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A Multifield Study on Dimethyl Acetylenedicarboxylate: A Reagent Able to Build a New Cycle on Diaminoimidazoles. Molecules 2022; 27:molecules27103326. [PMID: 35630803 PMCID: PMC9147549 DOI: 10.3390/molecules27103326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/16/2022] [Accepted: 05/20/2022] [Indexed: 11/23/2022] Open
Abstract
A new effective method for the synthesis of imidazo[1,5-b]pyridazines derivatives (yields = 68–89%) by the interaction of 1,2-diamino-4-phenylimidazole with DMAD, in methanol and in the presence of a catalytic amount of acetic acid, is proposed. The course of reaction has been examined by classical organic methods, HPLC-MS analysis, and quantum-chemical calculations.
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Li Z, Qiu K, Yang X, Zhou W, Cai Q. Base-Promoted Tandem S NAr/Boulton-Katritzky Rearrangement: Access to [1,2,4]Triazolo[1,5- a]pyridines. Org Lett 2022; 24:2989-2992. [PMID: 35441511 DOI: 10.1021/acs.orglett.2c00863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A base-promoted tandem SNAr/Boulton-Katritzky rearrangement is developed. It offers a simple and straightforward method for the formation of functionalized [1,2,4]triazolo[1,5-a]pyridines from 1,2,4-oxadiazol-3-amines or 3-aminoisoxazoles with 2-fluoropyridines.
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Affiliation(s)
- Zihao Li
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou 510630, China
| | - Kongxi Qiu
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou 510630, China
| | - Xiao Yang
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou 510630, China
| | - Wei Zhou
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou 510630, China
| | - Qian Cai
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou 510630, China
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Xiong H, Li Z, Tang H, He L, Zhou W. Tandem C-N Coupling/Boulton-Katritzky Rearrangement Reactions of 3-Aminoisoxazoles or 1,2,4-Oxadiazol-3-amines with 2-Pyridyl Trifluoromethanesulfonate: A Rapid Access to [1,2,4]Triazolo[1,5-a]pyridines. Org Chem Front 2022. [DOI: 10.1039/d2qo00514j] [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
An efficient and convenient synthesis of functionalized [1,2,4]triazolo[1,5-a]pyridines derivates is presented. The protocol is through a palladium catalyzed tandem C-N coupling/Boulton-Katritzky rearrangement process from 3-aminoisoxazoles or 1,2,4-oxadiazol-3-amines with 2-pyridyl trifluoromethanesulfonate....
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Chugunova E, Akylbekov N, Dobrynin A, Burilov A, Boga C, Micheletti G, Frenna V, Mattioli EJ, Calvaresi M, Spinelli D. 4,6-Dichloro-5-Nitrobenzofuroxan: Different Polymorphisms and DFT Investigation of Its Reactivity with Nucleophiles. Int J Mol Sci 2021; 22:13460. [PMID: 34948257 PMCID: PMC8709177 DOI: 10.3390/ijms222413460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/09/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022] Open
Abstract
This research focuses on the X-ray structure of 4,6-dichloro-5-nitrobenzofuroxan 1 and of some of its amino derivatives (4a, 4e, 4g, and 4l) and on DFT calculations concerning the nucleophilic reactivity of 1. We have found that by changing the solvent used for crystallization, it is possible to obtain 4,6-dichloro-5-nitrobenzofuroxan (1) in different polymorphic structures. Moreover, the different torsional angles observed for the nitro group in 1 and in its amino derivatives (4a, 4e, 4g, and 4l) are strictly dependent on the steric hindrance of the substituent at C-4. DFT calculations on the course of the nucleophilic substitution confirm the role of the condensed furoxan ring in altering the aromaticity of the carbocyclic frame, while chlorine atoms strongly influence the dihedral angle and the rotational barrier of the nitro group. These results corroborate previous observations based on experimental kinetic data and give a deep picture of the reaction with amines, which proceeds via a "non-aromatic" nucleophilic substitution.
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Affiliation(s)
- Elena Chugunova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov st. 8, 420088 Kazan, Russia; (A.D.); (A.B.)
- Laboratory of Plant Infectious Diseases, FRC Kazan Scientific Center of Russian Academy of Sciences, Lobachevskogo st. 2/31, 420111 Kazan, Russia
| | - Nurgali Akylbekov
- Laboratory of Engineering Profile “Physical and Chemical Methods of Analysis”, Korkyt Ata Kyzylorda University, Aitekebie str. 29A, Kyzylorda 120014, Kazakhstan;
| | - Alexey Dobrynin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov st. 8, 420088 Kazan, Russia; (A.D.); (A.B.)
- Institute of Radio Electronics, Photonics and Digital Technologies, Kazan National Research Technical University, 10 Karl Marx Str., 420111 Kazan, Russia
| | - Alexander Burilov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Akad. Arbuzov st. 8, 420088 Kazan, Russia; (A.D.); (A.B.)
- Laboratory of Plant Infectious Diseases, FRC Kazan Scientific Center of Russian Academy of Sciences, Lobachevskogo st. 2/31, 420111 Kazan, Russia
| | - Carla Boga
- Department of Industrial Chemistry ‘Toso Montanari’ ALMA MATER STUDIORUM, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy;
| | - Gabriele Micheletti
- Department of Industrial Chemistry ‘Toso Montanari’ ALMA MATER STUDIORUM, Università di Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy;
| | - Vincenzo Frenna
- Department STEBICEF, University of Palermo, Ed.17, Viale delle Scienze, 90128 Palermo, Italy;
| | - Edoardo Jun Mattioli
- Department of Chemistry ‘G. Ciamician’ ALMA MATER STUDIORUM, Università di Bologna, Via Selmi 2, 40126 Bologna, Italy; (E.J.M.); (M.C.)
| | - Matteo Calvaresi
- Department of Chemistry ‘G. Ciamician’ ALMA MATER STUDIORUM, Università di Bologna, Via Selmi 2, 40126 Bologna, Italy; (E.J.M.); (M.C.)
| | - Domenico Spinelli
- Department of Chemistry ‘G. Ciamician’ ALMA MATER STUDIORUM, Università di Bologna, Via Selmi 2, 40126 Bologna, Italy; (E.J.M.); (M.C.)
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Rakib EM, Boga C, Calvaresi M, Chigr M, Franchi P, Gualandi I, Ihammi A, Lucarini M, Micheletti G, Spinelli D, Tonelli D. A multidisciplinary study of chemico-physical properties of different classes of 2-aryl-5(or 6)-nitrobenzimidazoles: NMR, electrochemical behavior, ESR, and DFT calculations. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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6
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Marullo S, D'Anna F. Interplay of Acidity and Ionic Liquid Structure on the Outcome of a Heterocyclic Rearrangement Reaction. J Org Chem 2021; 86:4045-4052. [PMID: 33596066 DOI: 10.1021/acs.joc.0c02707] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The study of suitable probe reactions is a powerful tool to investigate the properties of nonconventional solvents such ionic liquids (ILs). In particular, we studied the acid-catalyzed mononuclear rearrangement of heterocycles (MHR) of the Z-phenylhydrazone of 5-amino-3-benzoyl-1,2,4-oxadiazole into the relevant 1,2,3-triazole, in solution of ILs by means of kinetic measurements. We chose as solvents six ILs differing both in the cation and anion, in the presence of five carboxylic and sulfonic acids as catalysts. For a useful comparison, the reaction was also performed in 1,4-dioxane and methanol. In general, the reaction occurs faster in ILs, compared to conventional solvents, according to the weaker solvation interactions operating in the former media. The effect of IL anion and cation on the reactivity and on the acidic strength of the catalysts was analyzed. To this aim, we measured the acidic strength of the sulfonic acids in each IL, estimated by the equilibrium formation constant of each acid with 4-nitroaniline. We found that the trend of reactivity as a function of the IL anion mainly reflects the larger difference in acidic strengths of the catalyst. Conversely, acidic strength spans a narrower range as a function of the IL cation. As a result, other factors come into play, such as the π-π interactions involving aromatic IL cations, substrate, and transition states, leading to a more articulate trend.
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Affiliation(s)
- Salvatore Marullo
- Dipartimento di Scienze Biologiche, Chimiche e Farmaceutiche, Sezione di Chimica, Viale delle Scienze, Università degli Studi di Palermo, 90128 Palermo, Italy
| | - Francesca D'Anna
- Dipartimento di Scienze Biologiche, Chimiche e Farmaceutiche, Sezione di Chimica, Viale delle Scienze, Università degli Studi di Palermo, 90128 Palermo, Italy
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Frenna V, Lo Meo P, Palumbo Piccionello A, Spinelli D. Unexpected Substituent Effects in the Iso-Heterocyclic Boulton-Katritzky Rearrangement of 3-Aroylamino-5-methyl-1,2,4-oxadiazoles: A Mechanistic Study. J Phys Chem A 2019; 123:10004-10010. [PMID: 31619037 DOI: 10.1021/acs.jpca.9b08675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The kinetics of the iso-heterocyclic mononuclear rearrangement of some 3-aroylamino-5-methyl-1,2,4-ozadiazoles was carefully examined under largely variable acidic or alkaline conditions. This reaction may proceed via two different mechanistic pathways (an uncatalyzed and a base-catalyzed one), as accounted for also by the evaluation of the relevant activation parameters. Substituent effects, as quantified by means of the Hammett's equation, appear relatively modest; however, they reveal some interesting anomalies, which enabled us to draw a very precise picture of the intimate reaction course.
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Affiliation(s)
- Vincenzo Frenna
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) , Università degli Studi di Palermo , V.le delle Scienze pad. 17 , 90128 Palermo , Italy
| | - Paolo Lo Meo
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) , Università degli Studi di Palermo , V.le delle Scienze pad. 17 , 90128 Palermo , Italy
| | - Antonio Palumbo Piccionello
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) , Università degli Studi di Palermo , V.le delle Scienze pad. 17 , 90128 Palermo , Italy
| | - Domenico Spinelli
- Department of Chemistry "G. Ciamician" , Alma Mater Studiorum, Università di Bologna , Via Selmi 2 , 40126 Bologna , Italy
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Sandford C, Fries LR, Ball TE, Minteer SD, Sigman MS. Mechanistic Studies into the Oxidative Addition of Co(I) Complexes: Combining Electroanalytical Techniques with Parameterization. J Am Chem Soc 2019; 141:18877-18889. [DOI: 10.1021/jacs.9b10771] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Christopher Sandford
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Lydia R. Fries
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Tyler E. Ball
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Shelley D. Minteer
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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Sirakanyan SN, Spinelli D, Geronikaki A, Hakobyan EK, Hovakimyan AA. New heterocyclic systems: Pyrido[2′,3′:5,4]thieno(furo)[3,2- d]oxazines as intermediate compounds for the synthesis of substituted pyrido[3′,2′:4,5]thieno(furo)[3,2- d]pyrimidines. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1644656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Samvel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A. L. Mnjoyan, Yerevan, Armenia
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Athina Geronikaki
- School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Elmira K. Hakobyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A. L. Mnjoyan, Yerevan, Armenia
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A. L. Mnjoyan, Yerevan, Armenia
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Kotagiri R, Deng Z, Xu W, Cai Q. Stereospecific Synthesis of ( E)-5-Tetrasubstituted-ylidene-3,5-dihydro-4 H-imidazol-4-ones. Org Lett 2019; 21:3946-3949. [PMID: 31140817 DOI: 10.1021/acs.orglett.9b01063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A stereospecific synthesis of ( E)-5-tetrasubstituted-ylidene-3,5-dihydro-4 H-imidazol-4-one derivatives is demonstrated through a cascade process by combination of a Michael addition and Boulton-Katritzky rearrangement. The method provides a simple and efficient approach for the synthesis of ( E)-5-tetrasubstituted-ylidene-3,5-dihydro-4 H-imidazol-4-ones from the reactions of N-(isoxazol-3-yl)-propiolamides or N-(1,2,4-oxadiazo-3-yl) propiolamides with N or C nucleophiles.
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Affiliation(s)
- Rajendraprasad Kotagiri
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education, College of Pharmacy , Jinan University , No 601 Huangpu Avenue West , Guangzhou 510632 , China
| | - Zhuoji Deng
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education, College of Pharmacy , Jinan University , No 601 Huangpu Avenue West , Guangzhou 510632 , China
| | - Wei Xu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education, College of Pharmacy , Jinan University , No 601 Huangpu Avenue West , Guangzhou 510632 , China
| | - Qian Cai
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education, College of Pharmacy , Jinan University , No 601 Huangpu Avenue West , Guangzhou 510632 , China
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Micheletti G, Frenna V, Macaluso G, Boga C, Spinelli D. Mononuclear Rearrangement of the Z-Phenylhydrazones of Some 3-Acyl-1,2,4-oxadiazoles: Effect of Substituents on the Nucleophilic Character of the >C═N-NH-C 6 H 5 Chain and on the Charge Density of N-2 of the 1,2,4-Oxadiazole Ring (Electrophilic Counterpart). J Org Chem 2019; 84:2462-2469. [PMID: 30695638 DOI: 10.1021/acs.joc.8b02305] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction rates for the mononuclear rearrangement of the Z-phenylhydrazones of 3-acyl-1,2,4-oxadiazoles 3a-c into the relevant 2-phenyl-2 H-1,2,3-triazoles (4a-c) have been measured in dioxane/water at different temperatures in a large range of proton concentrations. The occurrence of two different reaction pathways (one uncatalyzed, water assisted, and the other general base catalyzed) has- been observed. The obtained results have been able to furnish information about the effects of the nature of the 3-acyl structure and of the 5-substituents in the 1,2,4-oxadiazole ring on the reactivity of the examined rearrangements: they are well in line with the previsions carried out considering some our previous computational results as well as experimental kinetic ones.
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Affiliation(s)
- Gabriele Micheletti
- Department of Industrial Chemistry "Toso Montanari" ALMA MATER STUDIORUM , Università di Bologna , Viale del Risorgimento 4 , 40136 Bologna , Italy
| | - Vincenzo Frenna
- Department STEMBIO , Università di Palermo , Viale delle Scienze-Parco d'Orleans II , 90128 Palermo , Italy
| | - Gabriella Macaluso
- Department STEMBIO , Università di Palermo , Viale delle Scienze-Parco d'Orleans II , 90128 Palermo , Italy
| | - Carla Boga
- Department of Industrial Chemistry "Toso Montanari" ALMA MATER STUDIORUM , Università di Bologna , Viale del Risorgimento 4 , 40136 Bologna , Italy
| | - Domenico Spinelli
- Department of Chemistry 'G. Ciamician' ALMA MATER STUDIORUM , Università di Bologna , Via Selmi 2 , 40126 Bologna , Italy
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Liu J, Chen C, Kotagiri R, Yang W, Cai Q. A Simple Transformation of 1‐(Isoxazol‐3‐yl)ureas to 5‐(2‐oxoalkyl)‐2,4‐dihydro‐3H‐1,2,4‐triazol‐3‐ones through Base‐Promoted Boulton‐Katritzky Rearrangement. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jisheng Liu
- College of PharmacyJinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
- Guangzhou City Key Laboratory of Precision Chemical Drug Development
| | - Chen Chen
- College of PharmacyJinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
- Guangzhou City Key Laboratory of Precision Chemical Drug Development
| | - Rajendraprasad Kotagiri
- College of PharmacyJinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
| | - Wenqiang Yang
- College of PharmacyLinyi University Shuangling Road Linyi 276000 People's Republic of China
| | - Qian Cai
- College of PharmacyJinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
- Guangzhou City Key Laboratory of Precision Chemical Drug Development
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On the rearrangement of some Z -arylhydrazones of 3-benzoyl-5-phenylisoxazoles into 2-aryl-4-phenacyl-2 H -1,2,3-triazoles: a kinetic study of the substituent effects in Boulton–Katritzky reactions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Frenna V, Palumbo Piccionello A, Cosimelli B, Ghelfi F, Spinelli D. The Boulton-Katritzky Reaction: A Kinetic Study of the Effect of 5-Nitrogen Substituents on the Rearrangement of Some (Z)-Phenylhydrazones of 3-Benzoyl-1,2,4-oxadiazoles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402569] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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15
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Elucidating chemical reactivity and transition state of mononuclear rearrangement of heterocycles through the use of compartimentalized micellar media. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2013.11.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Palumbo Piccionello A, Guarcello A, Pace A, Buscemi S. Synthesis of Isoxazoline Derivatives through Boulton-Katritzky Rearrangement of 1,2,4-Oxadiazoles. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201308] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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D'Auria M, Frenna V, Marullo S, Racioppi R, Spinelli D, Viggiani L. Photochemical isomerization of aryl hydrazones of 1,2,4-oxadiazole derivatives into the corresponding triazoles. Photochem Photobiol Sci 2012; 11:1383-8. [DOI: 10.1039/c2pp25073j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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18
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D’Anna F, Frenna V, Ghelfi F, Marullo S, Spinelli D. Acid- and Base-Catalysis in the Mononuclear Rearrangement of Some (Z)-Arylhydrazones of 5-Amino-3-benzoyl-1,2,4-oxadiazole in Toluene: Effect of Substituents on the Course of Reaction. J Org Chem 2011; 76:2672-9. [DOI: 10.1021/jo200066n] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Francesca D’Anna
- Dipartimento STEMBIO, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy
| | - Vincenzo Frenna
- Dipartimento STEMBIO, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy
| | - Franco Ghelfi
- Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Via Campi 183, 41125 Modena, Italy
| | - Salvatore Marullo
- Dipartimento STEMBIO, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy
| | - Domenico Spinelli
- Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
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Martorana A, Piccionello AP, Buscemi S, Giorgi G, Pace A. Synthesis of 4(5)-phenacyl-imidazoles from isoxazole side-chain rearrangements. Org Biomol Chem 2011; 9:491-6. [DOI: 10.1039/c0ob00511h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Piccionello AP, Buscemi S, Vivona N, Pace A. Exploiting the CNC side chain in heterocyclic rearrangements: synthesis of 4(5)-acylamino-imidazoles. Org Lett 2010; 12:3491-3. [PMID: 20614866 DOI: 10.1021/ol1013087] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new variation on the Boulton-Katritzky reaction is reported, namely, involving use of a CNC side chain. A novel Montmorillonite-K10 catalyzed nonreductive transamination of a 3-benzoyl-1,2,4-oxadiazole afforded a 3-(alpha-aminobenzyl)-1,2,4-oxadiazole, which was condensed with benzaldehydes to afford the corresponding imines. In the presence of strong base, these imines underwent Boulton-Katritzky-type rearrangement to afford novel 4(5)-acylaminoimidazoles.
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Affiliation(s)
- Antonio Palumbo Piccionello
- Dipartimento di Chimica Organica E. Paternò, Università degli Studi di Palermo, Viale delle Scienze-Parco d'Orleans II, I-90128 Palermo, Italy.
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D’Anna F, Frenna V, Ghelfi F, Macaluso G, Marullo S, Spinelli D. Apolar versus Polar Solvents: A Comparison of the Strength of Some Organic Acids against Different Bases in Toluene and in Water. J Phys Chem A 2010; 114:10969-74. [DOI: 10.1021/jp107058x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francesca D’Anna
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy, Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Organic Chemistry, Via Campi 183, 41100 Modena, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Vincenzo Frenna
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy, Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Organic Chemistry, Via Campi 183, 41100 Modena, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Franco Ghelfi
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy, Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Organic Chemistry, Via Campi 183, 41100 Modena, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Gabriella Macaluso
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy, Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Organic Chemistry, Via Campi 183, 41100 Modena, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Salvatore Marullo
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy, Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Organic Chemistry, Via Campi 183, 41100 Modena, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Domenico Spinelli
- Dipartimento di Chimica Organica “E. Paternò”, Università degli Studi di Palermo, Viale delle Scienze-Parco d’Orleans II, 90128 Palermo, Italy, Dipartimento di Chimica, Università degli Studi di Modena e Reggio Emilia, Organic Chemistry, Via Campi 183, 41100 Modena, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
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D’Anna F, Frenna V, Lanza CZ, Macaluso G, Marullo S, Spinelli D, Spisani R, Petrillo G. On the use of multi-parameter free energy relationships: the rearrangement of (Z)-arylhydrazones of 5-amino-3-benzoyl-1,2,4-oxadiazole into (2-aryl-5-phenyl-2H-1,2,3-triazol-4-yl)ureas. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.05.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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D'Anna F, Fontana G, Frenna V, Macaluso G, Marullo S, Spinelli D. A deep insight into the mechanism of the acid-catalyzed rearrangement of the Z-phenylhydrazone of 5-amino-3-benzoyl-1,2,4-oxadiazole in a non-polar solvent. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1675] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Piccionello AP, Pace A, Buscemi S, Vivona N. 1,2,4-Oxadiazole rearrangements involving an NNC side-chain sequence. Org Lett 2009; 11:4018-20. [PMID: 19708710 DOI: 10.1021/ol901687n] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The thermal rearrangement of N-1,2,4-oxadiazol-3-yl-hydrazones into 1,2,4-triazole derivatives is reported. This represents the first example of a three-atom side-chain rearrangement involving an NNC sequence linked at the C(3) of the oxadiazole. The reactions carried out under solvent-free conditions produced good to high yields of the final products.
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Affiliation(s)
- Antonio Palumbo Piccionello
- Dipartimento di Chimica Organica E. Paternò, Università degli Studi di Palermo,Viale delle Scienze - Parco d'Orleans II, I-90128 Palermo, Italy.
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Mugnoli A, Barone G, Buscemi S, Lanza CZ, Pace A, Pani M, Spinelli D. On the structure of 3-acetylamino-5-methyl-1,2,4-oxadiazole and on the fully degenerate rearrangements (FDR) of its anion: a stimulating comparison between the results of ‘in-silicon chemistry’ and ‘laboratory chemistry’. J PHYS ORG CHEM 2009. [DOI: 10.1002/poc.1563] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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D'Anna F, Frenna V, Marullo S, Noto R, Spinelli D. Mononuclear rearrangement of heterocycles in ionic liquids catalyzed by copper(II) salts. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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D'Anna F, Frenna V, Guernelli S, Macaluso G, Marullo S, Spinelli D. Isomerization and rearrangement of (E
)- and (Z
)-phenylhydrazones of 3-benzoyl-5-phenyl-1,2,4-oxadiazole: evidence for a ‘new’ type of acid-catalysis by copper(II) salts in mononuclear rearrangement of heterocycles. J PHYS ORG CHEM 2008. [DOI: 10.1002/poc.1327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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On the characterization of some [bmim][X]/co-solvent binary mixtures: a multidisciplinary approach by using kinetic, spectrophotometric and conductometric investigations. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.033] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Chapter 5.4 Five membered ring systems: with more than one N atom. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/s0959-6380(08)80010-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
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30
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Fontana A, Guernelli S, Lo Meo P, Mezzina E, Morganti S, Noto R, Rizzato E, Spinelli D, Zappacosta R. On the behaviour of the (Z)-phenylhydrazones of some 5-alkyl-3-benzoyl-1,2,4-oxadiazoles in solution and in the gas phase: kinetic and spectrometric evidence in favour of self-assembly. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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31
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Mononuclear rearrangements of heterocycles in water/β-CD: information on the real site of reaction from structural modifications of substrates and from proton concentration dependence of the reactivity. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.084] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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