1
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Pujol M, Méndez M, Fernández E. Stereoselective Control of the Cu Activation of β,β-Diboryl Acrylates for Allylic Coupling Protocols with Concomitant Lactonization. Org Lett 2024; 26:2821-2826. [PMID: 38101420 PMCID: PMC11020160 DOI: 10.1021/acs.orglett.3c03640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Accepted: 12/12/2023] [Indexed: 12/17/2023]
Abstract
The key to a successful C-B activation is to discriminate between two geminal boryl moieties that are exposed to the same reaction conditions. Here we describe a stereoselective C-B activation of β,β-diboryl acrylates forming exclusively the (Z)-α-borylalkenyl copper(I) key intermediate, for subsequent allylic alkylation reactions. The new borylated (Z)-skipped dienoates followed a feasible iodo-lactonization sequence for the preparation of borylated lactone cores, which can be used in drug discovery.
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Affiliation(s)
- Mireia Pujol
- Faculty
of Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
| | - María Méndez
- Sanofi
R&D, Integrated Drug Discovery, Industriepark Höchst, Building G838, 65926 Frankfurt am Main, Germany
| | - Elena Fernández
- Faculty
of Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
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2
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Wang T, Wang ZJ, Wang M, Wu L, Fang X, Liang Y, Lv J, Shi Z. Metal-Free Stereoconvergent C-H Borylation of Enamides. Angew Chem Int Ed Engl 2023; 62:e202313205. [PMID: 37721200 DOI: 10.1002/anie.202313205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/19/2023]
Abstract
Enamides, functional derivatives of enamines, play a significant role as synthetic targets. However, the stereoselective synthesis of these molecules has posed a longstanding challenge in organic chemistry, particularly for acyclic enamides that are less thermodynamically stable. In this study, we present a general strategy for constructing β-borylenamides by C-H borylation, which provides a versatile platform for generating the stereodefined enamides. Our approach involves the utilization of metalloid borenium cation, generated through the reaction of BBr3 and enamides in the presence of two different additives, avoiding any exogenous catalyst. Importantly, the stereoconvergent nature of this methodology allows for the use of starting materials with mixed E/Z configurations, thus highlighting the unique advantage of this chemistry. Mechanistic investigations have shed light on the pivotal roles played by the two additives, the reactive boron species, and the phenomenon of stereoconvergence.
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Affiliation(s)
- Tianhang Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Zheng-Jun Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
- Wenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Lei Wu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Xiaowu Fang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Jiahang Lv
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
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3
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Qian Y, Guo J, Tu Z, Coley CW, Barzilay R. RxnScribe: A Sequence Generation Model for Reaction Diagram Parsing. J Chem Inf Model 2023. [PMID: 37368970 DOI: 10.1021/acs.jcim.3c00439] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Reaction diagram parsing is the task of extracting reaction schemes from a diagram in the chemistry literature. The reaction diagrams can be arbitrarily complex; thus, robustly parsing them into structured data is an open challenge. In this paper, we present RxnScribe, a machine learning model for parsing reaction diagrams of varying styles. We formulate this structured prediction task with a sequence generation approach, which condenses the traditional pipeline into an end-to-end model. We train RxnScribe on a dataset of 1378 diagrams and evaluate it with cross validation, achieving an 80.0% soft match F1 score, with significant improvements over previous models. Our code and data are publicly available at https://github.com/thomas0809/RxnScribe.
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Affiliation(s)
- Yujie Qian
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jiang Guo
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Zhengkai Tu
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Connor W Coley
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Regina Barzilay
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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4
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Ano Y, Takahashi S, Chatani N. Palladium-Catalyzed 1,1-Alkynyloxygenation of 2-Vinylbenzoates with Alkynyl Bromides. Org Lett 2023; 25:3266-3270. [PMID: 37133260 DOI: 10.1021/acs.orglett.3c01008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The palladium-catalyzed reaction of alkyl 2-vinylbenzoates with silyl-protected alkynyl bromides leads to the selective production of 3-alkynylated isochroman-1-ones. The use of an alkyl ester group as an effective oxygen nucleophile is crucial for the efficient 1,1-alkynyloxygenation of alkenes.
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Affiliation(s)
- Yusuke Ano
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sakura Takahashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Research Center for Environmental Preservation, Osaka University, 2-4 Yamadaoka, Suita, Osaka 565-0871, Japan
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5
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Chutia K, Sarmah M, Gogoi P. Substituted Isocoumarins: An Assemble of Synthetic Strategies Towards 3-Substituted and 3,4-Disubstituted Isocoumarins. Chem Asian J 2023; 18:e202201240. [PMID: 36647281 DOI: 10.1002/asia.202201240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/18/2023]
Abstract
The versatility of isocoumarin frameworks offers the privilege to access many pharmacological targets. This unique heterocycle core present in many natural products and complex organic molecules contribute to medicinal chemistry as anti-cancer, anti-inflammatory and immunomodulatory agents. The attractive properties exhibited by its analogues urged the scientists to explore their synthetic analogues. In regard to the myriads of synthetic methodologies, we have compiled a review update covering all the articles that have been published towards the synthesis of 3-substituted and 3,4-disubstituted isocoumarins. Additionally, we have also highlighted a systematic survey of catalytic methods for their synthesis along with their scope towards diverse functionalizations and plausible mechanistic aspects.
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Affiliation(s)
- Kangkana Chutia
- Applied Organic Chemistry Group, Chemical Science and Technology Division CSIR-North East Institute of Science and Technology, NH 37, Pulibor, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India
| | - Manashi Sarmah
- Applied Organic Chemistry Group, Chemical Science and Technology Division CSIR-North East Institute of Science and Technology, NH 37, Pulibor, Jorhat, Assam, 785006, India
| | - Pranjal Gogoi
- Applied Organic Chemistry Group, Chemical Science and Technology Division CSIR-North East Institute of Science and Technology, NH 37, Pulibor, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India
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6
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Yuan K, Ingleson MJ. Haloboration of o-Alkynyl Phenols Generates Halogenated Bicyclic-Boronates. Angew Chem Int Ed Engl 2023; 62:e202301463. [PMID: 36856077 DOI: 10.1002/anie.202301463] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/02/2023]
Abstract
Benzoxaborinines are intermediates en-route to bicyclic boronates that are important active pharmaceutical ingredients (APIs). Herein, the haloboration of o-alkynyl-phenols using BX3 (X=Cl or Br) is disclosed as a route to form C4-X-benzoxaborinines with good functional group tolerance. Computational studies indicated that there are two similar in barrier mechanisms: (i) double alkyne haloboration followed by retro-haloboration; (ii) concerted trans-haloboration involving an exogenous chloride source. The C4-halide in these benzoxaborinines is useful, with a one-pot haloboration-Negishi cross coupling protocol effective to form benzoxaborinines with an alkyl or an aryl at C4. Therefore this method is a useful addition to the toolbox for synthesising bicyclic-boronates that are attracting increasing attention as APIs.
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Affiliation(s)
- Kang Yuan
- School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK
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7
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Gao QC, Li YF, Xuan J, Hu XQ. Practical synthesis of isocoumarins via Rh(III)-catalyzed C-H activation/annulation cascade. Beilstein J Org Chem 2023; 19:100-106. [PMID: 36761471 PMCID: PMC9907013 DOI: 10.3762/bjoc.19.10] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 01/16/2023] [Indexed: 01/31/2023] Open
Abstract
Herein, we report an unprecedented Rh(III)-catalyzed C-H activation/annulation cascade of readily available enaminones with iodonium ylides towards the convenient synthesis of isocoumarins. This coupling system proceeds in useful chemical yields (up to 93%) via a cascade C-H activation, Rh-carbenoid migratory insertion and acid-promoted intramolecular annulation. The success of gram-scale reaction and diverse functionalization of isocoumarins demonstrated the synthetic utility of this protocol.
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Affiliation(s)
- Qian-Ci Gao
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central Minzu University, Wuhan 430074, People’s Republic of China
| | - Yi-Fei Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central Minzu University, Wuhan 430074, People’s Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People’s Republic of China
| | - Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central Minzu University, Wuhan 430074, People’s Republic of China
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8
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Das BC, Yadav P, Das S, Saito M, Evans T. Development of a New Methodology for Dearomative Borylation of Coumarins and Chromenes and Its Applications to Synthesize Boron-Containing Retinoids. Molecules 2023; 28:1052. [PMID: 36770721 PMCID: PMC9921500 DOI: 10.3390/molecules28031052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/21/2023] Open
Abstract
Dearomative borylation of coumarins and chromenes via conjugate addition represents a relatively unexplored and challenging task. To address this issue, herein, we report a new and general copper (I) catalyzed dearomative borylation process to synthesize boron-containing oxacycles. In this report, the borylation of coumarins, chromones, and chromenes comprising functional groups, such as esters, nitriles, carbonyls, and amides, has been achieved. In addition, the method generates different classes of potential boron-based retinoids, including the ones with oxadiazole and anthocyanin motifs. The borylated oxacycles can serve as suitable intermediates to generate a library of compounds.
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Affiliation(s)
- Bhaskar C. Das
- Arnold and Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, NY 11201, USA
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
| | - Pratik Yadav
- Arnold and Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, NY 11201, USA
| | - Sasmita Das
- Arnold and Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, NY 11201, USA
| | - Mariko Saito
- Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
| | - Todd Evans
- Department of Surgery, Weill Cornell Medical College of Cornell University, New York, NY 10065, USA
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9
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A Catalyst‐ and Solvent‐ Free Synthesis of Tetra‐Substituted Pyrroles by Multicomponent Reaction. ChemistrySelect 2023. [DOI: 10.1002/slct.202204564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10
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Baird SR, Vogels CM, Geier SJ, Watanabe LK, Binder JF, Macdonald CLB, Westcott SA. The phosphinoboration of thiosemicarbazones. CAN J CHEM 2022. [DOI: 10.1139/cjc-2022-0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This study reports on the exploration of the phosphinoboration reaction with several thiosemicarbazones (R5R4NC(S)NR3N=CR1R2). Reactions between either Ph2PBpin (pin = 1,2-O2C2Me4) or Ph2PBcat (cat = 1,2-O2C6H4) with thiosemicarbazones containing a terminal primary or secondary amine afforded boron-containing heterocyclic 1,3,4-thiadiazoline products in excellent yield. The addition of Ph2PBpin to thiosemicarbazones containing an NMe2 group in the terminal position generated novel five-membered heterocycles in moderate yield, which included boron, sulfur, and nitrogen atoms. Heterocyclization of the thiosemicarbazones occurs preferentially in the presence of functional groups such as acetyl and pyridyl groups.
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Affiliation(s)
- Samuel R. Baird
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Stephen J. Geier
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Lara K. Watanabe
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
| | - Justin F. Binder
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
| | | | - Stephen A. Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
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11
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Tsutsui Y, Tanaka D, Manabe Y, Ikinaga Y, Yano K, Fukase K, Konishi A, Yasuda M. Synthesis of Cage‐Shaped Borates Bearing Pyrenylmethyl Groups: Efficient Lewis Acid Catalyst for Photoactivated Glycosylations Driven by Intramolecular Excimer Formation. Chemistry 2022; 28:e202202284. [DOI: 10.1002/chem.202202284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Yuya Tsutsui
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Daiki Tanaka
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Yoshiyuki Manabe
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
- Forefront Research Center Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Yuka Ikinaga
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Kumpei Yano
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Koichi Fukase
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
- Forefront Research Center Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Akihito Konishi
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI) Osaka University Suita Osaka 565-0871 Japan
- Center for Atomic and Molecular Technologies Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Makoto Yasuda
- Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI) Osaka University Suita Osaka 565-0871 Japan
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12
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Hazra S, Mahato S, Kanti Das K, Panda S. Transition-Metal-Free Heterocyclic Carbon-Boron Bond Formation. Chemistry 2022; 28:e202200556. [PMID: 35438817 DOI: 10.1002/chem.202200556] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 12/16/2022]
Abstract
Heteroaryl boronic acids and esters are extremely important and valuable intermediates because of their wide application in the synthesis of marketed drugs and bioactive compounds. Over the last couple of decades, the construction of highly important heteroaryl carbon-boron bonds has created huge attention. The transition-metal-free protocols are more green, less sensitive to air and moisture, and also economically advantageous over the transition-metal-based protocols. The transition-metal-free C-H borylation of heteroarenes and C-X (X=halogen) borylation of heteroaryl halides represents an excellent approach for their synthesis. Also, various cyclization and alkyne activation protocols have been recently established for their synthesis. The goal of this review article is to summarize the existing literature and the current state of the art for transition-metal-free synthesis of heteroaryl boronic acid and esters.
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Affiliation(s)
- Subrata Hazra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Somenath Mahato
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Kanak Kanti Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Santanu Panda
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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13
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Milián A, Fernández-Rodríguez MA, Merino E, Vaquero JJ, García-García P. Metal-Free Temperature-Controlled Regiodivergent Borylative Cyclizations of Enynes: BCl 3 -Promoted Skeletal Rearrangement. Angew Chem Int Ed Engl 2022; 61:e202205651. [PMID: 35510716 PMCID: PMC9401584 DOI: 10.1002/anie.202205651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Indexed: 12/04/2022]
Abstract
Metal‐free borylative cyclization of biphenyl‐embedded 1,3,5‐trien‐7‐ynes in the presence of simple and inexpensive BCl3 provided synthetically useful borylated building blocks. The outcome of the process depends on the reaction temperature, with borylated phenanthrenes obtained at 60 °C and phenanthrene‐fused borylated cyclobutanes formed at 0 °C. Based on DFT calculations, a mechanism for these novel transformations has been proposed, which involves an uncommon skeletal rearrangement, including migration of a methyl group and alkyne fragmentation, unprecedented in BCl3‐promoted cyclization reactions.
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Affiliation(s)
- Ana Milián
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Manuel A Fernández-Rodríguez
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Estíbaliz Merino
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Juan J Vaquero
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
| | - Patricia García-García
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia, Autovía A-II, Km 33.1, 28805-Alcalá de Henares, Madrid, Spain
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14
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Altarejos J, Valero A, Manzano R, Carreras J. Synthesis of Tri‐ and Tetrasubstituted Alkenyl Boronates from Alkynes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Julia Altarejos
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica SPAIN
| | - Antonio Valero
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica SPAIN
| | - Rubén Manzano
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica SPAIN
| | - Javier Carreras
- Universidad de Alcalá Facultad de Ciencias: Universidad de Alcala Facultad de Ciencias Química Orgánica y Química Inorgánica Carretera Madrid-Barcelona km 33,6, Campus Universitario.Facultad de Farmacia 28805 Alcalá de Henares SPAIN
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15
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Milián A, Fernández‐Rodríguez MA, Merino E, Vaquero JJ, García‐García P. Metal‐Free Temperature‐Controlled Regiodivergent Borylative Cyclizations of Enynes: BCl
3
‐Promoted Skeletal Rearrangement. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ana Milián
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica Instituto de Investigación Química “Andrés M. del Río” (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia Autovía A-II, Km 33.1 28805-Alcalá de Henares Madrid Spain
| | - Manuel A. Fernández‐Rodríguez
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica Instituto de Investigación Química “Andrés M. del Río” (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia Autovía A-II, Km 33.1 28805-Alcalá de Henares Madrid Spain
| | - Estíbaliz Merino
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica Instituto de Investigación Química “Andrés M. del Río” (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia Autovía A-II, Km 33.1 28805-Alcalá de Henares Madrid Spain
| | - Juan J. Vaquero
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica Instituto de Investigación Química “Andrés M. del Río” (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia Autovía A-II, Km 33.1 28805-Alcalá de Henares Madrid Spain
| | - Patricia García‐García
- Universidad de Alcalá (IRYCIS). Departamento de Química Orgánica y Química Inorgánica Instituto de Investigación Química “Andrés M. del Río” (IQAR). Campus Científico-Tecnológico, Facultad de Farmacia Autovía A-II, Km 33.1 28805-Alcalá de Henares Madrid Spain
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16
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Nishimoto Y. Development of Carbometalation and Oxymetalation by Using Moderate Lewis Acidity and π-Electrophilic Affinity of Heavy Main-group Metals. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yoshihiro Nishimoto
- Department of Applied Chemistry, Graduate School of Engineering and Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University
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17
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Dobler D, Leitner M, Moor N, Reiser O. 2‐Pyrone – A Privileged Heterocycle and Widespread Motif in Nature. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Daniel Dobler
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Michael Leitner
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Natalija Moor
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Oliver Reiser
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
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18
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Lv J, Zhang XJ, Wang M, Zhao Y, Shi Z. BBr 3 -Mediated P(III)-Directed C-H Borylation of Phosphines. Chemistry 2021; 28:e202104100. [PMID: 34878200 DOI: 10.1002/chem.202104100] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Indexed: 01/09/2023]
Abstract
Transition-metal-catalyzed C-H borylation has been widely used in the preparation of organoboron compounds. Here, we developed a general protocol on metal-free P(III)-directed C-H borylation of phosphines mediated by BBr3 , resulting in the formation of products bearing both phosphorus and boron. The development of the metal-free strategy to mimic previous metallic processes has shown low cost, superior practicality, and environmental friendliness. Density functional theory (DFT) calculations demonstrate the preferred pathway for this metal-free directed C-H borylation process.
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Affiliation(s)
- Jiahang Lv
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Xue-Jun Zhang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.,Department of Orthopedic Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210093, P. R. China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
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19
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Kaplan JA, Issaian A, Stang M, Gorial D, Blum SA. Repurposing π Electrophilic Cyclization/Dealkylation for Group Transfer. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joseph A. Kaplan
- Department of Chemistry University of California, Irvine Irvine CA 02697 USA
| | - Adena Issaian
- Department of Chemistry University of California, Irvine Irvine CA 02697 USA
| | - Martin Stang
- Department of Chemistry University of California, Irvine Irvine CA 02697 USA
| | - David Gorial
- Department of Chemistry University of California, Irvine Irvine CA 02697 USA
| | - Suzanne A. Blum
- Department of Chemistry University of California, Irvine Irvine CA 02697 USA
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20
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Kaplan JA, Issaian A, Stang M, Gorial D, Blum SA. Repurposing π Electrophilic Cyclization/Dealkylation for Group Transfer. Angew Chem Int Ed Engl 2021; 60:25776-25780. [PMID: 34585500 DOI: 10.1002/anie.202112351] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Indexed: 01/31/2023]
Abstract
A metal-free regio- and stereocontrolled group-transfer route toward the synthesis of trisubstituted alkenes is described. In this route, an electrophilic heterocyclization is followed by ring-opening group transfer. Specifically, a thioboration reaction transforms readily available alkynyl sulfide precursors into alkenyl boronates and alkenyl sulfides with defined regio- and stereochemistry in one synthetic step using commercially available B-chlorocatecholborane (ClBcat). Mechanistic studies identified the likely pathway as proceeding through zwitterionic rather than haloborated intermediates. The regio- and stereochemistry set in the initial cyclization step is preserved in the final acyclic alkene product, producing alkenes with up to four modifiable substituents with predictable regio- and stereochemistry. Downstream functionalization reactions showcase the versatility of the substitutions of the resulting alkenes. The mechanistic concept maps onto future reaction designs, given the abundance of known electrophiles and nucleophiles for electrophilic heterocyclization/dealkylation sequences.
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Affiliation(s)
- Joseph A Kaplan
- Department of Chemistry, University of California, Irvine, Irvine, CA, 02697, USA
| | - Adena Issaian
- Department of Chemistry, University of California, Irvine, Irvine, CA, 02697, USA
| | - Martin Stang
- Department of Chemistry, University of California, Irvine, Irvine, CA, 02697, USA
| | - David Gorial
- Department of Chemistry, University of California, Irvine, Irvine, CA, 02697, USA
| | - Suzanne A Blum
- Department of Chemistry, University of California, Irvine, Irvine, CA, 02697, USA
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21
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Ahmad T, Rasheed T, Hussain M, Rizwan K. Emergence of 2-Pyrone and Its Derivatives, from Synthesis to Biological Perspective: An Overview and Current Status. Top Curr Chem (Cham) 2021; 379:38. [PMID: 34554344 DOI: 10.1007/s41061-021-00350-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/27/2021] [Indexed: 10/20/2022]
Abstract
Pyrone moieties are present in natural products and can be synthesized by a diverse range of synthetic methods, resulting in the formation of various derivatives through chemical modifications. Many pyrone-based derivatives are commercially available and are biocompatible. They are building blocks of various intermediates in organic synthesis. They possess remarkable biological properties including antimicrobial, antiviral, cytotoxic, and antitumor activity. These characteristics have made them valuable for the development of drugs. We have summarized recent developments in the synthesis of 2-pyrone and its derivatives and their potential applications. With regard to synthetic approaches, the focus has been on metal-free and transition metal-catalyzed reactions.
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Affiliation(s)
- Tanveer Ahmad
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Tahir Rasheed
- Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia.
| | - Majid Hussain
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - Komal Rizwan
- Department of Chemistry, University of Sahiwal, Sahiwal, 57000, Pakistan
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22
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Gao C, Blum SA. Main-group metalated heterocycles through Lewis acid cyclization. TRENDS IN CHEMISTRY 2021. [DOI: 10.1016/j.trechm.2021.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Dong Z, Li P, Li X, Liu B. Rh(
III
)‐Catalyzed Diverse C—H Functionalization of Iminopyridinium Ylides. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100203] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Zhenzhen Dong
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang Henan 453007 China
| | - Pengfei Li
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang Henan 453007 China
| | - Xingwei Li
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang Henan 453007 China
| | - Bingxian Liu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University Xinxiang Henan 453007 China
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24
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Kulandai Raj AS, Narode AS, Liu RS. Gold(I)-Catalyzed Reactions between N-(o-Alkynylphenyl)imines and Vinyldiazo Ketones to Form 3-(Furan-2-ylmethyl)-1H-indoles via Postulated Azallyl Gold and Allylic Cation Intermediates. Org Lett 2021; 23:1378-1382. [DOI: 10.1021/acs.orglett.1c00038] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Antony Sekar Kulandai Raj
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
| | - Akshay Subhash Narode
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
| | - Rai-Shung Liu
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
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25
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Luo F, He S, Gou Q, Chen J, Zhang M. Rhodium-catalyzed oxidative coupling of benzoic acids with propargyl alcohols: An efficient access to isocoumarins. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Lipshultz JM, Fu Y, Liu P, Radosevich AT. Organophosphorus-catalyzed relay oxidation of H-Bpin: electrophilic C-H borylation of heteroarenes. Chem Sci 2020; 12:1031-1037. [PMID: 34163869 PMCID: PMC8179051 DOI: 10.1039/d0sc05620k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A nontrigonal phosphorus triamide (1, P{N[o-NMe-C6H4]2}) is shown to catalyze C–H borylation of electron-rich heteroarenes with pinacolborane (HBpin) in the presence of a mild chloroalkane reagent. C–H borylation proceeds for a range of electron-rich heterocycles including pyrroles, indoles, and thiophenes of varied substitution. Mechanistic studies implicate an initial P–N cooperative activation of HBpin by 1 to give P-hydrido diazaphospholene 2, which is diverted by Atherton–Todd oxidation with chloroalkane to generate P-chloro diazaphospholene 3. DFT calculations suggest subsequent oxidation of pinacolborane by 3 generates chloropinacolborane (ClBpin) as a transient electrophilic borylating species, consistent with observed substituent effects and regiochemical outcomes. These results illustrate the targeted diversion of established reaction pathways in organophosphorus catalysis to enable a new mode of main group-catalyzed C–H borylation. A nontrigonal phosphorus triamide (1, P{N[o-NMe-C6H4]2}) is shown to catalyze C–H borylation of electron-rich heteroarenes with pinacolborane (HBpin) in the presence of a mild chloroalkane reagent.![]()
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Affiliation(s)
- Jeffrey M Lipshultz
- Department of Chemistry, Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Yue Fu
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Alexander T Radosevich
- Department of Chemistry, Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
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27
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Plunkett S, DeRatt LG, Kuduk SD, Balsells J. Synthesis of 4-Alkylated Isocoumarins via Pd-Catalyzed α-Arylation Reaction. Org Lett 2020; 22:7662-7666. [PMID: 32969657 DOI: 10.1021/acs.orglett.0c02851] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A convergent method for the rapid preparation of substituted isocoumarins is reported. The transformation takes advantage of a spontaneous intramolecular cyclization that follows the Pd-catalyzed α-arylation of aldehydes with 2-halobenzoic esters. The reaction uses an air-stable, single-component palladium catalyst and provides access to 4-alkylated isocoumarins in one step from commercial starting materials. The applicability of the method using both cyclic and linear ketones as well as transformations of the isocoumarin core is also demonstrated.
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Affiliation(s)
- Shane Plunkett
- Discovery Process Research, Janssen R&D, 1400 McKean Road, Spring House, Pennsylvania 19477, United States
| | - Lindsey G DeRatt
- Discovery Chemistry, Janssen R&D, 1400 McKean Road, Spring House, Pennsylvania 19477, United States
| | - Scott D Kuduk
- Discovery Chemistry, Janssen R&D, 1400 McKean Road, Spring House, Pennsylvania 19477, United States
| | - Jaume Balsells
- Discovery Process Research, Janssen R&D, 1400 McKean Road, Spring House, Pennsylvania 19477, United States
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28
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Dasgupta A, Stefkova K, Babaahmadi R, Gierlichs L, Ariafard A, Melen RL. Triarylborane-Catalyzed Alkenylation Reactions of Aryl Esters with Diazo Compounds. Angew Chem Int Ed Engl 2020; 59:15492-15496. [PMID: 32485034 PMCID: PMC7497215 DOI: 10.1002/anie.202007176] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Indexed: 11/08/2022]
Abstract
Herein we report a facile, mild reaction protocol to form carbon-carbon bonds in the absence of transition metal catalysts. We demonstrate the metal-free alkenylation reactions of aryl esters with α-diazoesters to give highly functionalized enyne products. Catalytic amounts of tris(pentafluorophenyl)borane (10-20 mol %) are employed to afford the C=C coupled products (31 examples) in good to excellent yields (36-87 %). DFT studies were used to elucidate the mechanism for this alkenylation reaction.
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Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3AT, Cymru/WalesUK
| | - Katarína Stefkova
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3AT, Cymru/WalesUK
| | - Rasool Babaahmadi
- School of Natural Sciences – ChemistryUniversity of TasmaniaPrivate Bag 75Hobart, Tasmania7001Australia
| | - Lukas Gierlichs
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3AT, Cymru/WalesUK
| | - Alireza Ariafard
- School of Natural Sciences – ChemistryUniversity of TasmaniaPrivate Bag 75Hobart, Tasmania7001Australia
| | - Rebecca L. Melen
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3AT, Cymru/WalesUK
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29
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Domaradzki ME, Liu X, Ong J, Yu G, Zhang G, Simantov A, Perl E, Chen Y. Triflic acid mediated sequential cyclization of ortho-alkynylarylesters with ammonium acetate. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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30
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Dasgupta A, Stefkova K, Babaahmadi R, Gierlichs L, Ariafard A, Melen RL. Triarylboran‐katalysierte Alkenylierungen von Arylestern mit Diazoverbindungen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007176] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT, Cymru/Wales UK
| | - Katarína Stefkova
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT, Cymru/Wales UK
| | - Rasool Babaahmadi
- School of Natural Sciences-Chemistry University of Tasmania Private Bag 75 Hobart, Tasmania 7001 Australien
| | - Lukas Gierlichs
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT, Cymru/Wales UK
| | - Alireza Ariafard
- School of Natural Sciences-Chemistry University of Tasmania Private Bag 75 Hobart, Tasmania 7001 Australien
| | - Rebecca L. Melen
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT, Cymru/Wales UK
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31
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Abstract
In contrast to previously reported borylative heterocyclization methods, a reaction here proceeds without air-free techniques to access synthetically useful borylated thiophenes, benzothiophenes, and isocoumarins. A comparison of stability/decomposition rates in air of several catecholboronic ester (Bcat) compounds derived from different heterocycle cores showed a strong dependence on the heterocycle structure. Lessons learned from this comparison were then harnessed for the development of borylative heterocyclization reactions under ambient-atmosphere conditions and with wet solvent. In contrast to literature reports suggesting general moisture sensitivity, a subset of Bcat products resulting from this technique were chromatography-stable and directly isolable, obviating the requirement for an extra synthetic transformation into more stable boron species, such as pinacolboronic esters (Bpin), for isolation. The isolated Bcat products were amenable to various downstream functionalization reactions, including reactions that were not accessible with their better-known Bpin counterparts, showing the complementarity of Bcat reaction partners and expanding their known chemistry. These results suggest the value of conceptual revisitation of substitution and solvent influence on stability and isolability of organo-Bcat compound classes and lay the groundwork for development of additional practical borylative methods in air.
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Affiliation(s)
- Chao Gao
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Shuichi Nakao
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Suzanne A Blum
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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32
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Zhou K, Geng J, Wang D, Zhang J, Zhao Y. An Indirect Strategy for Trifluoromethylation via an Iridium Catalyst: Approach to Generate Isocoumarin Skeletons in Bioactive Molecules. Org Lett 2020; 22:5109-5114. [PMID: 32551685 DOI: 10.1021/acs.orglett.0c01700] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
3-Bromo-1,1,1-trifluoroacetone was first disclosed as an effective indirect trifluoromethylation reagent to construct the important 3-trifluoromethyl isocoumarin skeleton. The reaction proceeds through a ligand-promoted, iridium-catalyzed ortho-selective C-H alkylation of benzoic acid and an intermolecular cyclization reaction promoted by silver acetate. A wide range of 3-trifluoromethyl isocoumarins can be easily obtained in moderate to good yields. Importantly, the isocoumarin skeleton can be easily formed in bioactive compounds, highlighting the importance of this reaction.
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Affiliation(s)
- Kehan Zhou
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, P. R. China.,Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Jingyao Geng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Dongjie Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Jingyu Zhang
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, P. R. China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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33
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Yang CH, Han M, Li W, Zhu N, Sun Z, Wang J, Yang Z, Li YM. Direct Intramolecular Aminoboration of Allenes. Org Lett 2020; 22:5090-5093. [DOI: 10.1021/acs.orglett.0c01685] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Chun-Hua Yang
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Meng Han
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Wenyan Li
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Ningning Zhu
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Zhenzhen Sun
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Junjie Wang
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Zhantao Yang
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, 436 Xian’ge Road, Anyang 455000, People’s Republic of China
| | - Yue-Ming Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, 38 Tongyan Road, Tianjin 300353, People’s Republic of China
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34
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Nishimoto Y, Yasuda M. Carbometalation and Heterometalation of Carbon-Carbon Multiple-Bonds Using Group-13 Heavy Metals: Carbogallation, Carboindation, Heterogallation, and Heteroindation. Chem Asian J 2020; 15:636-650. [PMID: 32011097 PMCID: PMC7155119 DOI: 10.1002/asia.201901730] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/16/2020] [Indexed: 02/06/2023]
Abstract
Organogallium and -indium compounds are useful reagents in organic synthesis because of their moderate stability, efficient reactivity and high chemoselectivity. Carbogallation and -indation of a carbon-carbon multiple bond achieves the simultaneous formation of carbon-carbon and carbon-metal bonds. Heterogallation and -indation construct carbon-heteroatom and carbon-metal bonds. Therefore, these reaction systems represent a significant synthetic method for organogalliums and -indiums. Many chemists have attempted to apply various types of unsaturated compounds such as alkynes, alkenes, and allenes to these reaction systems. This minireview provides an overview of carboindation and -gallation as well as heteroindation and -gallation.
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Affiliation(s)
- Yoshihiro Nishimoto
- Department of Applied Chemistry Graduate School of EngineeringOsaka University 2-1 Yamadaoka, Suita565-0871OsakaJapan
| | - Makoto Yasuda
- Department of Applied Chemistry Graduate School of EngineeringOsaka University 2-1 Yamadaoka, Suita565-0871OsakaJapan
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35
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Kumar A, Prabhu KR. Rhodium(III)-Catalyzed C-H Activation: A Cascade Approach for the Regioselective Synthesis of Fused Heterocyclic Lactone Scaffolds. J Org Chem 2020; 85:3548-3559. [PMID: 31994394 DOI: 10.1021/acs.joc.9b03266] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A Rh(III)-catalyzed cascade C-H activation; regioselective [4 + 2] oxidative annulation; and lactonization of aromatic acids, anhydrides, and acrylic acid derivatives with 4-hydroxy-2-alkynoates have been disclosed. This strategy leads to fused heterocyclic lactone scaffolds in a single step with moderate functional group tolerance and excellent site selectivity. Besides, in one step, an antipode of the cephalosol intermediate natural product that contains a tricyclic isocoumarin framework has been synthesized.
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Affiliation(s)
- Anil Kumar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
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36
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Huang Y, Zhang X, Dong X, Zhang X. Iridium‐Catalyzed Cycloisomerization of Alkynoic Acids: Synthesis of Unsaturated Lactones. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901322] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yi Huang
- Key Laboratory of Biomedical PolymersEngineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan Hubei 430072 People's Republic of China
| | - Xianghe Zhang
- Key Laboratory of Biomedical PolymersEngineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan Hubei 430072 People's Republic of China
| | - Xiu‐Qin Dong
- Key Laboratory of Biomedical PolymersEngineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan Hubei 430072 People's Republic of China
| | - Xumu Zhang
- Key Laboratory of Biomedical PolymersEngineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan Hubei 430072 People's Republic of China
- Department of Chemistry, Southern University of Science and TechnologyShenzhen Grubbs Institute, Shenzhen Guangdong 518055 People's Republic of China
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37
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Kumar G, Qu ZW, Ghosh S, Grimme S, Chatterjee I. Boron Lewis Acid-Catalyzed Regioselective Hydrothiolation of Conjugated Dienes with Thiols. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04647] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Gautam Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstrasse 4, 53115 Bonn, Germany
| | - Soumen Ghosh
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstrasse 4, 53115 Bonn, Germany
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
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38
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Zhou M, Peng Z, Wang H, Wang Z, Hao D, Li L. Ruthenium(II)‐Catalyzed Homocoupling of Weakly Coordinating Sulfoxonium Ylides via C−H Activation/Annulations: Synthesis of Functionalized Isocoumarins. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900764] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ming‐Dong Zhou
- School of Chemistry and Materials ScienceLiaoning Shihua University Fushun 113001 People's Republic of China
| | - Zhen Peng
- School of Chemistry and Materials ScienceLiaoning Shihua University Fushun 113001 People's Republic of China
| | - He Wang
- School of Chemistry and Materials ScienceLiaoning Shihua University Fushun 113001 People's Republic of China
| | - Zhao‐Hui Wang
- School of Chemistry and Materials ScienceLiaoning Shihua University Fushun 113001 People's Republic of China
| | - Da‐Jin Hao
- School of Chemistry and Materials ScienceLiaoning Shihua University Fushun 113001 People's Republic of China
| | - Lei Li
- School of Chemistry and Materials ScienceLiaoning Shihua University Fushun 113001 People's Republic of China
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39
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Yata T, Kita Y, Nishimoto Y, Yasuda M. Regioselective Synthesis of 5-Metalated 2-Pyrones by Intramolecular Oxymetalation of Carbonyl-ene-yne Compounds Using Indium Trihalide. J Org Chem 2019; 84:14330-14341. [DOI: 10.1021/acs.joc.9b02186] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Tetsuji Yata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuji Kita
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yoshihiro Nishimoto
- Frontier Research Base for Global Young Researchers, Center for Open Innovation Research and Education (COiRE), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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40
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Guru MM, De S, Dutta S, Koley D, Maji B. B(C 6F 5) 3-catalyzed dehydrogenative cyclization of N-tosylhydrazones and anilines via a Lewis adduct: a combined experimental and computational investigation. Chem Sci 2019; 10:7964-7974. [PMID: 31853352 PMCID: PMC6839809 DOI: 10.1039/c9sc02492a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 07/05/2019] [Indexed: 12/19/2022] Open
Abstract
Tris(pentafluorophenyl)borane-catalyzed dehydrogenative-cyclization of N-tosylhydrazones with aromatic amines has been disclosed. This metal-free catalytic protocol is compatible with a range of functional groups to provide both symmetrical and unsymmetrical 3,4,5-triaryl-1,2,4-triazoles. Mechanistic experiments and density functional theory (DFT) studies suggest an initial Lewis adduct formation of N-tosylhydrazone with B(C6F5)3 followed by sequential intermolecular amination of the borane adduct with aniline, intramolecular cyclization and frustrated Lewis pair (FLP)-catalyzed dehydrogenation for the generation of substituted 1,2,4-triazoles.
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Affiliation(s)
- Murali Mohan Guru
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , India . ;
| | - Sriman De
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , India . ;
| | - Sayan Dutta
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , India . ;
| | - Debasis Koley
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , India . ;
| | - Biplab Maji
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , India . ;
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41
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Zhang X, Wan X, Cong Y, Zhen X, Li Q, Zhang-Negrerie D, Du Y, Zhao K. Lactonization of 2-Alkynylbenzoates for the Assembly of Isochromenones Mediated by BF 3·Et 2O. J Org Chem 2019; 84:10402-10411. [PMID: 31328911 DOI: 10.1021/acs.joc.9b01601] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A general and efficient lactonization method of readily available 2-alkynylbenzoates affording biologically important isochromenones has been realized via a solely BF3·Et2O-mediated 6-endo-dig cyclization process under mild conditions. An alternative mechanistic pathway in which BF3·Et2O activates the carbonyl of the ester moiety, rather than the alkyne triple bond, was postulated on the basis of control experiment results. Gram-scale reaction and further application for the assembly of more complex molecules demonstrated the practicability of the protocol.
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Affiliation(s)
- Xiang Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Xintong Wan
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Ying Cong
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Xiaohua Zhen
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Qiao Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Daisy Zhang-Negrerie
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072 , China
| | - Kang Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
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42
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Wang YH, Qiu G, Zhou H, Xie W, Liu JB. Regioselective cyclization of 2-alkynylbenzoic acid in water for the synthesis of isocoumarin. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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43
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Goulart HA, Neto JSS, Barcellos AM, Barcellos T, Silva MS, Alves D, Jacob RG, Lenardão EJ, Perin G. Synthesis of 5
H
‐Selenopheno[3,2‐
c
]isochromen‐5‐ones Promoted by Dialkyl Diselenides and Oxone®. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900288] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Helen A. Goulart
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - José S. S. Neto
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - Angelita M. Barcellos
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic ProductsUniversidade de Caxias do Sul, Caxias do Sul, RS Brazil
| | - Márcio S. Silva
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - Diego Alves
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - Raquel G. Jacob
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - Eder J. Lenardão
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
| | - Gelson Perin
- LASOL-CCQFA-Universidade Federal de Pelotas-UFPel P.O. Box 354-96010-900 Pelotas, RS Brazil
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44
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Ii Y, Hirabayashi S, Yoshioka S, Aoyama H, Murai K, Fujioka H, Arisawa M. Pd-Catalyzed Migratory Cycloisomerization of N-Allyl-o-allenylaniline Derivatives. Org Lett 2019; 21:3501-3504. [DOI: 10.1021/acs.orglett.9b00676] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yasuhiro Ii
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Satoru Hirabayashi
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Shohei Yoshioka
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Hiroshi Aoyama
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Kenichi Murai
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Hiromichi Fujioka
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
| | - Mitsuhiro Arisawa
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamada-oka 1-6, Suita, Osaka 565-0871, Japan
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45
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Curti F, Tiecco M, Pirovano V, Germani R, Caselli A, Rossi E, Abbiati G. p
-TSA-Based DESs as “Active Green Solvents” for Microwave Enhanced Cyclization of 2-Alkynyl-(hetero)-arylcarboxylates: an Alternative Access to 6-Substituted 3,4-Fused 2-Pyranones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801884] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fabiola Curti
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “Alessandro Marchesini”; Università degli Studi di Milano; Via Venezian 21 - 20133 Milano - Italy
| | - Matteo Tiecco
- Dipartimento di Farmacia Università di Chieti-Pescara “G. D'Annunzio”; Via dei Vestini 31 - 66100 Chieti - Italy
| | - Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “Alessandro Marchesini”; Università degli Studi di Milano; Via Venezian 21 - 20133 Milano - Italy
| | - Raimondo Germani
- Dipartimento di Chimica; Università di Perugia; Biologia e Biotecnologie 06123 Perugia - Italy
| | - Alessandro Caselli
- Dipartimento di Chimica; Università degli Studi di Milano; Via Golgi 19 - 20133 Milano - Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “Alessandro Marchesini”; Università degli Studi di Milano; Via Venezian 21 - 20133 Milano - Italy
| | - Giorgio Abbiati
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “Alessandro Marchesini”; Università degli Studi di Milano; Via Venezian 21 - 20133 Milano - Italy
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46
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Tu KN, Kim S, Blum SA. Copper-Catalyzed Aminoboration from Hydrazones To Generate Borylated Pyrazoles. Org Lett 2019; 21:1283-1286. [DOI: 10.1021/acs.orglett.8b04038] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kim N. Tu
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Scott Kim
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Suzanne A. Blum
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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47
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Sihag P, Jeganmohan M. Regioselective Synthesis of Isocoumarins via Iridium(III)-Catalyzed Oxidative Cyclization of Aromatic Acids with Propargyl Alcohols. J Org Chem 2019; 84:2699-2712. [DOI: 10.1021/acs.joc.8b03077] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Pinki Sihag
- 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
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48
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Liu W, Zeng R, Han Y, Wang Y, Tao H, Chen Y, Liu F, Liang Y. Computational and experimental investigation on the BCl3 promoted intramolecular amination of alkenes and alkynes. Org Biomol Chem 2019; 17:2776-2783. [DOI: 10.1039/c9ob00264b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The BCl3 promoted aminoboration of alkenes and alkynes was investigated both computationally and experimentally, leading to the discovery of a metal-free hydroamination of alkynes.
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Affiliation(s)
- Wei Liu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Ruxin Zeng
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yingbin Han
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yajun Wang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Huimin Tao
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Fang Liu
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
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49
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Wang D, Xue X, Houk KN, Shi Z. Mild Ring‐Opening 1,3‐Hydroborations of Non‐Activated Cyclopropanes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811036] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Di Wang
- State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Xiao‐Song Xue
- Department of Chemistry and BiochemistryUniversity of California Los Angeles CA 90095 USA
- State Key Laboratory of Elemento-organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Kendall N. Houk
- Department of Chemistry and BiochemistryUniversity of California Los Angeles CA 90095 USA
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
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50
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Wang D, Xue X, Houk KN, Shi Z. Mild Ring‐Opening 1,3‐Hydroborations of Non‐Activated Cyclopropanes. Angew Chem Int Ed Engl 2018; 57:16861-16865. [DOI: 10.1002/anie.201811036] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Di Wang
- State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Xiao‐Song Xue
- Department of Chemistry and BiochemistryUniversity of California Los Angeles CA 90095 USA
- State Key Laboratory of Elemento-organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Kendall N. Houk
- Department of Chemistry and BiochemistryUniversity of California Los Angeles CA 90095 USA
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
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