1
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To TA, Phan NTA, Mai BK, Nguyen TV. Controlling the regioselectivity of the bromolactonization reaction in HFIP. Chem Sci 2024; 15:7187-7197. [PMID: 38756818 PMCID: PMC11095382 DOI: 10.1039/d4sc01503g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 04/09/2024] [Indexed: 05/18/2024] Open
Abstract
The halolactonization reaction provides rapid access to densely functionalized lactones from unsaturated carboxylic acids. The endo/exo regioselectivity of this cyclization reaction is primarily determined by the electronic stabilization of alkene substituents, thus making it inherently dependent on substrate structures. Therefore this method often affords one type of halolactone regioisomer only. Herein, we introduce a simple and efficient method for regioselectivity-switchable bromolactonization reactions mediated by HFIP solvent. Two sets of reaction conditions were developed, each forming endo-products or exo-products in excellent regioselectivity. A combination of computational and experimental mechanistic studies not only confirmed the crucial role of HFIP, but also revealed the formation of endo-products under kinetic control and exo-products under thermodynamic control. This study paves the way for future work on the use of perfluorinated solvents to dictate reaction outcomes in organic synthesis.
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Affiliation(s)
- Tuong Anh To
- School of Chemistry, University of New South Wales Sydney NSW 2052 Australia
| | - Nhu T A Phan
- School of Chemistry, University of New South Wales Sydney NSW 2052 Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh Pennsylvania 15260 USA
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales Sydney NSW 2052 Australia
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2
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Brydon SC, Thomson C, O'Hair RAJ, White JM. Electronic and Steric Effects on the Reactivity of Seleniranium Ions with Alkenes in the Gas Phase. J Org Chem 2023; 88:9629-9644. [PMID: 36705983 DOI: 10.1021/acs.joc.2c02233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Gas phase ion-molecule reactions between seleniranium ions, R-c-SeCH2CH2+, and cis-cyclooctene were used to probe electronic and steric effects of substituents on kinetics and branching ratios. The second-order rate coefficients increased in the order p-OMeC6H4 < C6H5 < p-BrC6H4 < p-CF3C6H4 < m-NO2C6H4, giving a Hammett plot with R2 = 0.98 and ρ = +1.66. The two main pathways include direct transfer of the selenium moiety to the incoming alkene (π-ligand exchange) and the less favored ring-opening by attack at an iranium carbon to give a cis-bicyclic selenonium ion as supported by density functional theory (DFT) calculations. Branching ratios of each pathway indicated that electron-withdrawing groups directed more attack at carbon than selenium in agreement with previous solution-phase results. Increased steric bulk on selenium was investigated by changing the R group from a methyl to t-butyl, which not only shut down π-ligand exchange but also significantly reduced the overall reactivity. Finally, the reactivity of the iranium ion derived from Se-methylselenocysteine was investigated and shown to react faster and favor π-ligand exchange as the leaving group was changed from ethene to acrylic acid.
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Affiliation(s)
- Samuel C Brydon
- School of Chemistry and Bio21 Institute, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Catriona Thomson
- School of Chemistry and Bio21 Institute, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Richard A J O'Hair
- School of Chemistry and Bio21 Institute, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Jonathan M White
- School of Chemistry and Bio21 Institute, The University of Melbourne, Parkville, VIC 3010, Australia
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3
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Wu JQ, Wu XY, Lu JM, Shi Q, Shao LX. Highly Active La(III)-Based Metal-Organic Framework as a Heterogeneous Lewis Acid Catalyst for Friedel-Crafts Alkylation. Chemistry 2022; 28:e202202441. [PMID: 36082763 DOI: 10.1002/chem.202202441] [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: 08/05/2022] [Indexed: 12/14/2022]
Abstract
In this study, a novel La(III)-based two-dimensional (2D) metal-organic framework, [La2/3 (qptca)1/2 ] (referred to as SLX-2), from LaCl3 and 1,1' : 4',1'' : 4'',1''' : 4''',1''''-quinquephenyl]-2,2'',2'''',5''-tetracarboxylic acid (H4 qptca) was synthesized by conventional solvothermal method and thoroughly characterized by using X-ray single-crystal diffraction, powder X-ray diffraction, and thermogravimetric analyses. The 2D SLX-2 features a unique lanthanum center exposed to the skeleton and was used as an efficient Lewis acid catalyst for the Friedel-Crafts alkylation of indole and pyrrole with β-nitrostyrene along with a wide substrate scope, giving the desired products in good-to-high yields under the optimal reaction conditions. Furthermore, the catalyst was used for twenty cycles, with nearly no effect on its activity, and the reaction was heterogeneous in nature. Moreover, compared to the previous hydrogen-bond-donating MOF catalysts for such alkylation reactions, SLX-2 showed an excellent stability toward harsh acidic and basic environment, and gave comparable catalytic activities.
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Affiliation(s)
- Jia-Qi Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province, 325035, People's Republic of China
| | - Xin-Yuan Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province, 325035, People's Republic of China
| | - Jian-Mei Lu
- College of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province, 325035, People's Republic of China
| | - Qian Shi
- College of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province, 325035, People's Republic of China
| | - Li-Xiong Shao
- College of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province, 325035, People's Republic of China
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4
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Huo CY, Zheng TL, Dai WH, Zhang ZH, Wang JD, Zhu DY, Wang SH, Zhang XM, Xu XT. InI 3-catalyzed polyene cyclization of allenes and its application in the total synthesis of seven abietane-type diterpenoids. Chem Sci 2022; 13:13893-13897. [PMID: 36544726 PMCID: PMC9710309 DOI: 10.1039/d2sc04229k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022] Open
Abstract
A novel polyene cyclization using the allene group as the initiator has been successfully developed. This methodology provides an efficient strategy for the construction of an abietane-type tricyclic skeleton with a functionalizable C2-C3 double bond and features a wide substrate scope and excellent stereoselectivities. Potential utility of this approach has been well demonstrated by the collective total synthesis of seven abietane-type diterpenoids. Specifically, (±)-2,3-dihydroxyferruginol and (±)-2,3-dihydroxy-15,16-dinor-ent-pimar-8,11,13-triene were synthesized for the first time.
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Affiliation(s)
- Chen-Yu Huo
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Tian-Lu Zheng
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Wei-Hao Dai
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Zi-Hao Zhang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Jin-Da Wang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Dao-Yong Zhu
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China,Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan UniversityChengdu610041P. R. China
| | - Shao-Hua Wang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Xiao-Ming Zhang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University730000P. R. China
| | - Xue-Tao Xu
- School of Biotechnology and Health Science, Wuyi UniversityJiangmen 529020P. R. China
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5
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Rozentsveig IB, Nikonova VS, Manuilov VV, Ushakov IA, Borodina TN, Smirnov VI, Korchevin NA. Heterocyclization of Bis(2-chloroprop-2-en-1-yl)sulfide in Hydrazine Hydrate–KOH: Synthesis of Thiophene and Pyrrole Derivatives. Molecules 2022; 27:molecules27206785. [PMID: 36296380 PMCID: PMC9609936 DOI: 10.3390/molecules27206785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/03/2022] [Accepted: 10/05/2022] [Indexed: 11/30/2022] Open
Abstract
The article is devoted to heterocyclization of bis(2-chloroprop-2-en-1-yl)sulfide which proceeds in hydrazine hydrate–alkali medium and leads to formation of thiophene and pyrrole derivatives: previously described 4,5,9,10-tetrahydrocycloocta[1,2-c;5,8-c’]dithiophene, as well as unknown hydrazone of 5-methylidene-3-methyldihydrothiophen-2-one and 1-amino-2-(propynylsulfanylpropenylsulfanyl)-3,5-dimethylpyrrole. Tentative mechanisms for the formation of the heterocyclic products are discussed. Obtained hydrazone of 5-methylidene-3-methyldihydrothiophen-2-one was used for the synthesis of a range of azine derivatives and in oxidation process with SeO2. The found reactions open up expedient approaches to the formation of various hardly accessible thiophene and pyrrole compounds from 2,3-dichloropropene and elemental sulfur as starting reagents.
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Affiliation(s)
- Igor B. Rozentsveig
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
- Chemistry Department, Irkutsk State University, Karl Marx Str., 1, 664003 Irkutsk, Russia
- Correspondence:
| | - Valentina S. Nikonova
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
| | - Victor V. Manuilov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
| | - Igor A. Ushakov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
| | - Tatyana N. Borodina
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
| | - Vladimir I. Smirnov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
| | - Nikolay A. Korchevin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., 664033 Irkutsk, Russia
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6
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Liang Y, Jiao H, Zhang H, Wang YQ, Zhao X. Chiral Chalcogenide-Catalyzed Enantioselective Electrophilic Hydrothiolation of Alkenes. Org Lett 2022; 24:7210-7215. [PMID: 36154012 DOI: 10.1021/acs.orglett.2c03009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new strategy for the construction of chiral sulfides by catalytic enantioselective hydrothiolation of alkenes via an electrophilic pathway has been developed. Using this strategy, cyclic and acyclic unactivated alkenes efficiently afforded various chiral products in the presence of electrophilic sulfur reagents and silanes through chiral chalcogenide catalysis. The obtained products were easily transformed into other types of valuable chiral sulfur-containing compounds. Mechanistic studies revealed that the superior construction of chiral thiiranium ion intermediate is the key to achieving such a transformation.
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Affiliation(s)
- Yaoyu Liang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, Guangdong 510006, P. R. China
| | - Hui Jiao
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Hang Zhang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, Guangdong 510006, P. R. China
| | - You-Qing Wang
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, Guangdong 510006, P. R. China
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7
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Wei YF, Gao WC, Chang HH, Jiang X. Recent advances in thiolation via sulfur electrophiles. Org Chem Front 2022. [DOI: 10.1039/d2qo01447e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This review systematically summarizes the recent developments for constructing sulfur compounds from sulfur electrophiles, and the mechanism mainly involved thirranium ions, sulfur ylides, C–S cross coupling and electrophilic substitution.
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Affiliation(s)
- Ya-Feng Wei
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Wen-Chao Gao
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Hong-Hong Chang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Xuefeng Jiang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
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8
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Yan J, Zhou Z, He Q, Chen G, Wei H, Xie W. The applications of catalytic asymmetric halocyclization in natural product synthesis. Org Chem Front 2022. [DOI: 10.1039/d1qo01395e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Catalytic asymmetric halocyclization of olefinic substrate has evolved rapidly and been well utilized as a practical strategy for constructing enantioenriched cyclic skeletons in natural product synthesis.
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Affiliation(s)
- Jiahang Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Zhiqiang Zhou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Qiaoqiao He
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Guzhou Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
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9
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Shukla PM, Bhattacharya A, Pratap A, Pradhan A, Sinha P, Soni T, Maji B. HFIP-promoted halo-carbocyclizations of N- and O-tethered arene–alkene substrates to access all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman cores. Org Biomol Chem 2022; 20:8136-8144. [DOI: 10.1039/d2ob01597h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Herein, a HFIP-promoted mild and efficient method for the synthesis of all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman building blocks is disclosed.
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Affiliation(s)
- Pushpendra Mani Shukla
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Aditya Bhattacharya
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Aniruddh Pratap
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Akash Pradhan
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Puspita Sinha
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Tanishk Soni
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Biswajit Maji
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
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10
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Brydon SC, da Silva G, O'Hair RAJ, White JM. Experimental and theoretical investigations into the mechanisms of haliranium ion π-ligand exchange reactions with cyclic alkenes in the gas phase. Phys Chem Chem Phys 2021; 23:25572-25589. [PMID: 34783339 DOI: 10.1039/d1cp04494j] [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
Haliranium ions are intermediates often involved in complex cyclisations, where their structure allows for control over stereospecific outcomes. Extending previous studies into their structure and reactivity in the gas phase, this work focuses on the bimolecular reactivity of ethyl bromiranium and iodiranium ions with cyclic alkenes. The products observed via mass spectrometry were broadly attributed to either addition by cyclohexene at the iranium carbon or attack at the heteroatom to undergo associative π-ligand exchange. The model proposed was supported by both kinetic experiments and DFT calculations, where the rate of parent ion consumption proceeded at the collision rate (Br: k2 = 1.25 × 10-9 and I: k2 = 1.28 × 10-9 cm3 molecule-1 s-1) with the subsequent partitioning dependent on the relative stability of the initial intermediates and the relatively large barriers present in the addition pathway. Exploration of the effect of cycloalkene ring strain on the iodiranium ion reactivity was conducted with a series of crossover experiments with 50 : 50 mixtures of either cyclohexene or cis-cyclooctene and styrene, where the outcomes were dependent on the competing ring strain relief gained by reaction with each neutral. The nature of the exchange transition state was determined to be pseudocoarctate following both natural bond orbital (NBO) and anisotropy of the induced current density (ACID) analysis.
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Affiliation(s)
- Samuel C Brydon
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Gabriel da Silva
- Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Richard A J O'Hair
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Jonathan M White
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia.
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11
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Sorrentino JP, Altman RA. Fluorine-Retentive Strategies for the Functionalization of gem-Difluoroalkenes. SYNTHESIS-STUTTGART 2021; 53:3935-3950. [PMID: 34707322 DOI: 10.1055/a-1547-9270] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
gem-Difluoroalkenes are readily available fluorinated building blocks, and the fluorine-induced electronic perturbations of the alkenes enables a wide array of selective functionalization reactions. However, many reactions of gem-difluoroalkenes result in a net C─F functionalization to generate monofluorovinyl products or addition of F to generate trifluoromethyl-containing products. In contrast, fluorine-retentive strategies for the functionalization of gem-difluoroalkenes remain less generally developed, and is now becoming a rapidly developing area. This review will present the development of fluorine-retentive strategies including electrophilic, nucleophilic, radical, and transition metal catalytic strategies with an emphasis on key physical organic and mechanistic aspects that enable reactivities.
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Affiliation(s)
- Jacob P Sorrentino
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Ryan A Altman
- Department of Medicinal Chemistry and Molecular Pharmacology and Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
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12
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Bhattacharya A, mani Shukla P, Maji B. “Haliranium Ion”‐Induced Intermolecular Friedel‐Crafts Alkylation in HFIP: Synthesis of β,β‐Diaryl α‐Halo carbonyl Compounds. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Aditya Bhattacharya
- Department of Chemistry Indira Gandhi National Tribal University Amarkantak Anuppur-484886 India
| | - Pushpendra mani Shukla
- Department of Chemistry Indira Gandhi National Tribal University Amarkantak Anuppur-484886 India
| | - Biswajit Maji
- Department of Chemistry Indira Gandhi National Tribal University Amarkantak Anuppur-484886 India
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13
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Bhattacharya A, Shukla PM, Maji B. Highly Selective and Catalytic C-N Bond Cleavage of Tertiary Sulfonamides: Scope and Mechanistic Insight. ACS OMEGA 2021; 6:18988-19005. [PMID: 34337238 PMCID: PMC8320137 DOI: 10.1021/acsomega.1c02276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
A highly chemoselective C-N bond cleavage reaction of p-methoxybenzyl- (PMB), 3,4-dimethoxybenzyl- (DMB), or cinnamyl-substituted tertiary sulfonamides in the presence of catalytic Bi(OTf)3 is presented. A wide range of sulfonamide substrates smoothly furnished the corresponding C-N bond cleavage products in good to excellent yields. Great efforts have been made to obtain insights into the reaction mechanism based on a series of control experiments and mass spectroscopy.
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14
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Yang S, Park E, Kim J. Stereoselective Carbocyclization of Vinyloxiranes Catalyzed by Lewis Acids: Construction of the Musellarin Tricyclic Core. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sehui Yang
- Department of Chemistry Chonnam National University Gwangju 61186 Republic of Korea
| | - Euijin Park
- Department of Chemistry Chonnam National University Gwangju 61186 Republic of Korea
| | - Jimin Kim
- Department of Chemistry Chonnam National University Gwangju 61186 Republic of Korea
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15
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Zhang Y, Liang Y, Zhao X. Chiral Selenide-Catalyzed, Highly Regio- and Enantioselective Intermolecular Thioarylation of Alkenes with Phenols. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00296] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuanyuan Zhang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Yaoyu Liang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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16
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Bock J, Guria S, Wedek V, Hennecke U. Enantioselective Dihalogenation of Alkenes. Chemistry 2021; 27:4517-4530. [DOI: 10.1002/chem.202003176] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/01/2020] [Indexed: 01/17/2023]
Affiliation(s)
- Jonathan Bock
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
| | - Sudip Guria
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
| | - Volker Wedek
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
| | - Ulrich Hennecke
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
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17
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Brydon SC, Silva G, White JM. Evidence that π‐ligand exchange reactions of chalcogen iranium ions proceed via Hückel pseudocoarctate transition states. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Samuel C. Brydon
- School of Chemistry and Bio21 Institute The University of Melbourne Parkville Victoria Australia
| | - Gabriel Silva
- Chemical Engineering The University of Melbourne Parkville Victoria Australia
| | - Jonathan M. White
- School of Chemistry and Bio21 Institute The University of Melbourne Parkville Victoria Australia
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18
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MATSUMOTO K, SHIMAO H, FUJIKI Y, KAWASHITA N, KASHIMURA S. Electro-Generated Acids Catalyzed Epoxyolefin Cyclizations via Cationic Chain Reactions. ELECTROCHEMISTRY 2020. [DOI: 10.5796/electrochemistry.20-00032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Kouichi MATSUMOTO
- Department of Chemistry, School of Science and Engineering, Kindai University
| | - Hiroki SHIMAO
- Department of Chemistry, School of Science and Engineering, Kindai University
| | - Yuta FUJIKI
- Department of Chemistry, School of Science and Engineering, Kindai University
| | - Norihito KAWASHITA
- Department of Life Science, School of Science and Engineering, Kindai University
| | - Shigenori KASHIMURA
- Department of Chemistry, School of Science and Engineering, Kindai University
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19
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Cui B, Gao J, Fan L, Jiao Y, Lu T, Feng J. Dehydroxylated C-3 Alkylation of Indole Accompanied by 1,2-Sulfur Migration. J Org Chem 2020; 85:6206-6215. [DOI: 10.1021/acs.joc.0c00573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- BingBing Cui
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing 210009, P.R. China
| | - Jian Gao
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing 210009, P.R. China
| | - Lu Fan
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing 210009, P.R. China
| | - Yu Jiao
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing 210009, P.R. China
| | - Tao Lu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing 210009, P.R. China
| | - Jie Feng
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing 210009, P.R. China
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20
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Li W, Zhou P, Li G, Lin L, Feng X. Catalytic Asymmetric Halohydroxylation of α,β‐Unsaturated Ketones with Water as the Nucleophile. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000080] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Weiwei Li
- Key Laboratory of Green Chemistry & TechnologyMinistry of EducationCollege of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Pengfei Zhou
- Key Laboratory of Green Chemistry & TechnologyMinistry of EducationCollege of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Gonglin Li
- Key Laboratory of Green Chemistry & TechnologyMinistry of EducationCollege of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Lili Lin
- Key Laboratory of Green Chemistry & TechnologyMinistry of EducationCollege of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & TechnologyMinistry of EducationCollege of ChemistrySichuan University Chengdu 610064 People's Republic of China
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