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Abonia R, Insuasty D, Laali KK. Recent Advances in the Synthesis of Propargyl Derivatives, and Their Application as Synthetic Intermediates and Building Blocks. Molecules 2023; 28:molecules28083379. [PMID: 37110613 PMCID: PMC10146578 DOI: 10.3390/molecules28083379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 04/05/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
The propargyl group is a highly versatile moiety whose introduction into small-molecule building blocks opens up new synthetic pathways for further elaboration. The last decade has witnessed remarkable progress in both the synthesis of propargylation agents and their application in the synthesis and functionalization of more elaborate/complex building blocks and intermediates. The goal of this review is to highlight these exciting advances and to underscore their impact.
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Affiliation(s)
- Rodrigo Abonia
- Research Group of Heterocyclic Compounds, Department of Chemistry, Universidad del Valle, Cali A.A. 25360, Colombia
| | - Daniel Insuasty
- Grupo de Investigación en Química y Biología, Departamento de Química y Biología, Universidad del Norte, Barranquilla 081007, Atlántico, Colombia
| | - Kenneth K Laali
- Department of Chemistry, University of North Florida, 1 UNF Drive, Jacksonville, FL 32224, USA
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2
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Sharma R, Chaudhary S. Regiodivergent Cu-Promoted, AcOH-Switchable Distal Versus Proximal Direct Cyanation of 1-Aryl-1 H-indazoles and 2-Aryl-2 H-indazoles via Aerobic Oxidative C-H Bond Activation. J Org Chem 2022; 87:16188-16203. [PMID: 36417354 DOI: 10.1021/acs.joc.2c01603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A copper-promoted regiodivergent, AcOH-switchable, distal and proximal direct cyanation of N-aryl-(1H/2H)-indazoles via aerobic oxidative C(sp2)-H bond activation has been developed. The inclusion or exclusion of AcOH as an additive is the foremost cause for the positional switch in the C-CN bond formation method that results in (C-2')-cyanated 2-aryl-2H-indazoles 3a-j, (C-2')-cyanated 1-aryl-1H-indazoles 4a-j [distal], or C-3 cyanated 2-aryl-2H-indazoles 5a-i [proximal] products in good to excellent yields and showed various functional group tolerance. The cyanide (CN-) ion surrogate was generated via the unification of dimethylformamide and ammonium iodide (NH4I). The utilization of molecular oxygen (aerobic oxidative strategy) as a clean and safe oxidant is liable for generous value addition. The further pertinence of the developed protocol has been demonstrated by transforming the synthesized cyanated product into numerous other functional groups, which will, undoubtedly, accomplish utilization in the synthetic area of biologically important compounds and medicinal chemistry.
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Affiliation(s)
- Richa Sharma
- Laboratory of Organic and Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India.,Laboratory of Bioactive Heterocycles and Catalysis, Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Bijnor-Sisendi Road, Near CRPF Base Camp, Sarojini Nagar, Lucknow 226002, India
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3
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Saini S, Kumar K, Saini P, Mahawar DK, Rathore KS, Kumar S, Dandia A, Parewa V. Sustainable synthesis of biomass-derived carbon quantum dots and their catalytic application for the assessment of α,β-unsaturated compounds. RSC Adv 2022; 12:32619-32629. [PMID: 36425689 PMCID: PMC9661692 DOI: 10.1039/d2ra05201f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/02/2022] [Indexed: 10/13/2023] Open
Abstract
Herein, we demonstrate a simple, reproducible, and environment-friendly strategy for the synthesis of carbon quantum dots (CQDs) utilizing the mango (Mangifera indica) kernel as a renewable green carbon source. Various analytical tools characterized the as-prepared CQDs. These fluorescent CQDs showed significant water solubility with a uniform size of about 6 nm. The as-synthesized CQDs show significantly enhanced catalytic activity for the production of α,β-unsaturated compounds from the derivatives of aromatic alkynes and aldehydes under microwave irradiation in aqueous media. A potential mechanistic pathway and role of carboxylic functionalities were also revealed via various control experiments. The protocol shows outstanding selectivity towards the assessment of α,β-unsaturated compounds over other possible products. A comparative evaluation suggested the as-synthesized CQDs show higher catalytic activity under microwave radiation as compared to the conventional ways. These recyclable CQDs represent a sustainable alternative to metals in synthetic organic chemistry. A cleaner reaction profile, low catalyst loading, economic viability and recyclability of the catalyst, atom economy, and comprehensive substrate applicability are additional benefits of the current protocol according to green chemistry.
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Affiliation(s)
- Surendra Saini
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan Jaipur India
| | - Krishan Kumar
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan Jaipur India
| | - Pratibha Saini
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan Jaipur India
- Friedrich Schiller Univ. Jena, Inst. Anorgan. & Analyt. Chem. Humboldt Str 8 D-07743 Jena Germany
| | - Dinesh Kumar Mahawar
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan Jaipur India
| | - Kuldeep S Rathore
- Department of Physics, Arya College of Engineering and IT Jaipur India
| | - Sanjay Kumar
- Department of Physics, University of Rajasthan Jaipur India
| | - Anshu Dandia
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan Jaipur India
| | - Vijay Parewa
- Centre of Advanced Studies, Department of Chemistry, University of Rajasthan Jaipur India
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4
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Yadav L, Shyamlal BRK, Tiwari MK, Rahaman T A A, Sen J, Chaudhary S. Unprecedented TMEDA-Catalyzed Regioselective Decarboalkoxy C-N Bond Formation: A Unified Direct Access to Indolo[2,1-a]isoquinoline and Dibenzopyrrocoline Alkaloids. Chem Asian J 2022; 17:e202200398. [PMID: 35615980 DOI: 10.1002/asia.202200398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/24/2022] [Indexed: 11/09/2022]
Abstract
An unprecedented TMEDA-catalyzed, regioselective, decarboethoxy direct C-N coupling protocol towards the synthesis of dibenzopyrocolines 17a - i and 5,6-dihydroindolo[2,1 a ]isoquinoline 15a - f / 18a-c alkaloids via the identification of N,N,N',N'-tetramethylethylenediamine ( TMEDA ) as a homogeneous catalyst is reported. The transition-metal-free, TMEDA-catalytic novel protocol is operationally simple and showed a wide range of functional group tolerance and substrate compatibility. The gram-scale application and synthesis of naturally occurring Cryptaustoline (dibenzopyrocoline) alkaloid, further highlights the importance and versatile nature of the developed protocol. This finding also offers a TMEDA-catalyzed direct synthesis of dibenzopyrocolines and substituted 5,6dihydroindolo[2,1 -a ]isoquinoline compounds in a one-pot. The probable reaction pathway involves the free-radical sequential approach via a single electron transfer (SET) mechanism.
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Affiliation(s)
- Lalit Yadav
- Malaviya National Institute of Technology, Chemistry, Jawaharlal Nehru Marg, 302017, Jaipur, INDIA
| | | | - Mohit Kumar Tiwari
- Malaviya National Institute of Technology, Chemistry, Jawaharlal Nehru Marg, 302017, Jaipur, INDIA
| | - Abdul Rahaman T A
- National Institute of Pharmaceutical Education and Research Raebareli, Department of Medicinal Chemsitry, NIPER-Raebareli, Transit Campus,, Ahmedpur-Kamplapur, Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, 226002, Lucknow, INDIA
| | - Janmejaya Sen
- National Institute of Pharmaceutical Education and Research Raebareli, Department of Medicinal Chemsitry, NIPER-Raebareli, Transit Campus,, Ahmedpur-Kamplapur, Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, 226002, Lucknow, INDIA
| | - Sandeep Chaudhary
- National Institute of Pharmaceutical Education and Research Raebareli, Department of Medicinal Chemistry, Transit Campus, Ahmedpur-Kamplapur, Bijnor-Sisendi Road, Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow, India, 226002, Lucknow, INDIA
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5
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Nagode SB, Kant R, Rastogi N. Hantzsch Ester-Mediated Synthesis of Phenanthridines under Visible-Light Irradiation. Chem Asian J 2020; 15:3513-3518. [PMID: 32935472 DOI: 10.1002/asia.202000888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/09/2020] [Indexed: 01/08/2023]
Abstract
An efficient photocatalytic synthesis of phenanthridines mediated by an organo-photoredox initiator Hantzsch ester has been developed via denitrogenative intramolecular annulation of benzotriazolyl chalcones. The highly reducing photoactivated Hantzsch ester facilitates the transformation of benzotriazolyl chalcones into phenanthridinyl chalcones through photoinduced electron transfer (PET) and hydrogen atom transfer (HAT) processes. The mild reaction conditions utilizing inexpensive Hantzsch ester as photosensitizer, wide reaction scope and excellent functional group tolerance are notable attributes of the methodology.
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Affiliation(s)
- Savita B Nagode
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sec. 10, JankipuramExtension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Ruchir Kant
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Sec. 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Namrata Rastogi
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sec. 10, JankipuramExtension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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Tiwari MK, Yadav L, Chaudhary S. [2,3‐Bis‐(2‐pyridyl) pyrazine] as an Efficient Organocatalyst for the Direct C
(sp
2
)
‐H Arylation of Unactivated Arenes/Heteroarenes
via
C−H Bond Activation. ChemistrySelect 2020. [DOI: 10.1002/slct.202003140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mohit K. Tiwari
- Laboratory of Organic and Medicinal Chemistry Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Lalit Yadav
- Laboratory of Organic and Medicinal Chemistry Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
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7
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Kant Yadav R, Kumar Y, Chaudhary S. Metal‐Free, H
2
O
2
‐Mediated, Regioselective Direct C‐3 Hydroxylation of Imidazo[1,2‐
a
]pyridines via C(sp
2
)‐H Bond Functionalization. ChemistrySelect 2020. [DOI: 10.1002/slct.202002219] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ravi Kant Yadav
- Laboratory of Organic and Medicinal Chemistry (OMC lab)Department of Chemistry Malaviya National Institute of Technology Jawaharlal Nehru Marg Jaipur 302017 India
| | - Yogesh Kumar
- Laboratory of Organic and Medicinal Chemistry (OMC lab)Department of Chemistry Malaviya National Institute of Technology Jawaharlal Nehru Marg Jaipur 302017 India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry (OMC lab)Department of Chemistry Malaviya National Institute of Technology Jawaharlal Nehru Marg Jaipur 302017 India
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8
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Yadav L, Tiwari MK, Shyamlal BRK, Chaudhary S. Organocatalyst in Direct C( sp2)-H Arylation of Unactivated Arenes: [1-(2-Hydroxyethyl)-piperazine]-Catalyzed Inter-/ Intra-molecular C-H Bond Activation. J Org Chem 2020; 85:8121-8141. [PMID: 32438807 DOI: 10.1021/acs.joc.0c01019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This article describes the identification of 1-(2-hydroxyethyl)-piperazine as a new, cost-effective, highly efficient organocatalyst, which promotes both inter- and intra-molecular direct C(sp2)-H arylations of unactivated arenes in the presence of potassium tert-butoxide. While the inter-molecular C-H arylation of unactivated benzenes with aryl halides (Ar-X; X = I, Br, Cl) toward biaryl syntheses underwent smoothly in the presence of only 10 mol % organocatalyst, the intra-molecular C-H arylation catalytic system composed of 40 mol % each of the catalyst and the additive (4-dimethylaminopyridine (DMAP)). The novel catalyst was also able to perform both inter- and intra-molecular direct arylations simultaneously in a single pot. The mechanistic studies confirmed the involvement of aryl radical anions and proceeded via a single-electron-transfer (SET) mechanism. The large substrate scope, high functional group tolerance, competition experiments, gram-scale synthesis, and kinetic studies further highlight the importance and versatile nature of the methodology as well as the compatibility of the new catalyst. To the best of our knowledge, this is the first report on any organocatalyst that reported detailed investigations of both inter- and intra-molecular direct C(sp2)-H arylations of unactivated arenes in a single representation.
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Affiliation(s)
- Lalit Yadav
- Laboratory of Organic and Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India
| | - Mohit K Tiwari
- Laboratory of Organic and Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India
| | - Bharti Rajesh Kumar Shyamlal
- Laboratory of Organic and Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry, Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur 302017, India
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