1
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Wang K, Xu W, Xia C, Cao X. Temperature-Controlled Divergent Synthesis of Pyrazoles and 1-Tosyl-1 H-pyrazoles under Transition-Metal-Catalyst- and Oxidant-Free Conditions. Molecules 2024; 29:1706. [PMID: 38675526 PMCID: PMC11052136 DOI: 10.3390/molecules29081706] [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: 02/25/2024] [Revised: 03/28/2024] [Accepted: 03/30/2024] [Indexed: 04/28/2024] Open
Abstract
Herein, a general and practical temperature-controlled approach for the divergent synthesis of pyrazoles and 1-tosyl-1H-pyrazoles via electrophilic cyclization in the absence of transition-metal catalysts and oxidants was developed. The desired products were obtained in moderate to excellent yields from common starting materials in both ionic liquids and ethanol by simply tuning the reaction temperature. This strategy employs easily synthesized substrates, mild reaction conditions, and excellent functional-group tolerance.
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Affiliation(s)
- Kai Wang
- College of Medical Engineering & The Key Laboratory for Medical Functional Nanomaterials, Jining Medical University, Jining 272067, China; (K.W.); (W.X.)
| | - Wenjing Xu
- College of Medical Engineering & The Key Laboratory for Medical Functional Nanomaterials, Jining Medical University, Jining 272067, China; (K.W.); (W.X.)
| | - Chengcai Xia
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 271016, China
| | - Xianting Cao
- College of Medical Engineering & The Key Laboratory for Medical Functional Nanomaterials, Jining Medical University, Jining 272067, China; (K.W.); (W.X.)
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2
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Lin WS, Kuwata S. Recent Developments in Reactions and Catalysis of Protic Pyrazole Complexes. Molecules 2023; 28:molecules28083529. [PMID: 37110763 PMCID: PMC10143336 DOI: 10.3390/molecules28083529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Protic pyrazoles (N-unsubstituted pyrazoles) have been versatile ligands in various fields, such as materials chemistry and homogeneous catalysis, owing to their proton-responsive nature. This review provides an overview of the reactivities of protic pyrazole complexes. The coordination chemistry of pincer-type 2,6-bis(1H-pyrazol-3-yl)pyridines is first surveyed as a class of compounds for which significant advances have made in the last decade. The stoichiometric reactivities of protic pyrazole complexes with inorganic nitrogenous compounds are then described, which possibly relates to the inorganic nitrogen cycle in nature. The last part of this article is devoted to outlining the catalytic application of protic pyrazole complexes, emphasizing the mechanistic aspect. The role of the NH group in the protic pyrazole ligand and resulting metal-ligand cooperation in these transformations are discussed.
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Affiliation(s)
- Wei-Syuan Lin
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 E4-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shigeki Kuwata
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu 525-8577, Shiga, Japan
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3
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Muravev AA, Ovsyannikov AS, Konorov GV, Islamov DR, Usachev KS, Novikov AS, Solovieva SE, Antipin IS. Thermodynamic vs. Kinetic Control in Synthesis of O-Donor 2,5-Substituted Furan and 3,5-Substituted Pyrazole from Heteropropargyl Precursor. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27165178. [PMID: 36014420 PMCID: PMC9413326 DOI: 10.3390/molecules27165178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/07/2022] [Accepted: 08/12/2022] [Indexed: 02/05/2023]
Abstract
Elaboration of a convenient route towards donor-substituted pyrazoles from heteropropargyl precursors is challenging due to a number of thermodynamically favorable side reactions (e.g., acetylene-allene isomerization and Glaser homocoupling). In this work, Sonogashira cross-coupling conditions of 4-tert-butylphenyl propargyl ether with benzoyl chloride followed by tandem Michael addition/cyclocondensation with hydrazine into 3,5-disubstituted pyrazole (kinetic control), as well as cycloisomerization conditions of ketoacetylene intermediate into 2,5-disubstituted furan (thermodynamic control), were established through a variation of the catalyst loading, solvent polarity, excess of triethylamine, and time of reaction. During the optimization of process parameters, a number of by-products represented by a monophosphine binuclear complex (PPh3PdI2)2 with two bridging iodine atoms and diyne were identified and isolated in the pure form. The quantum-chemical calculations and solution-state 1H/13C NMR spectroscopy suggested that the 5(3)-(4-tert-butylphenyloxy)methoxy-3(5)-phenyl-1H-pyrazole exists in the tautomeric equilibrium in a polar methanol solvent and that individual tautomers could be characterized in case aprotic solvents employed. The pyrazole features a unique tetramer motif in the crystal phase formed by alternating 3(5)-phenyl-1H-pyrazole tautomers, which was stabilized by N-H···N bonds and stacking interactions of pyrazole rings, whereas pyrazole dimers were identified in the gas phase.
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Affiliation(s)
- Anton A. Muravev
- Infochemistry Scientific Center, ITMO University, 191002 St.-Petersburg, Russia
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420008 Kazan, Russia
- Correspondence:
| | - Alexander S. Ovsyannikov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420008 Kazan, Russia
| | - Gennady V. Konorov
- Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
| | - Daut R. Islamov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420008 Kazan, Russia
| | - Konstantin S. Usachev
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia
| | - Alexander S. Novikov
- Institute of Chemistry, St.-Petersburg State University, 199034 St.-Petersburg, Russia
- Joint Research Institute of Chemistry, Faculty of Physics, Mathematics and Natural Sciences, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Svetlana E. Solovieva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420008 Kazan, Russia
| | - Igor S. Antipin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420008 Kazan, Russia
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4
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Wang Q, Hong G, Tang Z, Yang P, Zhong Y, Gong Y, Wang L. Divergent Synthesis of 3,5‐disubstituted Pyrazoles and α, β‐alkynic hydrazone from Diarylpropynones and Carbazates. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qi Wang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Gang Hong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Zhicong Tang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Peng Yang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Yi Zhong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Yu Gong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Limin Wang
- East China University of Science and Technology School of Chemical and Molecular Engineering 130 Meilong Road 200237 Shanghai CHINA
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5
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Kashiwame Y, Ikariya T, Kuwata S. Synthesis, structures, and reactivities of six-membered C N chelate protic pyrazole complexes of iridium. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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6
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Zhao P, Zeng Z, Feng X, Liu X. Multisubstituted pyrazole synthesis via [3 + 2] cycloaddition/rearrangement/N H insertion cascade reaction of α-diazoesters and ynones. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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7
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Ma H, Zhou X, Han B, Li R, Hou X, Ji X, Zhang Y, Huang G, Wang J. A Catalyst-Free One-Pot Protocol for the Construction of Substituted Sulfonyl Pyrazoles. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Juhász K, Hell Z. Palladium(II) on 4 Å Molecular Sieves: A Simple and Reusable Catalyst for the Preparation of Ynones. Catal Letters 2020. [DOI: 10.1007/s10562-020-03235-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Abstract
Pd2+ on 4 Å molecular sieves support has been prepared and investigated. The catalyst has successfully been used in the reaction of acyl chlorides and terminal alkynes yielding ynones. The catalyst can be reused without significant loss of activity.
Graphic Abstract
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9
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Hussain N, Chhalodia AK, Ahmed A, Mukherjee D. Recent Advances in Metal‐Catalyzed Carbonylation Reactions by Using Formic Acid as CO Surrogate. ChemistrySelect 2020. [DOI: 10.1002/slct.202003395] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Nazar Hussain
- Natural Product Chemistry Division CSIR-Indian Institute of Integrative Medicine India
| | - Anuj Kumar Chhalodia
- Natural Product Chemistry Division CSIR-Indian Institute of Integrative Medicine India
| | - Ajaz Ahmed
- Natural Product Chemistry Division CSIR-Indian Institute of Integrative Medicine India
| | - Debaraj Mukherjee
- Natural Product Chemistry Division CSIR-Indian Institute of Integrative Medicine India
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10
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Synthesis and comparative study of catalytic activity between Pd-metallodendrimer and Pd/Cu-bimetallodendrimer nanoparticle-based on triazine. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2019.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Lakshmi PK, Markandeya SV, Sridhar C, Babu K R. MnCl
2
‐Mediated Carbonylative Sonogashira Coupling of Aryl Iodides and Aromatic Terminal Alkynes by Using CO. ChemistrySelect 2019. [DOI: 10.1002/slct.201903132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Parvathi K. Lakshmi
- Department of Medicinal ChemistryGVK Biosciences Pvt. Ltd., IDA Mallapur, Hyderabad Telangana India
- Department of Engineering ChemistryAndhra University, Visakhapatnam Andhra Pradesh India
| | - Sarma V. Markandeya
- Department of Medicinal ChemistryGVK Biosciences Pvt. Ltd., IDA Mallapur, Hyderabad Telangana India
- Department of Engineering ChemistryAndhra University, Visakhapatnam Andhra Pradesh India
| | - Chidara Sridhar
- Department of Medicinal ChemistryGVK Biosciences Pvt. Ltd., IDA Mallapur, Hyderabad Telangana India
| | - Raghu Babu K
- Department of Engineering ChemistryAndhra University, Visakhapatnam Andhra Pradesh India
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12
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Palladium-catalyzed carbonylative Sonogashira cross-coupling for the synthesis of alkynones with formic acid as the CO source. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-018-2331-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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13
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Thirukovela NS, Balaboina R, Botla V, Vadde R, Jonnalagadda SB, Vasam CS. One-pot regioselective synthesis of substituted pyrazoles and isoxazoles in PEG-400/water medium by Cu-free nano-Pd catalyzed sequential acyl Sonogashira coupling–intramolecular cyclization. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01335k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Catalyst efficacy of in situ generated Pd-nanoparticles in the regioselective one-pot synthesis of substituted pyrazoles and isoxazoles via sequential coupling-cyclization methodology in environmentally benign medium is described.
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14
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Alshakova ID, Gabidullin B, Nikonov GI. Ru‐Catalyzed Transfer Hydrogenation of Nitriles, Aromatics, Olefins, Alkynes and Esters. ChemCatChem 2018. [DOI: 10.1002/cctc.201801039] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Iryna D. Alshakova
- Chemistry DepartmentBrock University 1812 Sir Isaac Brock Way, St. Catharines, Niagara Region L2S 3 A1 Ontario Canada
| | - Bulat Gabidullin
- X-ray Core Facility Faculty of ScienceUniversity of Ottawa 150 Louis Pasteur Ottawa, ON K1 N 6 N5 Canada
| | - Georgii I. Nikonov
- Chemistry DepartmentBrock University 1812 Sir Isaac Brock Way, St. Catharines, Niagara Region L2S 3 A1 Ontario Canada
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15
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Yang GP, He X, Yu B, Hu CW. Cu1.5
PMo12
O40
-catalyzed condensation cyclization for the synthesis of substituted pyrazoles. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4532] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Guo-Ping Yang
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic, School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
- China Academy of Engineering Physics; P. R. China
| | - Xing He
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic, School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Bing Yu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 Henan Province P. R. China
| | - Chang-Wen Hu
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic, School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
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16
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Baeva LA, Nugumanov RM, Fatykhov AA, Lyapina NK. Synthesis of 4-[Alkylsulfanyl(sulfonyl)methyl]isoxazoles and -1H-pyrazoles from 3-[(Alkylsulfanyl)methyl]- pentane-2,4-diones. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s1070428018030120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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17
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Meng M, Wang G, Yang L, Cheng K, Qi C. Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701469] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mengting Meng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Guofang Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Liangfeng Yang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Kai Cheng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
| | - Chenze Qi
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process; Shaoxing University; 312000 Shaoxing People's Republic of China
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18
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Kim S, Kang SW, Kim A, Yusuf M, Park JC, Park KH. A highly efficient nano-sized Cu2O/SiO2egg-shell catalyst for C–C coupling reactions. RSC Adv 2018; 8:6200-6205. [PMID: 35540388 PMCID: PMC9078257 DOI: 10.1039/c7ra13490h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 01/22/2018] [Indexed: 02/02/2023] Open
Abstract
Mesoporous SiO2-supported Cu2O nanoparticles as an egg-shell type catalyst were prepared by impregnation method. The obtained Cu2O/SiO2 egg-shell nanocatalyst had a large surface area and narrow pore size distribution. In addition, most of the Cu2O nanoparticles, with sizes around 2.0 nm, were highly dispersed in the mesoporous silica. Accordingly, fast reactant diffusion to the active sites would occur, especially when the active metal sites are selectively located on the outer part of the support, i.e., the outer region of the egg shell. In solvent-free Sonogashira reactions for the synthesis of ynones from acyl chlorides and terminal alkynes, this catalyst exhibited a very high catalytic activity. The excellent catalytic performance can be attributed to the synergistic advantages of mesoporous structure and monodispersed Cu2O nanoparticles. Mesoporous SiO2-supported Cu2O nanoparticles as an egg-shell type catalyst were prepared by impregnation method.![]()
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Affiliation(s)
- Soohee Kim
- Department of Chemistry
- Chemistry Institute for Functional Materials
- Pusan National University
- Busan
- Republic of Korea
| | - Shin Wook Kang
- Clean Fuel Laboratory
- Korea Institute of Energy Research
- Daejeon
- Korea
| | - Aram Kim
- Department of Chemistry
- Chemistry Institute for Functional Materials
- Pusan National University
- Busan
- Republic of Korea
| | - Mohammad Yusuf
- Department of Chemistry
- Chemistry Institute for Functional Materials
- Pusan National University
- Busan
- Republic of Korea
| | - Ji Chan Park
- Clean Fuel Laboratory
- Korea Institute of Energy Research
- Daejeon
- Korea
| | - Kang Hyun Park
- Department of Chemistry
- Chemistry Institute for Functional Materials
- Pusan National University
- Busan
- Republic of Korea
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19
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Yang GP, Shang SX, Yu B, Hu CW. Ce(iii)-Containing tungstotellurate(vi) with a sandwich structure: an efficient Lewis acid–base catalyst for the condensation cyclization of 1,3-diketones with hydrazines/hydrazides or diamines. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00678d] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A new Ce3+ modified Dawson-like polyoxometalate cluster was synthesized, which showed good Lewis acid and Lewis base activities in the condensation reaction.
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Affiliation(s)
- Guo-Ping Yang
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
| | - Shu-Xia Shang
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
| | - Bing Yu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Chang-Wen Hu
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
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20
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Ahamad S, Patidar RK, Kumar A, Kant R, Mohanan K. Three-Component Synthesis of 3,4-Disubstituted Pyrazoles Using Diazosulfone as a Diazomethane Surrogate. ChemistrySelect 2017. [DOI: 10.1002/slct.201702384] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shakir Ahamad
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Rajesh Kumar Patidar
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Anuj Kumar
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Ruchir Kant
- Molecular and Structural Biology; CSIR-Central Drug Research Institute; Lucknow 226031 India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division; CSIR-Central Drug Research Institute; Lucknow 226031 India
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21
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Alshakova ID, Korobkov I, Kuzmina LG, Nikonov GI. Ruthenium complexes with a pyrazole-phosphine ligand. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.10.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Ojha NK, Zyryanov GV, Majee A, Charushin VN, Chupakhin ON, Santra S. Copper nanoparticles as inexpensive and efficient catalyst: A valuable contribution in organic synthesis. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.10.004] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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23
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Peng JB, Wu FP, Li CL, Qi X, Wu XF. A Convenient and Efficient Palladium-Catalyzed Carbonylative Sonogashira Transformation with Formic Acid as the CO Source. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700076] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jin-Bao Peng
- Department of Chemistry; Zhejiang Sci-Tech University; Xiasha Campus 310018 Hangzhou People's Republic of China
| | - Fu-Peng Wu
- Department of Chemistry; Zhejiang Sci-Tech University; Xiasha Campus 310018 Hangzhou People's Republic of China
| | - Chong-Liang Li
- Department of Chemistry; Zhejiang Sci-Tech University; Xiasha Campus 310018 Hangzhou People's Republic of China
| | - Xinxin Qi
- Department of Chemistry; Zhejiang Sci-Tech University; Xiasha Campus 310018 Hangzhou People's Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry; Zhejiang Sci-Tech University; Xiasha Campus 310018 Hangzhou People's Republic of China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
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24
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Sharma RK, Yadav M, Gaur R, Gupta R, Adholeya A, Gawande MB. Synthesis of Iron Oxide Palladium Nanoparticles and Their Catalytic Applications for Direct Coupling of Acyl Chlorides with Alkynes. Chempluschem 2016; 81:1312-1319. [DOI: 10.1002/cplu.201600321] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/06/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Rakesh K. Sharma
- Department of Chemistry; University of Delhi; 105, Block-B, First floor, GCNC Delhi 110007 India
| | - Manavi Yadav
- Department of Chemistry; University of Delhi; 105, Block-B, First floor, GCNC Delhi 110007 India
| | - Rashmi Gaur
- Department of Chemistry; University of Delhi; 105, Block-B, First floor, GCNC Delhi 110007 India
| | - Radhika Gupta
- Department of Chemistry; University of Delhi; 105, Block-B, First floor, GCNC Delhi 110007 India
| | - Alok Adholeya
- Biotechnology and Management of Bioresources Division; The Energy and Resources Institute; Darbari Seth Block, IHC Complex, Lodhi Road New Delhi 110003 India
| | - Manoj B. Gawande
- Regional Centre of Advanced Technologies and Materials; Department of Physical Chemistry; Faculty of Science; Palacký University; Šlechtitelů 27 783 71 Olomouc Czech Republic
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25
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Kiyokawa K, Ito Y, Kakehi R, Ogawa T, Goto Y, Yoshimatsu M. Propargyl Hydrazides as Useful Intermediates Leading to Pyrazoles via Reaction with Certain Electrophiles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600708] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kosuke Kiyokawa
- Department of Chemistry; Faculty of Education; Gifu University; Yanagido 1-1 501-1193 Gifu Japan
| | - Yukiteru Ito
- Department of Chemistry; Faculty of Education; Gifu University; Yanagido 1-1 501-1193 Gifu Japan
| | - Ryoma Kakehi
- Department of Chemistry; Faculty of Education; Gifu University; Yanagido 1-1 501-1193 Gifu Japan
| | - Takahiro Ogawa
- Department of Chemistry; Faculty of Education; Gifu University; Yanagido 1-1 501-1193 Gifu Japan
| | - Yusuke Goto
- Department of Chemistry; Faculty of Education; Gifu University; Yanagido 1-1 501-1193 Gifu Japan
| | - Mitsuhiro Yoshimatsu
- Department of Chemistry; Faculty of Education; Gifu University; Yanagido 1-1 501-1193 Gifu Japan
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26
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Chen Q, Yao F, Yin L, Cai M. A highly efficient heterogeneous palladium-catalyzed cascade three-component reaction of acid chlorides, terminal alkynes and hydrazines leading to pyrazoles. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.12.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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27
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Sun G, Lei M, Hu L. A facile and efficient method for the synthesis of alkynone by carbonylative Sonogashira coupling using CHCl3 as the CO source. RSC Adv 2016. [DOI: 10.1039/c6ra02424f] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A facile and efficient method for the synthesis of alkynones by a Pd-catalyzed carbonylative Sonogashira coupling reaction starting from aryl iodide, terminal alkyne and chloroform (CHCl3) as the CO source is described.
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Affiliation(s)
- Guanglong Sun
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- P. R. China
| | - Min Lei
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- P. R. China
| | - Lihong Hu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- P. R. China
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28
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Qi X, Jiang LB, Li CL, Li R, Wu XF. Palladium-Catalyzed One-Pot Carbonylative Sonogashira Reaction Employing Formic acid as the CO Source. Chem Asian J 2015; 10:1870-3. [PMID: 26097102 DOI: 10.1002/asia.201500518] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Indexed: 01/13/2023]
Abstract
A convenient palladium-catalyzed carbonylative coupling of aryl iodides and terminal alkynes with formic acid as the CO precursor has been developed. A variety of alkynones were obtained in good yields in a one-pot manner for the first time.
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Affiliation(s)
- Xinxin Qi
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campous, Hangzhou, 310018, People's Republic of China
| | - Li-Bing Jiang
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campous, Hangzhou, 310018, People's Republic of China
| | - Chong-Liang Li
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campous, Hangzhou, 310018, People's Republic of China
| | - Rui Li
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campous, Hangzhou, 310018, People's Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campous, Hangzhou, 310018, People's Republic of China. .,Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany.
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29
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Liu X, Yu L, Luo M, Zhu J, Wei W. Radical-Induced Metal-Free Alkynylation of Aldehydes by Direct CH Activation. Chemistry 2015; 21:8745-9. [DOI: 10.1002/chem.201501094] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Indexed: 01/04/2023]
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30
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Zaiter J, Achibat H, Amiri O, Hafid A, Khouili M, Rakib EM, Neves CMB, Neves MGPMS, Silva AMS, Cavaleiro JAS, Almeida Paz FA, Faustino MAF. An easy synthetic access to new pyrazole spiro derivatives from 3-amino-1-phenyl-2-pyrazolin-5-one. NEW J CHEM 2015. [DOI: 10.1039/c5nj01306b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyrazole and pyrazolone moieties have shown important biological activities.
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Affiliation(s)
- Jamila Zaiter
- Laboratoire de Chimie Organique & Analytique
- Université Sultan Moulay Slimane
- Faculté des Sciences et Techniques
- 23000 Béni-Mellal
- Morocco
| | - Hanane Achibat
- Laboratoire de Chimie Organique & Analytique
- Université Sultan Moulay Slimane
- Faculté des Sciences et Techniques
- 23000 Béni-Mellal
- Morocco
| | - Ouafa Amiri
- Laboratoire de Chimie Organique & Analytique
- Université Sultan Moulay Slimane
- Faculté des Sciences et Techniques
- 23000 Béni-Mellal
- Morocco
| | - Abderrafia Hafid
- Laboratoire de Chimie Organique & Analytique
- Université Sultan Moulay Slimane
- Faculté des Sciences et Techniques
- 23000 Béni-Mellal
- Morocco
| | - Mostafa Khouili
- Laboratoire de Chimie Organique & Analytique
- Université Sultan Moulay Slimane
- Faculté des Sciences et Techniques
- 23000 Béni-Mellal
- Morocco
| | - El Mostapha Rakib
- Laboratoire de Chimie Organique & Analytique
- Université Sultan Moulay Slimane
- Faculté des Sciences et Techniques
- 23000 Béni-Mellal
- Morocco
| | - Cláudia M. B. Neves
- Department of Chemistry and QOPNA
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | | - Artur M. S. Silva
- Department of Chemistry and QOPNA
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | | - Filipe A. Almeida Paz
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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31
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32
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Wang Z, Li L, Huang Y. A General Synthesis of Ynones from Aldehydes via Oxidative C–C bond Cleavage under Aerobic Conditions. J Am Chem Soc 2014; 136:12233-6. [DOI: 10.1021/ja506352b] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Zhaofeng Wang
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
| | - Li Li
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yong Huang
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
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33
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Venkatapuram P, Tumma S, Dandu S, Chokkappagari P. Synthesis of Amido-linked Oxazolyl/Thiazolyl/Imidazolyl Pyrazoles and Isoxazoles. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.2185] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Sreelatha Tumma
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
| | - Seenaiah Dandu
- Department of Chemistry; Sri Venkateswara University; Tirupati 517 502 Andhra Pradesh India
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34
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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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35
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Harigae R, Moriyama K, Togo H. Preparation of 3,5-disubstituted pyrazoles and isoxazoles from terminal alkynes, aldehydes, hydrazines, and hydroxylamine. J Org Chem 2014; 79:2049-58. [PMID: 24512630 DOI: 10.1021/jo4027116] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The reaction of terminal alkynes with n-BuLi, and then with aldehydes, followed by the treatment with molecular iodine, and subsequently hydrazines or hydroxylamine provided the corresponding 3,5-disubstituted pyrazoles or isoxazoles in good yields with high regioselectivity, through the formations of propargyl secondary alkoxides and α-alkynyl ketones. The present reactions are one-pot preparation of 3,5-disubstituted pyrazoles from terminal alkynes, aldehydes, molecular iodine, and hydrazines, and 3,5-disubstituted isoxazoles from terminal alkynes, aldehydes, molecular iodine, and hydroxylamine.
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Affiliation(s)
- Ryo Harigae
- Graduate School of Science, Chiba University , Yayoi-cho 1-33, Inage-ku, Chiba 263-8522, Japan
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36
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37
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Specht ZG, Grotjahn DB, Moore CE, Rheingold AL. Effects of Hindrance in N-Pyridyl Imidazolylidenes Coordinated to Iridium on Structure and Catalysis. Organometallics 2013. [DOI: 10.1021/om400758b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zephen G. Specht
- Department
of Chemistry and Biochemistry, San Diego State University, 5500
Campanile Drive, San Diego, California 92182-1030, United States
| | - Douglas B. Grotjahn
- Department
of Chemistry and Biochemistry, San Diego State University, 5500
Campanile Drive, San Diego, California 92182-1030, United States
| | - Curtis E. Moore
- Department
of Chemistry and Biochemistry, University of California at San Diego, La
Jolla, California 92093-0358, United States
| | - Arnold L. Rheingold
- Department
of Chemistry and Biochemistry, University of California at San Diego, La
Jolla, California 92093-0358, United States
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38
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39
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Yuan H, Jin H, Li B, Shen Y, Yue R, Shan L, Sun Q, Zhang W. Pd/BaSO4-catalyzed cross coupling of acyl chlorides with in situ generated alkynylzinc derivatives for the synthesis of ynones. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0444] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An efficient and operationally simple procedure using Pd/BaSO4-catalyzed cross coupling of acyl chlorides with in situ generated alkynylzinc derivatives was developed, giving the corresponding ynones at yields of 50%–96%.
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Affiliation(s)
- Hu Yuan
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Huizi Jin
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bo Li
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Yunheng Shen
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Rongcai Yue
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Lei Shan
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Qingyan Sun
- Department of Organic Chemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Weidong Zhang
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Phytochemistry, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
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40
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Li Z, Liu J, Huang Z, Yang Y, Xia C, Li F. One-Pot Synthesis of Pd Nanoparticle Catalysts Supported on N-Doped Carbon and Application in the Domino Carbonylation. ACS Catal 2013. [DOI: 10.1021/cs400077r] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zelong Li
- State Key Laboratory for Oxo Synthesis
and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000,
P.R. China
- University of the Chinese Academy of Sciences, Beijing
100049, P.R. China
| | - Jianhua Liu
- State Key Laboratory for Oxo Synthesis
and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000,
P.R. China
| | - Zhiwei Huang
- State Key Laboratory for Oxo Synthesis
and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000,
P.R. China
| | - Ying Yang
- State Key Laboratory for Oxo Synthesis
and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000,
P.R. China
| | - Chungu Xia
- State Key Laboratory for Oxo Synthesis
and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000,
P.R. China
| | - Fuwei Li
- State Key Laboratory for Oxo Synthesis
and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000,
P.R. China
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41
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Lokhande PD, Hasanzadeh K, Khaledi H, Ali HM. Regioselective synthesis of 3,5-diaryl-4-methylisoxazoles. MONATSHEFTE FUR CHEMIE 2012. [DOI: 10.1007/s00706-012-0782-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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42
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Atobe S, Masuno H, Sonoda M, Suzuki Y, Shinohara H, Shibata S, Ogawa A. Pd-catalyzed coupling reaction of acid chlorides with terminal alkynes using 1-(2-pyridylethynyl)-2-(2-thienylethynyl)benzene ligand. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.01.105] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Bui The Thuong M, Catala C, Colas C, Schaeffer C, Van Dorsselaer A, Mann A, Wagner A. Trimethoxyarene as a Highly Ionizable Tag for Reaction Analysis by Atmospheric Pressure Photoionization Mass Spectrometry (APPI/MS): Exploration of Heterocyclic Synthesis. European J Org Chem 2012. [DOI: 10.1002/ejoc.201100919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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44
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Santra S, Ranjan P, Bera P, Ghosh P, Mandal SK. Anchored palladium nanoparticles onto single walled carbon nanotubes: Efficient recyclable catalyst for N-containing heterocycles. RSC Adv 2012. [DOI: 10.1039/c2ra20281f] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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45
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Zora M, Kivrak A. Synthesis of Pyrazoles via CuI-Mediated Electrophilic Cyclizations of α,β-Alkynic Hydrazones. J Org Chem 2011; 76:9379-90. [DOI: 10.1021/jo201685p] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Metin Zora
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
| | - Arif Kivrak
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
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46
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Fustero S, Sánchez-Roselló M, Barrio P, Simón-Fuentes A. From 2000 to mid-2010: a fruitful decade for the synthesis of pyrazoles. Chem Rev 2011; 111:6984-7034. [PMID: 21806021 DOI: 10.1021/cr2000459] [Citation(s) in RCA: 797] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Santos Fustero
- Departamento de Química Orgánica, Universidad de Valencia, Spain.
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47
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Gondoh A, Koike T, Akita M. 3,5-Bis(diphenylphosphinoethyl)pyrazolate ligand (PNNPC2) and its dirhodium complexes: Comparison with related quadridentate dinucleating diphenylphosphinomethyl (PNNPPy) and phthalazine derivatives (PNNPPh). Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Zora M, Kivrak A, Yazici C. Synthesis of Pyrazoles via Electrophilic Cyclization. J Org Chem 2011; 76:6726-42. [DOI: 10.1021/jo201119e] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Metin Zora
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
| | - Arif Kivrak
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
| | - Ceyda Yazici
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
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49
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Khan TA, Kumar S, Venkatesh C, Ila H. Regioselective rapid analog synthesis of 1,3-(or 1,5-)diphenyl-4-aryl/heteroaryl-5-(or 3-)(methylthio)pyrazoles via Suzuki cross-coupling. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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50
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Keivanloo A, Bakherad M, Bahramian B, Baratnia S. Silica-supported zinc bromide (ZnBr2/SiO2): a highly efficient heterogeneous catalyst for coupling acid chlorides with terminal alkynes. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.101] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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