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Zhang P, Liu H, Xu S, He Y, He X, Sun B, Hu J. Direct Construction of 1,4-Dihydropyridazines and Parazoles via Annulation of Alkyl 2-Aroyl-1-chlorocyclopropanecarboxylates. J Org Chem 2024. [PMID: 38822472 DOI: 10.1021/acs.joc.4c00520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
An efficient and chemodivergent synthesis of highly functionalized 1,4-dihydropyridazines and parazoles has been accomplished via base-promoted annulation between hydrazones and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates, respectively. This transition-metal-free domino reaction proceeded rapidly under mild basic conditions, affording potentially bioactive 1,4-dihydropyridazine and parazole derivatives in moderate yields. The conversion of 1,4-dihydropyridazine to pyrazole was confirmed by adjusting the quantity of the base.
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Affiliation(s)
- Pengwei Zhang
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Huili Liu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Shuo Xu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Yiqun He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Xinhao He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Bing Sun
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Junhao Hu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
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2
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Wu Y, Wu X, Liu L, Yu JT, Pan C. Photocatalytic Carbosulfonylation/Cyclization of N-Homoallyl and N-Allyl Aldehyde Hydrazones toward Sulfonylated Tetrahydropyridazines and Dihydropyrazoles. Org Lett 2024; 26:122-126. [PMID: 38160407 DOI: 10.1021/acs.orglett.3c03733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
N'-Benzylidene-N-homoallylacetohydrazides were designed and synthesized as novel skeletons for the construction of functionalized tetrahydropyridazines. A series of aryl- and alkylsulfonylated tetrahydropyridazines were obtained in yields of up to 94% employing sulfonyl chlorides as the sulfonyl radical sources under visible-light irradiation. Besides, sulfonylated dihydropyrazoles were also produced from N-allyl-N'-benzylideneacetohydrazides. Mechanistic investigations indicated that both energy transfer and single electron transfer processes were involved in accomplishing the radical 6/5-endo-trig cyclization to the C═N bond.
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Affiliation(s)
- Yechun Wu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Xian Wu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Lingli Liu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Changduo Pan
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
- School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China
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3
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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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Chen XY, Zhang X, Wan JP. Recent advances in transition metal-free annulation toward heterocycle diversity based on the C-N bond cleavage of enaminone platform. Org Biomol Chem 2022; 20:2356-2369. [DOI: 10.1039/d2ob00126h] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enaminones and analogous stable enamines are well known as platform building blocks in organic synthesis for construction of heterocyclic compounds, especially N-heterocycles. To date, especially enaminones have been successfully...
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5
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Lv Y, Meng J, Li C, Wang X, Ye Y, Sun K. Update on the Synthesis of N‐Heterocycles via Cyclization of Hydrazones (2017–2021). Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101184] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering Anyang Normal University Anyang 4550008 People's Republic of China
| | - Jianping Meng
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Chen Li
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Xin Wang
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Yong Ye
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Kai Sun
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
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6
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Suresh S, Bhimrao Patil P, Yu P, Fang C, Weng Y, Kavala V, Yao C. A Study of the Reactions of 3‐Bromopropenals with Anilines for the Synthesis of α‐Bromo Enaminones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sundaram Suresh
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
| | - Prakash Bhimrao Patil
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
| | - Pao‐Hsing Yu
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
| | - Chia‐Chi Fang
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
| | - Yin‐Zhi Weng
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
| | - Veerababurao Kavala
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
| | - Ching‐Fa Yao
- Department of Chemistry National Taiwan Normal University 88, Sec. 4, Ting-Zhou Road Taipei Taiwan 116, R.O.C
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Aza-Diels-Alder reaction of both electron-deficient azoalkenes with electron-deficient 3-phencaylideneoxindoles and 3-aryliminooxindol-2-ones. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Mondal B, Maiti R, Yang X, Xu J, Tian W, Yan JL, Li X, Chi YR. Carbene-catalyzed enantioselective annulation of dinucleophilic hydrazones and bromoenals for access to aryl-dihydropyridazinones and related drugs. Chem Sci 2021; 12:8778-8783. [PMID: 34257877 PMCID: PMC8246082 DOI: 10.1039/d1sc01891d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/17/2021] [Indexed: 11/28/2022] Open
Abstract
4,5-Dihydropyridazinones bearing an aryl substituent at the C6-position are important motifs in drug molecules. Herein, we developed an efficient protocol to access aryl-dihydropyridazinone molecules via carbene-catalyzed asymmetric annulation between dinucleophilic arylidene hydrazones and bromoenals. Key steps in this reaction include polarity-inversion of aryl aldehyde-derived hydrazones followed by chemo-selective reaction with enal-derived α,β-unsaturated acyl azolium intermediates. The aryl-dihydropyridazinone products accessed by our protocol can be readily transformed into drugs and bioactive molecules. Polarity inversion of arylidene hydrazones to react with bromoenals via carbene organic catalysis is disclosed. The reaction enantioselectively affords 6-aryl-4,5-dihydropyridazinones and related drugs with proven commercial applications.![]()
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Affiliation(s)
- Bivas Mondal
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Rakesh Maiti
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Xing Yang
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China .,Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Weiyi Tian
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Jia-Lei Yan
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Xiangyang Li
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China .,Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
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9
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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: 9] [Impact Index Per Article: 2.3] [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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