1
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Romero Reyes MA, Dutta S, Odagi M, Min C, Seidel D. Catalytic enantioselective synthesis of 2-pyrazolines via one-pot condensation/6π-electrocyclization: 3,5-bis(pentafluorosulfanyl)-phenylthioureas as powerful hydrogen bond donors. Chem Sci 2024; 15:d4sc04760e. [PMID: 39239480 PMCID: PMC11369865 DOI: 10.1039/d4sc04760e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Accepted: 08/25/2024] [Indexed: 09/07/2024] Open
Abstract
A new conjugate-base-stabilized carboxylic acid (CBSCA) containing a 3,5-bis(pentafluorosulfanyl)phenylthiourea functionality catalyses challenging one-pot condensations/6π-electrocyclizations of hydrazines and α,β-unsaturated ketones under mild conditions. Structurally diverse N-aryl 2-pyrazolines are obtained in good yields and enantioselectivities. The superior performance of 3,5-bis(SF5)phenylthioureas over the widely used 3,5-bis(CF3)phenylthioureas is further demonstrated in the Michael addition of dimethyl malonate to nitrostyrene, using a new Takemoto-type catalyst.
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Affiliation(s)
- Moises A Romero Reyes
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida Gainesville Florida 32611 USA
| | - Subhradeep Dutta
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida Gainesville Florida 32611 USA
| | - Minami Odagi
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida Gainesville Florida 32611 USA
| | - Chang Min
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey Piscataway New Jersey 08854 USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida Gainesville Florida 32611 USA
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2
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He F, Sun Z, Xu Y, Yu J, Li W, Miao H, Wu C. Photoinduced [3+2] Cycloaddition of Alkyl-Acceptor Diazoalkanes: Diversity-Oriented Synthesis of Pyrazolines Containing a Quaternary Center. Org Lett 2024; 26:4031-4036. [PMID: 38277125 DOI: 10.1021/acs.orglett.3c04296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
We present a new [3+2] cycloaddition reaction between alkyl-acceptor diazoalkanes under visible light irradiation. By employing easily accessible alkyl-acceptor-type diazoalkanes or their precursor hydrazones as both 1,3-dipoles and dipolarophiles, a diverse range of pyrazoline derivatives featuring a quaternary center have been efficiently synthesized in a predictable manner, with excellent functional group tolerance and good yields. Furthermore, scale-up experiments and downstream transformations of the product were also detailed.
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Affiliation(s)
- Fengya He
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Ziyi Sun
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Yiwei Xu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Jingwen Yu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Wenyong Li
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Hui Miao
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Chenggui Wu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
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3
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Das D, Kamilya C, Ghorai P. Hydrazine Hydrate in Asymmetric Synthesis: A Bifunctional Squaramide Catalytic Approach toward Fused Pyrazolines. Org Lett 2023; 25:6993-6998. [PMID: 37728280 DOI: 10.1021/acs.orglett.3c02529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
A unified strategy has been developed to utilize hydrazine hydrate in asymmetric organic synthesis by overcoming the rapid background reaction with dienone. The H-bond donor ability of the cinchona-alkaloid-derived squaramide catalyst unlocks this previously deemed infeasibility. The dissymmetric hydrazine addition to symmetrical dienones tolerates various substitutions, resulting in the formation of optically pure fused pyrazoline derivatives under mild reaction conditions. Furthermore, the scalability of this methodology and a successful demonstration of postsynthetic transformations have been accomplished.
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Affiliation(s)
- Dipankar Das
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Chandan Kamilya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
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4
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Hao L, Wang Z, Wang Y, Yang Z, Liu X, Xu X, Ji Y. Synthesis of pyrazoles from sulfonyl hydrazone and benzyl acrylate under transition-metal-free conditions. Org Biomol Chem 2023; 21:7611-7615. [PMID: 37681741 DOI: 10.1039/d3ob01172k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Pyrazoles as an important class of heterocyclic compounds, are widely found in pharmaceuticals and bioactive natural products. Herein we report a [3 + 2] cycloaddition reaction for the synthesis of a series of pyrazoles, with the yield up to 77%. This approach exhibits many notable features, such as convenient operating conditions, excellent functional group compatibility and readily accessible raw materials, providing an alternative route for the construction of pyrazole derivatives.
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Affiliation(s)
- Liqiang Hao
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Zhichao Wang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Yangyang Wang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Zhaoziyuan Yang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xian Liu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xiaobo Xu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Yafei Ji
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
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5
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Jiang DF, Qi Z, Li D, Wen SM, Liu Z, Hao WJ, Jiang B. PhI(OAc) 2-mediated aminoacyloxylation of β,γ-unsaturated hydrazones using Togni reagent II as an acyloxyl precursor. Org Biomol Chem 2023; 21:6757-6761. [PMID: 37615101 DOI: 10.1039/d3ob01125a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
A metal-free protocol for the direct construction of C(sp2)-N and C-O bonds via a PhI(OAc)2-mediated dehydrogenative aminoacyloxylation of β,γ-unsaturated hydrazones with Togni reagent II is reported. Initiated by the carboxyl-containing species generated in situ from Togni reagent II, this method offers a new solution for regioselective functionalization at a remote site on β,γ-unsaturated hydrazones, thus providing a straightforward method for the synthesis of acyloxyl-substituted pyridazines. This reaction features a broad substrate scope and mild conditions.
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Affiliation(s)
- Dong-Fang Jiang
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Provincial First-Class Applied Discipline (Pharmacy), Changsha, 410219, China.
| | - Zhenjie Qi
- Department of Engineering, Jining University, Qufu, Shandong, 273155, P. R. China.
| | - Dengfeng Li
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Provincial First-Class Applied Discipline (Pharmacy), Changsha, 410219, China.
| | - Si-Miaomiao Wen
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Provincial First-Class Applied Discipline (Pharmacy), Changsha, 410219, China.
| | - Zhao Liu
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Provincial First-Class Applied Discipline (Pharmacy), Changsha, 410219, China.
| | - Wen-Juan Hao
- School of Chemistry & Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
| | - Bo Jiang
- School of Chemistry & Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
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6
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Qi Z, Wen SM, Wu Q, Jiang DF, Hao WJ, Jiang B. Annulative Aminosulfonylation of Unactivated Alkenes for Accessing Pyrazolines via Multicomponent SO 2 Insertion. J Org Chem 2023; 88:11874-11884. [PMID: 37535756 DOI: 10.1021/acs.joc.3c01163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
A direct arylsulfonylation of β,γ-unsaturated hydrazones method, in which sulfonated pyrazolines are accessed by a three-component reaction of β,γ-unsaturated hydrazones, DABSO, and aryldiazonium tetrafluoroborates, has been developed without external oxidants or catalysts. This transformation is triggered by the formation of arylsulfonyl radicals in situ from the reaction of aryldiazonium tetrafluoroborates and DABSO, and is enabled by controllable generation of C center radical, in which DABSO was utilized as the sulfone source and an oxidant in this radical-mediated cascaded reaction. A wide range of substrates can be applied in this process to afford pyrazolines in good yield, and it is amenable for gram-scale synthesis.
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Affiliation(s)
- Zhenjie Qi
- Department of Engineering, Jining University, Qufu 273155, Shandong, China
| | - Si-Miaomiao Wen
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Provincial First-Class Applied Discipline (Pharmacy), Changsha Medical University, Changsha 410000, China
| | - Quansen Wu
- Department of Engineering, Jining University, Qufu 273155, Shandong, China
| | - Dong-Fang Jiang
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Provincial First-Class Applied Discipline (Pharmacy), Changsha Medical University, Changsha 410000, China
| | - Wen-Juan Hao
- School of Chemistry & Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Bo Jiang
- School of Chemistry & Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
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7
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Kani R, Inuzuka T, Kubota Y, Funabiki K. Synthesis of 1‐Trifluoromethylated Propargyl Alcohols by Two Successive Reactions of Cyclopentylmagnesium Bromide in a One‐Pot Manner. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ryunosuke Kani
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Toshiyasu Inuzuka
- Division of Instrumental Analysis Life Science Research Center Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
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8
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Wang Y, Wu S, Wang L, Sun J, Yan CG, Han Y. Synthesis of dihydropyrazoles enabled by Pd-catalyzed carboamination of alkenyl hydrazones with alkenyl and aryl halides. Org Chem Front 2022. [DOI: 10.1039/d2qo00653g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of dihydropyrazoles enabled by Pd-catalyzed carboamination of alkenyl hydrazones with alkenyl or aryl halides is described. This method provides a practical and efficient route towards the synthesis of functionalized dihydropyrazoles.
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Affiliation(s)
- Yinqiang Wang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Shuaijie Wu
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Lei Wang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Jing Sun
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Chao-Guo Yan
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Ying Han
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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9
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Hu F, Zhang H, Chu Y, Hui XP. Efficiently enantioselective synthesis of pyrazolines and isoxazolines enabled by iridium-catalyzed intramolecular allylic substitution reactions. Org Chem Front 2022. [DOI: 10.1039/d2qo00147k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Ir-catalyzed enantioselective intramolecular allylic substitution reaction of 2-tosylhydrazono or hydroxyimino carbonates for the synthesis of pyrazolines and isoxazolines has been achieved. The products were obtained in high yield...
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10
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Ashitha KT, Krishna A, Basavaraja D, Sasidhar BS. Recent Advances in the Transition Metal-Free Synthesis of Heterocycles from α, β-Unsaturated Ketones. Org Chem Front 2022. [DOI: 10.1039/d2qo00278g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterocyclic compounds are an inevitable part of our life. These important classes of molecules have a wide range of applications starting from life-sustaining drugs to agrochemicals. Numerous methods, including metal...
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11
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Volpe C, Meninno S, Crescenzi C, Mancinelli M, Mazzanti A, Lattanzi A. Catalytic Enantioselective Access to Dihydroquinoxalinones via Formal α‐Halo Acyl Halide Synthon in One Pot. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chiara Volpe
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
| | - Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
| | - Carlo Crescenzi
- Dipartimento di Farmacia Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
| | - Michele Mancinelli
- Dipartimento di Chimica Industriale Università di Bologna Viale Risorgimento 4-40136 Bologna Italy
| | - Andrea Mazzanti
- Dipartimento di Chimica Industriale Università di Bologna Viale Risorgimento 4-40136 Bologna Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
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12
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Volpe C, Meninno S, Crescenzi C, Mancinelli M, Mazzanti A, Lattanzi A. Catalytic Enantioselective Access to Dihydroquinoxalinones via Formal α-Halo Acyl Halide Synthon in One Pot. Angew Chem Int Ed Engl 2021; 60:23819-23826. [PMID: 34437760 PMCID: PMC8596509 DOI: 10.1002/anie.202110173] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Indexed: 11/25/2022]
Abstract
An enantioselective one-pot catalytic strategy to dihydroquinoxalinones, featuring novel 1-phenylsulfonyl-1-cyano enantioenriched epoxides as masked α-halo acyl halide synthons, followed by a domino ring-opening cyclization (DROC), is documented. A popular quinine-derived urea served as the catalyst in two out of the three steps performed in the same solvent using commercially available aldehydes, (phenylsulfonyl)acetonitrile, cumyl hydroperoxide and 1,2-phenylendiamines. Medicinally relevant 3-aryl/alkyl-substituted heterocycles are isolated in generally good to high overall yield and high enantioselectivity (up to 99 % ee). A rare example of excellent reusability of an organocatalyst at higher scale, subjected to oxidative conditions, is demonstrated. Mechanistically, labile α-ketosulfone has been detected as the intermediate involved in the DROC process. Theoretical calculations on the key epoxidation step rationalize the observed stereocontrol, highlighting the important role played by the sulfone group.
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Affiliation(s)
- Chiara Volpe
- Dipartimento di Chimica e Biologia “A. Zambelli”Università di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
| | - Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli”Università di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
| | - Carlo Crescenzi
- Dipartimento di FarmaciaUniversità di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
| | - Michele Mancinelli
- Dipartimento di Chimica IndustrialeUniversità di BolognaViale Risorgimento4-40136BolognaItaly
| | - Andrea Mazzanti
- Dipartimento di Chimica IndustrialeUniversità di BolognaViale Risorgimento4-40136BolognaItaly
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli”Università di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
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13
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Zhao P, Li Z, He J, Liu X, Feng X. Asymmetric catalytic 1,3-dipolar cycloaddition of α-diazoesters for synthesis of 1-pyrazoline-based spirochromanones and beyond. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1027-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Golovanov AA, Odin IS, Gusev DM, Vologzhanina AV, Sosnin IM, Grabovskiy SA. Reactivity of Cross-Conjugated Enynones in Cyclocondensations with Hydrazines: Synthesis of Pyrazoles and Pyrazolines. J Org Chem 2021; 86:7229-7241. [PMID: 33955756 DOI: 10.1021/acs.joc.1c00569] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The cyclocondensation of cross-conjugated enynones, dienynones, and trienynones (easily available due to low-cost starting compounds) with arylhydrazines leads to the regioselective synthesis of pyrazole derivatives (dihetaryl-substituted ethens, buta-1,3-diens, and hexa-1,3,5-triens) or results in 4,5-dihydro-1H-pyrazoles in good yield. The reaction path is controlled by the character of the substituent in enynone: the pyrazoles are obtained from the reaction of substrates that contain five-membered heteroaromatic substituents with arylhydrazines, and the 4,5-dihydro-1H-pyrazoles are obtained from the reaction of 1,5-diphenylpent-1-en-4-yn-3-one with arylhydrazines consistently. Despite the presence of a substituent, cyclocondensation of 2-hydrazinylpyridine with all of examined cross-conjugated enynones leads to the formation of pyrazoles. The reaction does not require special conditions (temperature, catalyst, inert atmosphere). The cyclocondensation pathways are determined by the electronic effect of an electron-rich five-membered heteroaromatic ring in the substrate. The synthesis allows use of various substituents and functional groups in enynone and hydrazine. The present method features high yields and simplicity of the product purification. The obtained pyrazoles possess fluorescent properties with a quantum yield up to 31%.
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Affiliation(s)
| | - Ivan S Odin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Dmitry M Gusev
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Anna V Vologzhanina
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Science, 28 Vavilova Str., 119991 Moscow, Russia
| | - Ilya M Sosnin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Stanislav A Grabovskiy
- Ufa Institute of Chemistry, UFRS of the Russian Academy of Science, 71 October Av., 450054 Ufa, Russia
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15
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Muzalevskiy VM, Sizova ZA, Panyushkin VV, Chertkov VA, Khrustalev VN, Nenajdenko VG. α,β-Disubstituted CF 3-Enones as a Trifluoromethyl Building Block: Regioselective Preparation of Totally Substituted 3-CF 3-Pyrazoles. J Org Chem 2021; 86:2385-2405. [PMID: 33423495 DOI: 10.1021/acs.joc.0c02516] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient pathway toward a novel class of trifluoromethyl building blocks was elaborated. The reaction of α-CF3-enamines with arylaldehydes resulted in direct synthesis of α,β-diaryl-CF3-enones isolated in up to 93% yield as E-isomers. The possible reaction mechanism was proposed using the Zimmerman-Traxler model. The reaction of α,β-diaryl-CF3-enones with hydrazines opens a novel pathway to trifluoromethylated pyrazolines. Oxidation of pyrazolines with DDQ opened access to totally regioselective preparation of 3-CF3-pyrazoles isolated in high yield. Using this strategy, 4-arylated derivatives of known drugs Celebrex, Mavacoxib, and SC-560 can be synthesized.
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Affiliation(s)
- Vasiliy M Muzalevskiy
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Zoia A Sizova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Vasiliy V Panyushkin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Vyacheslav A Chertkov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia, Moscow 117198, Russia.,N. D. Zelinsky Institute of Organic Chemistry of RAS, 47 Leninsky Prospect, Moscow 119991, Russia
| | - Valentine G Nenajdenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
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16
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Nagaraju K, Gurubrahamam R, Chen K. Organocatalytic Diastereoselective Synthesis of Diazoaryl-benzo[b]azepine Derivatives. J Org Chem 2020; 85:7060-7067. [DOI: 10.1021/acs.joc.0c00431] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Koppanathi Nagaraju
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
| | - Ramani Gurubrahamam
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
- Department of Chemistry, Indian Institute of Technology Jammu, Jagti, NH 44, Jammu (J&K) 181221, India
| | - Kwunmin Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
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17
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Chagarovskiy AO, Kuznetsov VV, Ivanova OA, Goloveshkin AS, Levina II, Makhova NN, Trushkov IV. Synthesis of 1-Substituted Pyrazolines by Reaction of Donor-Acceptor Cyclopropanes with 1,5-Diazabicyclo[3.1.0]hexanes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900579] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Alexey O. Chagarovskiy
- Oncology and Immunology; Dmitry Rogachev National Research Center of Pediatric Hematology; 117997 Russian Federation
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences; Leninsky pr. 47 119991 Moscow Russian Federation
| | - Vladimir V. Kuznetsov
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences; Leninsky pr. 47 119991 Moscow Russian Federation
| | - Olga A. Ivanova
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences; Leninsky pr. 47 119991 Moscow Russian Federation
- Department of Chemistry; M. V. Lomonosov Moscow State University; Leninskie Gory 1-3 119991 Moscow Russian Federation
| | - Alexander S. Goloveshkin
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences; Vavilova 28 119991 Moscow Russian Federation
| | - Irina I. Levina
- N. M. Emanuel Institute of Biochemical Physics Russian Academy of Sciences; Kosygina 4 119334 Moscow Russian Federation
| | - Nina N. Makhova
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences; Leninsky pr. 47 119991 Moscow Russian Federation
| | - Igor V. Trushkov
- Oncology and Immunology; Dmitry Rogachev National Research Center of Pediatric Hematology; 117997 Russian Federation
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences; Leninsky pr. 47 119991 Moscow Russian Federation
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