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Biçer E, Yılmaz M. Recent Advances in Manganese(III)-Assisted Radical Cyclization for the Synthesis of Natural Products: A Comprehensive Review. Molecules 2024; 29:2264. [PMID: 38792125 PMCID: PMC11123744 DOI: 10.3390/molecules29102264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Natural products play an important part in synthetic chemistry since they have many pharmacological properties and are used as active drug compounds in pharmaceutical chemistry. However, synthesis of these complex molecules is difficult due to the requirement of various synthetic steps, which include highly regio- and stereoselectivity. Therefore, oxidative radical cyclization assisted by manganese(III) acetate serves as an important step in obtaining spiro-, tricyclic, tetracyclic, and polycyclic derivatives of these compounds. Manganese(III)-based reactions offer a single-step regio- and stereoselective cyclizations and α-acetoxidations, reducing the number of synthetic steps. Also, the manganese(III)-mediated oxidative free radical cyclization method has been successfully applied for the synthesis of cyclic structures found in many natural products. This article presents a broad overview of manganese(III)-based radical reactions of natural products as a key step in overall synthesis. The authors have classified natural product synthesis processes assisted by manganese(III) acetate as intermolecular, intramolecular, oxidation, acetoxidation, aromatization, and polymerization reactions, respectively.
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Affiliation(s)
- Emre Biçer
- Faculty of Engineering and Natural Sciences, Sivas University of Science and Technology, 58010 Sivas, Türkiye
| | - Mehmet Yılmaz
- Department of Chemistry, Faculty of Art and Sciences, Kocaeli University, 41380 Umuttepe, Türkiye;
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2
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Selective synthesis of iminodioxaspirononanes and diazaspirononanes using formic acid-activated Mn(III) oxidation of N1,N3-disubstitued malonamides with 1,1-diarylethenes. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Nishino H, Nagashimada T, Morikawa M, Ohki K. Mn(III)-Based Oxidative Cyclization of 2-((2-Arylamino)ethyl)malonates: Synthesis of Quinolines via Dihydroquinolinedicarboxylates. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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(±)-trans-2-phenyl-2,3-dihydrobenzofurans as leishmanicidal agents: Synthesis, in vitro evaluation and SAR analysis. Eur J Med Chem 2020; 205:112493. [DOI: 10.1016/j.ejmech.2020.112493] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/06/2020] [Accepted: 05/20/2020] [Indexed: 11/18/2022]
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5
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Cortés I, Cala LJ, Bracca ABJ, Kaufman TS. Furo[3,2- c]coumarins carrying carbon substituents at C-2 and/or C-3. Isolation, biological activity, synthesis and reaction mechanisms. RSC Adv 2020; 10:33344-33377. [PMID: 35515056 PMCID: PMC9056730 DOI: 10.1039/d0ra06930b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/01/2020] [Indexed: 12/23/2022] Open
Abstract
The isolation, biological activity and synthesis of natural furo[3,2-c]coumarins are presented, covering mainly the developments in the last 35 years. The most relevant approaches toward the synthesis of 2-substituted, 3-substituted and 2,3-disubstituted heterocycles are also discussed, with emphasis on the efficiency of the processes and their mechanisms.
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Affiliation(s)
- Iván Cortés
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - L Javier Cala
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Andrea B J Bracca
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
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Alehashem MS, Ariffin AB, Savage PB, Yehya Dabdawb WA, Thomas NF. Treasures old and new: what we can learn regarding the macrocyclic problem from past and present efforts in natural product total synthesis. RSC Adv 2020; 10:10989-11012. [PMID: 35495309 PMCID: PMC9050488 DOI: 10.1039/d0ra01132k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 03/04/2020] [Indexed: 11/21/2022] Open
Abstract
In this review the strategies leading to successful macrocyclization, in the context of total synthesis are discussed.
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Affiliation(s)
| | - Azhar Bin Ariffin
- Department of Chemistry
- Faculty of Science
- University Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Paul B. Savage
- Department of Chemistry and Biochemistry
- Brigham Young University
- Provo
- USA
| | | | - Noel Francis Thomas
- American Degree Transfer Program
- Methodist College Kuala Lumpur
- 50470 Kuala Lumpur
- Malaysia
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Silva AR, Polo EC, Martins NC, Correia CRD. Enantioselective Oxy-Heck-Matsuda Arylations: Expeditious Synthesis of Dihydrobenzofuran Systems and Total Synthesis of the Neolignan (−)-Conocarpan. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701278] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Allan R. Silva
- Institute of Chemistry; University of Campinas, UNICAMP, Campinas; São Paulo Brazil
| | - Ellen C. Polo
- Institute of Chemistry; University of Campinas, UNICAMP, Campinas; São Paulo Brazil
| | - Nelson C. Martins
- Institute of Chemistry; University of Campinas, UNICAMP, Campinas; São Paulo Brazil
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8
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Hamama WS, Hassanien AEDE, Zoorob HH. Advanced Routes in Synthesis and Reactions of Lawsone Molecules (2-Hydroxynaphthalene-1,4-dione). J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2855] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wafaa S. Hamama
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
| | - Alaa El-Din E. Hassanien
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
| | - Hanafi H. Zoorob
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
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9
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Brambilla LZ, Endo EH, Cortez DA, Dias Filho BP. Anti-biofilm activity against Staphylococcus aureus MRSA and MSSA of neolignans and extract of Piper regnellii. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2017. [DOI: 10.1016/j.bjp.2016.08.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Liu X, Chen X, Mohr JT. Regiocontrolled Oxidative C–C Coupling of Dienol Ethers and 1,3-Dicarbonyl Compounds. Org Lett 2016; 18:3182-5. [PMID: 27280861 DOI: 10.1021/acs.orglett.6b01397] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoguang Liu
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Xiaohong Chen
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Justin T. Mohr
- 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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Liu X, Chen X, Mohr JT. Cascade Mn-Mediated γ-Alkylation/oxa-Michael Addition of Enones with 1,3-Dicarbonyls. Chemistry 2016; 22:2274-7. [PMID: 26683524 DOI: 10.1002/chem.201505027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Xiaoguang Liu
- Department of Chemistry; University of Illinois at Chicago; 845 West Taylor Street Chicago Illinois 60607 USA
| | - Xiaohong Chen
- Department of Chemistry; University of Illinois at Chicago; 845 West Taylor Street Chicago Illinois 60607 USA
| | - Justin T. Mohr
- Department of Chemistry; University of Illinois at Chicago; 845 West Taylor Street Chicago Illinois 60607 USA
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12
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Tumanskii BL, Sabirov DS, Lyakhovetsky YI. A mechanistic study of manganese(iii) acetate-mediated phosphonyl group additions to [60]- and [70]-fullerenes: the oxidative-ion-transfer mechanism vs. free radical addition. Dalton Trans 2016; 45:16838-16849. [DOI: 10.1039/c6dt02941h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phosphonylation of fullerenes with HP(O)(OAlk)2 and Mn(OAc)3·2H2O occurs via the oxidative-ion-transfer mechanism involving the intermediate Mn(OAc)2P(O)(OAlk)2 rather than by the free radical process.
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Affiliation(s)
- Boris L. Tumanskii
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences
- 119991 GSP-1 Moscow V-334
- Russia
| | - Denis S. Sabirov
- Institute of Petrochemistry and Catalysis of the Russian Academy of Sciences
- 450075 Ufa
- Russia
| | - Yury I. Lyakhovetsky
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences
- 119991 GSP-1 Moscow V-334
- Russia
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13
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Li X, Xu J, Gao Y, Fang H, Tang G, Zhao Y. Cascade Arylalkylation of Activated Alkenes: Synthesis of Chloro- and Cyano-Containing Oxindoles. J Org Chem 2015; 80:2621-6. [DOI: 10.1021/jo502777b] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Xueqin Li
- Department
of Chemistry, College of Chemistry and Chemical Engineering, and Key
Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, China
| | - Jian Xu
- Department
of Chemistry, College of Chemistry and Chemical Engineering, and Key
Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, China
| | - Yuzhen Gao
- Department
of Chemistry, College of Chemistry and Chemical Engineering, and Key
Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, China
| | - Hua Fang
- The
Third Instiute of Oceanography, State Oceanic Administration, Xiamen, Fujian 361005, China
| | - Guo Tang
- Department
of Chemistry, College of Chemistry and Chemical Engineering, and Key
Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, China
| | - Yufen Zhao
- Department
of Chemistry, College of Chemistry and Chemical Engineering, and Key
Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, China
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14
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Blum TR, Zhu Y, Nordeen SA, Yoon TP. Photocatalytic synthesis of dihydrobenzofurans by oxidative [3+2] cycloaddition of phenols. Angew Chem Int Ed Engl 2014; 53:11056-9. [PMID: 25155300 PMCID: PMC4220618 DOI: 10.1002/anie.201406393] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Indexed: 11/06/2022]
Abstract
We report a protocol for oxidative [3+2] cycloadditions of phenols and alkenes applicable to the modular synthesis of a large family of dihydrobenzofuran natural products. Visible-light-activated transition metal photocatalysis enables the use of ammonium persulfate as an easily handled, benign terminal oxidant. The broad range of organic substrates that are readily oxidized by photoredox catalysis suggests that this strategy may be applicable to a variety of useful oxidative transformations.
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Affiliation(s)
- Travis R. Blum
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706
| | - Ye Zhu
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706
| | - Sarah A. Nordeen
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706
| | - Tehshik P. Yoon
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706
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15
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Blum TR, Zhu Y, Nordeen SA, Yoon TP. Photocatalytic Synthesis of Dihydrobenzofurans by Oxidative [3+2] Cycloaddition of Phenols. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406393] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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16
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Wu B, Chen MW, Ye ZS, Yu CB, Zhou YG. A Streamlined Synthesis of 2,3-Dihydrobenzofuransviatheortho-Quinone Methides Generated from 2-Alkyl-Substituted Phenols. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300830] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Chen PY, Wu YH, Hsu MH, Wang TP, Wang EC. Cerium ammonium nitrate-mediated the oxidative dimerization of p-alkenylphenols: a new synthesis of substituted (±)-trans-dihydrobenzofurans. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.11.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Larghi EL, Operto MA, Torres R, Kaufman TS. Synthesis and classical pathway Complement inhibitory activity of C7-functionalized filifolinol derivatives, inspired in K-76 COOH. Eur J Med Chem 2012; 55:74-84. [DOI: 10.1016/j.ejmech.2012.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 06/29/2012] [Accepted: 07/02/2012] [Indexed: 11/27/2022]
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19
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Gwon SH, Kim SG. One-Pot Cascade Michael-Cyclization Reactions of o-Hydroxycinnamaldehydes: Synthesis of Functionalized 2,3-Dihydrobenzofuranes. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.8.2781] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Ramachary DB, Sakthidevi R, Shruthi KS. Asymmetric supramolecular catalysis: a bio-inspired tool for the high asymmetric induction in the enamine-based Michael reactions. Chemistry 2012; 18:8008-12. [PMID: 22649025 DOI: 10.1002/chem.201200962] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Indexed: 01/23/2023]
Abstract
King size: Utilization of large-size supramolecular rings in the pre-transition state (pre-TS) of enamine-based Michael reactions for high asymmetric induction is described. Enantiomerically pure, druglike hexahydroxanthenes with three contiguous stereocenters were synthesized through supramolecular catalysis by D-proline and quinine-NH-thiourea followed by reductive etherification from simple precursors under mild conditions (see scheme).
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21
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Biçer E, Yılmaz M, Karataş M, Pekel AT. Radical Cyclization Reactions via Manganese(III) Acetate Leading to 2-Thienyl-Substituted Dihydrofuran Compounds. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201100397] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Jenkins AD, Herath A, Song M, Montgomery J. Synthesis of Cyclopentenols and Cyclopentenones via Nickel-Catalyzed Reductive Cycloaddition. J Am Chem Soc 2011; 133:14460-6. [DOI: 10.1021/ja206722t] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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23
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Xie P, Wang L, Yang L, Li E, Ma J, Huang Y, Chen R. Domino Reaction for the Chemo- and Stereoselective Synthesis of trans-2,3-Dihydrobenzofurans from N-Thiophosphinyl Imines and Sulfur Ylides. J Org Chem 2011; 76:7699-705. [DOI: 10.1021/jo2008737] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peizhong Xie
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Liye Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Lihua Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Erqing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Jianze, Ma
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Ruyu Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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Xie P, Huang Y, Chen R. Phosphine-Catalyzed Domino Reaction: Highly Stereoselective Synthesis of trans-2,3-Dihydrobenzofurans from Salicyl N-Thiophosphinyl Imines and Allylic Carbonates. Org Lett 2010; 12:3768-71. [DOI: 10.1021/ol101611v] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Peizhong Xie
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Ruyu Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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25
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Coy ED, Jovanovic L, Sefkow M. One-pot, Pd-catalyzed synthesis of trans-dihydrobenzofurans from o-aminophenols. Org Lett 2010; 12:1976-9. [PMID: 20337490 DOI: 10.1021/ol100433z] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient and facile synthesis of trans-dihydrobenzofurans has been accomplished from o-aminophenols and phenylpropenes via a novel (one-pot) diastereoselective Pd-catalyzed oxyarylation reaction. The development and optimization of this method is described.
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Affiliation(s)
- Ericsson D Coy
- Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Química, Laboratorio de Investigación en Productos Naturales Vegetales, AA 14490, Cra 30 45-03, Bogotá, DC, Colombia
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26
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Pollini GP, Benetti S, De Risi C, Zanirato V. Hagemann's ester: a timeless building block for natural product synthesis. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.01.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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New neolignans and a phenylpropanoid glycoside from twigs of Miliusa mollis. Molecules 2010; 15:639-48. [PMID: 20335934 PMCID: PMC6256991 DOI: 10.3390/molecules15020639] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 01/20/2010] [Accepted: 01/22/2010] [Indexed: 11/16/2022] Open
Abstract
From the twigs of Miliusa mollis Pierre, three new compounds including (2S,3S)-2,3-dihydro-2-(4-methoxyphenyl)-3-methyl-5-[1(E)-propenyl]benzofuran, (7S,8S)- threo-Δ8′-4-methoxyneolignan and tyrosol-1-O-β-xylopyranosyl-(1→6)-O-β-gluco-pyranoside were isolated, along with seven known compounds. Their structures were elucidated through analysis of their spectroscopic data.
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28
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Snider BB. Mechanisms of Mn(OAc)(3)-based oxidative free-radical additions and cyclizations. Tetrahedron 2009; 65:10735-10744. [PMID: 20640037 PMCID: PMC2902773 DOI: 10.1016/j.tet.2009.09.025] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The mechanistic details of Mn(OAc)(3)-based oxidative free-radical additions and cyclizations are reviewed. The mechanisms of electron transfer to generate radicals, electron transfer to convert the radicals to oxidized products, and further oxidation of the products are covered.
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Affiliation(s)
- Barry B. Snider
- Department of Chemistry MS 015, Brandeis University, Waltham MA 02454-9110
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30
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Natori Y, Tsutsui H, Sato N, Nakamura S, Nambu H, Shiro M, Hashimoto S. Asymmetric synthesis of neolignans (-)-epi-conocarpan and (+)-conocarpan via Rh(II)-catalyzed C-H insertion process and revision of the absolute configuration of (-)-epi-conocarpan. J Org Chem 2009; 74:4418-21. [PMID: 19408907 DOI: 10.1021/jo900502d] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Catalytic asymmetric synthesis of neolignan natural products (-)-epi-conocarpan and (+)-conocarpan has been achieved by exploiting an enantio- and diastereoselective intramolecular C-H insertion reaction to construct a cis-2-aryl-2,3-dihydrobenzofuran ring system as a key step. The C-H insertion reaction of 5-bromoaryldiazoacetate catalyzed by Rh(2)(S-PTTEA)(4), a new dirhodium(II) carboxylate complex that incorporates N-phthaloyl-(S)-triethylalaninate as chiral bridging ligands, provided 2-aryl-5-bromo-3-methoxycarbonyl-2,3-dihydrobenzofuran with exceptionally high diastereoselectivity (cis/trans = 97:3) and high enantioselectivity for the cis isomer (84% ee).
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Affiliation(s)
- Yoshihiro Natori
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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31
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Mitasev B, Porco JA. Manganese(III)-mediated transformations of phloroglucinols: a formal oxidative [4 + 2] cycloaddition leading to bicyclo[2.2.2]octadiones. Org Lett 2009; 11:2285-8. [PMID: 19415907 DOI: 10.1021/ol900590t] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Manganese(III)-mediated oxidative transformations of dearomatized phloroglucinol (1,3,5-trihydroxybenzene) derivatives are reported. A number of cyclization modes have been observed, including polycyclization to afford bicyclo[2.2.2]octadiones via a formal oxidative radical [4 + 2] cycloaddition.
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Affiliation(s)
- Branko Mitasev
- Department of Chemistry and Center for Chemical Methodology and Library, Development, Boston University, Boston, Massachusetts 02215, USA
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32
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Malik S, Nadir UK, Pandey PS. Reactions of 2-hydroxyaryl-α,β-unsaturated ketones with dimethylsulfonium carbonylmethylides: a new and facile diastereoselective synthesis of 2,3-disubstituted dihydrobenzofurans. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.02.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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33
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Bérard D, Giroux MA, Racicot L, Sabot C, Canesi S. Intriguing formal [2+3] cycloaddition promoted by a hypervalent iodine reagent. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.114] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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34
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Clive DLJ, Stoffman EJL. Synthesis of (-)-conocarpan by two routes based on radical cyclization and establishment of its absolute configuration. Org Biomol Chem 2008; 6:1831-42. [PMID: 18452020 DOI: 10.1039/b801858h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two independent routes for the total synthesis of the bioactive neolignan (-)-conocarpan are described. The first (98% ee) is based on formal radical cyclization onto a benzene ring, and involves a 5-exo-trigonal closure onto a double bond restrained within a 6-membered ring. The second route (88% ee), which is shorter, is based on 5-exo-trigonal cyclization of an aryl radical onto a pendant terminal double bond. The two routes differ in their degree of stereoselectivity. The absolute configuration originally assigned to (+)-conocarpan had previously been called into question on the basis of empirical chiroptical rules; the present chemical work confirms the need for revision, and the assigned absolute configurations of several compounds correlated with (+)-conocarpan must also be changed.
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Affiliation(s)
- Derrick L J Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
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35
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Burgaz EV, Yılmaz M, Pekel AT, Öktemer A. Oxidative cyclization of 3-oxopropanenitriles with α,β-unsaturated amides by manganese(III) acetate. Regio- and stereoselective synthesis of 4-cyano-2,3-dihydrofuran-3-carboxamides. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.04.088] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Clive DLJ, Stoffman EJL. Total synthesis of (−)-conocarpan and assignment of the absolute configuration by chemical methods. Chem Commun (Camb) 2007:2151-3. [PMID: 17520119 DOI: 10.1039/b704211f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(-)-Conocarpan (1) was synthesized by a method based on radical cyclization, and the absolute configuration was established by chemical degradation; the original 2R,3R-assignment to (+)-conocarpan should be reversed, as suggested by a later chiroptical study of model 2,3-dihydrobenzofurans.
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Affiliation(s)
- Derrick L J Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta, CanadaT6G 2G2.
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38
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Shing TKM, Yeung YY. Synthetic Studies towards Pentacyclic Quassinoids: Total Synthesis of Unnatural (−)-14-epi-Samaderine E and Natural (−)-Samaderine Y from (S)-(+)-Carvone. Chemistry 2006; 12:8367-77. [PMID: 16927353 DOI: 10.1002/chem.200600669] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
First total syntheses of unnatural (-)-14-epi-samaderine E (5) and natural (-)-samaderine Y (2) were accomplished from (S)-(+)-carvone (6) in 18 and 21 steps, respectively. The syntheses are short, efficient (with an average yield of 80 % plus for each transformation), enantiospecific, and produce nine new chiral centers. The crucial points of the syntheses included a regioselective allylic oxidation on ring C, regio- and stereoselective reduction of ketone, a stereocontrolled epoxidation, an epoxymethano-bridge formation, a chemoselective Grignard reaction, an intramolecular Diels-Alder reaction, an intramolecular aldol addition, and a newly developed manganese(III)-catalyzed allylic oxidation on ring A.
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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Shing TKM, Yeung YY, Su PL. Mild Manganese(III) Acetate Catalyzed Allylic Oxidation: Application to Simple and Complex Alkenes. Org Lett 2006; 8:3149-51. [PMID: 16805574 DOI: 10.1021/ol0612298] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Manganese(III) acetate catalyzed allylic oxidation of alkenes to the corresponding enones was investigated, showing excellent regioselectivity and chemoselectivity (functional group compatibility). Delta(5)-Steroids were transformed into bioactive Delta(5)-en-7-ones under a nitrogen atmosphere, whereas simple alkenes were converted into the corresponding enones under an oxygen atmosphere in good yields.
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, China.
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40
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Alagoz O, Yılmaz M, Tarık Pekel A. Free Radical Cyclization of 1,3‐Dicarbonyl Compounds Mediated by Manganese(III) Acetate with Alkynes and Synthesis of Tetrahydrobenzofurans, Naphthalene, and Trifluoroacetyl Substituted Aromatic Compounds. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910500501516] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Barluenga J, Fañanás FJ, Sanz R, Marcos C. Intramolecular Carbolithiation of Allylo-Lithioaryl Ethers: A New Enantioselective Synthesis of Functionalized 2,3-Dihydrobenzofurans. Chemistry 2005; 11:5397-407. [PMID: 16003808 DOI: 10.1002/chem.200500377] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A new and easy method for the diastereoselective synthesis of 3-functionalized 2,3-dihydrobenzofuran derivatives from allyl 2-bromoaryl ethers is described. The key step of this transformation involves an intramolecular carbolithiation reaction of allyl 2-lithioaryl ethers. The substituents in both the allyl and the aryl moieties play an important and decisive role in stopping the reaction at the benzofuran thus avoiding a gamma-elimination reaction. Finally, this process is amenable to the synthesis of enantiomerically enriched compounds by using (-)-sparteine as a chiral inductor.
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Affiliation(s)
- José Barluenga
- Instituto Universitario de Química Organometálica Enrique Moles, Unidad Asociada al C.S.I.C., Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain.
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42
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Manganese(III) acetate based oxidative cyclizations of 3-oxopropanenitriles with conjugated alkenes and synthesis of 4,5-dihydrofuran-3-carbonitriles containing heterocycles. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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Kuethe JT, Wong A, Journet M, Davies IW. A Rapid Synthesis of 2-Aryl-5-substituted-2,3-dihydrobenzofurans. J Org Chem 2005; 70:3727-9. [PMID: 15845016 DOI: 10.1021/jo0500941] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] An effective strategy has been developed for the rapid and efficient one-pot synthesis of 2-aryl-5-substituted-2,3-dihydrobenzofurans from readily available o-nitrotoluenes and aromatic aldehydes. This strategy allows access to a structurally diverse array of products for further manipulation.
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Affiliation(s)
- Jeffrey T Kuethe
- Department of Process Research, Merck & Co., Inc., P.O. Box 2000, Rahway, New Jersey 07065, USA.
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Yılmaz M, Pekel AT. Manganese(III) acetate mediated synthesis of 3-trifluoroacetyl-4,5-dihydrofurans and 3-(dihydrofuran-2(3H)-ylidene)-1,1,1-trifluoroacetones by free radical cyclization. Part 1. J Fluor Chem 2005. [DOI: 10.1016/j.jfluchem.2005.02.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Reinvestigation of the synthetic and mechanistic aspects of Mn(III) acetate mediated oxidation of enones. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.039] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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47
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B. Snider B, Che Q. Oxidative Addition of Chloro- and Dichloroacetic Acid to Alkenes to Give a-Chloro- and a,a-Dichlorobutyrolactones with Manganese(III) Acetate. HETEROCYCLES 2004. [DOI: 10.3987/com-03-s(p)11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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48
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Pessini GL, Dias Filho BP, Nakamura CV, Cortez DAG. Antibacterial activity of extracts and neolignans from Piper regnellii (Miq.) C. DC. var. pallescens (C. DC.) Yunck. Mem Inst Oswaldo Cruz 2003; 98:1115-20. [PMID: 15049100 DOI: 10.1590/s0074-02762003000800025] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The evaluation of the activity of the aqueous and ethyl acetate extracts of the leaves of Piper regnellii was tested against gram-positive and gram-negative bacteria. The aqueous extract displayed a weak activity against Staphylococcus aureus and Bacillus subtilis with minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of 1000 micrograms/ml. The ethyl acetate extract presented a good activity against S. aureus and B. subtilis with MIC and MBC at 15.62 micrograms/ml. In contrast to the relative low MICs for gram-positive bacteria, gram-negative bacteria were not inhibited by the extracts at concentrations < or = 1000 mg/ml. The ethyl acetate extract was fractionated on silica gel into nine fractions. The hexane and chloroform fractions were active against S. aureus (MIC at 3.9 micrograms/ml) and B. subtilis (MIC at 3.9 and 7.8 micrograms/ml, respectively). Using bioactivity-directed fractionation, the hexane fraction was rechromatographed to yield the antimicrobial compounds 1, 2, 5, and 6 identified as eupomatenoid-6, eupomatenoid-5, eupomatenoid-3, and conocarpan, respectively. The pure compounds 1 and 2 showed a good activity against S. aureus with MIC of 1.56 micrograms/ml and 3.12 micrograms/ml, respectively. Both compounds presented MIC of 3.12 micrograms/ml against B. subtilis. The pure compound 6 named as conocarpan was quite active against S. aureus and B. subtilis with MIC of 6.25 micrograms/ml. The antibacterial properties of P. regnellii justify its use in traditional medicine for the treatment of wounds, contaminated through bacteria infections.
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Affiliation(s)
- Greisiele Lorena Pessini
- Departamento de Análises Clínicas, Universidade Estadual de Maringá, Av. Colombo 5790, 87020-900 Maringá, PR, Brasil
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Cheung WH, Zheng SL, Yu WY, Zhou GC, Che CM. Ruthenium porphyrin catalyzed intramolecular carbenoid C[bond]H insertion. Stereoselective synthesis of cis-disubstituted oxygen and nitrogen heterocycles. Org Lett 2003; 5:2535-8. [PMID: 12841774 DOI: 10.1021/ol034806q] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A ruthenium porphyrin-catalyzed stereoselective intramolecular carbenoid C[bond]H insertion is described. Using [Ru(II)(TTP)(CO)] as catalyst, aryl tosylhydrazones are converted to 2,3-dihydrobenzofurans, 2,3-dihydroindoles, and beta-lactams in good yields and remarkable cis selectivity (up to 99%). Enantioselective synthesis of 2,3-dihydrobenzofurans is also achieved with [Ru(II)(D(4)-Por*)(CO)] as catalyst, and up to 96% ee is attained.
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Affiliation(s)
- Wai-Hung Cheung
- Department of Chemistry and Open Laboratory of Chemical Biology of the Institute of Molecular Technology for Drug Discovery and Synthesis, The University of Hong Kong, Pokfulam Road, Hong Kong
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50
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Pal G, Venkateswaran RV. Synthesis of Neolignans from Anaxagorea Clavata. JOURNAL OF CHEMICAL RESEARCH 2003. [DOI: 10.3184/030823403103173273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A synthesis of the neolognans (1) and (2) is described employing an intramolecular Wittig cyclisation to generate the 2-arylbenzofuran ring system.
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Affiliation(s)
- Gautam Pal
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata -700 032, India
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