1
|
Barik P, Behera SS, Nayak LK, Nanda LN, Nanda SK, Patri P. Transition metal catalysed cascade C-C and C-O bond forming events of alkynes. Org Biomol Chem 2024; 22:5052-5086. [PMID: 38856756 DOI: 10.1039/d3ob02044d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
The past few decades have witnessed the emergence of domino reactions as a powerful tool for the multi-functionalization of alkynes for the rapid and smooth construction of complex molecular architectures. In this context, employing transition metal catalysis, vicinal/geminal cascade functionalization of alkynes involving C-C and C-O bond-formation reactions, has become a preferred strategy for the synthesis of oxygenated motifs. Despite this significant progress, reviews documenting such strategies are either metal/functional group-centric or target-oriented, thus hampering further developments. Therefore, in this review, different conceptual approaches based on C-C and C-O bond-forming events of alkynes such as carboxygenation (C-C and CO bond formation), carboalkoxylation (C-C and C-OR bond formation), and carboacetoxylation (C-C and C-OAc bond formations) are discussed, and examples from the literature from the last two decades are presented. Further, we have presented detailed insights into the mechanism of different transformations.
Collapse
Affiliation(s)
- Padmanava Barik
- PG Department of Chemistry, Bhadrak Autonomous College, Bhadrak, Odisha, 756100, India.
| | | | - Laxmi Kanta Nayak
- PG Department of Chemistry, Bhadrak Autonomous College, Bhadrak, Odisha, 756100, India.
| | | | - Santosh Kumar Nanda
- PG Department of Chemistry, Bhadrak Autonomous College, Bhadrak, Odisha, 756100, India.
| | - Padmanava Patri
- PG Department of Chemistry, Bhadrak Autonomous College, Bhadrak, Odisha, 756100, India.
| |
Collapse
|
2
|
Wang Z, Cao T, Zhu S. Gold-Catalyzed Enynal and Enynol Coupling by Selectively Steering Two Transient Vinyl-Gold Intermediates. Org Lett 2022; 24:9296-9300. [PMID: 36484517 DOI: 10.1021/acs.orglett.2c03890] [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
The vinyl-gold bond is easily accessible but less exploited in homogeneous gold catalysis, which possesses weak nucleophilicity and would be likely to undergo protodemetalation. Herein, a gold-catalyzed enynal and enynol coupling by selectively steering two transient vinyl-gold intermediates is realized under mild conditions. It exhibits high atom economy and good tolerance of functional groups with the added benefit of operational simplicity. The control experiments indicated that the in situ formed vinyl-gold accounts for the reactivity.
Collapse
Affiliation(s)
- Zipeng Wang
- 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
| | - Tongxiang Cao
- 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
| | - Shifa Zhu
- 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
|
3
|
Yang L, Su H, Sun Y, Zhang S, Cheng M, Liu Y. Recent Advances in Gold(I)-Catalyzed Approaches to Three-Type Small-Molecule Scaffolds via Arylalkyne Activation. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248956. [PMID: 36558089 PMCID: PMC9785939 DOI: 10.3390/molecules27248956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Gold catalysts possess the advantages of water and oxygen resistance, with the possibility of catalyzing many novel chemical transformations, especially in the syntheses of small-molecule skeletons, in addition to achieving the rapid construction of multiple chemical bonds and ring systems in one step. In this feature paper, we summarize recent advances in the construction of small-molecule scaffolds, such as benzene, cyclopentene, furan, and pyran, based on gold-catalyzed cyclization of arylalkyne derivatives within the last decade. We hope that this review will serve as a useful reference for chemists to apply gold-catalyzed strategies to the syntheses of related natural products and active molecules, hopefully providing useful guidance for the exploration of additional novel gold-catalyzed approaches.
Collapse
Affiliation(s)
- Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Institute of Drug Research in Medicine Capital of China, Shenyang Pharmaceutical University, Benxi 117000, China
| | - Hongwei Su
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
- Institute of Drug Research in Medicine Capital of China, Shenyang Pharmaceutical University, Benxi 117000, China
| | - Yue Sun
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Institute of Drug Research in Medicine Capital of China, Shenyang Pharmaceutical University, Benxi 117000, China
| | - Sen Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Institute of Drug Research in Medicine Capital of China, Shenyang Pharmaceutical University, Benxi 117000, China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
- Institute of Drug Research in Medicine Capital of China, Shenyang Pharmaceutical University, Benxi 117000, China
- Correspondence: (M.C.); (Y.L.)
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Institute of Drug Research in Medicine Capital of China, Shenyang Pharmaceutical University, Benxi 117000, China
- Correspondence: (M.C.); (Y.L.)
| |
Collapse
|
4
|
Lin X, Liu X, Wang K, Li Q, Liu Y, Li C. Biomimetic approach to the catalytic enantioselective synthesis of tetracyclic isochroman. Nat Commun 2021; 12:4958. [PMID: 34400633 PMCID: PMC8368254 DOI: 10.1038/s41467-021-25198-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 07/22/2021] [Indexed: 11/25/2022] Open
Abstract
Polyketide oligomers containing the structure of tetracyclic isochroman comprise a large class of natural products with diverse activity. However, a general and stereoselective method towards the rapid construction of this structure remains challenging due to the inherent instability and complex stereochemistry of polyketide. By mimicking the biosynthetic pathway of this structurally diverse set of natural products, we herein develop an asymmetric hetero-Diels–Alder reaction of in-situ generated isochromene and ortho-quinonemethide. A broad range of tetracyclic isochroman frameworks are prepared in good yields and excellent stereoinduction (up to 95% ee) from readily available α-propargyl benzyl alcohols and 2-(hydroxylmethyl) phenols under mild conditions. This direct enantioselective cascade reaction is achieved by a Au(I)/chiral Sc(III) bimetallic catalytic system. Experimental studies indicate that the key hetero-Diels-Alder reaction involves a stepwise pathway, and the steric hindrance between in-situ generated isochromene and t-Bu group of Sc(III)/N,N’-dioxide complex is responsible for the enantioselectivity in the hetero-Diels–Alder reaction step. General and stereoselective synthesis of tetracyclic isochroman-containing polyketide oligomers is challenging. Here, the authors report on an Au(I)/chiral Sc(III) bimetallic catalyst for a biomimetic asymmetric hetero-Diels–Alder reaction for in-situ generation of isochromene and ortho-quinonemethide.
Collapse
Affiliation(s)
- Xiangfeng Lin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xianghui Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Kai Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qian Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yan Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
| |
Collapse
|
5
|
Praveen C. Cycloisomerization of π-Coupled Heteroatom Nucleophiles by Gold Catalysis: En Route to Regiochemically Defined Heterocycles. CHEM REC 2021; 21:1697-1737. [PMID: 34061426 DOI: 10.1002/tcr.202100105] [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: 03/31/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 11/06/2022]
Abstract
Since the dawn of millennium, catalytic gold chemistry is at the forefront to set off diverse organic reactions via unique activation of π-bonded molecules. Within this purview, cycloisomerization of heteroatom nucleophiles linked to a π-system is one of the well recognized chemistry for the construction of numerous heterocyclic cores. Though the rudimentary aspects of this transformation are reviewed by several groups in different timeline, a holistic view on regiochemistry of such reactions went largely overlooked. Hence, this account emphasizes the gold catalyzed regioselective cycloisomerization of structurally distinctive π-connected hetero-nucleophiles leading to different heterocycles documented in the last two decades. From an application perspective, this account also highlights those methodologies which find a role in the total synthesis of natural products. Wherever appropriate, mechanistic details and contributing factors for selectivity are also discussed.
Collapse
Affiliation(s)
- Chandrasekar Praveen
- Electrochemical Power Sources Division, Central Electrochemical Research Institute (CSIR Laboratory), Alagappapuram, Karaikudi, 630003, Sivagangai District, Tamil Nadu, India
| |
Collapse
|
6
|
Milcendeau P, Gandon V, Guinchard X. Gold‐Catalyzed Carboamination of Allenes by Tertiary Amines Proceeding with Benzylic Group Migration. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pierre Milcendeau
- Université Paris-Saclay, CNRS Institut de Chimie des Substances Naturelles, UPR 2301 91198 Gif-sur-Yvette France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182 Université Paris-Saclay Bâtiment 420 91405 Orsay cedex France
- Laboratoire de Chimie Moléculaire (LCM) CNRS UMR 9168 Ecole Polytechnique Institut Polytechnique de Paris route de Saclay 91128 Palaiseau cedex France
| | - Xavier Guinchard
- Université Paris-Saclay, CNRS Institut de Chimie des Substances Naturelles, UPR 2301 91198 Gif-sur-Yvette France
| |
Collapse
|
7
|
Le Q, Dillon CC, Lichtenstein DA, Pisor JW, Closser KD, Muchalski H. Gold(I)-NHC-catalysed synthesis of benzofurans via migratory cyclization of 2-alkynylaryl ethers. Org Biomol Chem 2020; 18:8186-8191. [PMID: 33026395 DOI: 10.1039/d0ob01538e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Homogeneous cationic gold(i) catalysis emerged as a preferred avenue for the activation of alkenes and alkynes towards reactions with weak nucleophiles, especially in cyclization reactions. Here we report an intramolecular carboalkoxylation reaction of electron-rich benzyl ethers of 2-ethynylaryl phenols catalysed by a digold(i)-NHC complex. The reaction proceeds efficiently with low catalyst loading and the resulting 2,3-disubstituted benzofurans form in moderate to good yields. Based on the results of a cross-over experiment, spectroscopic data, and DFT calculations, we propose a mechanism that accounts for the observed chemo- and regioselectivity.
Collapse
Affiliation(s)
- Quang Le
- California State University Fresno, 2555 E San Ramon Ave M/S SB70, Fresno, CA 93740, USA.
| | - Christopher C Dillon
- California State University Fresno, 2555 E San Ramon Ave M/S SB70, Fresno, CA 93740, USA.
| | - Dana A Lichtenstein
- California State University Fresno, 2555 E San Ramon Ave M/S SB70, Fresno, CA 93740, USA.
| | - Jeremy W Pisor
- California State University Fresno, 2555 E San Ramon Ave M/S SB70, Fresno, CA 93740, USA.
| | - Kristina D Closser
- California State University Fresno, 2555 E San Ramon Ave M/S SB70, Fresno, CA 93740, USA.
| | - Hubert Muchalski
- California State University Fresno, 2555 E San Ramon Ave M/S SB70, Fresno, CA 93740, USA.
| |
Collapse
|
8
|
Mangaonkar SR, Shetgaonkar SE, Vernekar AA, Singh FV. Ultrasonic‐Assisted Hypervalent Iodine‐Catalyzed Cyclization of (
E
)‐2‐Hydroxystilbenes to Benzofurans Using Iodobenzene as Pre‐catalyst. ChemistrySelect 2020. [DOI: 10.1002/slct.202002860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Saeesh R. Mangaonkar
- Chemistry Division School of Advanced Sciences (SAS), VIT Chennai Vandalur-Kelambakkam Road Chennai 600 127, Tamil Nadu India
| | - Samata E. Shetgaonkar
- Chemistry Division School of Advanced Sciences (SAS), VIT Chennai Vandalur-Kelambakkam Road Chennai 600 127, Tamil Nadu India
| | - Amit A. Vernekar
- Inorganic and Physical Chemistry Laboratory CSIR-Central Leather Research Institute (CLRI) Adyar Chennai 600 020, Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi India
| | - Fateh V. Singh
- Chemistry Division School of Advanced Sciences (SAS), VIT Chennai Vandalur-Kelambakkam Road Chennai 600 127, Tamil Nadu India
| |
Collapse
|
9
|
Abstract
:
The benzofuranyl motif present in compounds exhibits various medicinal properties and
non-drug applications. These derivatives are naturally occurring compounds or synthetic materials,
which cover a broad spectrum of pharmacological activities like anti-inflammatory, anti-diabetic, anti-
depressant, anti-HIV, anti-microbial, anti-proliferative, anti-convulsant, cytotoxic, analgesic, etc.
Few of the commercially interesting compounds from this class are, ailanthoidol (anti-inflammatory),
amiodarone, dronedarone, celivarone (anti-arrhythmic), bufuralol (muscular airways relaxant), morphine,
5-(2-aminopropyl)benzofuran; 5-APB, 6-(2-aminopropyl)benzofuran; 6-APB (CNS), rifampicin
(antibiotic), etc., whereas, some of the non-drug applications are in perfumery industry (bergapten)
and as tannin activators in sunscreen preparations (psoralen, 8-methoxypsoralen, and angelicin).
Considering these interesting biological activities and commercial utilities, a review on the synthetic
aspects of this privileged scaffold was attempted. For the benefit of natural product-based drug discovery,
available sources of these derivatives, extraction process and reported biological activities
have also been outlined in this review.
Collapse
Affiliation(s)
- Andiappan Lavanya
- Department of Training and Development, Orchid Pharma Ltd., 138-149, SIDCO Industrial Estate, Alathur, Chennai- 603 110, Tamil Nadu, India
| | - Kilambi Narasimhan
- Department of Training and Development, Orchid Pharma Ltd., 138-149, SIDCO Industrial Estate, Alathur, Chennai- 603 110, Tamil Nadu, India
| | - Vediappen Padmini
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| |
Collapse
|
10
|
Ma Z, Zhou M, Ma L, Zhang M. Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820907244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cyclodehydration of α-phenoxy ketones promoted by Eaton’s reagent (phosphorus pentoxide–methanesulfonic acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare naphthofurans, furanocoumarins, benzothiophenes, and benzopyrans.
Collapse
Affiliation(s)
- Zhanwei Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| | - Min Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| | - Lin Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| | - Min Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| |
Collapse
|
11
|
Tyagi A, Reshi NUD, Daw P, Bera JK. Palladium complexes with an annellated mesoionic carbene (MIC) ligand: catalytic sequential Sonogashira coupling/cyclization reaction for one-pot synthesis of benzofuran, indole, isocoumarin and isoquinolone derivatives. Dalton Trans 2020; 49:15238-15248. [DOI: 10.1039/d0dt02918a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pd(ii) complex containing a mesoionic carbene and phosphine ligands is an efficient catalyst for tandem coupling/cyclization reaction.
Collapse
Affiliation(s)
- Akshi Tyagi
- Department of Chemistry and Centre for Environmental Sciences and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Noor U Din Reshi
- Department of Chemistry and Centre for Environmental Sciences and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Prosenjit Daw
- Department of Chemistry and Centre for Environmental Sciences and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Jitendra K. Bera
- Department of Chemistry and Centre for Environmental Sciences and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| |
Collapse
|
12
|
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
| |
Collapse
|
13
|
Chong KW, Thomas NF, Low YY, Kam TS. Reactivity of Anodically Generated 4-Methoxystilbene Cation Radicals: The Influence of Ortho-Substituted Hydroxymethyl, Aminomethyl, and Carboxylic Acid Groups. J Org Chem 2018; 83:15087-15100. [DOI: 10.1021/acs.joc.8b02360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kam-Weng Chong
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Noel F. Thomas
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| |
Collapse
|
14
|
Saraiah B, Gautam V, Acharya A, Pasha MA, Ila H. One-Pot Synthesis of 2-(Het)aryl/alkyl-3-cyanobenzofurans from 2-(2-Bromoaryl)-3-(het)aryl-3-(methylthio)acrylonitriles and Benzyl Carbamate. ACS OMEGA 2018; 3:8355-8364. [PMID: 31458967 PMCID: PMC6644376 DOI: 10.1021/acsomega.8b01172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 07/13/2018] [Indexed: 06/10/2023]
Abstract
A one-pot synthesis of 2-(het)aryl/alkyl-3-cyanobenzofurans has been reported. The overall sequence involves base-induced reaction of 2-(2-bromoaryl)-3-(het)aryl-3-(methylthio)acrylonitriles with benzyl carbamate, generating α-(het)aroyl-α-(2-bromoaryl)acetonitriles, which are in situ subjected to copper-catalyzed intramolecular O-arylation, furnishing the 2-(het)aryl/alkyl-3-cyanobenzofurans in high yields. A probable mechanism for the base-induced cleavage of 2-(2-bromoaryl)-3-(het)aryl-3-(methylthio)acrylonitriles to α-(het)aroyl-α-(2-bromoaryl)acetonitriles in the presence of benzyl carbamate has been proposed.
Collapse
Affiliation(s)
- Bonagiri Saraiah
- Department
of Studies in Chemistry, Central College campus, Bangalore University, Palace Road, Bangalore 560001, India
| | - Vibha Gautam
- New
Chemistry Unit, Jawaharlal Nehru Centre
for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Anand Acharya
- New
Chemistry Unit, Jawaharlal Nehru Centre
for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Mohamed Afzal Pasha
- Department
of Studies in Chemistry, Central College campus, Bangalore University, Palace Road, Bangalore 560001, India
| | - Hiriyakkanavar Ila
- New
Chemistry Unit, Jawaharlal Nehru Centre
for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| |
Collapse
|
15
|
Alonso-Marañón L, Martínez MM, Sarandeses LA, Gómez-Bengoa E, Pérez Sestelo J. Indium(III)-Catalyzed Synthesis of Benzo[ b]furans by Intramolecular Hydroalkoxylation of ortho-Alkynylphenols: Scope and Mechanistic Insights. J Org Chem 2018; 83:7970-7980. [PMID: 29890829 DOI: 10.1021/acs.joc.8b00829] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Indium(III) halides catalyze the hydroalkoxylation reaction of ortho-alkynylphenols to afford benzo[ b]furans in good yields. The reaction proceeds with 5- endo- dig regioselectivity with a variety of phenols functionalized at the arene and alkyne moieties in high yields using InI3 (5 mol %) in DCE. Experimental and computational studies support a mechanism based on the indium(III) π-Lewis acid activation of the alkyne followed by nucleophilic addition of the phenol and final protodemetalation to afford the corresponding benzo[ b]furan. DFT calculations suggest that dimer In2I6 is the catalytic species through a novel double coordination with the alkyne and the hydroxyl group.
Collapse
Affiliation(s)
- Lorena Alonso-Marañón
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química , Universidade da Coruña , E-15071 A Coruña , Spain
| | - M Montserrat Martínez
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química , Universidade da Coruña , E-15071 A Coruña , Spain
| | - Luis A Sarandeses
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química , Universidade da Coruña , E-15071 A Coruña , Spain
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I , Universidad del País Vasco UPV/EHU , 20009 Donostia-San Sebastián , Spain
| | - José Pérez Sestelo
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química , Universidade da Coruña , E-15071 A Coruña , Spain
| |
Collapse
|
16
|
Li Y, Gryn'ova G, Saenz F, Jeanbourquin X, Sivula K, Corminboeuf C, Waser J. Heterotetracenes: Flexible Synthesis and in Silico Assessment of the Hole-Transport Properties. Chemistry 2017; 23:8058-8065. [DOI: 10.1002/chem.201701139] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Yifan Li
- Laboratory of Catalysis and Organic Synthesis; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Ganna Gryn'ova
- Laboratory for Computational Molecular Design; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Felipe Saenz
- Laboratory of Catalysis and Organic Synthesis; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Xavier Jeanbourquin
- Laboratory of Molecular Engineering of Optoelectronic Nanomaterials; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Kevin Sivula
- Laboratory of Molecular Engineering of Optoelectronic Nanomaterials; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Clémence Corminboeuf
- Laboratory for Computational Molecular Design; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Jérôme Waser
- Laboratory of Catalysis and Organic Synthesis; Institut des Sciences et Ingénierie Chimiques; École polytechnique fédérale de Lausanne; 1015 Lausanne Switzerland
| |
Collapse
|
17
|
Watanabe K, Mino T, Ishikawa E, Okano M, Ikematsu T, Yoshida Y, Sakamoto M, Sato K, Yoshida K. Synthesis of
o
‐Allyloxy(ethynyl)benzene Derivatives by Cu‐Catalyzed Suzuki–Miyaura‐Type Reaction and Their Transformations into Heterocyclic Compounds. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700217] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kohei Watanabe
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Molecular Chirality Research Center Chiba University 1‐33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Eri Ishikawa
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Miyu Okano
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Tatsuya Ikematsu
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Molecular Chirality Research Center Chiba University 1‐33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University 1–33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Molecular Chirality Research Center Chiba University 1‐33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Kazuki Sato
- Department of Chemistry Graduate School of Science Chiba University 1‐33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Kazuhiro Yoshida
- Molecular Chirality Research Center Chiba University 1‐33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Department of Chemistry Graduate School of Science Chiba University 1‐33, Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| |
Collapse
|
18
|
Rehan M, Nallagonda R, Das BG, Meena T, Ghorai P. Synthesis of Functionalized Benzo[b]furans via Oxidative Cyclization of o-Cinnamyl Phenols. J Org Chem 2017; 82:3411-3424. [PMID: 28249386 DOI: 10.1021/acs.joc.6b02752] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Disclosed herein is an efficient synthetic route for the synthesis of functionalized 2-benzyl benzo[b]furans via a regioselective 5-exo-trig intramolecular oxidative cyclization of ortho-cinnamyl phenols using [PdCl2(CH3CN)2] as catalyst and benzoquinone as an oxidant. Further, a sequential ortho-cinnamylation of phenols using cinnamyl alcohols catalyzed by Re2O7, followed by an oxidative cyclization using the above Pd catalyst, is performed. The reaction showed broad substrate scope with good to excellent yields.
Collapse
Affiliation(s)
- Mohammad Rehan
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Rajender Nallagonda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Braja Gopal Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Tannu Meena
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| |
Collapse
|
19
|
Hinkle RJ, Chen Y, Nofi CP, Lewis SE. Electronic effects on a one-pot aromatization cascade involving alkynyl-Prins cyclization, Friedel–Crafts alkylation and dehydration to tricyclic benzo[f]isochromenes. Org Biomol Chem 2017; 15:7584-7593. [DOI: 10.1039/c7ob01412k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A short, efficient cyclization/aromatization cascade affords tricyclic 1,4-dihydro-2H-benzo[f]isochromenes. Electronic factors suggest concerted alkynyl-Prins and Friedel–Crafts reactions in the sequence.
Collapse
Affiliation(s)
- Robert J. Hinkle
- Department of Chemistry
- The College of William & Mary
- Williamsburg
- USA
| | - Yuzhou Chen
- Department of Chemistry
- The College of William & Mary
- Williamsburg
- USA
| | - Colleen P. Nofi
- Department of Chemistry
- The College of William & Mary
- Williamsburg
- USA
| | - Shane E. Lewis
- Department of Chemistry
- The College of William & Mary
- Williamsburg
- USA
| |
Collapse
|