetic insights obtained from these studies.
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Affiliation(s)
- Xiao Wang
- Division of Chemistry, Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA.
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13
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Fang Z, Liu J, Liu Q, Bi X. [3+2] Cycloaddition of Propargylic Alcohols and α‐Oxo Ketene Dithioacetals: Synthesis of Functionalized Cyclopentadienes and Further Application in a Diels–Alder Reaction. Angew Chem Int Ed Engl 2014; 53:7209-13. [DOI: 10.1002/anie.201403014] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 04/14/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Zhongxue Fang
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
| | - Jianquan Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
| | - Xihe Bi
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
- State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071 (China)
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14
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Fang Z, Liu J, Liu Q, Bi X. [3+2] Cycloaddition of Propargylic Alcohols and α‐Oxo Ketene Dithioacetals: Synthesis of Functionalized Cyclopentadienes and Further Application in a Diels–Alder Reaction. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhongxue Fang
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
| | - Jianquan Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
| | - Xihe Bi
- Department of Chemistry, Northeast Normal University, Changchun 130024 (China) http://www.bigroup.com.cn/
- State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071 (China)
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15
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Wang X, Wang X, Tan X, Lu J, Cormier KW, Ma Z, Chen C. A biomimetic route for construction of the [4+2] and [3+2] core skeletons of dimeric pyrrole-imidazole alkaloids and asymmetric synthesis of ageliferins. J Am Chem Soc 2012; 134:18834-42. [PMID: 23072663 DOI: 10.1021/ja309172t] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The pyrrole-imidazole alkaloids have fascinated chemists for decades because of their unique structures. The high nitrogen and halogen contents and the densely functionalized skeletons make their laboratory synthesis challenging. We describe herein an oxidative method for accessing the core skeletons of two classes of pyrrole-imidazole dimers. This synthetic strategy was inspired by the putative biosynthesis pathways and its development was facilitated by computational studies. Using this method, we have successfully prepared ageliferin, bromoageliferin, and dibromoageliferin in their natural enantiomeric form.
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Affiliation(s)
- Xiao Wang
- Division of Chemistry, Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, 75390-9038, United States
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16
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Fukahori Y, Takayama Y, Imaoka T, Iwamoto O, Nagasawa K. Intramolecular 1,3-Dipolar Cycloaddition-Mediated Stereoselective Synthesis of Disubstituted Cyclopentane: A Simple Model for the Cyclopentane Ring System of Polycyclic Oroidine Alkaloids. Chem Asian J 2012; 8:244-50. [DOI: 10.1002/asia.201200820] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Indexed: 11/08/2022]
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17
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Kim M, O'Brien TE, Moore JT, Anderson DE, Foss MH, Weibel DB, Ames J, Shaw JT. The Synthesis and Antimicrobial Activity of Heterocyclic Derivatives of Totarol. ACS Med Chem Lett 2012; 3:818-822. [PMID: 23119123 PMCID: PMC3483140 DOI: 10.1021/ml3001775] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Accepted: 08/28/2012] [Indexed: 11/30/2022] Open
Abstract
The synthesis and antimicrobial activity heterocyclic analogs of the diterpenoid totarol are described. An advanced synthetic intermediate with a ketone on the A-ring is used to attach fused heterocycles and a carbon-to-nitrogen atom replacement is made on the B-ring by de novo synthesis. A-ring analogs with an indole attached exhibit, for the first time, enhanced antimicrobial activity relative to the parent natural product. Preliminary experiments demonstrate that the indole analogs do not target the bacterial cell division protein FtsZ as had been hypothesized for totarol.
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Affiliation(s)
- Michelle
B. Kim
- Department of Chemistry, University
of California, One Shields Avenue, Davis,
California 95616, United States
| | - Terrence E. O'Brien
- Department of Chemistry, University
of California, One Shields Avenue, Davis,
California 95616, United States
| | - Jared T. Moore
- Department of Chemistry, University
of California, One Shields Avenue, Davis,
California 95616, United States
| | - David E. Anderson
- Department of Chemistry, University
of California, One Shields Avenue, Davis,
California 95616, United States
| | - Marie H. Foss
- Department
of Biochemistry and Department of Biomedical Engineering, University
of Wisconsin, Madison, Wisconsin 53706, United States
| | - Douglas B. Weibel
- Department
of Biochemistry and Department of Biomedical Engineering, University
of Wisconsin, Madison, Wisconsin 53706, United States
| | - James
B. Ames
- Department of Chemistry, University
of California, One Shields Avenue, Davis,
California 95616, United States
| | - Jared T. Shaw
- Department of Chemistry, University
of California, One Shields Avenue, Davis,
California 95616, United States
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18
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Ding H, Roberts AG, Harran PG. Synthetic (±)-Axinellamines Deficient in Halogen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Ding H, Roberts AG, Harran PG. Synthetic (±)-axinellamines deficient in halogen. Angew Chem Int Ed Engl 2012; 51:4340-3. [PMID: 22431425 DOI: 10.1002/anie.201200205] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Hui Ding
- Department of Chemistry and Biochemistry, University of California Los Angeles, 5505A Molecular Sciences Building, 607 Charles E. Young Drive East, Los Angeles, CA 90095-1569, USA
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20
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Dong S, Cahill KAJ, Kang MI, Colburn NH, Henrich CJ, Wilson JA, Beutler JA, Johnson RP, Porco JA. Microwave-based reaction screening: tandem retro-Diels-Alder/Diels-Alder cycloadditions of o-quinol dimers. J Org Chem 2011; 76:8944-54. [PMID: 21942286 PMCID: PMC3214659 DOI: 10.1021/jo201658y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have accomplished a parallel screen of cycloaddition partners for o-quinols utilizing a plate-based microwave system. Microwave irradiation improves the efficiency of retro-Diels-Alder/Diels-Alder cascades of o-quinol dimers which generally proceed in a diastereoselective fashion. Computational studies indicate that asynchronous transition states are favored in Diels-Alder cycloadditions of o-quinols. Subsequent biological evaluation of a collection of cycloadducts has identified an inhibitor of activator protein-1 (AP-1), an oncogenic transcription factor.
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Affiliation(s)
- Suwei Dong
- Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, Boston, Massachusetts 02215
| | | | - Moon -Il Kang
- Laboratory of Cancer Prevention and Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Frederick, MD 21702
| | - Nancy H. Colburn
- Laboratory of Cancer Prevention and Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Frederick, MD 21702
| | - Curtis J. Henrich
- Laboratory of Cancer Prevention and Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Frederick, MD 21702
| | - Jennifer A. Wilson
- Laboratory of Cancer Prevention and Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Frederick, MD 21702
| | - John A. Beutler
- Laboratory of Cancer Prevention and Molecular Targets Laboratory, Center for Cancer Research, NCI-Frederick, Frederick, MD 21702
| | | | - John A. Porco
- Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, Boston, Massachusetts 02215
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21
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Seiple IB, Su S, Young IS, Nakamura A, Yamaguchi J, Jørgensen L, Rodriguez RA, O’Malley DP, Gaich T, Köck M, Baran PS. Enantioselective total syntheses of (-)-palau'amine, (-)-axinellamines, and (-)-massadines. J Am Chem Soc 2011; 133:14710-26. [PMID: 21861522 PMCID: PMC3173569 DOI: 10.1021/ja2047232] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dimeric pyrrole-imidazole alkaloids represent a rich and topologically unique class of marine natural products. This full account will follow the progression of efforts that culminated in the enantioselective total syntheses of the most structurally ornate members of this family: the axinellamines, the massadines, and palau'amine. A bio-inspired approach capitalizing on the pseudo-symmetry of the members of this class is recounted, delivering a deschloro derivative of the natural product core. Next, the enantioselective synthesis of the chlorocyclopentane core featuring a scalable, catalytic, enantioselective Diels-Alder reaction of a 1-siloxydiene is outlined in detail. Finally, the successful divergent conversion of this core to each of the aforementioned natural products, and the ensuing methodological developments, are described.
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Affiliation(s)
- Ian B. Seiple
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | | | | | - Akifumi Nakamura
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Junichiro Yamaguchi
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Lars Jørgensen
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Rodrigo A. Rodriguez
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Daniel P. O’Malley
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Tanja Gaich
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Matthias Köck
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
| | - Phil S. Baran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037
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Breder A, Chinigo GM, Waltman AW, Carreira EM. Towards the Synthesis of Massadine: A Unified Strategy for the Stereoselective Synthesis of the Carbocyclic C,D-Ring Subunit. Chemistry 2011; 17:12405-16. [DOI: 10.1002/chem.201101862] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Indexed: 11/07/2022]
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23
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Abstract
We describe herein an asymmetric synthesis of ageliferin. A Mn(III)-mediated oxidative radical cyclization reaction was used as the key step to construct the core skeleton of this pyrrole-imidazole dimer. This approach resembles the biogenic [4 + 2] dimerization in an intramolecular fashion.
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Affiliation(s)
- Xiao Wang
- Division of Chemistry, Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
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Al-Mourabit A, Zancanella MA, Tilvi S, Romo D. Biosynthesis, asymmetric synthesis, and pharmacology, including cellular targets, of the pyrrole-2-aminoimidazole marine alkaloids. Nat Prod Rep 2011; 28:1229-60. [PMID: 21556392 PMCID: PMC5596510 DOI: 10.1039/c0np00013b] [Citation(s) in RCA: 161] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The pyrrole-2-aminoimidazole (P-2-AI) alkaloids are a growing family of marine alkaloids, now numbering well over 150 members, with high topographical and biological information content. Their intriguing structural complexity, rich and compact stereochemical content, high N to C ratio (~1 : 2), and increasingly studied biological activities are attracting a growing number of researchers from numerous disciplines world-wide. This review surveys advances in this area with a focus on the structural diversity, biosynthetic hypotheses with increasing, but still rare, verifying experimental studies, asymmetric syntheses, and biological studies, including cellular target receptor isolation studies, of this stimulating and exciting alkaloid family.
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Affiliation(s)
- Ali Al-Mourabit
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | | | - Supriya Tilvi
- Bio-organic Chemistry laboratory, National Institute of Oceanography, Dona Paula, Goa, India, 403 004
| | - Daniel Romo
- Department of Chemistry, Texas A&M Universtiy College Station, TX 77842-3012
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25
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Feldman KS, Nuriye AY. Extending Pummerer reaction chemistry: application to the assembly of the pentacyclic core of dibromopalau'amine. Org Lett 2011; 12:4532-5. [PMID: 20839833 DOI: 10.1021/ol1018322] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A pentacyclic model system featuring the trans azabicyclo[3.3.0]octane unit of dibromopalau'amine was prepared with complete diastereoselectivity in the polycyclic core from a tricyclic precursor. The key transformations of this sequence include (a) a Pummerer reaction-mediated oxidative bicyclization, and (b) a Wolff rearrangement-based ring contraction to deliver the strained azabicyclo[3.3.0]octane core.
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Affiliation(s)
- Ken S Feldman
- Chemistry Department, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
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26
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He Y, Krishnamoorthy P, Lima HM, Chen Y, Wu H, Sivappa R, Dias HVR, Lovely CJ. Intramolecular Diels–Alder chemistry of 4-vinylimidazoles. Org Biomol Chem 2011; 9:2685-701. [DOI: 10.1039/c0ob00657b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Namba K, Inai M, Sundermeier U, Greshock TJ, Williams RM. Synthetic Studies on Palau'amine. Construction of the Cyclopentane Core via an Asymmetric 1,3-Dipolar Cycloaddition. Tetrahedron Lett 2010; 51:6557-6559. [PMID: 21286237 PMCID: PMC3030269 DOI: 10.1016/j.tetlet.2010.10.037] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The cyclopentane core of palau'amine has been constructed in optically pure form through the use of an asymmetric azomethine ylid [1,3]-dipolar cycloaddition reaction.
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Affiliation(s)
- Kosuke Namba
- Department of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, CO 80523, USA
| | - Makto Inai
- Department of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, CO 80523, USA
| | - Uta Sundermeier
- Department of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, CO 80523, USA
| | - Thomas J. Greshock
- Department of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, CO 80523, USA
| | - Robert M. Williams
- Department of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, CO 80523, USA
- University of Colorado Cancer Center, Aurora, CO 80045, USA
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29
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Chinigo GM, Breder A, Carreira EM. Ugi-4-Component Reaction Enabling Rapid Access to the Core Fragment of Massadine. Org Lett 2010; 13:78-81. [DOI: 10.1021/ol102577q] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gary M. Chinigo
- Laboratorium für Organische Chemie, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Alexander Breder
- Laboratorium für Organische Chemie, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische Chemie, ETH Zürich, CH-8093 Zürich, Switzerland
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30
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Ma Z, Lu J, Wang X, Chen C. Revisiting the Kinnel-Scheuer hypothesis for the biosynthesis of palau'amine. Chem Commun (Camb) 2010; 47:427-9. [PMID: 20848010 DOI: 10.1039/c0cc02214d] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We propose herein an alternative biosynthetic pathway for palau'amine in order to resolve the stereochemical issue from the original Kinnel-Scheuer hypothesis. Furthermore, we use this revised hypothesis as a guide toward the laboratory synthesis of palau'amine.
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry, UT Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA
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31
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Imaoka T, Akimoto T, Iwamoto O, Nagasawa K. Total Synthesis of (+)-Dibromophakellin and (+)-Dibromophakellstatin. Chem Asian J 2010; 5:1810-6. [DOI: 10.1002/asia.201000213] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Affiliation(s)
- Tanja Gaich
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, 92037 La Jolla, California
| | - Phil S. Baran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, 92037 La Jolla, California
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33
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Seiple IB, Su S, Young IS, Lewis CA, Yamaguchi J, Baran PS. Total synthesis of palau'amine. Angew Chem Int Ed Engl 2010; 49:1095-8. [PMID: 20041464 PMCID: PMC3367661 DOI: 10.1002/anie.200907112] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Ian S. Young
- Department of Chemistry, The Scripps Research Institute, 10650 North Torrey Pines Road, La Jolla, CA, 92037 (USA), Fax: (+1) 858-784-7375
| | - Chad A. Lewis
- Department of Chemistry, The Scripps Research Institute, 10650 North Torrey Pines Road, La Jolla, CA, 92037 (USA), Fax: (+1) 858-784-7375
| | - Junichiro Yamaguchi
- Department of Chemistry, The Scripps Research Institute, 10650 North Torrey Pines Road, La Jolla, CA, 92037 (USA), Fax: (+1) 858-784-7375
| | - Phil S. Baran
- Department of Chemistry, The Scripps Research Institute, 10650 North Torrey Pines Road, La Jolla, CA, 92037 (USA), Fax: (+1) 858-784-7375
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34
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Seiple I, Su S, Young I, Lewis C, Yamaguchi J, Baran P. Total Synthesis of Palau’amine. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200907112] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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35
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Su S, Seiple IB, Young IS, Baran PS. Total syntheses of (+/-)-massadine and massadine chloride. J Am Chem Soc 2009; 130:16490-1. [PMID: 19049446 DOI: 10.1021/ja8074852] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shun Su
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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36
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Li Q, Hurley P, Ding H, Roberts AG, Akella R, Harran PG. Exploring symmetry-based logic for a synthesis of palau'amine. J Org Chem 2009; 74:5909-19. [PMID: 19603820 PMCID: PMC2888864 DOI: 10.1021/jo900755r] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic approach to palau'amine is described that exploits veiled symmetry in the structure. Bis-alkylidenes i have been prepared and found susceptible to halogenative desymmetrization using t-BuOCl. This oxidation forms the imbedded spirocyclopentane motif observed in the natural product. A host of atypical reactions and processes developed during these studies are discussed, as are plans for completing total syntheses of this compound class.
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Affiliation(s)
- Qingyi Li
- Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
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Namba K, Kaihara Y, Yamamoto H, Imagawa H, Tanino K, Williams RM, Nishizawa M. Toward palau'amine: Hg(OTf)2-catalyzed synthesis of the cyclopentane core. Chemistry 2009; 15:6560-3. [PMID: 19492366 PMCID: PMC2837586 DOI: 10.1002/chem.200900622] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AbstractCatalytic cyclization: The Hg(OTf)2‐catalyzed N‐selective cyclization of amide carbonyl moieties for the construction of a quaternary carbon center was developed. The Hg(OTf)2‐catalyzed cyclization of cyclopentylidene alcohol with acylhydrazide afforded the desired cyclopenta[c]pyridazinone in good yield. The subsequent eight steps gave the functionalized cyclopentane with the correct stereochemistry that corresponds to the E ring of palau′amine (see scheme).magnified image
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Affiliation(s)
- Kosuke Namba
- Division of Chemistry, Hokkaido University, Kita-ku, Sapporo 060-0810, Japan.
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38
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Heasley B. Stereocontrolled Preparation of Fully Substituted Cyclopentanes: Relevance to Total Synthesis. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801229] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Brian Heasley
- Scynexis, Inc., P.O. Box 12878, Research Triangle Park, NC 27709‐2878, Fax: +1‐919‐544‐8697
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40
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Hudon J, Cernak TA, Ashenhurst JA, Gleason JL. Stable 5-substituted cyclopentadienes for the Diels-Alder cycloaddition and their application to the synthesis of palau'amine. Angew Chem Int Ed Engl 2008; 47:8885-8. [PMID: 18855951 DOI: 10.1002/anie.200803344] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jonathan Hudon
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A 2K6, Canada
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41
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Hudon J, Cernak T, Ashenhurst J, Gleason J. Stable 5-Substituted Cyclopentadienes for the Diels-Alder Cycloaddition and their Application to the Synthesis of Palau'amine. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803344] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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