1
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Kumar R, Singh H, Mazumder A, Yadav RK. Synthetic Approaches, Biological Activities, and Structure-Activity Relationship of Pyrazolines and Related Derivatives. Top Curr Chem (Cham) 2023; 381:12. [PMID: 37029841 DOI: 10.1007/s41061-023-00422-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/22/2023] [Indexed: 04/09/2023]
Abstract
It has been established that pyrazolines and their analogs are pharmacologically active scaffolds. The pyrazoline moiety is present in several marketed molecules with a wide range of uses, which has established its importance in pharmaceutical and agricultural sectors, as well as in industry. Due to its broad-spectrum utility, scientists are continuously captivated by pyrazolines and their derivatives to study their chemistry. Pyrazolines or their analogs can be prepared by several synthesis strategies, and the focus will always be on new greener and more economical ways for their synthesis. Among these methods, chalcones, hydrazines, diazo compounds, and hydrazones are most commonly applied under different reaction conditions for the synthesis of pyrazoline and its analogs. However, there is scope for other molecules such as Huisgen zwitterions, different metal catalysts, and nitrile imine to be used as starting reagents. The present article consists of recently reported synthetic protocols, pharmacological activities, and the structure-activity relationship of pyrazoline and its derivatives, which will be very useful to researchers.
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Affiliation(s)
- Rajnish Kumar
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India.
| | - Himanshu Singh
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Avijit Mazumder
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Ranjeet Kumar Yadav
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
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2
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Prakash M, Halder S, Guin S, Samanta S. Swapping Copper-Catalytic Process: Selective Access to Pyrazoles and Conjugated Ketimines from Oxime Acetates and Cyclic Sulfamidate Imines. Chem Asian J 2023; 18:e202201114. [PMID: 36583485 DOI: 10.1002/asia.202201114] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/16/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022]
Abstract
A powerful CuCl-catalyzed sequential one-pot reaction of aryl methyl ketoxime acetates with cyclic N-sulfonyl imines followed by elimination in the presence of base is reported. This hydrazine-free method conveniently makes C-C and N-N bonds via a radical cleavage of the N-O bond, delivering a special class of C3-hydroxyarylated pyrazoles in good yields. Surprisingly, while employing CuI as a catalyst instead of CuCl, the reaction proceeds through a non-radical pathway which embodies a new tactic for the high-yielding access to value-added conjugated N-unsubstituted ketimines. Moreover, additive-free approach to sulfamidate-fused-pyrazoles was achieved by successfully catalyzing addition and oxidative N-N bond-making reactions by CuI and CuCl, respectively. Significantly, our novel technique could convert the prepared ketimines into the pharmacologically recognized 6H-benzo[c]chromene frameworks.
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Affiliation(s)
- Meher Prakash
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Sajal Halder
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Soumitra Guin
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
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3
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Lathrop SP, Mlinar LB, Manjrekar ON, Zhou Y, Harper KC, Sacia ER, Higgins M, Bogdan AR, Wang Z, Richter SM, Gong W, Voight EA, Henle J, Diwan M, Kallemeyn JM, Sharland JC, Wei B, Davies HML. Continuous Process to Safely Manufacture an Aryldiazoacetate and Its Direct Use in a Dirhodium-Catalyzed Enantioselective Cyclopropanation. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Stephen P. Lathrop
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Laurie B. Mlinar
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Onkar N. Manjrekar
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Yong Zhou
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Kaid C. Harper
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Eric R. Sacia
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Molly Higgins
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Andrew R. Bogdan
- Advanced Chemistry Technologies, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Zhe Wang
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Steven M. Richter
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Wei Gong
- Drug Discovery Science & Technology, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Eric A. Voight
- Drug Discovery Science & Technology, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Jeremy Henle
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Moiz Diwan
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Jeffrey M. Kallemeyn
- Process Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
| | - Jack C. Sharland
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Bo Wei
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Huw M. L. Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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4
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Dwari S, Nath PP, Jana CK. Ring Opening of Pyrrolinium Ions Enabled Regioselective Synthesis of 4-Alkyl N-Arylpyrazoles. J Org Chem 2022; 87:11947-11957. [PMID: 36069722 DOI: 10.1021/acs.joc.2c00727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unprecedented method for the regioselective synthesis of 1,3-diaryl 4-alkyl pyrazoles has been reported. A wide variety of 1,3-diaryl 4-alkyl pyrazoles were synthesized as a single regioisomer via a ring-opening cyclization reaction of unsaturated pyrrolinium ions in the presence of arylhydrazines. This method avoids using additional alkylation steps and hazardous oxidants that generally are essential for the synthesis of 4-alkyl N-arylpyrazoles.
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Affiliation(s)
- Soumita Dwari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Partha Partim Nath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Chandan K Jana
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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5
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Yang WF, Shu T, Chen HR, Qin HL, Tang H. A cascade reaction for regioselective construction of pyrazole-containing aliphatic sulfonyl fluorides. Org Biomol Chem 2022; 20:3506-3510. [PMID: 35420611 DOI: 10.1039/d2ob00515h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A copper-catalyzed cascade reaction of α-diazocarbonyl compounds with ethenesulfonyl fluoride (ESF) is developed, affording a variety of highly functionalized pyrazolyl aliphatic sulfonyl fluorides in good to excellent yields (66-98%). This transformation features broad substrates, exclusive regioselectivity, high atom economy and operational simplicity, thus providing a straightforward method for the direct construction of pyrazole-containing aliphatic sulfonyl fluorides, which will provide great applicable value in medicinal chemistry and other related disciplines.
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Affiliation(s)
- Wen-Fei Yang
- School of Chemistry, Chemical Engineering and Life Sciences; and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
| | - Tao Shu
- School of Chemistry, Chemical Engineering and Life Sciences; and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
| | - Hong-Ru Chen
- School of Chemistry, Chemical Engineering and Life Sciences; and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
| | - Hua-Li Qin
- School of Chemistry, Chemical Engineering and Life Sciences; and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
| | - Haolin Tang
- School of Chemistry, Chemical Engineering and Life Sciences; and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
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6
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Chandrasekharan SP, Dhami A, Kumar S, Mohanan K. Recent advances in pyrazole synthesis employing diazo compounds and synthetic analogues. Org Biomol Chem 2022; 20:8787-8817. [DOI: 10.1039/d2ob01918c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review summarizes the recent developments in the construction of pyrazoles using diazo compounds, nitrile imines and their synthetic equivalents.
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Affiliation(s)
- Sanoop P. Chandrasekharan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Anamika Dhami
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Sandeep Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research, Ghaziabad-201002, India
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7
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Dasgupta A, Babaahmadi R, Pahar S, Stefkova K, Gierlichs L, Yates BF, Ariafard A, Melen RL. Tris(pentafluorphenyl)boran‐katalysierte Erzeugung von Carbenium‐Ionen und autokatalytische Pyrazol‐Synthese – eine theoretische und experimentelle Studie. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Rasool Babaahmadi
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australien
| | - Sanjukta Pahar
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Katarina Stefkova
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Lukas Gierlichs
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
| | - Brian F. Yates
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australien
| | - Alireza Ariafard
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australien
| | - Rebecca L. Melen
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT Cymru/Wales Großbritannien
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8
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Dasgupta A, Babaahmadi R, Pahar S, Stefkova K, Gierlichs L, Yates BF, Ariafard A, Melen RL. Tris(pentafluorophenyl)borane-Catalyzed Carbenium Ion Generation and Autocatalytic Pyrazole Synthesis-A Computational and Experimental Study. Angew Chem Int Ed Engl 2021; 60:24395-24399. [PMID: 34590773 PMCID: PMC8596400 DOI: 10.1002/anie.202109744] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/16/2021] [Indexed: 12/11/2022]
Abstract
In recent years, metal-free organic synthesis using triarylboranes as catalysts has become a prevalent research area. Herein we report a comprehensive computational and experimental study for the highly selective synthesis of N-substituted pyrazoles through the generation of carbenium species from the reaction between aryl esters and vinyl diazoacetates in the presence of catalytic tris(pentafluorophenyl)borane [B(C6 F5 )3 ]. DFT studies were undertaken to illuminate the reaction mechanism revealing that the in situ generation of a carbenium species acts as an autocatalyst to prompt the regiospecific formation of N-substituted pyrazoles in good to excellent yields (up to 81 %).
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Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Rasool Babaahmadi
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Sanjukta Pahar
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Katarina Stefkova
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Lukas Gierlichs
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Brian F. Yates
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Alireza Ariafard
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Rebecca L. Melen
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
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9
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Ramadan M, Aly AA, El-Haleem LEA, Alshammari MB, Bräse S. Substituted Pyrazoles and Their Heteroannulated Analogs-Recent Syntheses and Biological Activities. Molecules 2021; 26:4995. [PMID: 34443583 PMCID: PMC8401439 DOI: 10.3390/molecules26164995] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 02/06/2023] Open
Abstract
Pyrazoles are considered privileged scaffolds in medicinal chemistry. Previous reviews have discussed the importance of pyrazoles and their biological activities; however, few have dealt with the chemistry and the biology of heteroannulated derivatives. Therefore, we focused our attention on recent topics, up until 2020, for the synthesis of pyrazoles, their heteroannulated derivatives, and their applications as biologically active moieties. Moreover, we focused on traditional procedures used in the synthesis of pyrazoles.
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Affiliation(s)
- Mohamed Ramadan
- Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assuit 71524, Egypt;
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt;
| | | | - Mohammed B. Alshammari
- Chemistry Department, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 83, Al-Kharij 11942, Saudi Arabia;
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
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10
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11
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Budeev A, Kantin G, Dar’in D, Krasavin M. Diazocarbonyl and Related Compounds in the Synthesis of Azoles. Molecules 2021; 26:2530. [PMID: 33926128 PMCID: PMC8123665 DOI: 10.3390/molecules26092530] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 12/15/2022] Open
Abstract
Diazocarbonyl compounds have found numerous applications in many areas of chemistry. Among the most developed fields of diazo chemistry is the preparation of azoles from diazo compounds. This approach represents a useful alternative to more conventional methods of the synthesis of azoles. A comprehensive review on the preparation of various azoles (oxazoles, thiazoles, imidazoles, pyrazoles, triazoles, and tetrazoles) from diazocarbonyl and related compounds is presented for the first time along with discussion of advantages and disadvantages of «diazo» approaches to azoles.
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Affiliation(s)
| | | | - Dmitry Dar’in
- Institute of Chemistry, St. Petersburg State University, 198504 Peterhof, Russia; (A.B.); (G.K.)
| | - Mikhail Krasavin
- Institute of Chemistry, St. Petersburg State University, 198504 Peterhof, Russia; (A.B.); (G.K.)
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12
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Meng X, Yang M, Peng J, Zhao Y. Silver‐Catalyzed Three‐Component Coupling Reaction of Amines, 2‐Isocyanobenzaldehydes, and 2,2,2‐Trifluorodiazoethane and Synthesis of Trifluoromethyl‐Substituted Indolo[1,2‐
c
]quinazolines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xiang‐He Meng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Faculty of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
| | - Ming Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Faculty of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
| | - Ju‐Yin Peng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Faculty of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
| | - Yu‐Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Faculty of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
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13
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Green S, Wheelhouse KM, Payne AD, Hallett JP, Miller PW, Bull JA. Thermal Stability and Explosive Hazard Assessment of Diazo Compounds and Diazo Transfer Reagents. Org Process Res Dev 2020; 24:67-84. [PMID: 31983869 PMCID: PMC6972035 DOI: 10.1021/acs.oprd.9b00422] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 11/29/2022]
Abstract
Despite their wide use in academia as metal-carbene precursors, diazo compounds are often avoided in industry owing to concerns over their instability, exothermic decomposition, and potential explosive behavior. The stability of sulfonyl azides and other diazo transfer reagents is relatively well understood, but there is little reliable data available for diazo compounds. This work first collates available sensitivity and thermal analysis data for diazo transfer reagents and diazo compounds to act as an accessible reference resource. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and accelerating rate calorimetry (ARC) data for the model donor/acceptor diazo compound ethyl (phenyl)diazoacetate are presented. We also present a rigorous DSC dataset with 43 other diazo compounds, enabling direct comparison to other energetic materials to provide a clear reference work to the academic and industrial chemistry communities. Interestingly, there is a wide range of onset temperatures (T onset) for this series of compounds, which varied between 75 and 160 °C. The thermal stability variation depends on the electronic effect of substituents and the amount of charge delocalization. A statistical model is demonstrated to predict the thermal stability of differently substituted phenyl diazoacetates. A maximum recommended process temperature (T D24) to avoid decomposition is estimated for selected diazo compounds. The average enthalpy of decomposition (ΔH D) for diazo compounds without other energetic functional groups is -102 kJ mol-1. Several diazo transfer reagents are analyzed using the same DSC protocol and found to have higher thermal stability, which is in general agreement with the reported values. For sulfonyl azide reagents, an average ΔH D of -201 kJ mol-1 is observed. High-quality thermal data from ARC experiments shows the initiation of decomposition for ethyl (phenyl)diazoacetate to be 60 °C, compared to that of 100 °C for the common diazo transfer reagent p-acetamidobenzenesulfonyl azide (p-ABSA). The Yoshida correlation is applied to DSC data for each diazo compound to provide an indication of both their impact sensitivity (IS) and explosivity. As a neat substance, none of the diazo compounds tested are predicted to be explosive, but many (particularly donor/acceptor diazo compounds) are predicted to be impact-sensitive. It is therefore recommended that manipulation, agitation, and other processing of neat diazo compounds are conducted with due care to avoid impacts, particularly in large quantities. The full dataset is presented to inform chemists of the nature and magnitude of hazards when using diazo compounds and diazo transfer reagents. Given the demonstrated potential for rapid heat generation and gas evolution, adequate temperature control and cautious addition of reagents that begin a reaction are strongly recommended when conducting reactions with diazo compounds.
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Affiliation(s)
- Sebastian
P. Green
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 80 Wood Lane, London W12 0BZ, U.K.
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, Exhibition Road, London SW7 2AZ, U.K.
| | - Katherine M. Wheelhouse
- API Chemistry, Product Development & Supply and Process Safety,
Pilot Plant Operations, GlaxoSmithKline,
GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.
| | - Andrew D. Payne
- API Chemistry, Product Development & Supply and Process Safety,
Pilot Plant Operations, GlaxoSmithKline,
GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.
| | - Jason P. Hallett
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, Exhibition Road, London SW7 2AZ, U.K.
| | - Philip W. Miller
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 80 Wood Lane, London W12 0BZ, U.K.
| | - James A. Bull
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 80 Wood Lane, London W12 0BZ, U.K.
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14
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Dai T, Li Q, Zhang X, Yang C. Substituent-Oriented Synthesis of Substituted Pyrazoles/Chromeno[3,2-c]pyrazoles via Sequential Reactions of Chromones/3-Chlorochromones and Tosylhydrazones. J Org Chem 2019; 84:5913-5921. [DOI: 10.1021/acs.joc.9b00282] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Tianzi Dai
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
- School of Pharmacy, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Qunyi Li
- Department of Pharmacy, Huashan Hospital North, Fudan University, 108 Luxiang Road, Shanghai 201907, China
| | - Xiaofei Zhang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
- School of Pharmacy, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Chunhao Yang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
- School of Pharmacy, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
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15
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Mi P, Lang J, Lin S. Retracted Article: Molybdenum-silver co-catalyzed cycloaddition of alkynes with N-isocyanoiminotriphenylphosphorane (NIITP): an efficient strategy for the synthesis of monosubstituted pyrazoles. Chem Commun (Camb) 2019; 55:7986-7989. [DOI: 10.1039/c9cc03363g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A highly efficient synthesis of monosubstituted pyrazoles from alkynes and N-isocyanoiminotriphenylphosphorane (NITTP) is developed via molybdenum-silver co-catalyzed [3+2] cycloaddition.
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Affiliation(s)
- Pengbing Mi
- College of Light Industry and Textile and Food Engineering
- Sichuan University
- Chengdu 610065
- China
- Institute of Fundamental and Frontier Sciences
| | - Jiajia Lang
- Research Center for Medicine
- University of South China
- Hengyang 421001
- China
| | - Shaojian Lin
- College of Light Industry and Textile and Food Engineering
- Sichuan University
- Chengdu 610065
- China
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16
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Janot C, Palamini P, Dobson BC, Muir J, Aïssa C. Palladium-Catalyzed Synthesis of Bis-Substituted Sulfoxonium Ylides. Org Lett 2018; 21:296-299. [DOI: 10.1021/acs.orglett.8b03744] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher Janot
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
| | - Pierre Palamini
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
| | - Benjamin C. Dobson
- Pharmaceutical Technology and Development, AstraZeneca R&D, Silk Road Business Park, Charter Way, Macclesfield, Cheshire SK10 2NA, United Kingdom
| | - James Muir
- Pharmaceutical Technology and Development, AstraZeneca R&D, Silk Road Business Park, Charter Way, Macclesfield, Cheshire SK10 2NA, United Kingdom
| | - Christophe Aïssa
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
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17
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El Arba M, Dibrell SE, Meece F, Frantz DE. Ru(II)-Catalyzed Synthesis of Substituted Furans and Their Conversion to Butenolides. Org Lett 2018; 20:5886-5888. [DOI: 10.1021/acs.orglett.8b02554] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Marie El Arba
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Sara E. Dibrell
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Frederick Meece
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Doug E. Frantz
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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18
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Nair D, Pavashe P, Namboothiri IN. 1,3-Dipolar cycloaddition of chalcones and arylidene-1,3-dicarbonyls with diazosulfone for the regioselective synthesis of functionalized pyrazoles and pyrazolines. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Synthesis of fully substituted pyrazoles via regioselective 1,3-dipolar cycloaddition reaction. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1323-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Brown AW. Recent Developments in the Chemistry of Pyrazoles. ADVANCES IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1016/bs.aihch.2018.02.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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21
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Sharghi H, Aboonajmi J, Mozaffari M, Doroodmand MM, Aberi M. Application and developing of iron‐doped multi‐walled carbon nanotubes (Fe/MWCNTs) as an efficient and reusable heterogeneous nanocatalyst in the synthesis of heterocyclic compounds. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4124] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hashem Sharghi
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
| | - Jasem Aboonajmi
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
| | - Mozhdeh Mozaffari
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
| | | | - Mahdi Aberi
- Department of Chemistry, College of SciencesShiraz University Shiraz 71454 Iran
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22
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Tian M, Shi X, Zhang X, Fan X. Synthesis of 4-Acylpyrazoles from Saturated Ketones and Hydrazones Featured with Multiple C(sp3)–H Bond Functionalization and C–C Bond Cleavage and Reorganization. J Org Chem 2017. [DOI: 10.1021/acs.joc.7b01013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miaomiao Tian
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xiaonan Shi
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinying Zhang
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Henan Key Laboratory of Organic
Functional Molecule and Drug Innovation, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
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23
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Fu L, Mighion JD, Voight EA, Davies HML. Synthesis of 2,2,2,-Trichloroethyl Aryl- and Vinyldiazoacetates by Palladium-Catalyzed Cross-Coupling. Chemistry 2017; 23:3272-3275. [PMID: 28093820 DOI: 10.1002/chem.201700101] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Indexed: 11/11/2022]
Abstract
An efficient and convenient synthesis of 2,2,2-trichloroethyl (TCE) aryl- and vinyldiazoacetates was achieved by palladium-catalyzed cross-coupling reactions between TCE diazoacetates and aryl or vinyl iodides. The broad substrate scope allows for rapid and facile formation of TCE aryl- and vinyldiazoacetates, which recently have emerged as versatile reagents for rhodium-carbene chemistry.
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Affiliation(s)
- Liangbing Fu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia, 30322, USA
| | - Jeffrey D Mighion
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia, 30322, USA
| | - Eric A Voight
- Research & Development, AbbVie, 1 North Waukegan Road, North Chicago, Illinois, 60064, USA
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia, 30322, USA
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24
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Su X, Huang H, Yuan Y, Li Y. Radical Desulfur‐Fragmentation and Reconstruction of Enol Triflates: Facile Access to α‐Trifluoromethyl Ketones. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608507] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xiaolong Su
- Department of Chemistry Fuzhou University Fuzhou 350116 China
| | - Honggui Huang
- Department of Chemistry Fuzhou University Fuzhou 350116 China
| | - Yaofeng Yuan
- Department of Chemistry Fuzhou University Fuzhou 350116 China
| | - Yi Li
- Department of Chemistry Fuzhou University Fuzhou 350116 China
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25
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Su X, Huang H, Yuan Y, Li Y. Radical Desulfur‐Fragmentation and Reconstruction of Enol Triflates: Facile Access to α‐Trifluoromethyl Ketones. Angew Chem Int Ed Engl 2016; 56:1338-1341. [DOI: 10.1002/anie.201608507] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaolong Su
- Department of Chemistry Fuzhou University Fuzhou 350116 China
| | - Honggui Huang
- Department of Chemistry Fuzhou University Fuzhou 350116 China
| | - Yaofeng Yuan
- Department of Chemistry Fuzhou University Fuzhou 350116 China
| | - Yi Li
- Department of Chemistry Fuzhou University Fuzhou 350116 China
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26
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Bakanas IJ, Moura-Letts G. Synthesis of Tetrasubstituted Pyrazoles from Substituted Hydrazines and β-Keto Esters. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601093] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ian J. Bakanas
- Department of Chemistry and Biochemistry; Rowan University; 201 Mullica Hill Rd. Glassboro New Jersey USA
| | - Gustavo Moura-Letts
- Department of Chemistry and Biochemistry; Rowan University; 201 Mullica Hill Rd. Glassboro New Jersey USA
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27
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Munteanu C, Frantz DE. Palladium-Catalyzed Synthesis of Alkynes via a Tandem Decarboxylation/Elimination of (E)-Enol Triflates. Org Lett 2016; 18:3937-9. [PMID: 27456435 DOI: 10.1021/acs.orglett.6b01904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild catalytic synthesis of alkynes via a tandem Pd-catalyzed decarboxylation/elimination of enol triflates is described. Key attributes of the method include readily available starting materials, broad functional group tolerance, and the ability to access terminal, internal, and halogenated alkynes. The preliminary scope of the reaction is demonstrated on 25 different examples with yields ranging from 63% to 96%.
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Affiliation(s)
- Charissa Munteanu
- Department of Chemistry, The University of Texas at San Antonio , One UTSA Circle, San Antonio, Texas 78249, United States
| | - Doug E Frantz
- Department of Chemistry, The University of Texas at San Antonio , One UTSA Circle, San Antonio, Texas 78249, United States
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28
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Deng Y, Jing C, Doyle MP. Dinitrogen extrusion from enoldiazo compounds under thermal conditions: synthesis of donor-acceptor cyclopropenes. Chem Commun (Camb) 2016; 51:12924-7. [PMID: 26186132 DOI: 10.1039/c5cc05006e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Donor-acceptor cyclopropenes are formed quantitatively or in high yield from enoldiazoacetates and enoldiazoacetamides under moderate thermal conditions. They are more versatile than their corresponding enoldiazocarbonyl compounds as carbene precursors.
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Affiliation(s)
- Yongming Deng
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, USA.
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29
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Aly AA, Hassan AA, Bräse S, Gomaa MAM, Nemr FM. Reaction of Amidrazones with Diaminomaleonitrile: Synthesis of 4-Amino-5-Iminopyrazoles. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2607] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ashraf A. Aly
- Department of Chemistry, Faculty of Science; Minia University; 61519 El-Minia Egypt
| | - Alaa A. Hassan
- Department of Chemistry, Faculty of Science; Minia University; 61519 El-Minia Egypt
| | - Stefan Bräse
- Institute of Organic Chemistry; Karlsruhe Institute of Technology; 76141 Karlsruhe Germany
| | - Mohsen A.-M. Gomaa
- Department of Chemistry, Faculty of Science; Minia University; 61519 El-Minia Egypt
| | - Fatmaa M. Nemr
- Department of Chemistry, Faculty of Science; Minia University; 61519 El-Minia Egypt
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30
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Deng G, Wang F, Lu S, Cheng B. Synthesis of Pyrano[3,2-c]pyrazol-7(1H)-one Derivatives by Tandem Cyclization of 2-Diazo-3,5-dioxo-6-ynoates (Ynones). Org Lett 2016; 17:4651-3. [PMID: 26371503 DOI: 10.1021/acs.orglett.5b02369] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The construct of the core of pyrano[3,2-c]pyrazol-7(1H)-one derivatives is realized. The key step includes a tandem cyclization, namely, a metal-free cascade 6-π electrocyclic ring closure-Michael reaction of 2-diazo-3,5-dioxo-6-ynoates (ynones). The cascade reaction cleanly generated the desired products in excellent yields under mild conditions.
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Affiliation(s)
- Guisheng Deng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University , Changsha 410081, China
| | - Feng Wang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University , Changsha 410081, China
| | - Shengle Lu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University , Changsha 410081, China
| | - Bo Cheng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University , Changsha 410081, China
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31
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Kashiwa M, Kuwata Y, Sonoda M, Tanimori S. Oxone-mediated facile access to substituted pyrazoles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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32
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Shao Y, Tong J, Zhao Y, Zheng H, Ma L, Ma M, Wan X. [3 + 2] cycloaddition and subsequent oxidative dehydrogenation between alkenes and diazo compounds: a simple and direct approach to pyrazoles using TBAI/TBHP. Org Biomol Chem 2016; 14:8486-92. [DOI: 10.1039/c6ob01522k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, an efficient [3 + 2] cycloaddition and oxidative dehydrogenation reaction of diazo compounds and alkenes was well developed using TBAI/TBHP, leading to pyrazoles with moderate to high yields.
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Affiliation(s)
- Ying Shao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jingjing Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Yanwei Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Hao Zheng
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Liang Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Meihua Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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33
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Pünner F, Sohtome Y, Sodeoka M. Solvent-dependent copper-catalyzed synthesis of pyrazoles under aerobic conditions. Chem Commun (Camb) 2016; 52:14093-14096. [DOI: 10.1039/c6cc06935e] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a copper-catalyzed oxidative cyclization of hydrazones under aerobic conditions, enabling solvent-dependent selective synthesis of different pyrazoles.
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Affiliation(s)
- Florian Pünner
- Synthetic Organic Chemistry Laboratory
- Saitama 351-0198
- Japan
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
| | - Yoshihiro Sohtome
- Synthetic Organic Chemistry Laboratory
- Saitama 351-0198
- Japan
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory
- Saitama 351-0198
- Japan
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
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34
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Gill A, Werz UR, Maas G. N-vinylation and N-allylation of 3,5-disubstituted pyrazoles by N–H insertion of vinylcarbenoids. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2015. [DOI: 10.1515/znb-2015-0115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A vinylcarbenoid approach toward N-functionalization of NH-pyrazoles is presented. The rhodium(II)-catalyzed reaction of methyl styryl-diazoacetate (1) or dimethyl 2-diazoglutaconate (3) with 3,5-disubstituted pyrazoles gave products of carbenoid N–H insertion in high combined yields, although regioselectivity issues posed by the pyrazole or the vinylcarbenoid moiety as well as positional and configurational isomerism concerning the C,C double bond of the latter led to product mixtures. The ambident reactivity of the vinylcarbenoid derived from 1 could be steered by the catalyst: while Rh2(OAc)4 yielded products of direct carbenoid insertion preferentially, silver(I) catalysis strongly favored reaction at the vinylogous site of the carbenoid resulting in an N-allylation of the pyrazoles.
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Affiliation(s)
- Agagia Gill
- Institute of Organic Chemistry I, University of Ulm, 89081 Ulm, Germany
| | - Udo R. Werz
- Institute of Organic Chemistry I, University of Ulm, 89081 Ulm, Germany
| | - Gerhard Maas
- Institute of Organic Chemistry I, University of Ulm, 89081 Ulm, Germany
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35
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Shokova EA, Kim JK, Kovalev VV. 1,3-Diketones. Synthesis and properties. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2015. [DOI: 10.1134/s1070428015060019] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Kamal A, Sastry KNV, Chandrasekhar D, Mani GS, Adiyala PR, Nanubolu JB, Singarapu KK, Maurya RA. One-Pot, Three-Component Approach to the Synthesis of 3,4,5-Trisubstituted Pyrazoles. J Org Chem 2015; 80:4325-35. [DOI: 10.1021/jo502946g] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Ahmed Kamal
- Division
of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Department
of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Hyderabad 500037, India
| | - K. N. Visweswara Sastry
- Division
of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Department
of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Hyderabad 500037, India
| | - D. Chandrasekhar
- Division
of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Geeta Sai Mani
- Division
of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Department
of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Hyderabad 500037, India
| | - Praveen Reddy Adiyala
- Division
of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Jagadeesh Babu Nanubolu
- Centre
for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Kiran Kumar Singarapu
- Centre
for Nuclear Magnetic Resonance, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Ram Awatar Maurya
- Division
of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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37
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Ye F, Qu S, Zhou L, Peng C, Wang C, Cheng J, Hossain ML, Liu Y, Zhang Y, Wang ZX, Wang J. Palladium-catalyzed C-H functionalization of acyldiazomethane and tandem cross-coupling reactions. J Am Chem Soc 2015; 137:4435-44. [PMID: 25794590 DOI: 10.1021/ja513275c] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Palladium-catalyzed C-H functionalization of acyldiazomethanes with aryl iodides has been developed. This reaction is featured by the retention of the diazo functionality in the transformation, thus constituting a novel method for the introduction of diazo functionality to organic molecules. Consistent with the experimental results, the density functional theory (DFT) calculation indicates that the formation of Pd-carbene species in the catalytic cycle through dinitrogen extrusion from the palladium ethyl diazoacetate (Pd-EDA) complex is less favorable. The reaction instead proceeds through Ag2CO3 assisted deprotonation and subsequently reductive elimination to afford the products with diazo functionality remained. This C-H functionalization transformation can be further combined with the recently evolved palladium-catalyzed cross-coupling reaction of diazo compounds with aryl iodides to develop a tandem coupling process for the synthesis of α,α-diaryl esters. DFT calculation supports the involvement of Pd-carbene as reactive intermediate in the catalytic cycle, which goes through facile carbene migratory insertion with a low energy barrier (3.8 kcal/mol).
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Affiliation(s)
- Fei Ye
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Shuanglin Qu
- ‡School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Zhou
- §School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Cheng Peng
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Chengpeng Wang
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Jiajia Cheng
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Mohammad Lokman Hossain
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Yizhou Liu
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Yan Zhang
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
| | - Zhi-Xiang Wang
- ‡School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianbo Wang
- †Beijing National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871 China
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38
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Saini V, O'Dair M, Sigman MS. Synthesis of highly functionalized tri- and tetrasubstituted alkenes via Pd-catalyzed 1,2-hydrovinylation of terminal 1,3-dienes. J Am Chem Soc 2015; 137:608-11. [PMID: 25555197 PMCID: PMC4308737 DOI: 10.1021/ja511640g] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
![]()
An
efficient method for the construction of Csp2–Csp3 bond in a regio- and stereoselective fashion involving 1,3-terminal
dienes, enol triflates/nonaflates, and sodium formate under Pd(0)-catalysis
is described. The three component assembly allows trapping of a π-allyl
intermediate, after the initial migratory insertion of the diene,
by a hydride source that leads to structurally complex and synthetically
challenging tri- and tetrasubstituted alkene building blocks.
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Affiliation(s)
- Vaneet Saini
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112-0085, United States
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39
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Ding Z, Tan Q, Gao M, Xu B. Copper-catalyzed aerobic cascade cycloamination and acyloxylation: a direct approach to 4-acyloxy-1H-pyrazoles. Org Biomol Chem 2015; 13:4642-6. [DOI: 10.1039/c5ob00409h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient copper-catalyzed regioselective olefinic C(sp2)–H bond cycloamination and acyloxylation was developed to give acyloxylated pyrazoles under mild conditions, which combines the formation of the pyrazole skeleton and installation of an acyloxyl group in a single step.
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Affiliation(s)
- Zhengwei Ding
- Department of Chemistry
- Innovative Drug Research Center
- Shanghai University
- Shanghai 200444
- China
| | - Qitao Tan
- Department of Chemistry
- Innovative Drug Research Center
- Shanghai University
- Shanghai 200444
- China
| | - Mingchun Gao
- Department of Chemistry
- Innovative Drug Research Center
- Shanghai University
- Shanghai 200444
- China
| | - Bin Xu
- Department of Chemistry
- Innovative Drug Research Center
- Shanghai University
- Shanghai 200444
- China
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40
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Ye F, Wang C, Zhang Y, Wang J. Synthesis of Aryldiazoacetates through Palladium(0)-Catalyzed Deacylative Cross-Coupling of Aryl Iodides with Acyldiazoacetates. Angew Chem Int Ed Engl 2014; 53:11625-8. [DOI: 10.1002/anie.201407653] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Indexed: 11/06/2022]
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41
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Ye F, Wang C, Zhang Y, Wang J. Synthesis of Aryldiazoacetates through Palladium(0)-Catalyzed Deacylative Cross-Coupling of Aryl Iodides with Acyldiazoacetates. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407653] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Gladow D, Doniz-Kettenmann S, Reissig HU. 1,3-Dipolar Cycloadditions of Ethyl 2-Diazo-3,3,3-trifluoropropanoate to Alkynes and [1,5] Sigmatropic Rearrangements of the Resulting 3H-Pyrazoles: Synthesis of Mono-, Bis- and Tris(trifluoromethyl)-Substituted Pyrazoles. Helv Chim Acta 2014. [DOI: 10.1002/hlca.201400032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Raghunadh A, Meruva SB, Mekala R, Raghavendra Rao K, Krishna T, Gangadhara Chary R, Vaikunta Rao L, Syam Kumar U. An efficient regioselective copper catalyzed multi-component synthesis of 1,3-disubstituted pyrazoles. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.125] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Total syntheses of (-)-pyrimidoblamic acid and P-3A are disclosed. Central to the convergent approach is a powerful inverse electron demand Diels-Alder reaction between substituted electron-deficient 1,2,3-triazines and a highly functionalized and chiral primary amidine, which forms the pyrimidine cores and introduces all necessary stereochemistry in a single step. Intrinsic in the convergent approach is the potential it provides for the late stage divergent synthesis of modified analogs bearing deep-seated changes in either the pyrimidine cores or the highly functionalized C2 side chain common to both natural products. The examination of the key cycloaddition reaction revealed that the inherent 1,2,3-triazine mode of cycloaddition (C4/N1 vs C5/N2) as well as the amidine regioselectivity were unaffected by introduction of two electron-withdrawing groups (-CO2R) at C4 and C6 of the 1,2,3-triazine even if C5 is unsubstituted (Me or H), highlighting the synthetic potential of the powerful pyrimidine synthesis.
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Affiliation(s)
- Adam S Duerfeldt
- Department of Chemistry and the Skaggs Institute for Chemical Biology, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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Alizadeh A, Reza Esmaili zand H, Saberi V, Mokhtari J. Synthesis of 5-Aryl-3-(methylsulfanyl)-1H-pyrazolesviaThree-Component Reaction of 1,1-Bis(methylsulfanyl)-2-nitroethene, Aromatic Aldehydes, and Hydrazine. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201300070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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46
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Pérez-Aguilar MC, Valdés C. Regioselective One-Step Synthesis of Pyrazoles from Alkynes and N-Tosylhydrazones: [3+2] Dipolar Cycloaddition/[1,5] Sigmatropic Rearrangement Cascade. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301284] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Pérez-Aguilar MC, Valdés C. Regioselective one-step synthesis of pyrazoles from alkynes and N-tosylhydrazones: [3+2] dipolar cycloaddition/[1,5] sigmatropic rearrangement cascade. Angew Chem Int Ed Engl 2013; 52:7219-23. [PMID: 23740890 DOI: 10.1002/anie.201301284] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 03/22/2013] [Indexed: 11/09/2022]
Affiliation(s)
- M Carmen Pérez-Aguilar
- Instituto Universitario de Química Organometálica Enrique Moles, Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain
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Wang H, Zhao YL, Li L, Zhang ZW, Liu Q. Bicyclization of Diazomethanes: A Synthetic Strategy for Fused Pyrazoles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201062] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gulevich AV, Dudnik AS, Chernyak N, Gevorgyan V. Transition metal-mediated synthesis of monocyclic aromatic heterocycles. Chem Rev 2013; 113:3084-213. [PMID: 23305185 PMCID: PMC3650130 DOI: 10.1021/cr300333u] [Citation(s) in RCA: 814] [Impact Index Per Article: 74.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Anton V. Gulevich
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
| | - Alexander S. Dudnik
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
| | - Natalia Chernyak
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, 4500 SES, M/C 111, Chicago, Illinois 60607-7061
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Kumar SV, Yadav SK, Raghava B, Saraiah B, Ila H, Rangappa KS, Hazra A. Cyclocondensation of arylhydrazines with 1,3-bis(het)arylmonothio-1,3-diketones and 1,3-bis(het)aryl-3-(methylthio)-2-propenones: synthesis of 1-aryl-3,5-bis(het)arylpyrazoles with complementary regioselectivity. J Org Chem 2013; 78:4960-73. [PMID: 23607788 DOI: 10.1021/jo400599e] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Two efficient highly regioselective routes for the synthesis of unsymmetrically substituted 1-aryl-3,5-bis(het)arylpyrazoles with complementary regioselectivity starting from active methylene ketones have been reported. In the first protocol, the newly synthesized 1,3-bis(het)aryl-monothio-1,3-diketone precursors (prepared by condensation of active methylene ketones with het(aryl) dithioesters in the presence of sodium hydride) were reacted with arylhydrazines in refluxing ethanol under neutral conditions, furnishing 1-aryl-3,5-bis(het)arylpyrazoles 7, in which the het(aryl) moiety attached to the thiocarbonyl group of monothio-1,3-diketones is installed at the 3-position. In the second method, the corresponding 3-(methylthio)-1,3-bis(het)aryl-2-propenones (prepared in situ by base-induced alkylation of 1,3-monothiodiketones) were condensed with arylhydrazines in the presence of potassium tert-butoxide in refluxing tert-butyl alcohol, yielding 1-aryl-3,5-bis(het)arylpyrazoles 9 with complementary regioselectivity (method A). The efficiency of this protocol was further improved by developing a one-pot, three-component procedure for the synthesis of pyrazoles 9, directly from active methylene ketones, by reacting in situ generated 3-(methylthio)-1,3-bis(het)aryl-2-propenones with arylhydrazines in the presence of sodium hydride (instead of potassium tert-butoxide as base). The structures and regiochemistry of newly synthesized pyrazoles were confirmed from their spectral and analytical data along with X-ray crystallographic data of three pairs of regioisomers.
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Affiliation(s)
- S Vijay Kumar
- New Chemistry unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064, India
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