1
|
Zhou Q, Ma X, Qiao JB, He WJ, Jiang MR, Shao H, Zhao YM. Total Synthesis of Ganoderma Meroterpenoids Cochlearol B and Its Congeners Driven by Structural Similarity and Biological Homology. Chemistry 2024; 30:e202400084. [PMID: 38228507 DOI: 10.1002/chem.202400084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 01/16/2024] [Indexed: 01/18/2024]
Abstract
Secondary metabolites that have the same biological origin must share some relationship in their biosynthesis. Exploring this relationship has always been a significant task for synthetic biologists. However, from the perspective of synthetic chemists, it is equally important to propose, prove, or refute potential biosynthetic pathways in order to elucidate and understand the biosynthesis of homologous secondary metabolites. In this study, driven by the high structural similarity between the homologous Ganoderma meroterpenoids cochlearol B and ganocin B, two chemically synthetic strategies were designed and investigated sequentially for the synthesis of cochlearol B from ganocin B. These strategies include intramolecular metal-catalyzed hydrogen atom transfer (MHAT) and intramolecular photochemical [2+2] cycloaddition. The aim was to reveal their potential biosynthetic conversion relationship using chemical synthesis methods. As a result, a highly efficient total synthesis of cochlearol B, cochlearol T, cochlearol F, as well as the formal total synthesis of ganocins A-B, and ganocochlearins C-D, has been achieved. Additionally, a novel synthetic approach for the synthesis of 6,6-disubstituted 6H-dibenzo[b,d]pyran and its analogues has been developed through palladium(II)-catalyzed Wacker-type/cross-coupling cascade reactions.
Collapse
Affiliation(s)
- Qin Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
| | - Xia Ma
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
| | - Jin-Bao Qiao
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
| | - Wen-Jing He
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
| | - Ming-Rui Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
| | - Hui Shao
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
| | - Yu-Ming Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Ave, Xi'an, 710119, China
- Xi'an Key Laboratory of Organometallic Material Chemistry & International Joint Research Center of Shaanxi Province for Organometallic Catalytic Chemistry, Shaanxi Normal University, Xi'an, 710119, China
| |
Collapse
|
2
|
Wang X, Shu S, Wang X, Luo R, Ming X, Wang T, Zhang Z. Access to Saturated Oxygen Heterocycles and Lactones via Electrochemical Sulfonylative Oxycyclization of Alkenes with Sulfonyl Hydrazides. J Org Chem 2023; 88:2505-2520. [PMID: 36751026 DOI: 10.1021/acs.joc.2c02966] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
A facile electrochemical sulfonylative cycloetherification of linear unsaturated alcohols with sulfonyl hydrazides under mild conditions has been accomplished. This catalyst- and oxidant-free protocol proceeds via electro-oxidation, followed by radical addition, as well as an intramolecular oxygen nucleophilic process. This methodology is compatible with a broad substrate scope and good functional group compatibility, which provides a valuable and convenient synthetic tool for the synthesis of saturated five-, six-, seven-, and eight-membered ring oxygen heterocycles. Furthermore, sulfonylative cycloesterification of linear unsaturated acids toward the lactone products has also been established under this electrochemical system. In addition, control experiments indicated that the N-H bonds of the sulfonyl hydrazide molecule are non-essential.
Collapse
Affiliation(s)
- Xiaoshuo Wang
- Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China
| | - Shubing Shu
- Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China
| | - Xiaojing Wang
- Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China
| | - Renshi Luo
- College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan 512005, P. R. China
| | - Xiayi Ming
- Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China
| | - Tao Wang
- Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China
| | - Zhenming Zhang
- Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China
| |
Collapse
|
3
|
Yadav SK, Jeganmohan M. Cobalt(III)-Catalyzed Regioselective [4 + 2]-Annulation of N-Chlorobenzamides with Substituted Alkenes. J Org Chem 2022; 87:13073-13088. [PMID: 36163013 DOI: 10.1021/acs.joc.2c01588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A Co(III)-catalyzed redox-neutral [4 + 2] annulation of N-chlorobenzamides/acrylamides with substituted alkenes at ambient temperature is demonstrated. Using this protocol, pharmaceutically important 3,4-dihydroisoquinolinone derivatives were synthesized in good yields. Intriguingly, the synthetically useful functional group of allylic coupling partners such as sulfonyl, carbonate, acetate, phosphate, amide, nitrile, and silane were retained in the final cyclized product. The present annulation reaction was compatible with various substituted benzamides and allylic coupling partners. To support the proposed reaction mechanism, competition experiments, deuterium labeling studies, and kinetic isotope effect studies were performed.
Collapse
Affiliation(s)
- Suresh Kumar Yadav
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Masilamani Jeganmohan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| |
Collapse
|
4
|
Berhane IA, Burde AS, Kennedy-Ellis JJ, Zurek E, Chemler SR. Copper-catalyzed enantioselective alkene carboetherification for the synthesis of saturated six-membered cyclic ethers. Chem Commun (Camb) 2021; 57:10099-10102. [PMID: 34518847 DOI: 10.1039/d1cc03515k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The enantioselective copper-catalyzed oxidative coupling of alkenols with styrenes for the construction of dihydropyrans, isochromans, pyrans and morpholines is reported. A concise formal synthesis of a σ1 receptor ligand using this alkene carboetherification methodology was demonstrated. Ligand, solvent and base all impact reaction efficiency. DFT transition state calculations are presented.
Collapse
Affiliation(s)
- Ilyas A Berhane
- Chemistry Department, Natural Science Complex, State University of New York at Buffalo, Buffalo, New York, 14260, USA.
| | - Ameya S Burde
- Chemistry Department, Natural Science Complex, State University of New York at Buffalo, Buffalo, New York, 14260, USA.
| | - Jonathan J Kennedy-Ellis
- Chemistry Department, Natural Science Complex, State University of New York at Buffalo, Buffalo, New York, 14260, USA.
| | - Eva Zurek
- Chemistry Department, Natural Science Complex, State University of New York at Buffalo, Buffalo, New York, 14260, USA.
| | - Sherry R Chemler
- Chemistry Department, Natural Science Complex, State University of New York at Buffalo, Buffalo, New York, 14260, USA.
| |
Collapse
|
5
|
Dong Y, Mei B, Zhang XP, Xu H. Selective Gram-Scale C-H Carbenoid Functionalization of N-Sulfonylarylamides with a Rhodium Catalyst. J Org Chem 2021; 86:11660-11672. [PMID: 34382402 DOI: 10.1021/acs.joc.1c01182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work describes an effective Cp*RhIII-catalyzed C-H carbenoid functionalization of N-sulfonylarylamides. Compared to the previous late-stage C-H modification methods of N-sulfonylarylamide analogues, this method efficiently achieves the gram-scale transformation with 2.5 mol % Rh-catalyst loading at 0 °C or with a 0.1 mol % Rh-catalyst loading at room temperature. The reaction medium has a great influence on the reaction rate. Methanol is optimal, and adding a nonpolar solvent (such as toluene or 1,2-dichloroethane) causes the rate to decrease. Experiments and density functional theory calculations were performed to rationalize the mechanism of rate control by a polar medium.
Collapse
Affiliation(s)
- Yi Dong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.,Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Bo Mei
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.,Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xue-Peng Zhang
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Heng Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.,Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| |
Collapse
|
6
|
Bary G, Jamil MI, Arslan M, Ghani L, Ahmed W, Ahmad H, Zaman G, Ayub K, Sajid M, Ahmad R, Huang D, Liu F, Wang Y. Regio- and stereoselective functionalization of alkenes with emphasis on mechanistic insight and sustainability concerns. JOURNAL OF SAUDI CHEMICAL SOCIETY 2021. [DOI: 10.1016/j.jscs.2021.101260] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
7
|
Abstract
Dihydropyrrolo[1,2-a]pyrazinone rings are a class of heterocycles present in a wide range of bioactive natural products and analogues thereof. As a direct result of their bioactivity, the synthesis of this privileged class of compounds has been extensively studied. This review provides an overview of these synthetic pathways. The literature is covered up until 2020 and is organized according to the specific strategies used to construct the scaffold: fusing a pyrazinone to an existing pyrrole, employing a pyrazinone-first strategy, an array of multicomponent reactions and some miscellaneous reactions.
Collapse
|
8
|
Song XF, Ding TM, Zhu D, Huang J, Chen ZM. Lewis-Acid-Mediated Intramolecular Trifluoromethylthiolation of Alkenes with Phenols: Access to SCF 3-Containing Chromane and Dihydrobenzofuran Compounds. Org Lett 2020; 22:7052-7056. [PMID: 32840107 DOI: 10.1021/acs.orglett.0c02744] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A Lewis-acid-mediated intramolecular trifluoromethylthiolation of alkenes with phenols that can offer direct access to SCF3-containing chromane and dihydrobenzofuran compounds was disclosed for the first time. Numerous SCF3-containing chromanes were obtained in moderate to good yields using γ-substituted 2-allyphenols as substrates. Meanwhile, various SCF3-containing dihydrobenzofurans with oxa-quaternary centers were also delivered in moderate to good yields using β-substituted 2-allyphenols as substrates.
Collapse
Affiliation(s)
- Xu-Feng Song
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Tong-Mei Ding
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Deng Zhu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jie Huang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zhi-Min Chen
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs and Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| |
Collapse
|
9
|
Iwasaki M, Kazao Y, Ishida T, Nishihara Y. Synthesis of Oxygen-Containing Heterocyclic Compounds by Iron-Catalyzed Alkylative Cyclization of Unsaturated Carboxylic Acids and Alcohols. Org Lett 2020; 22:7343-7347. [PMID: 32870016 DOI: 10.1021/acs.orglett.0c02671] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iron-catalyzed alkylative cyclization of alkenes bearing oxygen nucleophiles with secondary and tertiary alkyl bromides through carbon-carbon and carbon-oxygen bond formations has been developed. A broad substrate scope is an attractive feature of this synthetic method, providing a variety of potentially bioactive five- and six-membered oxygen-containing heterocycles. The reaction pathway is proposed to involve a radical addition of the in situ-formed alkyl radical to an alkene followed by carbon-oxygen bond-forming intramolecular cyclization.
Collapse
|
10
|
Sidorenko A, Kravtsova A, Mäki-Arvela P, Aho A, Sandberg T, Il'ina I, Li-Zhulanov N, Korchagina D, Volcho K, Salakhutdinov N, Murzin D, Agabekov V. Synthesis of isobenzofuran derivatives from renewable 2-carene over halloysite nanotubes. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110974] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
11
|
Maust MC, Croft ZL, Sullivan MW, Dove RL, Hardy EE, Brenzovich W. Aromatic substituent effects in palladium-catalyzed intramolecular olefin oxyarylation reactions. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
12
|
|
13
|
Shikora JM, Um C, Khoder ZM, Chemler SR. Saturated oxygen and nitrogen heterocycles via oxidative coupling of alkyltrifluoroborates with alkenols, alkenoic acids and protected alkenylamines. Chem Sci 2019; 10:9265-9269. [PMID: 32055311 PMCID: PMC7003886 DOI: 10.1039/c9sc02835h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 08/17/2019] [Indexed: 11/21/2022] Open
Abstract
The oxidative coupling of alkyltrifluoroborates with heteroatom-tethered vinylarenes leads to a broad range of saturated oxygen and nitrogen heterocycles.
Saturated heterocycles are important components of many bioactive compounds. The method disclosed herein enables a general route to a range of 5-, 6- and 7-membered oxygen and nitrogen heterocycles by coupling potassium alkyltrifluoroborates with heteroatom-tethered alkenes, predominantly styrenes, under copper-catalyzed conditions, in the presence of MnO2. The method was applied to the synthesis of the core of the anti-depressant drug citalopram. The reaction scope and observed reactivity is consistent with a polar/radical mechanism involving intermolecular addition of the alkyl radical to the alkene followed by [Cu(iii)]-facilitated C–O (or C–N) bond forming reductive elimination.
Collapse
Affiliation(s)
- Jonathan M Shikora
- Department of Chemistry , State University of New York at Buffalo , Natural Science Complex , Buffalo , New York 14260 , USA .
| | - Chanchamnan Um
- Department of Chemistry , State University of New York at Buffalo , Natural Science Complex , Buffalo , New York 14260 , USA .
| | - Zainab M Khoder
- Department of Chemistry , State University of New York at Buffalo , Natural Science Complex , Buffalo , New York 14260 , USA .
| | - Sherry R Chemler
- Department of Chemistry , State University of New York at Buffalo , Natural Science Complex , Buffalo , New York 14260 , USA .
| |
Collapse
|
14
|
Afanasyev OI, Kuchuk E, Usanov DL, Chusov D. Reductive Amination in the Synthesis of Pharmaceuticals. Chem Rev 2019; 119:11857-11911. [PMID: 31633341 DOI: 10.1021/acs.chemrev.9b00383] [Citation(s) in RCA: 313] [Impact Index Per Article: 62.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reductive amination plays a paramount role in pharmaceutical and medicinal chemistry owing to its synthetic merits and the ubiquitous presence of amines among biologically active compounds. It is one of the key approaches to C-N bond construction due to its operational easiness and a wide toolbox of protocols. Recent studies show that at least a quarter of C-N bond-forming reactions in the pharmaceutical industry are performed via reductive amination. This Review concisely compiles information on 71 medical substances that are synthesized by reductive amination. Compounds are grouped according to the principle of action, which includes drugs affecting the central nervous system, drugs affecting the cardiovascular system, anticancer drugs, antibiotics, antiviral and antifungal medicines, drugs affecting the urinary system, drugs affecting the respiratory system, antidiabetic medications, drugs affecting the gastrointestinal tract, and drugs regulating metabolic processes. A general synthetic scheme is provided for each compound, and the description is focused on reductive amination steps. The green chemistry metric of reaction mass efficiency was calculated for all reactions.
Collapse
Affiliation(s)
- Oleg I Afanasyev
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences , Vavilova St. 28 , Moscow 119991 , Russian Federation
| | - Ekaterina Kuchuk
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences , Vavilova St. 28 , Moscow 119991 , Russian Federation
| | - Dmitry L Usanov
- Broad Institute of MIT and Harvard , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| | - Denis Chusov
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences , Vavilova St. 28 , Moscow 119991 , Russian Federation.,National Research University Higher School of Economics , Miasnitskaya Str. 20 , Moscow 101000 , Russian Federation.,Peoples' Friendship University of Russia , 6 Miklukho-Maklaya Street , Moscow 117198 , Russian Federation
| |
Collapse
|
15
|
Xiong YS, Zhang B, Yu Y, Weng J, Lu G. Construction of Sulfonyl Phthalides via Copper-Catalyzed Oxysulfonylation of 2-Vinylbenzoic Acids with Sodium Sulfinates. J Org Chem 2019; 84:13465-13472. [DOI: 10.1021/acs.joc.9b01646] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yan-Shi Xiong
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Bin Zhang
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Yang Yu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| |
Collapse
|
16
|
Yang Y, Yuan F, Ren X, Wang G, Zhao W, Tang X, Guo M. Copper-Catalyzed Oxydifluoroalkylation of Hydroxyl-Containing Alkenes. J Org Chem 2019; 84:4507-4516. [DOI: 10.1021/acs.joc.9b00121] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yanyan Yang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Fangyuan Yuan
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangwei Ren
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Guangwei Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Wentao Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangyang Tang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Minjie Guo
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| |
Collapse
|
17
|
Smith CD, Phillips D, Tirla A, France DJ. Catalytic Isohypsic-Redox Sequences for the Rapid Generation of C sp3 -Containing Heterocycles. Chemistry 2018; 24:17201-17204. [PMID: 30203869 PMCID: PMC6391974 DOI: 10.1002/chem.201804131] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/10/2018] [Indexed: 12/12/2022]
Abstract
Cross‐coupling reactions catalyzed by transition metals are among the most influential in modern synthetic chemistry. The vast majority of transition‐metal‐catalyzed cross‐couplings rely on a catalytic cycle involving alternating oxidation and reduction of the metal center and are generally limited to forging just one type of new bond per reaction (e.g., the biaryl linkage formed during a Suzuki cross‐coupling). This work presents an Isohypsic‐Redox Sequence (IRS) that uses one metal to effect two catalytic cycles, thereby generating multiple new types of bonds from a single catalyst source. We show that the IRS strategy is amenable to several widely used transformations including the Suzuki–Miyaura coupling, Buchwald–Hartwig amination, and Wacker oxidation. Furthermore, each of these reactions generates value‐added heterocycles with significant sp3‐C (3‐dimensional) content. Our results provide a general framework for generating complex products by using a single metal to fulfill multiple roles. By uniting different combinations of reactions in the isohypsic and redox phases of the process, this type of catalytic multiple bond‐forming platform has the potential for wide applicability in the efficient synthesis of functional organic molecules.
Collapse
Affiliation(s)
- Craig D Smith
- WestChem School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - David Phillips
- WestChem School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Alina Tirla
- WestChem School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - David J France
- WestChem School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| |
Collapse
|
18
|
Phillips D, Hewitt JFM, France DJ. Synthesis of 3,3-Disubstituted Heterocycles by Pd-Catalyzed Arylallylation of Unactivated Alkenes. ACS OMEGA 2018; 3:8451-8459. [PMID: 31458973 PMCID: PMC6644603 DOI: 10.1021/acsomega.8b01021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 06/25/2018] [Indexed: 06/10/2023]
Abstract
Finding new methods of carbon-carbon bond formation is a key goal in expanding current methodology for heterocycle formation. Because of their inherently nonplanar shape, new methods of forming sp3-rich scaffolds are of particular importance. Although there are methods for combining heterocyclization and formation of new sp3-sp3 carbon-carbon bonds, these form the carbon-heteroatom bond rather than a carbon-carbon bond of the heterocycle. Here, we show a new alkene arylallylation reaction that generates a heterocycle with concomitant formation of two new carbon-carbon bonds. Furthermore, we demonstrate that this process occurs through an isohypsic (redox neutral) mechanism. Overall, this carboallylation reaction gives a new route to the synthesis of 3,3-disubstituted heterocycles.
Collapse
|
19
|
The use of marine-derived fungi for preparation of enantiomerically pure alcohols. Appl Microbiol Biotechnol 2017; 102:1317-1330. [DOI: 10.1007/s00253-017-8707-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/27/2017] [Accepted: 12/11/2017] [Indexed: 10/18/2022]
|
20
|
Lu B, Zhao M, Ding G, Xie X, Jiang L, Ratovelomanana-Vidal V, Zhang Z. Ruthenium-Catalyzed Enantioselective Hydrogenation/Lactonization of 2-Acylarylcarboxylates: Direct Access to Chiral 3-Substituted Phthalides. ChemCatChem 2017. [DOI: 10.1002/cctc.201700695] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bin Lu
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Mengmeng Zhao
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Guangni Ding
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Xiaomin Xie
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Lili Jiang
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Virginie Ratovelomanana-Vidal
- Institut de Recherche de Chimie Paris; IPSL Research University, Chimie ParisTech-CNRS; 11 rue Pierre et Marie Curie 75005 Paris France
| | - Zhaoguo Zhang
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
- Shanghai Institute of Organic Chemistry; Chines Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| |
Collapse
|
21
|
Huang J, Li J, Zheng J, Wu W, Hu W, Ouyang L, Jiang H. Dual Role of H 2O 2 in Palladium-Catalyzed Dioxygenation of Terminal Alkenes. Org Lett 2017. [PMID: 28621539 DOI: 10.1021/acs.orglett.7b01228] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed, environmentally friendly dioxygenation reaction of simple alkenes has been developed that enabled rapid assembly of valuable α-hydroxy ketones with high atom economy. Notably, control experiments and 18O isotope-labeling experiments established that H2O2 played a dominant dual role in this transformation.
Collapse
Affiliation(s)
- Jiuzhong Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Jia Zheng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Weigao Hu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Lu Ouyang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| |
Collapse
|
22
|
Xie J, Wang YW, Qi LW, Zhang B. Access to Aminated Saturated Oxygen Heterocycles via Copper-Catalyzed Aminooxygenation of Alkenes. Org Lett 2017; 19:1148-1151. [DOI: 10.1021/acs.orglett.7b00182] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian Xie
- State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Yue-Wei Wang
- State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Lian-Wen Qi
- State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Bo Zhang
- State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| |
Collapse
|
23
|
Ye L, Lo KY, Gu Q, Yang D. Pd-Catalyzed Intramolecular Aminoalkylation of Unactivated Alkenes: Access to Diverse N-Heterocycles. Org Lett 2017; 19:308-311. [PMID: 28045266 DOI: 10.1021/acs.orglett.6b03295] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly efficient palladium-catalyzed intramolecular aminoalkylation of unactivated alkenes in the absence of an external ligand and oxidant is described. New C-N and C(sp3)-C(sp3) bonds are formed simultaneously. This general transformation allows for construction of diverse N-heterocycles. Mechanistic studies show that the process may involve a four-membered Pd(alkyl)amido intermediate.
Collapse
Affiliation(s)
- Liu Ye
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, P. R. China
| | - Kai-Yip Lo
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, P. R. China
| | - Qiangshuai Gu
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, P. R. China
| | - Dan Yang
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, P. R. China
| |
Collapse
|
24
|
Sunsdahl B, Mickelsen K, Zabawa S, Anderson BK, Livinghouse T. 1,2-Disubstituted Alkenes as Migratory Insertion Participants in Zn(II)-Promoted Metalloamination/Cyclization of N,N-Dimethylhydrazinoalkenes. J Org Chem 2016; 81:10160-10164. [PMID: 27454875 DOI: 10.1021/acs.joc.6b01328] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diethylzinc-mediated metalloamination/cyclization of unsaturated N,N-dimethylhydrazines has been extended to the use of 1,2-disubstituted alkenes as N-Zn migratory insertion acceptors. Representative 2-arylethenes and vinylcyclopropanes readily serve as reaction participants in metalloamination/cyclization-allylation cascades.
Collapse
Affiliation(s)
- Bryce Sunsdahl
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - Ky Mickelsen
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - Sean Zabawa
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - Bryon K Anderson
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - Tom Livinghouse
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| |
Collapse
|
25
|
Phillips D, France DJ. Palladium-Catalyzed Heterocyclization: A Carbon-Centered Approach. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600410] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- David Phillips
- WestChem, School of Chemistry; University of Glasgow; University Avenue Glasgow G12 8QQ UK
| | - David J. France
- WestChem, School of Chemistry; University of Glasgow; University Avenue Glasgow G12 8QQ UK
| |
Collapse
|
26
|
Hutt JT, Wolfe JP. Synthesis of 2,3-Dihydrobenzofurans via the Palladium Catalyzed Carboalkoxylation of 2-Allylphenols. Org Chem Front 2016; 3:1314-1318. [PMID: 28392926 PMCID: PMC5382964 DOI: 10.1039/c6qo00215c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new Pd-catalyzed alkene carboalkoxylation strategy for the preparation of 2,3-dihydrobenzofurans is described. This method effects the coupling of readily available 2-allylphenol derivatives with aryl triflates to generate a wide range of functionalized 2,3-dihydrobenzofurans in good yields and diastereoselectivities (up to >20:1). Use of newly developed reaction conditions that promote anti-heteropalladation of the alkene is essential in order to generate products in high yield.
Collapse
Affiliation(s)
- Johnathon T Hutt
- University of Michigan, Department of Chemistry, 930 N. University Ave., Ann Arbor, MI, 48109-1055, USA
| | - John P Wolfe
- University of Michigan, Department of Chemistry, 930 N. University Ave., Ann Arbor, MI, 48109-1055, USA
| |
Collapse
|
27
|
Ha TM, Wang Q, Zhu J. Copper-catalysed cyanoalkylative cycloetherification of alkenes to 1,3-dihydroisobenzofurans: development and application to the synthesis of citalopram. Chem Commun (Camb) 2016; 52:11100-3. [PMID: 27546372 DOI: 10.1039/c6cc06356j] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A copper-catalysed cyanoalkylative cycloetherification of alkenes was developed. Heating a solution of substituted (2-vinylphenyl)methanol in MeCN/MeOH (v/v 7/3) in the presence of a catalytic amount of copper(ii) tetrafluoroborate hydrate [Cu(BF4)2·6H2O], bathophenanthroline, K3PO4, BnOH and (tBuO)2 afforded 1,3-dihydroisobenzofurans (phthalanes) via formation of one C(sp(3))-C(sp(3)) and one C(sp(3))-O bonds. A concise synthesis of citalopram, a marketed anti-depressant drug, was accomplished by applying this novel synthetic transformation.
Collapse
Affiliation(s)
- Tu M Ha
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015 Lausanne, Switzerland.
| | | | | |
Collapse
|
28
|
Camp JE. Auto-Tandem Catalysis: Activation of Multiple, Mechanistically Distinct Process by a Single Catalyst. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600803] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jason E. Camp
- Department of Chemical Sciences; University of Huddersfield; Queensgate Huddersfield United Kingdom
| |
Collapse
|
29
|
Benhamou L, Walker DW, Bučar DK, Aliev AE, Sheppard TD. Synthesis of substituted benzooxaborinin-1-ols via palladium-catalysed cyclisation of alkenyl- and alkynyl-boronic acids. Org Biomol Chem 2016; 14:8039-43. [PMID: 27506186 DOI: 10.1039/c6ob01419d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Two new palladium-catalysed reactions have been developed for the synthesis of stable 4-substituted benzooxaborinin-1-ols. A palladium-catalysed cyclisation of ortho-alkenylbenzene boronic acids can be used to access 4-chlorobenzooxaborinin-1-ols via a Wacker-type oxidation and chlorination. Alternatively, ortho-alkynylbenzene boronic acids undergo a palladium-catalysed oxyallylation reaction to provide 4-allylbenzooxaborinin-1-ols.
Collapse
Affiliation(s)
- Laure Benhamou
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20 Gordon St, London, WC1H 0AJ, UK.
| | | | | | | | | |
Collapse
|
30
|
Alamillo-Ferrer C, Karabourniotis-Sotti M, Kennedy AR, Campbell M, Tomkinson NCO. Alkene Dioxygenation with Malonoyl Peroxides: Synthesis of γ-Lactones, Isobenzofuranones, and Tetrahydrofurans. Org Lett 2016; 18:3102-5. [DOI: 10.1021/acs.orglett.6b01253] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Carla Alamillo-Ferrer
- WestCHEM,
Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Marianna Karabourniotis-Sotti
- WestCHEM,
Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Alan R. Kennedy
- WestCHEM,
Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Matthew Campbell
- GlaxoSmithKline
Medicines Research Centre, Gunnels
Wood Road, Stevenage SG1
2NY, United Kingdom
| | - Nicholas C. O. Tomkinson
- WestCHEM,
Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| |
Collapse
|
31
|
|
32
|
Faulkner A, Scott JS, Bower JF. An Umpolung Approach to Alkene Carboamination: Palladium Catalyzed 1,2-Amino-Acylation, -Carboxylation, -Arylation, -Vinylation, and -Alkynylation. J Am Chem Soc 2015; 137:7224-30. [PMID: 26020544 DOI: 10.1021/jacs.5b03732] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Conventional approaches to Pd-catalyzed alkene 1,2-carboamination rely upon the combination of a nucleophilic nitrogen-based component and an internal C-based or external oxidant. In this study, we outline an umpolung approach, which is triggered by oxidative initiation at an electrophilic N-based component and employs "standard" organometallic nucleophiles to introduce the new carbon-based fragment. Specifically, oxidative addition of a Pd(0)-catalyst into the N-O bond of O-pentafluorobenzoyl oxime esters generates imino-Pd(II) intermediates, which undergo 5-exo cyclization with sterically diverse alkenes. The resultant alkyl-Pd(II) intermediates are intercepted by organometallic nucleophiles or alcohols, under carbonylative or noncarbonylative conditions, to provide 1,2-carboamination products. This approach provides, for the first time, a unified strategy for achieving alkene 1,2-amino-acylation, -carboxylation, -arylation, -vinylation, and -alkynylation. For carbonylative processes, orchestrated protodecarboxylation of the pentafluorobenzoate leaving group underpins reaction efficiency. This process is likely a key feature in related Narasaka-Heck cyclizations and accounts for the efficacy of O-pentafluorobenzoyl oxime esters in aza-Heck reactions of this type.
Collapse
Affiliation(s)
- Adele Faulkner
- †School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - James S Scott
- ‡AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - John F Bower
- †School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| |
Collapse
|
33
|
Sun X, Li X, Song S, Zhu Y, Liang YF, Jiao N. Mn-Catalyzed Highly Efficient Aerobic Oxidative Hydroxyazidation of Olefins: A Direct Approach to β-Azido Alcohols. J Am Chem Soc 2015; 137:6059-66. [DOI: 10.1021/jacs.5b02347] [Citation(s) in RCA: 237] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xiang Sun
- State
Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue
Yuan Rd. 38, Beijing 100191, China
| | - Xinyao Li
- State
Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue
Yuan Rd. 38, Beijing 100191, China
| | - Song Song
- State
Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue
Yuan Rd. 38, Beijing 100191, China
| | - Yuchao Zhu
- State
Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue
Yuan Rd. 38, Beijing 100191, China
| | - Yu-Feng Liang
- State
Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue
Yuan Rd. 38, Beijing 100191, China
| | - Ning Jiao
- State
Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue
Yuan Rd. 38, Beijing 100191, China
- State
Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| |
Collapse
|
34
|
Wu W, Bi S, Liu Y, Tang Y, Li B. Insight into Pd-catalyzed branching cyclizations of enediyne-imides towards furo[2,3-b]pyridines: a DFT study. Org Biomol Chem 2015; 13:11539-49. [DOI: 10.1039/c5ob01991e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The DFT mechanisms for Pd-catalyzed branching cyclizations of cross-conjugated enediyne-imides towards furo[2,3-b]pyridines have been investigated to discover the crucial factors of controlling the chemo- and solvent-directed product selectivity.
Collapse
Affiliation(s)
- Weirong Wu
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
- Key Laboratory of Inorganic Chemistry in Universities of Shandong
| | - Siwei Bi
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Yuxia Liu
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Yanan Tang
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Bingwen Li
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| |
Collapse
|
35
|
Raveendra B, Das BG, Ghorai P. Organocatalytic, enantioselective, intramolecular oxa-Michael reaction of alkoxyboronate: a new strategy for enantioenriched 1-substituted 1,3-dihydroisobenzofurans. Org Lett 2014; 16:5580-3. [PMID: 25337660 DOI: 10.1021/ol502614n] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An unprecedented strategy for the synthesis of enantioenriched 1-substituted 1,3-dihydroisobenzofurans via an enantioselective oxa-Michael reaction of o-alkoxyboronate containing chalcone (II) has been accomplished employing cinchona alkaloid based squaramide bifunctional organocatalyst in the presence of proton source. The corresponding alkoxyboronate intermediates have been readily prepared in situ from o-formyl chalcones using neutral borane as hydride source and a tertiary amine moiety which is a counterpart of the catalyst.
Collapse
Affiliation(s)
- Barnala Raveendra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal 462066, India
| | | | | |
Collapse
|
36
|
Sunsdahl B, Smith AR, Livinghouse T. Intramolecular Metalloamination ofN,N-Dimethylhydrazinoalkenes: A Versatile Method to Access Functionalized Piperidines and Pyrrolidines. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407768] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
37
|
Sunsdahl B, Smith AR, Livinghouse T. Intramolecular Metalloamination ofN,N-Dimethylhydrazinoalkenes: A Versatile Method to Access Functionalized Piperidines and Pyrrolidines. Angew Chem Int Ed Engl 2014; 53:14352-6. [DOI: 10.1002/anie.201407768] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Indexed: 11/07/2022]
|
38
|
Li Z, Ling F, Cheng D, Ma C. Pd-Catalyzed Branching Cyclizations of Enediyne-Imides toward Furo[2,3-b]pyridines. Org Lett 2014; 16:1822-5. [DOI: 10.1021/ol500574b] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zexiang Li
- Department of Chemistry, Zhejiang University, 20 Yugu Road, Hangzhou 310027, P. R. China
| | - Fei Ling
- Department of Chemistry, Zhejiang University, 20 Yugu Road, Hangzhou 310027, P. R. China
| | - Dong Cheng
- Department of Chemistry, Zhejiang University, 20 Yugu Road, Hangzhou 310027, P. R. China
| | - Cheng Ma
- Department of Chemistry, Zhejiang University, 20 Yugu Road, Hangzhou 310027, P. R. China
| |
Collapse
|