1
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Yang F, Wang L, Liang M, Zhang L, Fan B, Yao B. Pd-Catalyzed Asymmetric Allylation Reaction of 2-Aryl-3 H-indol-3-ones with Allyltrimethylsilane. J Org Chem 2024; 89:1873-1879. [PMID: 38241606 DOI: 10.1021/acs.joc.3c02599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
An efficient method for the first ene-reaction of 2-aryl-3H-indol-3-ones with allyltrimethylsilane has been developed for the first time. The reaction proceeded under the catalysis of Pd(OAc)2 and chiral phosphoric ligand L11 in the presence of Cu(CF3COO)2·XH2O, PivOH, and 5 Å molecular sieves in DMSO at 60 °C. The present methodology can avoid the impact of amine products generated by the reaction on the catalyst, and at the same time, the high catalytic activity of classical palladium catalysts still has catalytic ability for low electrophilic keto-imines. The desired products were furnished in excellent yields with good enantioselectivity.
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Affiliation(s)
- Fan Yang
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
| | - Lun Wang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Meiqi Liang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Linchun Zhang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Baomin Fan
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
- Department School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, People's Republic of China
| | - Bo Yao
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
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2
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C–O cleavage via InIII alkoxide intermediates: In situ 13C NMR analysis of the mechanism of an enantioselective in-mediated cyclopropanation reaction. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Evolution of Pauson-Khand Reaction: Strategic Applications in Total Syntheses of Architecturally Complex Natural Products (2016–2020). Catalysts 2020. [DOI: 10.3390/catal10101199] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Metal-mediated cyclizations are important transformations in a natural product total synthesis. The Pauson-Khand reaction, particularly powerful for establishing cyclopentenone-containing structures, is distinguished as one of the most attractive annulation processes routinely employed in synthesis campaigns. This review covers Co, Rh, and Pd catalyzed Pauson-Khand reaction and summarizes its strategic applications in total syntheses of structurally complex natural products in the last five years. Additionally, the hetero-Pauson-Khand reaction in the synthesis of heterocycles will also be discussed. Focusing on the panorama of organic synthesis, this review highlights the strategically developed Pauson-Khand reaction in fulfilling total synthetic tasks and its synthetic attractiveness is aimed to be illustrated.
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4
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Zhao MN, Zhang Y, Ge N, Yu L, Wang S, Ren ZH, Guan ZH. A Rh(iii)-catalyzed regioselective intermolecular oxa-Pauson–Khand reaction of alkynes, arylboronic acids and CO to form butenolides. Org Chem Front 2020. [DOI: 10.1039/c9qo01486a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A Rh(iii)-catalyzed regioselective intermolecular oxa-Pauson–Khand reaction of arylboronic acids, alkynes and CO for the synthesis of butenolides has been developed.
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Affiliation(s)
- Mi-Na Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Ying Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Ning Ge
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Le Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Shun Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
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5
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Manßen M, Schafer LL. Titanium catalysis for the synthesis of fine chemicals – development and trends. Chem Soc Rev 2020; 49:6947-6994. [DOI: 10.1039/d0cs00229a] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Atlas as a Titan(ium) is holding the earth-abundant chemistry world. Titanium is the second most abundant transition metal, is a key player in important industrial processes (e.g. polyethylene) and shows much promise for diverse applications in the future.
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Affiliation(s)
- Manfred Manßen
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
| | - Laurel L. Schafer
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
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6
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Kaur N, Verma Y, Grewal P, Bhardwaj P, Devi M. Application of titanium catalysts for the syntheses of heterocycles. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1606922] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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7
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Gong Y, Cao ZY, Shi YB, Zhou F, Zhou Y, Zhou J. A highly efficient Hg(OTf)2-mediated Sakurai–Hosomi allylation of N-tert-butyloxycarbonylamino sulfones, aldehydes, fluoroalkyl ketones and α,β-unsaturated enones using allyltrimethylsilane. Org Chem Front 2019. [DOI: 10.1039/c9qo01049a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cheap and easily available Hg(OTf)2 can efficiently mediate the Sakurai–Hosomi reaction of N-Boc amino sulfones, aldehydes, α-fluoroalkyl ketones and α,β-unsaturated enones using allyltrimethylsilane with the catalyst loading down to 0.5–5.0 mol%.
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Affiliation(s)
- Yi Gong
- College of Pharmacy
- Guiyang University of Chinese Medicine
- Guiyang 550025
- P. R. China
| | - Zhong-Yan Cao
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Ying-Bo Shi
- College of Chemistry and Material Sciences
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Feng Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Ying Zhou
- College of Pharmacy
- Guiyang University of Chinese Medicine
- Guiyang 550025
- P. R. China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai 200062
- P. R. China
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8
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Rao GHM. Studies towards the synthesis of hyperireflexolide A. Beilstein J Org Chem 2018; 14:2106-2111. [PMID: 30202464 PMCID: PMC6122383 DOI: 10.3762/bjoc.14.185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/25/2018] [Indexed: 11/23/2022] Open
Abstract
The first approach to hyperireflexolide A, based on the synthesis of γ-lactone-fused cyclopentane 5, a functionalized key intermediate, is presented. Compound 5 is involved in hydrolysis, α-allylation at C-8 and α-methylation at C-10 stereoselectively from the convex face. Then it is subjected to cross metathesis to give α,β-unsaturated ketone 11 as precursor in the total synthesis of hyperireflexolide A.
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Affiliation(s)
- G Hari Mangeswara Rao
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
- Department of Chemistry, Texila American University, Georgetown, Guyana
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9
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Davis-Gilbert ZW, Tonks IA. Titanium redox catalysis: insights and applications of an earth-abundant base metal. Dalton Trans 2018; 46:11522-11528. [PMID: 28795719 DOI: 10.1039/c7dt02319g] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
π-Acid ancillary ligands, reactants, or products can stabilize reactive low valent Ti intermediates through backbonding, and present opportunities for the development of vast new classes of Ti-catalyzed redox reactions with practical applications.
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10
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Caruano J, Muccioli GG, Robiette R. Biologically active γ-lactams: synthesis and natural sources. Org Biomol Chem 2018; 14:10134-10156. [PMID: 27748489 DOI: 10.1039/c6ob01349j] [Citation(s) in RCA: 253] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The γ-lactam moiety is present in a large number of natural and non-natural biologically active compounds. The range of biological activities covered by these compounds is very broad. Functionalized γ-lactams are thus of high interest and have great potential in medicinal chemistry. This review provides a description of the title compounds by focusing on their synthesis, natural sources and biological activities.
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Affiliation(s)
- J Caruano
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1 box L4.01.02, 1348 Louvain-la-Neuve, Belgium. and Louvain Drug Research Institute, Université catholique de Louvain, Av. E. Mounier 73 box B1.72.01, 1200 Brussels, Belgium
| | - G G Muccioli
- Louvain Drug Research Institute, Université catholique de Louvain, Av. E. Mounier 73 box B1.72.01, 1200 Brussels, Belgium
| | - R Robiette
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1 box L4.01.02, 1348 Louvain-la-Neuve, Belgium.
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11
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Kumar V, Chaudhary S, Mathur M, Swami AK, Malakar CC, Singh V. A Tandem Approach towards Diastereoselective Synthesis of Quinoline C-3 Tethered γ-Lactones. ChemistrySelect 2018. [DOI: 10.1002/slct.201702923] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Vipin Kumar
- Department of Chemistry; National Institute of Technology Jalandhar; 144011 Punjab India
| | - Sandeep Chaudhary
- Department of Chemistry; Malayiva National Institute of Technology Jaipur; 302015 India
| | - Manas Mathur
- Department of Advance Molecular Microbiology; Seminal Applied Sciences Pvt. Ltd.; Jaipur- 302015 India
| | - Ajit K. Swami
- Department of Advance Molecular Microbiology; Seminal Applied Sciences Pvt. Ltd.; Jaipur- 302015 India
| | - Chandi C. Malakar
- Department of Chemistry; National Institute of Technology Manipur; Imphal- 795004 India
| | - Virender Singh
- Department of Chemistry; National Institute of Technology Jalandhar; 144011 Punjab India
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12
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Abstract
γ-Butenolides, γ-butyrolactones, and derivatives, especially in enantiomerically pure form, constitute the structural core of numerous natural products which display an impressive range of biological activities which are important for the development of novel physiological and therapeutic agents. Furthermore, optically active γ-butenolides and γ-butyrolactones serve also as a prominent class of chiral building blocks for the synthesis of diverse biological active compounds and complex molecules. Taking into account the varying biological activity profiles and wide-ranging structural diversity of the optically active γ-butenolide or γ-butyrolactone structure, the development of asymmetric synthetic strategies for assembling such challenging scaffolds has attracted major attention from synthetic chemists in the past decade. This review offers an overview of the different enantioselective synthesis of γ-butenolides and γ-butyrolactones which employ catalytic amounts of metal complexes or organocatalysts, with emphasis focused on the mechanistic issues that account for the observed stereocontrol of the representative reactions, as well as practical applications and synthetic potentials.
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Affiliation(s)
- Bin Mao
- Stratingh Institute for Chemistry, University of Groningen , Nijenborg 4, 9747 AG Groningen, The Netherlands.,National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Martín Fañanás-Mastral
- Stratingh Institute for Chemistry, University of Groningen , Nijenborg 4, 9747 AG Groningen, The Netherlands.,Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela , Jenaro de la Fuente s/n, 15782 Santiago de Compostela, Spain
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen , Nijenborg 4, 9747 AG Groningen, The Netherlands
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13
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Tao C, Zhang J, Chen X, Wang H, Li Y, Cheng B, Zhai H. Formal Synthesis of (±)-Aplykurodinone-1 through a Hetero-Pauson-Khand Cycloaddition Approach. Org Lett 2017; 19:1056-1059. [PMID: 28218858 DOI: 10.1021/acs.orglett.7b00068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The tricyclic intermediate 2 has been synthesized in eight steps from known compound 6 in 20% overall yield. As such, this constitutes a highly efficient formal synthesis of (±)-aplykurodinone-1. This synthesis features a unique, one-pot, intramolecular hetero-Pauson-Khand reaction (h-PKR)/desilylation sequence to expeditiously construct the tricyclic framework, providing valuable insights for expanding the scope and boundaries of h-PKR.
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Affiliation(s)
- Cheng Tao
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Jing Zhang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University , Shenzhen 518055, China
| | - Xiaoming Chen
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University , Shenzhen 518055, China
| | - Huifei Wang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University , Shenzhen 518055, China
| | - Yun Li
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Bin Cheng
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Hongbin Zhai
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China.,Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University , Shenzhen 518055, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
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14
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Singh D, Devi N, Kumar V, Malakar CC, Mehra S, Rattan S, Rawal RK, Singh V. Natural product inspired design and synthesis of β-carboline and γ-lactone based molecular hybrids. Org Biomol Chem 2016; 14:8154-66. [PMID: 27511703 DOI: 10.1039/c6ob01216g] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
β-Carboline and γ-lactone moieties have been selected by nature as privileged scaffolds and display a wide range of pharmacological properties. Following nature, we envisaged the preparation of new β-carboline and γ-lactone based molecular hybrids incorporating both the pharmacophores. In this regard, a water-assisted In-mediated environmentally benign and easy to execute single-step tandem Barbier type allylation-lactonisation process has been devised in order to afford the targeted molecular architectures. It is anticipated that aqueous medium plays the key role in allylation as well as in the subsequent lactonisation process for the diastereo-selective synthesis of these conjugates. It is believed that water drives the reaction pathway through dual activation, it increases the electrophilic character of formyl and ester functionalities and simultaneously enhances the nucleophilic potential of the hydroxyl group to facilitate the in situ intramolecular condensation. Importantly, during this synthetic strategy no column chromatographic purification was required at any stage.
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Affiliation(s)
- Dharmender Singh
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT), Jalandhar, 144011, Punjab, India.
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15
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Miura H, Takeuchi K, Shishido T. Intermolecular [2+2+1] Carbonylative Cycloaddition of Aldehydes with Alkynes, and Subsequent Oxidation to γ-Hydroxybutenolides by a Supported Ruthenium Catalyst. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Intermolecular [2+2+1] Carbonylative Cycloaddition of Aldehydes with Alkynes, and Subsequent Oxidation to γ-Hydroxybutenolides by a Supported Ruthenium Catalyst. Angew Chem Int Ed Engl 2015; 55:278-82. [DOI: 10.1002/anie.201507814] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 09/20/2015] [Indexed: 11/07/2022]
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17
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Chirkin E, Michel S, Porée FH. Viability of a [2 + 2 + 1] Hetero-Pauson–Khand Cycloaddition Strategy toward Securinega Alkaloids: Synthesis of the BCD-Ring Core of Securinine and Related Alkaloids. J Org Chem 2015; 80:6525-8. [DOI: 10.1021/acs.joc.5b01118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Egor Chirkin
- Laboratoire de Pharmacognosie
UMR CNRS 8638, Faculté de Pharmacie, Université Paris Descartes, 4 Avenue de l’Observatoire, F-75006 Paris, France
| | - Sylvie Michel
- Laboratoire de Pharmacognosie
UMR CNRS 8638, Faculté de Pharmacie, Université Paris Descartes, 4 Avenue de l’Observatoire, F-75006 Paris, France
| | - François-Hugues Porée
- Laboratoire de Pharmacognosie
UMR CNRS 8638, Faculté de Pharmacie, Université Paris Descartes, 4 Avenue de l’Observatoire, F-75006 Paris, France
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18
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Wang H, Tang P, Zhou Q, Zhang D, Chen Z, Huang H, Qin Y. One-Pot Synthesis of Multisubstituted Butyrolactonimidates: Total Synthesis of (−)-Nephrosteranic Acid. J Org Chem 2015; 80:2494-502. [PMID: 25671631 DOI: 10.1021/jo5029166] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Huijing Wang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Pei Tang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Qilong Zhou
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Dan Zhang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Zhitao Chen
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Hongxiu Huang
- Key
Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Yong Qin
- Key
Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
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19
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Guo W, Cheng HG, Chen LY, Xuan J, Feng ZJ, Chen JR, Lu LQ, Xiao WJ. De NovoSynthesis of γ,γ-Disubstituted Butyrolactones through a Visible Light Photocatalytic Arylation-Lactonization Sequence. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400041] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Shashikumar ND, Krishnamurthy G, Bhojyanaik HS. A Facile Synthesis of Novel Cyclic Esters of γ-Keto Acid Derivatives by Heck Coupling Reaction. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1898] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - G. Krishnamurthy
- Department of Chemistry; Sahyadri Science College(Autonomous); Shimoga 577203 Karnataka India
| | - Halehatti S. Bhojyanaik
- Department of PG Studies and Research in Industrial Chemistry, School of Chemical Sciences; Kuvempu University; Shankaraghatta 577 451 Shimoga Karnataka India
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21
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Iwata T, Inagaki F, Mukai C. Progress in Carbonylative [2+2+1] Cycloaddition: Utilization of a Nitrile Group as the π Component. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305729] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Iwata T, Inagaki F, Mukai C. Progress in Carbonylative [2+2+1] Cycloaddition: Utilization of a Nitrile Group as the π Component. Angew Chem Int Ed Engl 2013; 52:11138-42. [DOI: 10.1002/anie.201305729] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Indexed: 12/21/2022]
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23
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Grillet F, Brummond KM. Enantioselective synthesis of 5,7-bicyclic ring systems from axially chiral allenes using a Rh(I)-catalyzed cyclocarbonylation reaction. J Org Chem 2013; 78:3737-54. [PMID: 23485149 PMCID: PMC3634128 DOI: 10.1021/jo4002432] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A transfer of chirality in an intramolecular Rh(I)-catalyzed allenic Pauson-Khand reaction (APKR) to access tetrahydroazulenones, tetrahydrocyclopenta[c]azepinones and dihydrocyclopenta[c]oxepinones enantioselectively (22-99% ee) is described. The substitution pattern of the allene affected the transfer of chiral information. Complete transfer of chirality was obtained for all trisubstituted allenes, but loss of chiral information was observed for disubstituted allenes. This work constitutes the first demonstration of a transfer of chiral information from an allene to the 5-position of a cyclopentenone using a cyclocarbonylation reaction. The absolute configuration of the corresponding cyclocarbonylation product was also established, something that is rarely done.
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Affiliation(s)
- Francois Grillet
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 USA
| | - Kay M. Brummond
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 USA
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24
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Devalankar DA, Karabal PU, Sudalai A. Optically pure γ-butyrolactones and epoxy esters via two stereocentered HKR of 3-substituted epoxy esters: a formal synthesis of (−)-paroxetine, Ro 67-8867 and (+)-eldanolide. Org Biomol Chem 2013; 11:1280-5. [DOI: 10.1039/c3ob27321k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Patel RM, Puranik VG, Argade NP. Regio- and stereoselective selenium dioxide allylic oxidation of (E)-dialkyl alkylidenesuccinates to (Z)-allylic alcohols: synthesis of natural and unnatural butenolides. Org Biomol Chem 2011; 9:6312-22. [PMID: 21792406 DOI: 10.1039/c1ob05709j] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first SeO(2) induced (Z)-selective allylic alcohol formation of dialkyl alkylidenesuccinates has been demonstrated to accomplish one-step syntheses of several essential butenolides and fused butenolides via an unusual E- to Z- carbon-carbon double bond isomerisation followed by the lactonization pathway. The observed regio- and stereoselective SeO(2) allylic oxidation protocol has also been extended to the diastereoselective total synthesis of bioactive natural product isomintlactone, its direct conversion to mintlactone and an example of the base-catalyzed intramolecular rearrangement of γ-lactone to δ-lactone.
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Affiliation(s)
- Ramesh M Patel
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune, India
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26
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Finnegan DF, Snapper ML. Formation of Polycyclic Lactones through a Ruthenium-Catalyzed Ring-Closing Metathesis/Hetero-Pauson–Khand Reaction Sequence. J Org Chem 2011; 76:3644-53. [DOI: 10.1021/jo200359c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David F. Finnegan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Marc L. Snapper
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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27
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Kim DE, Ratovelomanana‐Vidal V, Jeong N. 2,2′‐Bis[bis(3,5‐di‐tert‐butyl‐4‐methoxyphenyl)phosphino]‐6,6′‐dimethoxy‐1,1′‐biphenyl in Intramolecular Rhodium(I)‐Catalyzed Asymmetric Pauson–Khand‐Type Reactions. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000221] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dong Eun Kim
- Department of Chemistry, Korea University, 5 Anamdong, Seongbuk‐gu, Seoul, 136‐701, Korea, Fax: (+82)‐2‐3290‐3121; phone: (+82) 2‐3290‐3136
| | - Virginie Ratovelomanana‐Vidal
- Laboratoire Charles Friedel, UMR CNRS 7223, Chimie ParisTech ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France, Fax: (+33)‐144‐071‐062
| | - Nakcheol Jeong
- Department of Chemistry, Korea University, 5 Anamdong, Seongbuk‐gu, Seoul, 136‐701, Korea, Fax: (+82)‐2‐3290‐3121; phone: (+82) 2‐3290‐3136
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29
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Saito T, Furukawa N, Otani T. A facile synthesis of pyrrolo[2,3-b]quinolines via a Rh(i)-catalyzed carbodiimide-Pauson–Khand-type reaction. Org Biomol Chem 2010; 8:1126-32. [DOI: 10.1039/b924301a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Ho CY. Cyanative alkene–aldehyde coupling: Ni(0)–NHC–Et2AlCN mediated chromanol synthesis with high cis-selectivity at room temperature. Chem Commun (Camb) 2010; 46:466-8. [DOI: 10.1039/b918626c] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Reichard HA, McLaughlin M, Chen MZ, Micalizio GC. Regioselective Reductive Cross-Coupling Reactions of Unsymmetrical Alkynes. European J Org Chem 2010; 2010:391-409. [PMID: 24634606 PMCID: PMC3951371 DOI: 10.1002/ejoc.200901094] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Indexed: 12/17/2022]
Abstract
The present microreview summarizes our progress over the last few years in defining regioselective reductive cross-coupling reactions of unsymmetrical alkynes with terminal- and internal alkynes, aldehydes, and imines. We begin with a brief historical perspective of metal-mediated reductive dimerization reactions of aromatic alkynes and discuss the challenges associated with "crossed" versions of this mode of reactivity. Next, a collection of available methods that allow for regioselective reductive cross-coupling of internal alkynes with terminal and internal alkynes, aldehydes, and imines is summarized. After an examination of the requirements for regioselectivity in these cases, the logic behind our design of alkoxide-directed titanium-mediated reductive cross-coupling reactions is presented. A nomenclature is introduced to delineate the presumed mechanistic origin of regioselection associated with each reaction design, and a presentation of alkoxide-directed regioselective reductive cross-coupling reactions of alkynes follows. Throughout, principal issues related to reactivity and selectivity are discussed to assess scope and limitations of available methods and to describe the broad challenges that exist for defining complex fragment union reactions based on reductive cross-coupling chemistry.
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Affiliation(s)
| | | | | | - Glenn C. Micalizio
- Department of Chemistry, The Scripps Research Institute Scripps-Florida 130 Scripps Way #3A2 Jupiter, FL 33458 Fax: (561) 228-3092
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32
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Saito T, Sugizaki K, Osada H, Kutsumura N, Otani T. A Hetero Pauson-Khand Reaction of Ketenimines: A New Synthetic Method for γ-Exomethylene-α,β-unsaturated γ-Lactams. HETEROCYCLES 2010. [DOI: 10.3987/com-09-s(s)62] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Jiang X, Fu C, Ma S. Highly Stereoselective Iodolactonization of 4,5-Allenoic Acids-An Efficient Synthesis of 5-(1′-Iodo-1′(Z)-alkenyl)-4,5-dihydro-2(3H)-furanones. Chemistry 2008; 14:9656-64. [DOI: 10.1002/chem.200801363] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Kim DE, Kim IS, Ratovelomanana-Vidal V, Genêt JP, Jeong N. Asymmetric Pauson−Khand-type Reaction Mediated by Rh(I) Catalyst at Ambient Temperature. J Org Chem 2008; 73:7985-9. [DOI: 10.1021/jo801236c] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Eun Kim
- Department of Chemistry, Korea University, Seoul, 136-701, Korea, and Laboratoire de Synthèse Sélective Organique et Produits Naturels, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - In Su Kim
- Department of Chemistry, Korea University, Seoul, 136-701, Korea, and Laboratoire de Synthèse Sélective Organique et Produits Naturels, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Virginie Ratovelomanana-Vidal
- Department of Chemistry, Korea University, Seoul, 136-701, Korea, and Laboratoire de Synthèse Sélective Organique et Produits Naturels, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Jean-Pierre Genêt
- Department of Chemistry, Korea University, Seoul, 136-701, Korea, and Laboratoire de Synthèse Sélective Organique et Produits Naturels, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - Nakcheol Jeong
- Department of Chemistry, Korea University, Seoul, 136-701, Korea, and Laboratoire de Synthèse Sélective Organique et Produits Naturels, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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35
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Saito T, Nihei H, Otani T, Suyama T, Furukawa N, Saito M. Thiocarbonyl induced heterocumulenic Pauson–Khand type reaction: expedient synthetic method for thieno[2,3-b]indol-2-ones. Chem Commun (Camb) 2008:172-4. [DOI: 10.1039/b712739a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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A Highly Diastereoselective Cyclocarbonylation of Allene-Aldehyde Mediated by Mo(CO)6: Synthesis of Bicyclic Lactones. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.11.1921] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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37
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McLaughlin M, Takahashi M, Micalizio GC. An alkoxide-directed intermolecular [2+2+1] annulation: a three-component coupling reaction for the synthesis of tetrasubstituted alpha,beta-unsaturated gamma-lactams. Angew Chem Int Ed Engl 2007; 46:3912-4. [PMID: 17427164 PMCID: PMC4313383 DOI: 10.1002/anie.200605060] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Glenn C. Micalizio
- Prof. Glenn C. Micalizio, Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT 06520-8107 (USA), Fax: (+1)203-432-6144,
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38
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Kim DE, Choi C, Kim IS, Jeulin S, Ratovelomanana-Vidal V, Genêt JP, Jeong N. Electronic and Steric Effects of Atropisomeric Ligands SYNPHOS® and DIFLUORPHOS®vs. BINAPs in Rh(I)-Catalyzed Asymmetric Pauson–Khand Reaction. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600623] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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McLaughlin M, Takahashi M, Micalizio G. An Alkoxide-Directed Intermolecular [2+2+1] Annulation: A Three-Component Coupling Reaction for the Synthesis of Tetrasubstituted α,β-Unsaturated γ-Lactams. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200605060] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Baag MM, Puranik VG, Argade NP. Facile chemo-, regio-, and diastereoselective approach to cis-3,5-disubstituted gamma-butyrolactones and fused gamma-butyrolactones. J Org Chem 2007; 72:1009-12. [PMID: 17253824 DOI: 10.1021/jo0619128] [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: 11/29/2022]
Abstract
Chemoselective SN2' condensation of primary enolates of alkyl methyl ketones 2a-e with dimethyl bromomethylfumarate (1) followed by highly diastereoselective NaBH4 reduction of the ketone function in the formed ketodiesters 3a-e and the regioselective in situ lactonization of the unisolable intermediates 4a-e exclusively furnished the cis-3,5-disubstituted gamma-butyrolactones (+/-)-5a-e in very good yields. Similarly, the face-selective coupling reaction of cyclohexanone enolate with 1 to form a mixture of diastereomers in an 8:2 ratio followed by a highly selective reductive cyclization of 9 plus 10 exclusively provided the cis-octahydrobenzofuran (+/-)-12 in 70% overall yield.
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Affiliation(s)
- Md Merajuddin Baag
- Division of Organic Chemistry (Synthesis) and Centre for Material Characterization, National Chemical Laboratory, Pune 411 008, India
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41
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Ligand Exchange Processes on Solvated Lithium Cations. II. Complexation by Cryptands in γ-Butyrolactone as Solvent. J INCL PHENOM MACRO 2006. [DOI: 10.1007/s10847-006-9125-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Iridium-catalyzed cascade decarbonylation/highly enantioselective Pauson–Khand-type cyclization reactions. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.03.036] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Kwong F, Lee H, Qiu L, Lam W, Li YM, Kwong H, Chan A. Rhodium-BisbenzodioxanPhos Complex-Catalyzed Homogeneous Enantioselective Pauson-Khand-Type Cyclization in Alcoholic Solvents. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505105] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Seitz M, Reiser O. Synthetic approaches towards structurally diverse gamma-butyrolactone natural-product-like compounds. Curr Opin Chem Biol 2005; 9:285-92. [PMID: 15939330 DOI: 10.1016/j.cbpa.2005.03.005] [Citation(s) in RCA: 201] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Accepted: 03/29/2005] [Indexed: 11/20/2022]
Abstract
Natural products containing a gamma-butyrolactone ring are abundant in nature; however, few general synthetic approaches to their stereoselective synthesis with broad structural variety are known. In this article, recent developments towards mono- and polycyclic gamma-butyrolactone natural products and analogs are discussed. A special focus is given to asymmetric methods applying transition metal or organocatalysts that allow not only the efficient introduction of a broad variety of functional groups but ideally also the flexible construction of various natural-product-like, polycyclic scaffolds from common precursors.
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Affiliation(s)
- Michael Seitz
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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45
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Kwong FY, Li YM, Lam WH, Qiu L, Lee HW, Yeung CH, Chan KS, Chan ASC. Rhodium-Catalyzed Asymmetric Aqueous Pauson-Khand-Type Reaction. Chemistry 2005; 11:3872-80. [PMID: 15827980 DOI: 10.1002/chem.200401237] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An interesting rhodium-catalyzed asymmetric aqueous Pauson-Khand-type reaction was developed. A chiral atropisomeric dipyridyldiphosphane ligand was found to be highly effective in this system. This operationally simple protocol allows both catalyst and reactants to be handled under air without precautions. Various enynes were transformed to the corresponding bicyclic cyclopentenones in good yield and enantiomeric excess (up to 95 % ee). A study of the electronic effects of the enyne substrates revealed a correlation between the electronic properties of the substrates and the ee value obtained in the product of the Pauson-Khand-type reaction. A linear free-energy relationship was observed from a Hammett study.
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Affiliation(s)
- Fuk Yee Kwong
- Open Laboratory of Chirotechnology of the Institute of Molecular Technology for Drug Discovery and Synthesis, Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong.
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46
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Masia M, Rey R. Computational Study of γ-Butyrolactone and Li+/γ-butyrolactone in Gas and Liquid Phases. J Phys Chem B 2004. [DOI: 10.1021/jp046979i] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marco Masia
- Departament de Física i Enginyeria Nuclear, Universitat Politécnica de Catalunya, Campus Nord B4-B5, Barcelona 08034, Spain
| | - Rossend Rey
- Departament de Física i Enginyeria Nuclear, Universitat Politécnica de Catalunya, Campus Nord B4-B5, Barcelona 08034, Spain
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47
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Nakamura I, Yamamoto Y. Transition-Metal-Catalyzed Reactions in Heterocyclic Synthesis. Chem Rev 2004; 104:2127-98. [PMID: 15137788 DOI: 10.1021/cr020095i] [Citation(s) in RCA: 1294] [Impact Index Per Article: 64.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Itaru Nakamura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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48
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Dong C, Alper H. Enantioselective cyclocarbonylation of 2-vinylanilines to six-membered ring lactams. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2003.08.045] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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49
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Zhang J, Blazecka PG, Belmont D, Davidson JG. Reinvestigation of mucohalic acids, versatile and useful building blocks for highly functionalized alpha,beta-unsaturated gamma-butyrolactones. Org Lett 2002; 4:4559-61. [PMID: 12465937 DOI: 10.1021/ol027122b] [Citation(s) in RCA: 45] [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] Mucohalic acids (mucochloric acid (1, 3,4-dichloro-5-hydroxy-5H-furan-2-one) and mucobromic acid (2, 3,4-dibromo-5-hydroxy-5H-furan-2-one)) are inexpensive, commercially available starting materials with multiple functional groups. These compounds have been modified by way of reduction followed by Suzuki cross-coupling reactions involving arylboronic acids to afford highly functionalized alpha,beta-unsaturated gamma-butyrolactones in excellent yield. The synthetic utility of these building blocks was effectively demonstrated through preparation of the antiinflammatory drug Vioxx.
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Affiliation(s)
- Ji Zhang
- Chemical Research and Development, Pfizer, Inc., Ann Arbor, Michigan 48105, USA.
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50
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Quan LG, Cha JK. Reductive cyclization of enones by titanium(IV) aryloxide and a Grignard reagent. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01868-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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