1
|
Teng QH, Lu FL, Wang K, Zhou LY, Li DP. Chemodivergent Photocatalyzed Heterocyclization of Hydrazones and Isothiocyanates for the Selectivity Synthesis of 2-Amino-1,3,4-thiadiazoles and 1,2,4-Triazole-3-thiones. J Org Chem 2023. [PMID: 37141629 DOI: 10.1021/acs.joc.3c00320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A photocatalytic chemodivergent reaction for the selectivity formation of C-S and C-N bonds in a controlled manner was proposed. The reaction medium, either neutral or acidic, is critical to dictate the formation of 2-amino-1,3,4-thiadiazoles and 1,2,4-triazole-3-thiones from isothiocyanates and hydrazones. This is a practical protocol to achieve the chemoselectivity under mild and metal-free conditions.
Collapse
Affiliation(s)
- Qing-Hu Teng
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Feng-Lai Lu
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
| | - Kai Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Li-Ya Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Dian-Peng Li
- Guangxi Key Laboratory of Plant Functional Phytochemicals and Sustainable Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, P. R. China
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| |
Collapse
|
2
|
Chawla G, Pradhan T, Gupta O, Manaithiya A, Jha DK. An updated review on diverse range of biological activities of 1,2,4-triazole derivatives: Insight into structure activity relationship. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
3
|
The Chemo- and Regioselectivity of the Cyclization of Thiosemicarbazides with Haloacetic Acids and their Derivatives. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03117-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
4
|
Kujur S, Verma S, Kumar A, Sharma R, Pathak DD. A green polyol approach for the synthesis of Cu 2O NPs adhered on graphene oxide: a robust and efficient catalyst for 1,2,4-triazole and imidazo[1,2- a]pyridine synthesis. NEW J CHEM 2022. [DOI: 10.1039/d2nj00831a] [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
Cu2O NPs immobilized on graphene oxide are used as a heterogeneous catalyst for the synthesis of a series of 1,2,4-triazoles and imidazo[1,2-a]pyridines under solvent-free conditions.
Collapse
Affiliation(s)
- Shelly Kujur
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, India
| | - Shruti Verma
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, India
| | - Akash Kumar
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, India
| | - Richa Sharma
- Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Dayalbagh, Agra, 282005, India
| | - Devendra Deo Pathak
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, India
| |
Collapse
|
5
|
Matesanz AI, Herrero JM, Quiroga AG. Chemical and Biological Evaluation of Thiosemicarbazone-Bearing Heterocyclic Metal Complexes. Curr Top Med Chem 2021; 21:59-72. [PMID: 33092510 DOI: 10.2174/1568026620666201022144004] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/06/2020] [Accepted: 09/14/2020] [Indexed: 01/07/2023]
Abstract
Thiosemicarbazones (TSCNs) constitute a broad family of compounds (R1R2C=N-NH-C(S)- NR3R4), particularly attractive because many of them display some biological activity against a wide range of microorganisms and cancer cells. Their activity can be related to their electronic and structural properties, which offer a rich set of donor atoms for metal coordination and a high electronic delocalization providing different binding modes for biomolecules. Heterocycles such as pyrrole, imidazole and triazole are present in biological molecules such as Vitamine B12 and amino acids and could potentially target multiple biological processes. Considering this, we have explored the chemistry and biological properties of thiosemicarbazones series and their complexes bearing heterocycles such as pyrrole, imidazole, thiazole and triazole. We focus at the chemistry and cytotoxicity of those derivatives to find out the structure activity relationships, and particularly we analyzed those examples with the TSCN units in which the mechanism of action information has been profoundly studied and pathways determined, to promote future studies for heterocycle derivatives.
Collapse
Affiliation(s)
- Ana I Matesanz
- Departamento Quimica Inorganica, Universidad Autonoma de Madrid, Madrid, Spain
| | - Jorge M Herrero
- Departamento Quimica Inorganica, Universidad Autonoma de Madrid, Madrid, Spain
| | - Adoración G Quiroga
- Departamento Quimica Inorganica, Universidad Autonoma de Madrid, Madrid, Spain
| |
Collapse
|
6
|
Morais PAB, Francisco CS, de Paula H, Ribeiro R, Eloy MA, Javarini CL, Neto ÁC, Júnior VL. Semisynthetic Triazoles as an Approach in the Discovery of Novel Lead Compounds. CURR ORG CHEM 2021. [DOI: 10.2174/1385272825666210126100227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Historically, medicinal chemistry has been concerned with the approach of organic
chemistry for new drug synthesis. Considering the fruitful collections of new molecular entities,
the dedicated efforts for medicinal chemistry are rewarding. Planning and search for new
and applicable pharmacologic therapies involve the altruistic nature of the scientists. Since
the 19th century, notoriously applying isolated and characterized plant-derived compounds in
modern drug discovery and various stages of clinical development highlight its viability and
significance. Natural products influence a broad range of biological processes, covering transcription,
translation, and post-translational modification, being effective modulators of most
basic cellular processes. The research of new chemical entities through “click chemistry”
continuously opens up a map for the remarkable exploration of chemical space towards leading
natural products optimization by structure-activity relationship. Finally, in this review, we expect to gather a
broad knowledge involving triazolic natural product derivatives, synthetic routes, structures, and their biological activities.
Collapse
Affiliation(s)
- Pedro Alves Bezerra Morais
- Centro de Ciencias Exatas, Naturais e da Saude, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Carla Santana Francisco
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| | - Heberth de Paula
- Centro de Ciencias Exatas, Naturais e da Saude, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Rayssa Ribeiro
- Programa de Pos- Graduacao em Agroquimica, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Mariana Alves Eloy
- Programa de Pos- Graduacao em Agroquimica, Universidade Federal do Espirito Santo, 29500000, Alegre, ES, Brazil
| | - Clara Lirian Javarini
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| | - Álvaro Cunha Neto
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| | - Valdemar Lacerda Júnior
- Programa de Pos-Graduacao em Quimica, Universidade Federal do Espirito Santo, 29075910, Vitória, ES, Brazil
| |
Collapse
|
7
|
Abdel-Megid M. Part –IV: Utilities of active methylene compounds and heterocycles bearing active methyl or having an active methine in the synthesis of triazoles, pyridazines, triazines and diazepines. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2020.1865404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Mohamed Abdel-Megid
- Chemistry Department, Faculty of Education, Ain-Shams University, Cairo, Egypt
- College of Science and Humanities at Hurymmila, Shaqra University, Shaqraa, Saudi Arabia
| |
Collapse
|
8
|
Synthesis, antimicrobial and antioxidant evaluation, and molecular docking study of 4,5-disubstituted 1,2,4-triazole-3-thiones. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128273] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
9
|
Chen JY, Selvaraju M, Lin YT, Dhole S, Lin CY, Sun CM. Molecular Iodine-Promoted [3 + 2] Oxidative Cyclization for the Synthesis of Heteroarene-Fused [1,2,4] Thiadiazoles/Selenadiazoles. J Org Chem 2020; 85:5570-5579. [PMID: 32249566 DOI: 10.1021/acs.joc.0c00421] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Two new classes of heteroarene-fused [1,2,4]thiadiazole and [1,2,4]selenadiazole are synthesized through the iodine-mediated [3 + 2] oxidative cyclization of 2-aminoheteroarenes and isothiocyanates/isoselenocyanates. This oxidative [3 + 2] annulation strategy is highly regiospecific to proceed a selective C-N bond formation at the endo-nitrogen of 2-aminoheteroarenes followed by an intramolecular oxidative N-S/N-Se bond formation. It is the first example of an I2-mediated oxidative nitrogen-selenium (N-Se) bond formation.
Collapse
Affiliation(s)
- Jin-Yu Chen
- Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300-10, Taiwan
| | - Manikandan Selvaraju
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Yen-Tzu Lin
- Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300-10, Taiwan
| | - Sandip Dhole
- Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300-10, Taiwan
| | - Chih-Yu Lin
- Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300-10, Taiwan
| | - Chung-Ming Sun
- Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300-10, Taiwan.,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung 807-08, Taiwan
| |
Collapse
|
10
|
Zhu F, Yan Z, Ai C, Wang Y, Lin S. I2
Promoted Synthesis of 2-Aminothiadiazoles Employing KSCN as a Sulfur Source Under Metal-Free Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Fuyuan Zhu
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Zhaohua Yan
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Chengmei Ai
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Yanmei Wang
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| | - Sen Lin
- College of Chemistry; Nanchang University; 999 Xuefu Dadao 330031 Nanchang Jiangxi Province P. R. China
| |
Collapse
|
11
|
Jain A, Piplani P. Exploring the Chemistry and Therapeutic Potential of Triazoles: A Comprehensive Literature Review. Mini Rev Med Chem 2019; 19:1298-1368. [DOI: 10.2174/1389557519666190312162601] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 02/28/2019] [Accepted: 03/06/2019] [Indexed: 12/20/2022]
Abstract
:
Triazole is a valuable platform in medicinal chemistry, possessing assorted pharmacological
properties, which could play a major role in the common mechanisms associated with various disorders
like cancer, infections, inflammation, convulsions, oxidative stress and neurodegeneration. Structural
modification of this scaffold could be helpful in the generation of new therapeutically useful
agents. Although research endeavors are moving towards the growth of synthetic analogs of triazole,
there is still a lot of scope to achieve drug discovery break-through in this area. Upcoming therapeutic
prospective of this moiety has captured the attention of medicinal chemists to synthesize novel triazole
derivatives. The authors amalgamated the chemistry, synthetic strategies and detailed pharmacological
activities of the triazole nucleus in the present review. Information regarding the marketed triazole derivatives
has also been incorporated. The objective of the review is to provide insights to designing and
synthesizing novel triazole derivatives with advanced and unexplored pharmacological implications.
Collapse
Affiliation(s)
- Ankit Jain
- Department of Pharmaceutical Chemistry, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh- 160014, India
| | - Poonam Piplani
- Department of Pharmaceutical Chemistry, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh- 160014, India
| |
Collapse
|
12
|
A green one-pot synthesis of 3(5)-substituted 1,2,4-triazol-5(3)-amines as potential antimicrobial agents. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2019. [DOI: 10.1007/s13738-019-01714-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
13
|
Pelivan K, Frensemeier L, Karst U, Koellensperger G, Bielec B, Hager S, Heffeter P, Keppler BK, Kowol CR. Understanding the metabolism of the anticancer drug Triapine: electrochemical oxidation, microsomal incubation and in vivo analysis using LC-HRMS. Analyst 2018; 142:3165-3176. [PMID: 28745337 DOI: 10.1039/c7an00902j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
α-N-Heterocyclic thiosemicarbazones are among the most promising ribonucleotide reductase inhibitors identified so far. Triapine, the most prominent representative of this class of substances, has been investigated in multiple phase I and II clinical trials. With regard to clinical practice, Triapine showed activity against hematological diseases, but ineffectiveness against a variety of solid tumors. However, the reasons are still vague and the amount of ADME (absorption, distribution, metabolism and excretion) data for Triapine available in the literature is very limited. Therefore, different analytical tools were used to investigate the metabolism of Triapine including electrochemical oxidations, liver microsomes and in vivo samples from mice. The main metabolic reactions, observed by all three methods, were dehydrogenation and hydroxylations, confirming that electrochemistry, as a purely instrumental approach, can be applied for the simulation of metabolic pathways. The dehydrogenated metabolite M1 was identified as a thiadiazole ring-closed oxidation product of Triapine. From a biological point of view, M1, as a key metabolite, is of interest since the crucial chemical property of α-N-heterocyclic thiosemicarbazones to bind metal ions is lost and cytotoxicity studies showed no anticancer activity of M1. The in vivo data of the urine samples revealed very high levels of the metabolites and Triapine itself already 15 min after treatment. This clearly indicates that Triapine is rapidly metabolised and excreted, which represents an important step forward to understand the possible reason for the inefficiency of Triapine against solid tumors.
Collapse
Affiliation(s)
- Karla Pelivan
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, 1090 Vienna, Austria.
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Behera A, Rakshit A, Sahoo AK, Patel BK. One Pot Sequential Synthesis of N
-[2-(Phenylsulfinyl)phenyl]acetamides: A Ring Opening Rearrangement Functionalization (RORF). European J Org Chem 2018. [DOI: 10.1002/ejoc.201801597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ahalya Behera
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| | - Amitava Rakshit
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| | - Ashish K. Sahoo
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| | - Bhisma K. Patel
- Department of Chemistry; Indian Institute of Technology Guwahati; 781 039 North Guwahati Assam India
| |
Collapse
|
15
|
Aly AA, Hassan AA, AbdEl-latief ESSM. An Update of the Use of Thiocarbohydrazides and Thiosemicarbazides in the Preparation of Heterocycles and Their Biological Importance. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3295] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ashraf A. Aly
- Chemistry Department, Faculty of Science; Minia University; El-Minia 61519 Egypt
| | - Alaa A. Hassan
- Chemistry Department, Faculty of Science; Minia University; El-Minia 61519 Egypt
| | | |
Collapse
|
16
|
Tarai A, Baruah JB. Four-coordinated see-sawN-(aryl)-2-(propan-2-ylidene)hydrazinecarbothioamide complexes of nickel(ii), copper(ii) and zinc(ii) and their propensity for catalytic cyclisation. Dalton Trans 2018; 47:4921-4930. [DOI: 10.1039/c8dt00453f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four-coordinated metal complexes of two hydrazinecarbothioamide-derived ligands with divalent nickel, copper and zinc are described and the selective reactivity difference of copper(ii) to cyclise the ligand or to form a complex is described.
Collapse
Affiliation(s)
- Arup Tarai
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati -781 039
- India
| | - Jubaraj B. Baruah
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati -781 039
- India
| |
Collapse
|
17
|
Cui X, Liu X, Wang X, Tian W, Wei D, Huang G. Copper-Catalyzed ortho
-Thiomethylation of Benzamides via 8-Aminoquinoline-Assisted C-H Activation with Dimethyl Sulfoxide. ChemistrySelect 2017. [DOI: 10.1002/slct.201702046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xinfeng Cui
- State Key Laboratory of Applied Organic Chemistry; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province; Department of Chemistry; Lanzhou University; Lanzhou 730000 China
| | - Xingxing Liu
- State Key Laboratory of Applied Organic Chemistry; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province; Department of Chemistry; Lanzhou University; Lanzhou 730000 China
| | - Xiajun Wang
- State Key Laboratory of Applied Organic Chemistry; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province; Department of Chemistry; Lanzhou University; Lanzhou 730000 China
| | - Wanfa Tian
- State Key Laboratory of Applied Organic Chemistry; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province; Department of Chemistry; Lanzhou University; Lanzhou 730000 China
| | - Daidong Wei
- State Key Laboratory of Applied Organic Chemistry; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province; Department of Chemistry; Lanzhou University; Lanzhou 730000 China
| | - Guosheng Huang
- State Key Laboratory of Applied Organic Chemistry; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province; Department of Chemistry; Lanzhou University; Lanzhou 730000 China
| |
Collapse
|
18
|
Baeten M, Maes BU. Carbon–Nitrogen Bond Formation Through Cross-Dehydrogenative Coupling Reactions. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2017. [DOI: 10.1016/bs.adomc.2017.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
19
|
Vidyacharan S, Murugan A, Sharada DS. C(sp(2))-H Functionalization of 2H-Indazoles at C3-Position via Palladium(II)-Catalyzed Isocyanide Insertion Strategy Leading to Diverse Heterocycles. J Org Chem 2016; 81:2837-48. [PMID: 26954483 DOI: 10.1021/acs.joc.6b00048] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Herein, we have reported an efficient Pd-catalyzed C-H functionalization of 2H-indazole at C3-position via an isocyanide insertion strategy for the synthesis of unprecedented benzoxazinoindazoles, indazoloquinaoxalines and benzoxazinoindazolones for the first time. Our new method provides an operationally simple and versatile route for a selective synthesis of 2-(2H-indazol-2-yl)phenols. Furthermore, we developed a sequential one-pot strategy for the synthesis of benzoxazinoindazolone under metal-oxidant-free conditions. We also achieved the isocyanide insertion between C(sp(2))-H and oxygen heteroatom for the first time. The key features of the present protocol are construction of 4 bonds in one-pot, synthesis of new skeletally diverse scaffolds, broad substrate scope, high yields and environmentally benign conditions.
Collapse
Affiliation(s)
- Shinde Vidyacharan
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi, Sangareddy, Medak District 502285, Telangana, India
| | - Arumugavel Murugan
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi, Sangareddy, Medak District 502285, Telangana, India
| | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi, Sangareddy, Medak District 502285, Telangana, India
| |
Collapse
|
20
|
Singh SJ, Rajamanickam S, Gogoi A, Patel BK. Synthesis of 2-amino-substituted-1,3,4-thiadiazoles via 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) mediated intramolecular C–S bond formation in thiosemicarbazones. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.083] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
21
|
Ali W, Modi A, Behera A, Mohanta PR, Patel BK. Cs2CO3 as a source of carbonyl and ethereal oxygen in a Cu-catalysed cascade synthesis of benzofuran [3,2-c] quinolin-6[5-H]ones. Org Biomol Chem 2016; 14:5940-4. [DOI: 10.1039/c6ob01029f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Simultaneous construction of C–C, C–O, and C–N bonds utilizing Cs2CO3 as a source of carbonyl (CO) and ethereal oxygen and a cascade synthesis of benzofuro[3,2-c]quinolin-6(5H)-one are achieved using a combination of Cu(OAc)2 and Ag2CO3.
Collapse
Affiliation(s)
- Wajid Ali
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Anju Modi
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Ahalya Behera
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | | | - Bhisma K. Patel
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| |
Collapse
|