1
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Hamze C, Brossier J, Karaghiosoff K, Godineau E, Knochel P. Selective and Stepwise Functionalization of the Pyridazine Scaffold by Using Thio-Substituted Pyridazine Building Blocks. Chemistry 2023; 29:e202302156. [PMID: 37534401 DOI: 10.1002/chem.202302156] [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: 07/06/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 08/04/2023]
Abstract
We described a regioselective tri- and tetra-functionalization of the pyridazine scaffold using two readily available building blocks: 3-alkylthio-6-chloropyridazine and 3,4-bis(methylthio)-6-chloropyridazine by performing selective metalations with TMPMgCl ⋅ LiCl and catalyst-tuned cross-coupling reactions with arylzinc halides. Several of the resulting pyridazines were converted into more elaborated N-heterocycles such as thieno[2,3-c]pyridazines and 1H-pyrazolo[3,4-c]pyridazines.
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Affiliation(s)
- Clémence Hamze
- Department of Chemistry, Ludwig-Maximilians University, Butenandtstraße 5-13, Haus F, 81377, Munich, Germany
| | - Julie Brossier
- Department of Chemistry, Ludwig-Maximilians University, Butenandtstraße 5-13, Haus F, 81377, Munich, Germany
| | - Konstantin Karaghiosoff
- Department of Chemistry, Ludwig-Maximilians University, Butenandtstraße 5-13, Haus F, 81377, Munich, Germany
| | - Edouard Godineau
- Research & Development, Syngenta Crop Protection AG, Schaffhauserstrasse 101, 4332, Stein, Switzerland
| | - Paul Knochel
- Department of Chemistry, Ludwig-Maximilians University, Butenandtstraße 5-13, Haus F, 81377, Munich, Germany
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2
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Wun BJ, Hu YC, Chi CY, Chuang GJ. Photoinduced Decarbonylative Rearrangement of Diazabicyclo[2.2.2]Octenones: A Photochemical Approach of Diazabicyclo[4.1.0]heptene Skeleton from Masked o-Benzoquinone. J Org Chem 2023; 88:1235-1244. [PMID: 36606370 DOI: 10.1021/acs.joc.2c02373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a photoinduced decarbonylative rearrangement of diazabicyclo[2.2.2]octenone in the facile synthesis of a functionalized diazabicyclo[4.1.0]heptene skeleton, a unique derivative of the hydropyridazine type structure which could be found in a variety of biologically active natural products. The scope of functional group compatibility in the photoreaction was examined by taking advantage of the easy access of the heterobicyclo[2.2.2] structure from the Diels-Alder reaction of masked o-benzoquinones. 4-Phenyl-1,2,4-triazoline-3,5-dione served as the dienophile which provided the adjacent N-N unit in hexahydropyridazine-type products of subsequent photorearrangement.
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Affiliation(s)
- Bo-Jyun Wun
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
| | - Yung-Chen Hu
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
| | - Chu-Yun Chi
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
| | - Gary Jing Chuang
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
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3
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Alshubramy MA, Asem M, Abdel-Motaal M. Efficient Synthesis of New Fused Thiadiazines and Their Spectroscopic, In Silico Drug Likeness, and ADME Properties. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022040224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Sallam HH, Mohammed YHI, Al-Ostoot FH, M. A. S, Khanum SA. Synthesis, crystal structure characterization, DFT calculations, Hirshfeld surface analysis and 3D energy frameworks of triazole pyridazine derivatives: Theoretical and experimental studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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5
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Ryan RT, Havrylyuk D, Stevens KC, Moore LH, Parkin S, Blackburn JS, Heidary DK, Selegue JP, Glazer EC. Biological Investigations of Ru(II) Complexes With Diverse β-diketone Ligands. Eur J Inorg Chem 2021; 2021:3611-3621. [PMID: 34539235 PMCID: PMC8447810 DOI: 10.1002/ejic.202100468] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Indexed: 02/04/2023]
Abstract
The β-diketone scaffold is a commonly used synthetic intermediate, and is a functional group found in natural products such as curcuminoids. This core structure can also act as a chelating ligand for a variety of metals. In order to assess the potential of this scaffold for medicinal inorganic chemistry, seven different κ2-O,O'-chelating ligands were used to construct Ru(II) complexes with polypyridyl co-ligands, and their biological activity was evaluated. The complexes demonstrated promising structure-dependent cytotoxicity. Three complexes maintained high activity in a tumor spheroid model, and all complexes demonstrated low in vivo toxicity in a zebrafish model. From this series, the best compound exhibited a ~ 30-fold window between cytotoxicity in a 3-D tumor spheroid model and potential in vivo toxicity. These results suggest that κ2-O,O'-ligands can be incorporated into Ru(II)-polypyridyl complexes to create favorable candidates for future drug development.
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Affiliation(s)
- Raphael T Ryan
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
| | - Dmytro Havrylyuk
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
| | - Kimberly C Stevens
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
| | - L Henry Moore
- University of Kentucky, Department of Molecular and Cellular Biochemistry, University of Kentucky, 741 S. Limestone, Lexington, KY 40536, USA
| | - Sean Parkin
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
| | - Jessica S Blackburn
- University of Kentucky, Department of Molecular and Cellular Biochemistry, University of Kentucky, 741 S. Limestone, Lexington, KY 40536, USA
| | - David K Heidary
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
| | - John P Selegue
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
| | - Edith C Glazer
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA
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6
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Kodama T, Sasaki I, Sugimura H. Synthesis of Pyridazine Derivatives via Aza-Diels-Alder Reactions of 1,2,3-Triazine Derivatives and 1-Propynylamines. J Org Chem 2021; 86:8926-8932. [PMID: 34132555 DOI: 10.1021/acs.joc.1c00851] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly regioselective method was developed for the preparation of pyridazine derivatives via the aza-Diels-Alder reaction of 1,2,3-triazines with 1-propynylamines under neutral conditions. This methodology allowed direct access to a wide range of 6-aryl-pyridazin-3-amines in high yields with good functional group compatibility. Key features of this strategy included a broad substrate scope and simple, metal-free, and neutral reaction conditions.
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Affiliation(s)
- Takayuki Kodama
- Department of Chemistry and Bioscience, Faculty of Science and Technology, Aoyama Gakuin University, 5-10-1, Fuchinobe, Chuo-ku, Sagamihara 252-5258, Japan
| | - Ikuo Sasaki
- Department of Chemistry and Bioscience, Faculty of Science and Technology, Aoyama Gakuin University, 5-10-1, Fuchinobe, Chuo-ku, Sagamihara 252-5258, Japan
| | - Hideyuki Sugimura
- Department of Chemistry and Bioscience, Faculty of Science and Technology, Aoyama Gakuin University, 5-10-1, Fuchinobe, Chuo-ku, Sagamihara 252-5258, Japan
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7
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A One-Pot Approach to Novel Pyridazine C-Nucleosides. Molecules 2021; 26:molecules26082341. [PMID: 33920588 PMCID: PMC8074166 DOI: 10.3390/molecules26082341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/13/2021] [Accepted: 04/13/2021] [Indexed: 11/17/2022] Open
Abstract
The synthesis of glycosides and modified nucleosides represents a wide research field in organic chemistry. The classical methodology is based on coupling reactions between a glycosyl donor and an acceptor. An alternative strategy for new C-nucleosides is used in this approach, which consists of modifying a pre-existent furyl aglycone. This approach is applied to obtain novel pyridazine C-nucleosides starting with 2- and 3-(ribofuranosyl)furans. It is based on singlet oxygen [4+2] cycloaddition followed by reduction and hydrazine cyclization under neutral conditions. The mild three-step one-pot procedure leads stereoselectively to novel pyridazine C-nucleosides of pharmacological interest. The use of acetyls as protecting groups provides an elegant direct route to a deprotected new pyridazine C-nucleoside.
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8
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Gavelle S, Abid I, Biletskyi B, Henrion S, Hémon-Ribaud A, Lhoste J, Martel A, Dujardin G, Gaulon-Nourry C. TIPS-Diazoacetone Aldol Addition: Mechanistic Aspects and Contribution to the Synthesis. J Org Chem 2021; 86:4917-4931. [PMID: 33725439 DOI: 10.1021/acs.joc.0c02725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Aldol addition of α-triisopropylsilyl-α-diazoacetone (TIPS-diazoacetone), promoted by excess lithium diisopropylamide (LDA), was developed and applied to the synthesis of original C-TIPS diazoaldols, C-TIPS diazoketols, and a related Mannich-type product. An unprecedented mechanistic pathway has been proposed, involving a lithiated triazene intermediate resulting from the nucleophilic addition of LDA on the diazo moiety, supported by experimental results and DFT calculations.
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Affiliation(s)
- Sigrid Gavelle
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Imen Abid
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Bohdan Biletskyi
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Sylvain Henrion
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Annie Hémon-Ribaud
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Jérôme Lhoste
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Arnaud Martel
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Gilles Dujardin
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
| | - Catherine Gaulon-Nourry
- Institut des Molécules et Matériaux du Mans, IMMM UMR 6283 CNRS - Le Mans Université, Avenue Olivier Messiaen, 72085 CEDEX 9 Le Mans, France
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9
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Zanatta N, Marangoni MA, Moraes PA, Camargo AF, Bonacorso HG, Martins MAP. Synthesis of a Novel 1,4-Dicarbonyl Scaffold – Ethyl 3-Formyl-4,5-dihydrofuran-2-carboxylate – and Its Application to the Synthesis of Pyridazines. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0039-1690886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The 1,4-dicarbonyl scaffold ethyl 3-formyl-4,5-dihydrofuran-2-carboxylate was obtained through the rearrangement of the parent ethyl 2-(4,5-dihydrofuran-3-yl)-2-oxoacetate and applied to the synthesis of a series of 7-alkoxy-2,3-dihydrofuro[2,3-d]pyridazines. Twelve pyridazines were obtained in yields of up to 70%.
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Affiliation(s)
- Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
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10
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Ansari MA, Yadav D, Singh MS. Rhodium(II)-Catalyzed Annulative Coupling of β-Ketothioamides with α-Diazo Compounds: Access to Highly Functionalized Thiazolidin-4-ones and Thiazolines. J Org Chem 2020; 85:8320-8329. [DOI: 10.1021/acs.joc.0c00378] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Monish Arbaz Ansari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Dhananjay Yadav
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Maya Shankar Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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11
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Turkett JA, Ringuette AE, Lindsley CW, Bender AM. Synthesis of Substituted 6,7-Dihydro-5 H-pyrrolo[2,3- c]pyridazines/pyrazines via Catalyst-Free Tandem Hydroamination-Aromatic Substitution. J Org Chem 2020; 85:6123-6130. [PMID: 32227869 DOI: 10.1021/acs.joc.9b03463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report an efficient and operationally simple synthesis of 6,7-dihydro-5H-pyrrolo[2,3-c]pyridazines and 6,7-dihydro-5H-pyrrolo[2,3-b]pyrazines via a tandem hydroamination-SNAr sequence that makes use of mild reagents under catalyst-free conditions in moderate to high yields. This chemistry expands the known scope of pyridazine/pyrazine chemistry and can be applied toward the synthesis of novel drug-like molecules with favorable bioactivity and pharmacokinetic properties.
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12
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Sergeev PG, Nenajdenko VG. Recent advances in the chemistry of pyridazine — an important representative of six-membered nitrogen heterocycles. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4922] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Duan L, Wang X, Gu Y, Hou Y, Gong P. Regioselective construction of pyridazine and tetrahydrocinnoline derivatives via [4 + 2] cycloaddition–elimination with α-halogeno hydrazones and enaminones. Org Chem Front 2020. [DOI: 10.1039/d0qo00555j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Herein, we report the de novo construction of pyridazine scaffolds via a [4 + 2] cycloaddition–elimination reaction with α-halogeno hydrazones and enaminones.
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Affiliation(s)
- Liancheng Duan
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Xin Wang
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Yucheng Gu
- Syngenta Jealott's Hill International Research Center
- Berkshire RG42 6EY
- UK
| | - Yunlei Hou
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
| | - Ping Gong
- School of Pharmaceutical Engineering
- Shenyang Pharmaceutical University
- Shenyang
- China
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14
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Feng J, He T, Xie Y, Yu Y, Baell JB, Huang F. I 2-Promoted [4 + 2] cycloaddition of in situ generated azoalkenes with enaminones: facile and efficient synthesis of 1,4-dihydropyridazines and pyridazines. Org Biomol Chem 2020; 18:9483-9493. [PMID: 33179698 DOI: 10.1039/d0ob01958e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and efficient strategy for the synthesis of 1,4-dihydropyridazines and pyridazines through I2-promoted [4 + 2] cycloaddition of in situ generated azoalkenes with enaminones has been developed. The switch in selectivity is attributed to the judicious choice of different reaction temperatures. The key features of this work include controllable and selective synthesis, good functional group tolerance, good to excellent reaction yields, metal/base-free conditions, and also applicability to one-pot methodology.
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Affiliation(s)
- Jiajun Feng
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Tiantong He
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Yuxing Xie
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China. and Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China. and School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
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15
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Cheng B, Li Y, Li H, Zhang X, Wang T, Li Y, Zhai H. Switchable Ring-Contractive Extrusion Reactions of 2,5-Dihydro-1,4,5-thiadiazepine S-Oxides: Entries to Pyridazines or Pyrazoles. J Org Chem 2019; 85:1109-1114. [DOI: 10.1021/acs.joc.9b03003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Bin Cheng
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yuntong Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hui Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xinping Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Taimin Wang
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Yun Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hongbin Zhai
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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16
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Brandão P, Pineiro M, Pinho e Melo TMVD. Flow Chemistry: Towards A More Sustainable Heterocyclic Synthesis. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901335] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Pedro Brandão
- CQC and Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
- Centro de Química de Évora; Institute for Research and Advanced Studies; University of Évora; 7000 Évora Portugal
| | - Marta Pineiro
- CQC and Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
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17
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Wu Q, Shao PL, He Y. Synthesis of 1,4,5,6-tetrahydropyridazines and pyridazines via transition-metal-free (4 + 2) cycloaddition of alkoxyallenes with 1,2-diaza-1,3-dienes. RSC Adv 2019; 9:21507-21512. [PMID: 35521294 PMCID: PMC9066181 DOI: 10.1039/c9ra02712b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/04/2019] [Indexed: 12/19/2022] Open
Abstract
We developed an economical and practical protocol for the synthesis of 1,4,5,6-tetrahydropyridazines. A diverse range of alkoxyallenes and 1,2-diaza-1,3-dienes undergo (4 + 2) cycloaddition to generate the desired products in excellent yields. The high efficiency, wide substrate scope and good functional group tolerance of this process, coupled with operational simplicity, render the method synthetically attractive. The utility of the cycloaddition is also demonstrated by the preparation of various pyridazines from 1,4,5,6-tetrahydropyridazines. We developed an economical and practical protocol for the synthesis of 1,4,5,6-tetrahydropyridazines and pyridazines via cyclization of alkoxyallenes and 1,2-diaza-1,3-dienes.![]()
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Affiliation(s)
- Qi Wu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
- People's Republic of China
| | - Pan-Lin Shao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
- People's Republic of China
| | - Yun He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research
- School of Pharmaceutical Sciences
- Chongqing University
- Chongqing 401331
- People's Republic of China
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18
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Lou XH, Zhou QL, Liu WY, Hu XQ. Crystal structure of N-(4-methoxybenzyl)pyridazin-3-amine- a rare Z′ = 4 structure, C12H13N3O. Z KRIST-NEW CRYST ST 2018. [DOI: 10.1515/ncrs-2018-0212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractC12H13N3O, triclinic, P1̄ (no. 2), a = 10.2233(9) Å, b = 10.2902(9) Å, c = 24.2253(19) Å, α = 86.607(7)°, β = 88.529(7)°, γ = 62.515(9)°, V = 2256.9(4) Å3, Z = 8, Rgt(F) = 0.0425, wRref(F2) = 0.1239, T = 291(2) K.
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Affiliation(s)
- Xin-Hua Lou
- College of Food and Pharmacy, Luoyang Normal University, Luoyang 471022, China
| | - Qing-Li Zhou
- College of Food and Pharmacy, Luoyang Normal University, Luoyang 471022, China
| | - Wen-Yuan Liu
- College of Food and Pharmacy, Luoyang Normal University, Luoyang 471022, China
| | - Xue-Qing Hu
- College of Food and Pharmacy, Luoyang Normal University, Luoyang 471022, China
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19
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Bel Abed H, Weißing N, Schoene J, Paulus J, Sewald N, Nazaré M. Novel strategy for the preparation of 3-perfluoroalkylated-2H-indazole derivatives. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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20
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Du Q, Neudörfl JM, Schmalz HG. Chiral Phosphine-Phosphite Ligands in Asymmetric Gold Catalysis: Highly Enantioselective Synthesis of Furo[3,4-d
]-Tetrahydropyridazine Derivatives through [3+3]-Cycloaddition. Chemistry 2018; 24:2379-2383. [DOI: 10.1002/chem.201800042] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Qingwei Du
- Department of Chemistry; University of Cologne; Greinstr. 4, D- 50939 Köln Germany
| | - Jörg-Martin Neudörfl
- Department of Chemistry; University of Cologne; Greinstr. 4, D- 50939 Köln Germany
| | - Hans-Günther Schmalz
- Department of Chemistry; University of Cologne; Greinstr. 4, D- 50939 Köln Germany
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21
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Srinivasan R, Dey A, Nagarajan NS, Kumaran RS, Gandhi T, Maiti D. Pd-Catalyzed C-H arylation of pyridazine-based fused 1,2,4-triazoles: overriding selectivity at the usual position by undermining of preferred chelate formation. Chem Commun (Camb) 2017; 53:11709-11712. [PMID: 29022631 DOI: 10.1039/c7cc06226e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The applicability of C-H functionalization to medicinally important 2-pyridyl-based N-heterocycles suffers from severe challenges owing to the high Lewis basicity of the N-atom. This arrests catalytic activity and yields undesirable positional selectivity due to preferential chelate formation. In this regard, we report a novel palladium(ii)-catalyzed arylation strategy on multiple-N-containing pyridazines by over-riding the functionalization due to a chelated palladacycle. We report a regioselective mono-arylation at the 8-position of diphenyl azolopyridazines without any ortho-C-H activation on the proximal phenyl groups. This methodology presents a broad arylation scope with uncompromised yield and positional selectivity, including the heteroarylation of N-heterocycles, which is an unprecedented feat for these types of molecules.
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Affiliation(s)
- Ramasamy Srinivasan
- Dept. of Chem., Gandhigram Rural Institute - Deemed University, Gandhigram, 624302, India.
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22
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Schoene J, Bel Abed H, Christmann M, Nazaré M. A straightforward approach to N -substituted-2 H -indazol-2-amines through reductive cyclization. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Yuan J, Long X, Zhang C. Influence of N-Oxide Introduction on the Stability of Nitrogen-Rich Heteroaromatic Rings: A Quantum Chemical Study. J Phys Chem A 2016; 120:9446-9457. [DOI: 10.1021/acs.jpca.6b08852] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jia Yuan
- Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), P.O. Box 919-327, Mianyang, Sichuan 621900, China
| | - Xinping Long
- Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), P.O. Box 919-327, Mianyang, Sichuan 621900, China
| | - Chaoyang Zhang
- Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), P.O. Box 919-327, Mianyang, Sichuan 621900, China
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24
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Bel Abed H, Schoene J, Christmann M, Nazaré M. Organophosphorus-mediated N-N bond formation: facile access to 3-amino-2H-indazoles. Org Biomol Chem 2016; 14:8520-8. [PMID: 27541713 DOI: 10.1039/c6ob01544a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient and efficient strategy has been devised to access 3-amino-2H-indazole derivatives in two steps from readily available starting materials. The conversion of 2-nitrobenzonitriles to substituted benzamidines followed by an organophosphorus-mediated reductive cyclization and a subsequent N-N bond formation afforded 3-amino-2H-indazoles in good to excellent yields.
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Affiliation(s)
- Hassen Bel Abed
- Leibniz-Institut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Roessle-Str. 10, 13125 Berlin, Germany.
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25
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Shelke AM, Suryavanshi G. Fluoride-Assisted Synthesis of 1,4,5,6-Tetrahydropyridazines via [4 + 2] Cyclodimerization of in Situ-Generated Azoalkenes Followed by a C–N Bond Cleavage. Org Lett 2016; 18:3968-71. [DOI: 10.1021/acs.orglett.6b01551] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Anil M. Shelke
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
| | - Gurunath Suryavanshi
- Chemical Engineering & Process Development Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
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26
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Nikolaev VA, Cantillo D, Kappe CO, Medvedev JJ, Prakash GKS, Supurgibekov MB. Diazo Strategy for the Synthesis of Pyridazines: Pivotal Impact of the Configuration of the Diazo Precursor on the Process. Chemistry 2016; 22:174-84. [PMID: 26603264 DOI: 10.1002/chem.201503448] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Indexed: 11/11/2022]
Abstract
Phosphazenes of vinyldiazocarbonyl compounds having cis stereochemistry of the functional groups on the vinyl bond readily produce pyridazines by a diaza-Wittig process, whereas their counterparts with trans configuration remain intact under similar reaction conditions. Upon UV irradiation trans-phosphazenes furnish pyridazines through a tandem trans-to-cis isomerization followed by intramolecular cyclization. At elevated temperatures trans-(triphenyl)phosphazenes dissociate to give the initial vinyldiazo compounds, which produce pyrazoles in high yields. The first theoretical study on the mechanism of the diaza-Wittig process by DFT calculations at the M06-2X/6-31G(d) level of theory suggest that for the cis-phosphazenes a rapid tandem [2+2] cycloaddition/cycloelimination process with low energy barriers is preferred over trans isomers.
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Affiliation(s)
- Valerij A Nikolaev
- Department of Organic Chemistry, St-Petersburg State University, University pr. 26, 198504, Saint-Petersburg (Russia).
| | - David Cantillo
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz (Austria).
| | - C Oliver Kappe
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz (Austria)
| | - Jury J Medvedev
- Department of Organic Chemistry, St-Petersburg State University, University pr. 26, 198504, Saint-Petersburg (Russia)
| | - G K Surya Prakash
- University of Southern California, 837 Bloom Walk, Los Angeles, CA 90089-1661 (USA).
| | - Murat B Supurgibekov
- Department of Organic Chemistry, St-Petersburg State University, University pr. 26, 198504, Saint-Petersburg (Russia)
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27
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Komkov AV, Komendantova AS, Menchikov LG, Chernoburova EI, Volkova YA, Zavarzin IV. A Straightforward Approach toward Multifunctionalized Pyridazines via Imination/Electrocyclization. Org Lett 2015; 17:3734-7. [PMID: 26158207 DOI: 10.1021/acs.orglett.5b01718] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A facile synthesis of functionalized 3-carbamide pyridazines starting from readily available chlorovinyl aldehydes and oxamic acid thiohydrazides via cascade imination/electrocyclization is reported. In the presence of p-toluenesulfuric acid, various ketones have been efficiently incorporated into the pyridazine derivatives through a two-step sequence involving a Vilsmeier-Haack reaction and imination. The synthetic value of this method has been demonstrated by efficient synthesis of steroidal pyridazines.
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Affiliation(s)
- Alexander V Komkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russia
| | - Anna S Komendantova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russia
| | - Leonid G Menchikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russia
| | - Elena I Chernoburova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russia
| | - Yulia A Volkova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russia
| | - Igor V Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russia
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28
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Bel Abed H, Mammoliti O, Bande O, Van Lommen G, Herdewijn P. Organophosphorus-catalyzed diaza-Wittig reaction: application to the synthesis of pyridazines. Org Biomol Chem 2015; 12:7159-66. [PMID: 25101802 DOI: 10.1039/c4ob01201a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The elaboration of the first organophosphorus-catalyzed diaza-Wittig reaction is reported. This catalytic reaction is applied to the synthesis of substituted pyridazine and phthalazine derivatives bearing electron-withdrawing groups with good to excellent yields from substrates containing a diazo functionality as the starting material and a phospholene oxide as the catalyst.
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Affiliation(s)
- Hassen Bel Abed
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium.
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29
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Kao HC, Tang SW, Wang WJ. The First Triple-Stranded Helical Metallosupramolecule with Metal Cluster Core. J CHIN CHEM SOC-TAIP 2014. [DOI: 10.1002/jccs.201400397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Mboyi CD, Duhayon C, Canac Y, Chauvin R. From N-sulfonyl,C-homoallyl-hydrazones to pyrazole and pyridazine (N2)-heterocycles: the ultimate aromatization process. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.005] [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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31
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Li B, Li C. Neighboring heteroatom effect unique to aqueous aldol reactions of water-insoluble substrates. J Org Chem 2014; 79:2242-54. [PMID: 24533785 DOI: 10.1021/jo500213b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The reactions of ketones and aldehydes in the presence of Li(+) and in the presence or absence of PTC mediated by water were performed to produce aldol products. Several advantages of the aqueous reactions over organic solvent-mediated ones have been demonstrated including higher yields, shorter reaction times, simpler purifications, and better functional group tolerance. Some reactions that do not take place in organic solvents have been realized in water. The successes are attributed to the neighboring heteroatom effect. In the aqueous aldol condensations, Li2CO3 was an efficient catalyst, and therefore base-liable groups such as epoxides, esters, and silyl groups could survive. For heteroaromatic ethanones, the aqueous aldol reactions were accomplished without PTC to give β-hydroxyketones in good yields. The water-mediated condensations of aldosyl hemiacetals with aromatic ketones led to a new carbohydrate-derived skeleton in quantitative yields. To some extent, this research has expanded the applicablities of aldol condensations and reactions.
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Affiliation(s)
- Bo Li
- Department of Chemistry, School of Science, Tianjin University , Tianjin 300072, China
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32
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Patil P, Nimonkar A, Akamanchi KG. Aryl-Free Radical-Mediated Oxidative Arylation of Naphthoquinones Using o-Iodoxybenzoic Acid and Phenylhydrazines and Its Application toward the Synthesis of Benzocarbazoledione. J Org Chem 2014; 79:2331-6. [DOI: 10.1021/jo500131h] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pravin Patil
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Abhay Nimonkar
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Krishnacharya G. Akamanchi
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
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33
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Mao H, Lin A, Tang Z, Hu H, Zhu C, Cheng Y. Organocatalytic One-Pot Synthesis of Highly Substituted Pyridazines from Morita-Baylis-Hillman Carbonates and Diazo Compounds. Chemistry 2014; 20:2454-8. [DOI: 10.1002/chem.201304295] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Indexed: 01/19/2023]
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34
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Bel Abed H, Bande O, Mammoliti O, Van Lommen G, Herdewijn P. A novel and convenient strategy for the synthesis of phthalazines from an aryne precursor. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.10.075] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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