1
|
Boquet V, Sauber C, Beltran R, Ferey V, Rodier F, Hansjacob P, Theunissen C, Evano G. Copper-Catalyzed Coupling between ortho-Haloanilines and Lactams/Amides: Synthesis of Benzimidazoles and Telmisartan. J Org Chem 2024; 89:5469-5479. [PMID: 38565075 DOI: 10.1021/acs.joc.3c02905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
An efficient copper-catalyzed synthesis of (annelated) benzimidazoles is reported. This transformation is based on a simple and straightforward one-pot sequence involving a copper-catalyzed cross coupling between o-haloanilines and lactams/amides followed by a subsequent cyclization under acidic conditions. A variety of (annelated) benzimidazoles could be easily obtained in high yields from readily available starting materials, and this procedure could be further applied to the synthesis of the antihypertensive blockbuster drug telmisartan.
Collapse
Affiliation(s)
- Vincent Boquet
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
| | - Chris Sauber
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
| | | | | | - Fabien Rodier
- Sanofi, 45 Chemin de Météline, 04200 Sisteron, France
| | - Pierre Hansjacob
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
| | - Cédric Theunissen
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Brussels, Belgium
- WEL Research Institute, Avenue Pasteur 6, 1300 Wavre, Belgium
| |
Collapse
|
2
|
Mensah A, Liu XY, Hu BX, Kweku EV, Wang FM, Chen LZ, Zheng SJ. One Pot Synthesis of New Benzimidazole Derivatives with Exceptionally High Luminescence Quantum Efficiency. Curr Org Synth 2024; 21:1091-1101. [PMID: 39044697 DOI: 10.2174/0115701794271985231219070212] [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: 07/20/2023] [Revised: 10/16/2023] [Accepted: 10/26/2023] [Indexed: 07/25/2024]
Abstract
AIM AND OBJECTIVES There are different approaches to the synthesis of benzimidazole. In this article, five new benzimidazole derivatives, BMPO, Me-BMPO, Di-MeBMPO, F-BMPO and Cl-BMPO where (BMPO=3-[(1H)-benzo[d]imidazol-2-yl]pyridin-2(1H)-one), have been prepared. Another study was carried out on luminescence properties and their potential applications for the detection of transition metal ions. MATERIALS AND METHODS From the one-pot synthesis approach, all the derivatives of the benzimidazole compounds were obtained. The compounds were characterized using HRMS, 1HNMR, 13CNMR, and X-ray crystallography. Herein, a mechanism has been deciphered by predicting the release of HCl(g). RESULTS All compounds showed a strong deep blue emission when dissolved in dimethylacetamide (DMA), with emission wavelengths at 423, 428, 435, 423, and 421 nm, and half-times of 3.64, 2.77, 2, 19, 3.42 and 3.52 ns, respectively. In addition, their emission quantum yields were determined to be 72, 50, 42, 73 and 80%. CONCLUSION Five new benzimidazole derivatives, BMPO, Me-BMPO, Di-MeBIPO, F-BIPO, and Cl-BIPO, have been successfully synthesized by the one-pot synthesis method, and their structures are characterized and confirmed. The compounds exhibited exceptional luminescence by emitting a strong blue light in DMA with high fluorescence quantum yields between 42~80%.
Collapse
Affiliation(s)
- Abraham Mensah
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Xin-Ye Liu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Bing-Xiang Hu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Ennin Vendish Kweku
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Fang-Ming Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Li-Zhuang Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Shao-Jun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| |
Collapse
|
3
|
Zhong B, Chen F, Ge Y, Liu D. Developing a fast and catalyst-free protocol to form C=N double bond with high functional group tolerance. ROYAL SOCIETY OPEN SCIENCE 2023; 10:231263. [PMID: 37800155 PMCID: PMC10548102 DOI: 10.1098/rsos.231263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/12/2023] [Indexed: 10/07/2023]
Abstract
The carbon-nitrogen double bond (C=N) is a fundamentally important functional group in organic chemistry. This is largely due to the fact that C=N acts as electrophilic synthon to give nitrogen-containing compounds. Here, we report the condensation of primary amine or hydrazine with very electron-deficient aldehyde to form C=N bond in the absence of any catalysts (metals and acids). The protocol performs at room temperature and applies water as co-solvent. Two hundred examples are presented here. With its intrinsic advantages of wide substrate scopes, excellent efficiency (high yields and short reaction time), operational simplicity, mild condition (room temperature as reaction temperature, no catalysts, no additions, water as co-solvent and opening to air) and available starting materials, the protocol can be compatible with various drugs, prodrugs, dyes and pharmacophores containing primary amino group. In addition, we also successfully apply this protocol to rapidly synthesize the core scaffolds of bioactive molecules.
Collapse
Affiliation(s)
- Bin Zhong
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Feng Chen
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Yushu Ge
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Dan Liu
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
- The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
| |
Collapse
|
4
|
Aboonajmi J, Mohammadi M, Panahi F, Aberi M, Sharghi H. One-pot, three-component, iron-catalyzed synthesis of benzimidazoles via domino C-N bond formation. RSC Adv 2023; 13:24789-24794. [PMID: 37608969 PMCID: PMC10440634 DOI: 10.1039/d3ra04450e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/14/2023] [Indexed: 08/24/2023] Open
Abstract
An efficient one-pot, three-component process for the synthesis of benzimidazole derivatives using a catalytic amount of Fe(iii) porphyrin has been developed. The reaction proceeds via domino C-N bond formation and cyclization reactions of benzo-1,2-quinone, aldehydes and ammonium acetate as a nitrogen source to selectively produce benzimidazole. A number of benzimidazole derivatives have been synthesized using this method in high yields under mild reaction conditions.
Collapse
Affiliation(s)
- Jasem Aboonajmi
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran +98 7132280926 +98 7136137136
| | - Masoumeh Mohammadi
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran +98 7132280926 +98 7136137136
| | - Farhad Panahi
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran +98 7132280926 +98 7136137136
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg im Breisgau Germany
| | - Mahdi Aberi
- Department of Chemical and Materials Engineering, Faculty of Shahid Rajaee, Technical and Vocational University (TVU) Shiraz Branch Shiraz Iran
| | - Hashem Sharghi
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran +98 7132280926 +98 7136137136
| |
Collapse
|
5
|
Patel M, Avashthi G, Gacem A, Alqahtani MS, Park HK, Jeon BH. A Review of Approaches to the Metallic and Non-Metallic Synthesis of Benzimidazole (BnZ) and Their Derivatives for Biological Efficacy. Molecules 2023; 28:5490. [PMID: 37513362 PMCID: PMC10384041 DOI: 10.3390/molecules28145490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/08/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Heterocyclic compounds are significant lead drug candidates based on their various structure-activity relationships (SAR), and their use in pharmaceutics is constantly developing. Benzimidazole (BnZ) is synthesized by a condensation reaction between benzene and imidazole. The BnZ structure consists of two nitrogen atoms embedded in a five-membered imide ring which is fused with a benzene ring. This review examines the conventional and green synthesis of metallic and non-metallic BnZ and their derivatives, which have several potential SARs, along with a wide range of pharmacological properties, including anti-cancer, anti-inflammatory, anti-microbial, anti-tubercular, and anti-protozoal properties. These compounds have been proven by pharmacological investigations to be efficient against different strains of microbes. Therefore, in this review, the structural variations of BnZ are listed along with various applications, predominantly related to their biological activities.
Collapse
Affiliation(s)
- Muhammad Patel
- School of Sciences, P P Savani University, NH 8, GETCO, Near Biltech, Dhamdod, Kosamba, Surat 394125, Gujarat, India
| | - Gopal Avashthi
- School of Sciences, P P Savani University, NH 8, GETCO, Near Biltech, Dhamdod, Kosamba, Surat 394125, Gujarat, India
| | - Amel Gacem
- Department of Physics, Faculty of Sciences, University 20 Août 1955 Skikda, Skikda 21000, Algeria;
| | - Mohammed S. Alqahtani
- Radiological Sciences Department, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia;
- Bioimaging Unit, Space Research Centre, Michael Atiyah Building, University of Leicester, Leicester LE1 7RH, UK
| | - Hyun-Kyung Park
- Department of Pediatrics, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| |
Collapse
|
6
|
Gaware S, Chatterjee R, Dhayalan V, Dandela R. Metal-free One-pot Synthesis of 2-Substituted Benzimidazoles from N-Aryl Imines and TMSN3. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
7
|
Nandi S, Jamatia R, Sarkar R, Sarkar FK, Alam S, Pal AK. One‐Pot Multicomponent Reaction: A Highly Versatile Strategy for the Construction of Valuable Nitrogen‐Containing Heterocycles. ChemistrySelect 2022. [DOI: 10.1002/slct.202201901] [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)
- Sibaji Nandi
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Ramen Jamatia
- Department of Chemistry Rajiv Gandhi University, Rono Hills, Doimukh Arunachal Pradesh 791112 India
| | - Rajib Sarkar
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Fillip Kumar Sarkar
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Safiul Alam
- Department of Chemistry Aliah University, IIA/27, New Town Kolkata 700160 India
| | - Amarta Kumar Pal
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| |
Collapse
|
8
|
Rawat M, Taniike T, Rawat DS. Magnetically Separable Fe
3
O
4
@poly(
m‐
phenylenediamine)@Cu
2
O Nanocatalyst for the Facile Synthesis of 5‐phenyl‐[1,2,3]triazolo[1,5‐c]quinazolines. ChemCatChem 2022. [DOI: 10.1002/cctc.202101926] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Manish Rawat
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Toshiaki Taniike
- Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan
| | - Diwan S. Rawat
- Department of Chemistry University of Delhi Delhi 110007 India
| |
Collapse
|
9
|
Chakraborty G, Mondal R, Guin AK, Paul ND. Nickel catalyzed sustainable synthesis of benzazoles and purines via acceptorless dehydrogenative coupling and borrowing hydrogen approach. Org Biomol Chem 2021; 19:7217-7233. [PMID: 34612344 DOI: 10.1039/d1ob01154e] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Herein we report nickel-catalyzed sustainable synthesis of a few chosen five-membered fused nitrogen heterocycles such as benzimidazole, purine, benzothiazole, and benzoxazole via acceptorless dehydrogenative functionalization of alcohols. Using a bench stable, easy to prepare, and inexpensive Ni(ii)-catalyst, [Ni(MeTAA)] (1a), featuring a tetraaza macrocyclic ligand (tetramethyltetraaza[14]annulene (MeTAA)), a wide variety of polysubstituted benzimidazole, purine, benzothiazole, and benzoxazole derivatives were prepared via dehydrogenative coupling of alcohols with 1,2-diaminobenzene, 4,5-diaminopyrimidine, 2-aminothiphenol, and 2-aminophenol, respectively. A wide array of benzimidazoles were also prepared via a borrowing hydrogen approach involving alcohols as hydrogen donors and 2-nitroanilines as hydrogen acceptors. A few control experiments were performed to understand the reaction mechanism.
Collapse
Affiliation(s)
- Gargi Chakraborty
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India.
| | | | | | | |
Collapse
|
10
|
Belkharchach S, Ighachane H, Rochdi A, Ait Ali M, Lazrek HB. One-pot Synthesis of Benzimidazoles Using H 2SO 4@HTC as Catalyst. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2021.1873066] [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]
Affiliation(s)
- Soumia Belkharchach
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech, Morocco
| | - Hana Ighachane
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech, Morocco
| | - Abdelali Rochdi
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech, Morocco
| | - Mustapha Ait Ali
- Laboratory of Coordination Chemistry and Catalysis, Faculty of Science Semlalia, Marrakech, Morocco
| | - Hassan B. Lazrek
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech, Morocco
| |
Collapse
|
11
|
Vandeputte MM, Van Uytfanghe K, Layle NK, St. Germaine DM, Iula DM, Stove CP. Synthesis, Chemical Characterization, and μ-Opioid Receptor Activity Assessment of the Emerging Group of "Nitazene" 2-Benzylbenzimidazole Synthetic Opioids. ACS Chem Neurosci 2021; 12:1241-1251. [PMID: 33759494 DOI: 10.1021/acschemneuro.1c00064] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Several 2-benzylbenzimidazole opioids (also referred to as "nitazenes") recently emerged on the illicit market. The most frequently encountered member, isotonitazene, has been identified in multiple fatalities since its appearance in 2019. Although recent scheduling efforts targeted isotonitazene, many other analogues remain unregulated. Being structurally unrelated to fentanyl, little is known about the harm potential of these compounds. In this study, ten nitazenes and four metabolites were synthesized, analytically characterized via four different techniques, and pharmacologically evaluated using two cell-based β-arrestin2/mini-Gi recruitment assays monitoring μ-opioid receptor (MOR) activation. On the basis of absorption spectra and retention times, high-performance liquid chromatography coupled to diode-array detection (HPLC-DAD) allowed differentiation between most analogues. Time-of-flight mass spectrometry (LC-QTOF-MS) identified a fragment with m/z 100.11 for 12/14 compounds, which could serve as a basis for MS-based nitazene screening. MOR activity determination confirmed that nitazenes are generally highly active, with potencies and efficacies of several analogues exceeding that of fentanyl. Particularly relevant is the unexpected very high potency of the N-desethylisotonitazene metabolite, rivaling the potency of etonitazene and exceeding that of isotonitazene itself. Supported by its identification in fatalities, this likely has in vivo consequences. These results improve our understanding of this emerging group of opioids by laying out an analytical framework for their detection, as well as providing important new insights into their MOR activation potential.
Collapse
Affiliation(s)
- Marthe M. Vandeputte
- Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent 9000, Belgium
| | - Katleen Van Uytfanghe
- Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent 9000, Belgium
| | - Nathan K. Layle
- Forensic Chemistry Division, Cayman Chemical Company, Ann Arbor, Michigan 48108, United States
| | | | - Donna M. Iula
- Forensic Chemistry Division, Cayman Chemical Company, Ann Arbor, Michigan 48108, United States
| | - Christophe P. Stove
- Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent 9000, Belgium
| |
Collapse
|
12
|
Vargas-Oviedo D, Portilla J, Macías MA. Influence of the haloaryl moiety over the molecular packing in N-phenacylbenzimidazoles crystallizing in the same space group. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
13
|
Alzhrani ZMM, Alam MM, Nazreen S. Recent advancements on Benzimidazole: A versatile scaffold in medicinal chemistry. Mini Rev Med Chem 2021; 22:365-386. [PMID: 33797365 DOI: 10.2174/1389557521666210331163810] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/30/2020] [Accepted: 02/25/2021] [Indexed: 11/22/2022]
Abstract
Benzimidazole is nitrogen containing fused heterocycle which has been extensively explored in medicinal chemistry. Benzimidizole nucleus has been found to possess various biological activities such as anticancer, antimicrobial, anti-inflammatory, antiviral, antitubercular and antidiabetic. A number of benzimidazoles such as bendamustine, pantoprazole have been approved for the treatment of various illnesses whereas galeterone and GSK461364 are in clinical trials. The present review article gives an overview about the different biological activities exhibited by the benzimidazole derivatives as well as different methods used for the synthesis of benzimidazole derivatives for the past ten years.
Collapse
Affiliation(s)
| | - Mohammad Mahboob Alam
- Department of Chemistry, Faculty of Science, Albaha University, Albaha. Saudi Arabia
| | - Syed Nazreen
- Department of Chemistry, Faculty of Science, Albaha University, Albaha. Saudi Arabia
| |
Collapse
|
14
|
Mamedov VA, Zhukova NA. Recent Developments Towards Synthesis of (Het)arylbenzimidazoles. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0037-1610767] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AbstractBenzimidazole is an important heterocycle that is widely researched and utilized by the pharmaceutical industry and is one of the five most commonly used five-membered aromatic heterocyclic compounds approved by the US Food and Drug Administration. In view of their wide-ranging bioactivities, systems containing benzimidazole as one of the moieties occupy a special place among other benzimidazole derivatives. Since 2010, many improved synthetic strategies have been developed for the construction of hetaryl- and arylbenzimidazole molecular scaffolds under environmentally benign conditions. This review emphasizes the recent trends and modifications frequently used in the synthesis of derivatives of benzimidazole such as the Phillips–Ladenburg and Weidenhagen reactions, as well as entirely new methods of synthesis, involving oxidative cyclization, cross-coupling, ring distortion strategy, and rearrangements carried out under environmentally benign conditions.1 Introduction2 From 1,2-Diaminobenzenes with Various One-Carbon Unit Suppliers2.1 Phillips–Ladenburg Reaction2.1.1 With (Het)arenecarboxylic Acids2.2.2 With (Het)arenecarboxylic Acid Derivatives2.2 Weidenhagen Reaction2.2.1 With (Het)arenecarbaldehydes or (Het)aryl Methyl Ketones2.2.2 With Primary Alcohols2.2.3 With Primary Alkylamines2.2.4 With 2-Methylazaarenes2.2.5 With Other One-Carbon Fragment Suppliers3 From 2-Haloacetanilides and Amines4 From Amidines5 From Tetrahydroquinazolines6 Mamedov Rearrangement7 Conclusions and Outlook
Collapse
|
15
|
Knippel JL, Ye Y, Buchwald SL. Enantioselective C2-Allylation of Benzimidazoles Using 1,3-Diene Pronucleophiles. Org Lett 2021; 23:2153-2157. [PMID: 33646778 DOI: 10.1021/acs.orglett.1c00306] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although substituted benzimidazoles are common substructures in bioactive small molecules, synthetic methods for their derivatization are still limited. Previously, several enantioselective allylation reactions of benzimidazoles were reported that functionalize the nucleophilic nitrogen atom. Herein we describe a reversal of this inherent selectivity toward N-allylation by using electrophilic N-OPiv benzimidazoles with readily available 1,3-dienes as nucleophile precursors. This CuH-catalyzed approach utilizes mild reaction conditions, exhibits broad functional-group compatibility, and exclusively forms the C2-allylated product with excellent stereoselectivity.
Collapse
Affiliation(s)
- James Levi Knippel
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yuxuan Ye
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
16
|
Mohareb RM, Milad YR, Mostafa BM, El-Ansary RA. New Approaches for the Synthesis of Heterocyclic Compounds Corporating Benzo[d]imidazole as Anticancer Agents, Tyrosine, Pim-1 Kinases Inhibitions and their PAINS Evaluations. Anticancer Agents Med Chem 2021; 21:327-342. [PMID: 32698742 DOI: 10.2174/1871520620666200721111230] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/08/2020] [Accepted: 06/17/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzo[d]imidazoles are highly biologically active, in addition, they are considered as a class of heterocyclic compounds with many pharmaceutical applications. OBJECTIVE We are aiming in this work to synthesize target molecules that possess not only anti-tumor activities but also kinase inhibitors. The target molecules were obtained starting from the benzo[d]imidazole derivatives followed by their heterocyclization reactions to produce anticancer target molecules. METHODS The 1-(1H-benzo[d]imidazol-2-yl)propan-2-one (3) and the ethyl 2-(1H-benzo[d]imidazol-2- yl)acetate (16) were used as the key starting material which reacted with salicylaldehyde to give the corresponding benzo[4,5]imidazo[1,2-a]quinoline derivatives. On the other hand, both of them were reacted with different reagents to give thiophene, pyran and benzo[4,5]imidazo[1,2-c]pyrimidine derivatives. The synthesized compounds were evaluated against the six cancer cell lines A549, HT-29, MKN-45, U87MG, SMMC-7721, and H460 together with inhibitions toward tyrosine kinases, c-Met kinase and prostate cancer cell line PC-3 using the standard MTT assay in vitro, with foretinib as the positive control. RESULTS Most of the synthesized compounds exhibited high inhibitions toward the tested cancer cell lines. In addition, tyrosine and Pim-1 kinases inhibitions were performed for the most active compounds where the variation of substituent through the aryl ring and heterocyclic ring afforded compounds with high activities. Our analysis showed that there is a strong correlation between the structure of the compound and the substituents of target molecules. CONCLUSION Our present research proved that the synthesized heterocyclic compounds with varieties of substituents have a strong impact on the activity of compounds. The evaluations through different cell lines and tyrosine kinases indicated that the compounds were the excellent candidates as anticancer agents. This could encourage doing further research within this field for the building of compounds with high inhibitions.
Collapse
Affiliation(s)
- Rafat M Mohareb
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | - Yara R Milad
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Egypt
| | - Bahaa M Mostafa
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | - Reem A El-Ansary
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| |
Collapse
|
17
|
Yang Z, Tian Y, Cang S, Zhang L, Liu L. The synthesis of a series of fluorescent emitters and their application for dye lasing and cation sensing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:118978. [PMID: 33038857 DOI: 10.1016/j.saa.2020.118978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 05/13/2023]
Abstract
The following paper reported four carbazole-modified fluorescent emitters. Their molecular structure and electronic transition were analyzed via their single crystal and theoretical calculation. Their photophysical parameters, including absorption, emission and quantum yield, were determined and discussed. It was found that the emission performance of benzo-thiazole-based dyes was better than that of benzo-imidazole-based dyes, owing to the electron-donating effect from the S atom. Upon the presence of metal cations, these photophysical parameters were re-measured. Benzo-thiazole-based dyes were found insensitive towards most metal cations, while benzo-imidazole-based dyes showed obvious photophysical variation upon these metal cations, including absorption red shift and emission quenching. Detailed sensing performance of a representative dye was discussed. A linear working curve with good selectivity was finally observed. Its sensing mechanism was confirmed as the coordination between metal cation and deprotonated benzo-imidazole group. Benzo-thiazole-based dyes showed amplified spontaneous emission (ASE) behavior, with threshold energy of ~220 μJ. Given the optimal condition, a highest ASE efficiency of ~2% was observed, with FWHM value of 6 nm and emission peak of 435 nm. The major novelty and advancement of these fluorescent dyes shall be the stable ASE output (dye 4) under UV excitation and the linear sensing curve with good selectivity (dye 3), which was a hard task for emission turn off sensing probes. We attributed its causation to the valent-recognizing sensing mechanism.
Collapse
Affiliation(s)
- Zixuan Yang
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China.
| | - Yaqiang Tian
- Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan 063210, China
| | - Sheng Cang
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Leiyu Zhang
- Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan 063210, China
| | - Liang Liu
- Green Intelligence Environmental School, Yangtze Normal University, Fuling, Chongqing 408100, China
| |
Collapse
|
18
|
Rong N, Yuan Y, Chen H, Yao C, Li T, Wang Y, Yang W. A practical route to 2-iodoanilines via the transition-metal-free and base-free decarboxylative iodination of anthranilic acids under oxygen. Org Chem Front 2021. [DOI: 10.1039/d1qo00461a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach for synthesizing 2-iodoanilines via the transition-metal-free and base-free decarboxylative ortho-C–H iodination of anthranilic acids with a combination of KI and I2 as the halogen donor and catalyst under oxygen has been developed.
Collapse
Affiliation(s)
- Nianxin Rong
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| | - Yongsheng Yuan
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| | - Huijie Chen
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| | - Changguang Yao
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| | - Teng Li
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| | - Yantao Wang
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| | - Weiran Yang
- Key Laboratory of Poyang lake Environment and Resource Utilization (Nanchang University)
- Ministry of Education
- Jiangxi 330031
- P.R. China
- School of Resource Environmental and Chemical Engineering
| |
Collapse
|
19
|
Skolia E, Apostolopoulou MK, Nikitas NF, Kokotos CG. Photochemical Synthesis of Benzimidazoles from Diamines and Aldehydes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Elpida Skolia
- Laboratory of Organic Chemistry, Department of Chemistry National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Mary K. Apostolopoulou
- Laboratory of Organic Chemistry, Department of Chemistry National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Nikolaos F. Nikitas
- Laboratory of Organic Chemistry, Department of Chemistry National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Christoforos G. Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| |
Collapse
|
20
|
Tzani MA, Gabriel C, Lykakis IN. Selective Synthesis of Benzimidazoles from o-Phenylenediamine and Aldehydes Promoted by Supported Gold Nanoparticles. NANOMATERIALS 2020; 10:nano10122405. [PMID: 33271922 PMCID: PMC7760220 DOI: 10.3390/nano10122405] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 11/25/2020] [Accepted: 11/29/2020] [Indexed: 11/17/2022]
Abstract
We investigated the catalytic efficacy of supported gold nanoparticles (AuNPs) towards the selective reaction between o-phenylenediamine and aldehydes that yields 2-substituted benzimidazoles. Among several supported gold nanoparticle platforms, the Au/TiO2 provides a series of 2-aryl and 2-alkyl substituted benzimidazoles at ambient conditions, in the absence of additives and in high yields, using the mixture CHCl3:MeOH in ratio 3:1 as the reaction solvent. Among the AuNPs catalysts used herein, the Au/TiO2 containing small-size nanoparticles is found to be the most active towards the present catalytic methodology. The Au/TiO2 can be recovered and reused at least five times without a significant loss of its catalytic efficacy. The present catalytic synthetic protocol applies to a broad substrate scope and represents an efficient method for the formation of a C–N bond under mild reaction conditions. Notably, this catalytic methodology provides the regio-isomer of the anthelmintic drug, Thiabendazole, in a lab-scale showing its applicability in the efficient synthesis of such N-heterocyclic molecules at industrial levels.
Collapse
Affiliation(s)
- Marina A. Tzani
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece;
| | - Catherine Gabriel
- HERACLES Research Center, KEDEK, Laboratory of Environmental Engineering (EnvE-Lab), Department of Chemical Engineering, AUTH, 54124 Thessaloniki, Greece;
| | - Ioannis N. Lykakis
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece;
- Correspondence: ; Tel./Fax: +30-2310-997871
| |
Collapse
|
21
|
Abstract
Ascorbic acid is the most well-known vitamin found in different types of food. It has
tremendous medical applications in several different fields such as in pharmaceuticals, cosmetics,
and in organic synthesis. Ascorbic acid can be used as a substrate or mediator in organic synthesis.
In this review, we report ascorbic acid-catalyzed reactions in organic synthesis. Several examples
are included in this review to demonstrate that ascorbic acid is a versatile catalyst for the synthesis
of diverse organic compounds. Reactions catalyzed by ascorbic acid are performed in organic or
aqueous media. The ready availability and easy handling features of ascorbic acid make these procedures
highly fascinating.
Collapse
Affiliation(s)
- Aparna Das
- Department of Mathematics and Natural Sciences, College of Sciences and Human Studies, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
| | - Ram Naresh Yadav
- Department of Chemistry, Faculty of Engineering & Technology, Veer Bahadur Singh Purvanchal University, Jaunpur-222003 (UP), India
| | - Bimal Krishna Banik
- Department of Mathematics and Natural Sciences, College of Sciences and Human Studies, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
| |
Collapse
|
22
|
Pardeshi VAS, Chundawat NS, Pathan SI, Sukhwal P, Chundawat TPS, Singh GP. A review on synthetic approaches of benzimidazoles. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1841239] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | | | | | - Priyal Sukhwal
- Department of Chemistry, Bhupal Nobles’ University, Udaipur, Rajasthan, India
| | | | - Girdhar Pal Singh
- Department of Chemistry, Bhupal Nobles’ University, Udaipur, Rajasthan, India
| |
Collapse
|
23
|
Etazene (N,N-diethyl-2-{[(4-ethoxyphenyl)methyl]-1H-benzimidazol-1-yl}-ethan-1-amine (dihydrochloride)): a novel benzimidazole opioid NPS identified in seized material: crystal structure and spectroscopic characterization. Forensic Toxicol 2020. [DOI: 10.1007/s11419-020-00552-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Abstract
Purpose
The aim of the study was to present the spectroscopic characteristics and crystal structure of the etazene—a benzimidazole opioid, which appeared on the illegal drug market in Poland in the last weeks.
Methods
The title compound was analyzed by X-ray crystallography as well as gas and liquid chromatography combined with mass spectrometry. Spectroscopic techniques have also been used, such as nuclear magnetic resonance, infrared and ultraviolet-visible spectroscopies.
Results
We presented the identification and the broad chemical characterization of etazene, a synthetic opioid that has recently been introduced on the illegal drug market.
Conclusions
In this paper, we described single-crystal X-ray, chromatographic and spectroscopic characterization of a synthetic opioid that emerged on the new psychoactive substance (NPS) market in Poland. To the best of our knowledge, this is the first full characterization of etazene. Analytical data presented in the work can be helpful in identification and detection of the NPS in forensic and clinical laboratories.
Collapse
|
24
|
Basuri P, Gonzalez LE, Morato NM, Pradeep T, Cooks RG. Accelerated microdroplet synthesis of benzimidazoles by nucleophilic addition to protonated carboxylic acids. Chem Sci 2020; 11:12686-12694. [PMID: 34094463 PMCID: PMC8163001 DOI: 10.1039/d0sc02467h] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/13/2020] [Indexed: 12/16/2022] Open
Abstract
We report a metal-free novel route for the accelerated synthesis of benzimidazole and its derivatives in the ambient atmosphere. The synthetic procedure involves 1,2-aromatic diamines and alkyl or aryl carboxylic acids reacting in electrostatically charged microdroplets generated using a nano-electrospray (nESI) ion source. The reactions are accelerated by orders of magnitude in comparison to the bulk. No other acid, base or catalyst is used. Online analysis of the microdroplet accelerated reaction products is performed by mass spectrometry. We provide evidence for an acid catalyzed reaction mechanism based on identification of the intermediate arylamides. Their dehydration to give benzimidazoles occurs in a subsequent thermally enhanced step. It is suggested that the extraordinary acidity at the droplet surface allows the carboxylic acid to function as a C-centered electrophile. Comparisons of this methodology with data from thin film and bulk synthesis lead to the proposal of three key steps in the reaction: (i) formation of an unusual reagent (protonated carboxylic acid) because of the extraordinary conditions at the droplet interface, (ii) accelerated bimolecular reaction because of limited solvation at the interface and (iii) thermally assisted elimination of water. Eleven examples are shown as evidence of the scope of this chemistry. The accelerated synthesis has been scaled-up to establish the substituent-dependence and to isolate products for NMR characterization.
Collapse
Affiliation(s)
- Pallab Basuri
- DST Unit of Nanoscience (DST UNS), Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras Chennai 600036 India
| | - L Edwin Gonzalez
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| | - Nicolás M Morato
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| | - Thalappil Pradeep
- DST Unit of Nanoscience (DST UNS), Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras Chennai 600036 India
| | - R Graham Cooks
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| |
Collapse
|
25
|
Behrouz S, Navid Soltani Rad M, Abdollahzadeh M, Amin Piltan M. Ultrasound‐Promoted Mild, and Efficient Protocol for Three‐Component Synthesis of 2,4,5‐Trisubstituted Imidazoles Using Urea and PPh
3
as the Sources of Nitrogen and Organocatalyst. ChemistrySelect 2020. [DOI: 10.1002/slct.202001722] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Somayeh Behrouz
- Medicinal Chemistry Research Laboratory Department of Chemistry Shiraz University of Technology Shiraz 71555-313 Iran
| | - Mohammad Navid Soltani Rad
- Medicinal Chemistry Research Laboratory Department of Chemistry Shiraz University of Technology Shiraz 71555-313 Iran
| | - Mahla Abdollahzadeh
- Medicinal Chemistry Research Laboratory Department of Chemistry Shiraz University of Technology Shiraz 71555-313 Iran
| | - Mohammad Amin Piltan
- Medicinal Chemistry Research Laboratory Department of Chemistry Shiraz University of Technology Shiraz 71555-313 Iran
| |
Collapse
|
26
|
Treesa GSS, Saranya S, Meera G, Anilkumar G. Recent Advances and Perspectives in the Silver-catalyzed Multi-component Reactions. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200217102036] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The catalytic activity of silver and its salts in various reactions leads to a vast
variety of organic compounds having significant applications in organic synthesis. This
review gives a comprehensive study on silver-catalyzed multi-component reactions that
attracted the interest of the scientific world through ecofriendly, atom-economic and mild
conditions. The silver-catalyzed multi-component synthesis of organic compounds
including aliphatic, aromatic and heterocycles are divided into subsections based on the
types of bond formed and covers literature up to 2019.
Collapse
Affiliation(s)
- G. S. Susan Treesa
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala 686560, India
| | - Salim Saranya
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala 686560, India
| | - Gopinadh Meera
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala 686560, India
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala 686560, India
| |
Collapse
|
27
|
Hebishy AMS, Abdelfattah MS, Elmorsy A, Elwahy AHM. Synthesis of novel bis‐ and poly(benzimidazoles) as well as bis‐ and poly(benzothiazoles) as anticancer agents. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3947] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Ali M. S. Hebishy
- Chemistry Department, Faculty of ScienceHelwan University Cairo Egypt
| | | | - Abdullah Elmorsy
- Chemistry Department, Faculty of ScienceHelwan University Cairo Egypt
| | | |
Collapse
|
28
|
Wang Y, Yu P, Ren Q, Jia F, Chen Y, Wu A. Synthesis of 2,1-Benzoisoxazole-Containing 1,2,3-Triazoles through Copper-Catalyzed Three-Component Domino Reactions of o-Bromoacetophenones, Aldehydes, and Sodium Azide. J Org Chem 2020; 85:2688-2696. [DOI: 10.1021/acs.joc.9b02865] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yuwei Wang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, People’s Republic of China
| | - Pei Yu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, People’s Republic of China
| | - Qingyun Ren
- The State Key Laboratory of Anti-Infection Drug Development, HEC Pharma Group, Dongguan 523871, People’s Republic of China
| | - Fengcheng Jia
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, People’s Republic of China
| | - Yunfeng Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, People’s Republic of China
| | - Anxin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People’s Republic of China
| |
Collapse
|
29
|
Sankar V, Karthik P, Neppolian B, Sivakumar B. Metal–organic framework mediated expeditious synthesis of benzimidazole and benzothiazole derivatives through an oxidative cyclization pathway. NEW J CHEM 2020. [DOI: 10.1039/c9nj04431k] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein, we report facile synthesis of various benzimidazoles and benzothiazoles by using the NH2-MIL-125(Ti) MOF as an efficient oxidant-free heterogeneous catalyst with good yield.
Collapse
Affiliation(s)
- Velayudham Sankar
- Department of Chemistry and SRM Research Institute
- SRM Institute of Science and Technology
- Chennai-603203
- India
| | - Peramaiah Karthik
- Department of Chemistry and SRM Research Institute
- SRM Institute of Science and Technology
- Chennai-603203
- India
| | - Bernaurdshaw Neppolian
- Department of Chemistry and SRM Research Institute
- SRM Institute of Science and Technology
- Chennai-603203
- India
| | - Bitragunta Sivakumar
- Department of Chemistry and SRM Research Institute
- SRM Institute of Science and Technology
- Chennai-603203
- India
- Department of Chemistry
| |
Collapse
|
30
|
Hypervalent iodine(III) catalyzed rapid and efficient access to benzimidazoles, benzothiazoles and quinoxalines: Biological evaluation of some new benzimidazole-imidazo[1,2-a]pyridine conjugates. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2017.02.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
|
31
|
Li G, He R, Liu Q, Wang Z, Liu Y, Wang Q. Formation of Amidinyl Radicals via Visible-Light-Promoted Reduction of N-Phenyl Amidoxime Esters and Application to the Synthesis of 2-Substituted Benzimidazoles. J Org Chem 2019; 84:8646-8660. [PMID: 31198038 DOI: 10.1021/acs.joc.9b01158] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have developed a new method for the synthesis of 2-substituted benzimidazoles via amidinyl radicals generated by visible-light-promoted reduction of N-phenyl amidoxime esters in the presence of an iridium photocatalyst. This is the first report of the use of N-phenyl amidoxime esters as amidinyl radical precursors, and the first use of substituted benzene rings as amidinyl radical acceptors. This method widens the application range of substrates and overcomes the shortcomings of the traditional methods for the synthesis of 2-substituted benzimidazoles, which requires harsh reaction conditions, involves difficult-to-prepare substituted o-phenylenediamine substrates, and produces acidic waste.
Collapse
Affiliation(s)
- Gang Li
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
| | - Ru He
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
| | - Qiang Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
| | - Ziwen Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry , Tianjin Normal University , Tianjin 300387 , China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
| |
Collapse
|
32
|
Shaik BV, Seelam M, Tamminana R, Kammela PR. Copper promoted C-S and C-N cross-coupling Reactions:The synthesis of 2-(N-Aryolamino)benzothiazoles and 2-(N-Aryolamino)benzimidazoles. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.006] [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]
|
33
|
Metal-free selective synthesis of 2-substituted benzimidazoles catalyzed by Brönsted acidic ionic liquid: Convenient access to one-pot synthesis of N-alkylated 1,2-disubstituted benzimidazoles. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Rapolu T, K. V. P. PK, Babu KR, Dende SK, Nimmareddy RR, Reddy LK. Microwave assisted one pot synthesis of 2-ethylamino benzimidazole, benzoxazole and benzothiazole derivatives. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1599952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Thirupathi Rapolu
- Medicinal Chemistry Division, GVK Biosciences Private Limited, Hyderabad, India
- Department of Engineering Chemistry, Andhra University College of Engineering (A), Visakhapatnam, India
| | | | - Korupolu Raghu Babu
- Department of Engineering Chemistry, Andhra University College of Engineering (A), Visakhapatnam, India
| | - Satheesh Kumar Dende
- Medicinal Chemistry Division, GVK Biosciences Private Limited, Hyderabad, India
- Department of Engineering Chemistry, Andhra University College of Engineering (A), Visakhapatnam, India
| | - Rajashekar Reddy Nimmareddy
- Medicinal Chemistry Division, GVK Biosciences Private Limited, Hyderabad, India
- Department of Engineering Chemistry, Andhra University College of Engineering (A), Visakhapatnam, India
| | | |
Collapse
|
35
|
Ke F, Zhang P, Lin C, Lin X, Xu J, Zhou X. Synthesis of benzimidazoles by CuI-catalyzed three-component reaction of 2-haloaniline, ammonia and aldehyde in water. Org Biomol Chem 2019; 16:8090-8094. [PMID: 30328461 DOI: 10.1039/c8ob02172d] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient copper-catalyzed three-component reaction of 2-haloaniline, ammonia and aldehyde for the synthesis of benzimidazoles with 1,10-phenanthroline as the ligand has been developed. A variety of substituted benzimidazole derivatives can be obtained in yields up to 95%.
Collapse
Affiliation(s)
- Fang Ke
- College of Pharmacy, Fujian Medical University, Fuzhou 350004, China.
| | | | | | | | | | | |
Collapse
|
36
|
Studies on the synthesis, characterization, cytotoxic activities and plasmid DNA binding of platinum(II) complexes having 2-subsituted benzimidazole ligands. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
37
|
Garazhian Z, Rezaeifard A, Jafarpour M. A nanoscopic icosahedral {Mo72Fe30} cluster catalyzes the aerobic synthesis of benzimidazoles. RSC Adv 2019; 9:34854-34861. [PMID: 35530665 PMCID: PMC9074170 DOI: 10.1039/c9ra06581d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/19/2019] [Indexed: 01/20/2023] Open
Abstract
In this study, the catalytic efficiency of amorphous {Mo72Fe30} nanocapsules as a safe Keplerate polyoxometalate in organic synthesis was exploited. The easy-made solid catalyst exhibited high efficiency using a very low dosage (0.02–0.05 mol%) in the catalyzed condensation of various aromatic 1,2-diamines and aldehydes for the aerobic synthesis of benzimidazoles with very small E-factor values (0.11–0.33). The superior catalytic activity of amorphous nanoclusters compared to that of its crystalline counterpart was demonstrated. The high activity and recyclability of heterogeneous catalysts in a green reaction media under oxygen atmosphere, make this environmentally benign organic process appropriate for our applied goals. Catalytic activity of amorphous {Mo72Fe30} nanoclusters as a safe Keplerate polyoxometalate in aerobic synthesis of benzimidazoles was described.![]()
Collapse
Affiliation(s)
- Zohreh Garazhian
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| |
Collapse
|
38
|
Fu Z, Jiang Y, Jiang L, Li Z, Guo S, Cai H. Cu-catalyzed decarboxylative iodination of aryl carboxylic acids with NaI: A practical entry to aryl iodides under aerobic conditions. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
39
|
Belkharchach S, Elayadi H, Ighachane H, Sebti S, Ali MA, Lazrek HB. p-Toluenesulfonic Acid Coated Natural Phosphate as an Efficient Catalyst for the Synthesis of 2-Substituted Benzimidazole. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15420201703363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2-Substituted benzimidazoles are selectively synthesised in high yields via the condensation of o-phenylenediamine derivatives with aldehyde derivatives using catalytic amount of p-toluenesulfonic acid coated natural phosphate (NP/PTSA) under mild conditions. The use of NP/PTSA as a reusable catalyst makes this process simple, convenient, and environmentally friendly.
Collapse
Affiliation(s)
- Soumia Belkharchach
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech 40000, Morocco
| | - Hanane Elayadi
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech 40000, Morocco
| | - Hana Ighachane
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech 40000, Morocco
| | - Said Sebti
- Laboratory of Organic Chemistry Catalysis and Environment, University Hassan II Casablanca, Faculty of Sciences Ben M'sik, Casablanca, Morocco
| | - Mustapha Ait Ali
- Laboratory of Coordination Chemistry and Catalysis, Faculty of Science Semlalia, Marrakech 40000, Morocco
| | - Hassan B. Lazrek
- Laboratory of Biomolecular and Medicinal Chemistry, Faculty of Science Semlalia, Marrakech 40000, Morocco
| |
Collapse
|
40
|
Sharma RK, Yadav S, Sharma S, Dutta S, Sharma A. Expanding the Horizon of Multicomponent Oxidative Coupling Reaction via the Design of a Unique, 3D Copper Isophthalate MOF-Based Catalyst Decorated with Mixed Spinel CoFe 2O 4 Nanoparticles. ACS OMEGA 2018; 3:15100-15111. [PMID: 31458175 PMCID: PMC6643414 DOI: 10.1021/acsomega.8b02061] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 10/25/2018] [Indexed: 05/25/2023]
Abstract
This work discloses the first ever magnetically retrievable copper isophthalate-based metal-organic framework (MOF) decorated with surface-modified cobalt ferrite (CoFe2O4) nanoparticles that have been utilized as catalytic reactors for obtaining a relatively large number of biologically active benzimidazole scaffolds. A facile one-pot solvothermal approach was employed for obtaining spherical and monodisperse CoFe2O4 nanoparticles, which were subsequently modified using suitable protecting and functionalizing agents. Finally, these functionalized magnetic nanoparticles were anchored onto the three-dimensional copper isophthalate MOF via a covalent immobilization methodology. The exploitation of advanced microscopic tools such as transmission electron microscopy and scanning electron microscopy provided valuable insights into the morphology of the immobilized MOF. These results indicated that the surface-modified magnetic nanoparticles had grown onto the surface of copper-5-nitroisophthalic acid MOF. A greener C-H functionalization strategy that involves the multicomponent oxidative cross-coupling between two different set of amines (sp2-hybridized nitrogen-containing anilines and sp3-hybridized nitrogen-containing alkyl/aryl amine derivatives) and sodium azide has been incorporated to provide access to a broad spectrum of the value-added target benzimidazole moieties. It is interesting to note that this magnetic MOF-catalyzed protocol not only replaces toxic solvents with water, which is a green solvent, but also enhances the economic competitiveness since the magnetic catalyst can be readily recovered and recycled for eight consecutive runs.
Collapse
Affiliation(s)
- Rakesh K. Sharma
- Department of Chemistry,
Green Chemistry Network Centre, University
of Delhi, New Delhi 110007, India
| | - Sneha Yadav
- Department of Chemistry,
Green Chemistry Network Centre, University
of Delhi, New Delhi 110007, India
| | - Shivani Sharma
- Department of Chemistry,
Green Chemistry Network Centre, University
of Delhi, New Delhi 110007, India
| | - Sriparna Dutta
- Department of Chemistry,
Green Chemistry Network Centre, University
of Delhi, New Delhi 110007, India
| | - Aditi Sharma
- Department of Chemistry,
Green Chemistry Network Centre, University
of Delhi, New Delhi 110007, India
| |
Collapse
|
41
|
Kondraganti L, Manabolu SB, Dittakavi R. Synthesis of Benzimidazoles
via
Domino Intra and Intermolecular
C‐N
Cross‐Coupling Reaction. ChemistrySelect 2018. [DOI: 10.1002/slct.201802754] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lakshmi Kondraganti
- Department of ChemistryJawaharlal Nehru Technological University Kakinada Kakinada- 533 003 Andhra Pradesh India
| | - Surendra babu Manabolu
- Department of ChemistryInstitution: GITAM School of Technology, GITAM University HTP campus, Rudraram, Medak 502 329 Telangana India
| | | |
Collapse
|
42
|
Mamedov VA, Khafizova EA, Syakaev VV, Gubaidullin AT, Samigullina AI, Algaeva NE, Latypov SK. The rearrangement of 1H,1′H-spiro[quinoline-4,2′-quinoxaline]-2,3′ (3H,4′H)-diones – a new and efficient method for the synthesis of 4-(benzimidazol-2-yl)quinolin-2(1H)-ones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
43
|
Balinge KR, Datir SK, Khajone VB, Bhansali KJ, Khiratkar AG, Bhagat PR. Iron(III)–salen complex on a polymer scaffold as heterogeneous catalyst for synthesis of benzimidazoles. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3595-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
44
|
Saha M, Das AR. I2/TBHP promoted oxidative C–N bond formation at room temperature: Divergent access of 2-substituted benzimidazoles involving ring distortion. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.05.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
45
|
Mohareb RM, Abdallah AEM, Mohamed AA. Synthesis of Novel Thiophene, Thiazole and Coumarin Derivatives Based on Benzimidazole Nucleus and Their Cytotoxicity and Toxicity Evaluations. Chem Pharm Bull (Tokyo) 2018; 66:309-318. [PMID: 29491264 DOI: 10.1248/cpb.c17-00922] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The reactivity of compounds 2-(1-(2-chloroacetyl)-1H-benzo[d]imidazol-2-yl)acetonitrile 2 and 3-(1-(2-chloroacetyl)-1H-benzo[d]imidazol-2-yl)-2H-chromen-2-one 8 towards different chemical reagents were studied and a series of novel benzimidazole derivatives were obtained (2-6a-d and 8-12a-d). Moreover, in vitro growth inhibitory effect of the newly synthesized compounds were evaluated in term of [IC50 µM] against the six cancer cell lines, human lung carcinoma (A549), lung cancer (H460), human colorectal (HT29), gasteric cancer cell (MKN-45), glioma cell line (U87MG) and cellosaurus cell line (SMMC-7721) where foretinib was used as standard reference. The results showed that compounds 2 (only for A549 cell line), 3a, 4, 6c, 6d, 8, 9a, 9e and 9f were the most active compounds towards the six cancer cell lines. On the other hand, the toxicity of these most potent compounds against shrimp larvae indicated that compounds 3a, 4, 6d, 9e and 9f were non toxic while compounds 6c and 8 were very toxic and compounds 2 and 9a were harmful against the tested organisms.
Collapse
|
46
|
Behrouz S. Copper-doped silica cuprous sulfate: A highly efficient heterogeneous nano-catalyst for one-pot three-component synthesis of 1- H -2-substituted benzimidazoles from 2-bromoanilines, aldehydes, and [bmim]N 3. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2016.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
47
|
Bhagat SB, Ghodse SM, Telvekar VN. Sodium dichloroiodate promoted C-C bond cleavage: An efficient synthesis of 1,3-Benzazoles via condensation of $${\varvec{o}}$$ o -amino/mercaptan/hydroxyanilines with $${\varvec{\beta }}$$ β -diketones. J CHEM SCI 2018. [DOI: 10.1007/s12039-017-1414-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
48
|
Fazlinia A, Sheikh S. Preparation of 2-Arylbenzimidazole derivatives using CuO nanoparticles /H2O2 system. INORG NANO-MET CHEM 2018. [DOI: 10.1080/24701556.2017.1358182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Abbas Fazlinia
- Department of Chemistry, Zarghan Branch, Islamic Azad University, Zarghan, Iran
| | - Setareh Sheikh
- Department of Chemistry, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| |
Collapse
|
49
|
Guan Q, Sun Q, Wen L, Zha Z, Yang Y, Wang Z. The synthesis of benzimidazoles via a recycled palladium catalysed hydrogen transfer under mild conditions. Org Biomol Chem 2018; 16:2088-2096. [DOI: 10.1039/c8ob00323h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient synthesis of benzimidazoles was developed by virtue of a recycled palladium catalyzed hydrogen transfer.
Collapse
Affiliation(s)
- Qianqian Guan
- Hefei National Laboratory for Physical Sciences at Microscale
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences
- Collaborative Innovation Center of Suzhou Nano Science and Technology & Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Qi Sun
- Hefei National Laboratory for Physical Sciences at Microscale
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences
- Collaborative Innovation Center of Suzhou Nano Science and Technology & Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Lixian Wen
- Hefei National Laboratory for Physical Sciences at Microscale
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences
- Collaborative Innovation Center of Suzhou Nano Science and Technology & Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences
- Collaborative Innovation Center of Suzhou Nano Science and Technology & Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Yu Yang
- Hefei National Laboratory for Physical Sciences at Microscale
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences
- Collaborative Innovation Center of Suzhou Nano Science and Technology & Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences
- Collaborative Innovation Center of Suzhou Nano Science and Technology & Department of Chemistry
- University of Science and Technology of China
- Hefei
| |
Collapse
|
50
|
An efficient NaHSO3-promoted protocol for chemoselective synthesis of 2-substituted benzimidazoles in water. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0367-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|