1
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Chennamsetti H, Rathore KS, Chatterjee S, Mandal PK, Katukojvala S. Triple Nucleophilic Head-to-Tail Cascade Polycyclization of Diazodienals via Combination Catalysis: Direct Access to Cyclopentane Fused Aza-Polycycles with Six-Contiguous Stereocenters. JACS AU 2024; 4:2099-2107. [PMID: 38938806 PMCID: PMC11200238 DOI: 10.1021/jacsau.4c00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/15/2024] [Accepted: 04/15/2024] [Indexed: 06/29/2024]
Abstract
Reported herein are the bench stable (2E,4E)-diazohexa-2,4-dienals (diazodienals) and their unprecedented polycyclization with aldimine and arylamines enabled by Rh(II)/Brønsted acid relay catalysis. This scalable and atom-economical reaction provides direct access to the biologically important azatricyclo[6.2.1.04,11]undecane fused polycycles having six-contiguous stereocenters. Mechanistic studies revealed that polycyclization proceeds through an unusual triple-nucleophilic cascade initiated by aldimine attack on remote Rh-carbenoid, 6π-electrocyclization of aza-trienyl azomethine ylide, stereoselective aza-Michael addition via iminium activation, and inverse electron-demand intramolecular aza Diels-Alder reaction. The π-π secondary interactions play a crucial role in the preorganization of reactive intermediates for the pericyclic reactions and, hence, the overall efficiency of the polycyclization.
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Affiliation(s)
| | | | | | | | - Sreenivas Katukojvala
- Department of Chemistry, Indian
Institute of Science Education & Research
Bhopal, Bhopal, Madhya Pradesh 462066, India
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2
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Reddy CR, Kolgave DH, Fatima S, Ramesh R. Carbonylative cyclization of biaryl enones with aldehydes and oxamic acids. Org Biomol Chem 2024; 22:4901-4911. [PMID: 38832447 DOI: 10.1039/d4ob00513a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
An oxidative radical-promoted carbonylative cyclization strategy for the synthesis of phenanthren-9-(10H)-one frameworks from biaryl enones using aldehydes as the carbonyl radical sources is disclosed. The reaction proceeds through a sequential addition of a carbonyl radical to the olefin followed by cyclization with an aryl ring. The method is further extended to carbamoyl radicals generated from oxamic acids to access the corresponding phenanthrenones with amide functionalities.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Dattahari H Kolgave
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Sana Fatima
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Remya Ramesh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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3
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Wang J, Lin Phang Y, Yu YJ, Liu NN, Xie Q, Zhang FL, Jin JK, Wang YF. Boryl Radical as a Catalyst in Enabling Intra- and Intermolecular Cascade Radical Cyclization Reactions: Construction of Polycyclic Molecules. Angew Chem Int Ed Engl 2024; 63:e202405863. [PMID: 38589298 DOI: 10.1002/anie.202405863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Cascade radical cyclization constitutes an atom- and step-economic route for rapid assembly of polycyclic molecular skeletons. Although an array of redox-active metal catalysts has recently shown robust applications in enabling various catalytic cascade radical processes, the use of free organic radical as the catalyst, which is capable of triggering strategically distinct cascades, has rarely been developed. Here, we disclosed that the benzimidazolium-based N-heterocyclic carbene (NHC)-boryl radical is capable of catalyzing cascade cyclization reactions in both intra- and intermolecular pathways, assembling [5,5] fused bicyclic and [6,6,6] fused tricyclic molecules, respectively. The catalytic reactions start with the chemo- and regioselective addition of the boryl radical catalyst to a tethered alkene or alkyne moiety, followed by either an intramolecular formal [3+2] or an intermolecular [2+2+2] cycloaddition process to construct bicyclo[3.3.0]octane or tetrahydrophenanthridine skeletons, respectively. Eventually, a β-elimination occurs to release the boryl radical catalyst, completing a catalytic cycle. High to excellent diastereoselectivity is achieved in both catalytic reactions under substrate control.
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Affiliation(s)
- Jie Wang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Yee Lin Phang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - You-Jie Yu
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Nan-Nan Liu
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Qiang Xie
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Feng-Lian Zhang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Ji-Kang Jin
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Yi-Feng Wang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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4
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Wang L, Mu H, Sun Y, Jin Y, Zhang W. Asymmetric synthesis of spiro[4H-chromene-3,3'-oxindoles] via a squaramide-organocatalytic three-component cascade Knoevenagel/Michael/cyclization sequence. Mol Divers 2024:10.1007/s11030-024-10852-6. [PMID: 38687399 DOI: 10.1007/s11030-024-10852-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Accepted: 03/18/2024] [Indexed: 05/02/2024]
Abstract
Asymmetric synthesis of spiro[4H-chromene-3,3'-oxindole] derivatives was realized through an organocatalytic cascade Knoevenagel/Michael/cyclization reaction using a quinidine-derived squaramide. Under the optimized conditions, the reactions of isatins, malononitrile, and sesamol yield the desired spirooxindoles in good yields (75-87%) and moderate to high ee values (up to 90% ee).
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Affiliation(s)
- Liming Wang
- Department of Pharmacy, Jilin Medical University, Jilin, 132013, People's Republic of China
| | - Hongwen Mu
- Department of Pharmacy, Jilin Medical University, Jilin, 132013, People's Republic of China
| | - Yuhong Sun
- Department of Pharmacy, Jilin Medical University, Jilin, 132013, People's Republic of China
| | - Ying Jin
- Department of Pharmacy, Jilin Medical University, Jilin, 132013, People's Republic of China.
| | - Wei Zhang
- Department of Pharmacy, Jilin Medical University, Jilin, 132013, People's Republic of China.
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5
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Cui Y, Xu W, Yang W, Meng F. Access to CF 2COR-Containing Quinazolinones via Visible-Light-Induced Domino Difluoroalkylation/Cyclization of N-Cyanamide Alkenes. Org Lett 2024; 26:2119-2123. [PMID: 38436251 DOI: 10.1021/acs.orglett.4c00457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
A green and highly efficient visible-light-induced radical cascade difluoroalkylation/cyclization reaction of N-cyanamide alkenes has been developed. A variety of CF2COR-containing quinazolinones have been obtained in high yields with cheap non-metallic 4CzIPN as the photocatalyst. This photocatalytic reaction provides rapid, facile, and practical access to valuable polycyclic quinazolinone, and it is amenable to the gram scale.
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Affiliation(s)
- Yangyang Cui
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Wen Xu
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Wenchao Yang
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Fei Meng
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
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6
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Patil BR, Nichinde CB, Chaudhari SS, Krishna GR, Kinage AK. Organocatalyzed [4 + 2] cycloaddition of α,β-unsaturated ketones and isatylidene malononitrile: accessing spiro[3-arylcyclohexanone]oxindole derivatives. RSC Adv 2024; 14:2873-2877. [PMID: 38239455 PMCID: PMC10793649 DOI: 10.1039/d3ra07652k] [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: 11/09/2023] [Accepted: 12/29/2023] [Indexed: 01/22/2024] Open
Abstract
Herein, we developed a series of compounds featuring spiro[3-arylcyclohexanone]oxindoles through Barbas [4 + 2] cycloaddition reactions between isatylidene malononitrile and α,β-unsaturated ketones using l-proline as an organocatalyst. The reported methodology offers many advantages such as mild reaction conditions, diverse substrate scope with high yields, easy reaction setup, and use of easily synthesizable starting materials.
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Affiliation(s)
- Baliram R Patil
- Chemical Engineering and Process Development Division, Council of Scientific and Industrial Research-National Chemical Laboratory (CSIR-NCL) Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Chandrakant B Nichinde
- Chemical Engineering and Process Development Division, Council of Scientific and Industrial Research-National Chemical Laboratory (CSIR-NCL) Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Suryakant S Chaudhari
- Chemical Engineering and Process Development Division, Council of Scientific and Industrial Research-National Chemical Laboratory (CSIR-NCL) Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Gamidi Rama Krishna
- Organic Chemistry Division, Council of Scientific and Industrial Research-National Chemical Laboratory (CSIR-NCL) Pune 411008 India
| | - Anil K Kinage
- Chemical Engineering and Process Development Division, Council of Scientific and Industrial Research-National Chemical Laboratory (CSIR-NCL) Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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7
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Wang B, Singh J, Deng Y. Photoredox-Catalyzed Divergent Radical Cascade Annulations of 1,6-Enynes via Pyridine N-Oxide-Promoted Vinyl Radical Generation. Org Lett 2023; 25:9219-9224. [PMID: 38112553 PMCID: PMC10842598 DOI: 10.1021/acs.orglett.3c03930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The divergent organophotoredox-catalyzed radical cascade annulation reactions of 1,6-enynes were developed. A series of cyclopropane-fused hetero- and carbo-bicyclic, tricyclic, and spiro-tetracyclic compounds were facilely synthesized from a broad scope of 1,6-enynes and 2,6-lutidine N-oxide under mild and metal-free conditions with blue light-emitting diode light irradiation. The cascade annulation reaction occurs with the intermediacy of a β-oxyvinyl radical, which is produced from photocatalytically generated pyridine N-oxy radical addition to the carbon-carbon triple bond.
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Affiliation(s)
- Ban Wang
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 North Blackford Street, Indianapolis, Indiana 46202, United States
| | - Jujhar Singh
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 North Blackford Street, Indianapolis, Indiana 46202, United States
| | - Yongming Deng
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, 402 North Blackford Street, Indianapolis, Indiana 46202, United States
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8
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Zhuang QB, Tian JR, Lu K, Zhang XM, Zhang FM, Tu YQ, Fan R, Li ZH, Zhang YD. Catalytic Asymmetric Polycyclization of Tertiary Enamides with Silyl Enol Ethers: Total Synthesis of (-)-Cephalocyclidin A. J Am Chem Soc 2023. [PMID: 38019148 DOI: 10.1021/jacs.3c11178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
A catalytic enantioselective polycyclization of tertiary enamides with terminal silyl enol ethers has been developed by virtue of Cu(OTf)2 catalysis with a novel spiropyrroline-derived oxazole (SPDO) ligand. This tandem reaction offers an effective approach to assemble bicyclic and tricyclic N-heterocycles bearing both aza- and oxa-quaternary stereogenic centers, which are primal subunits in a range of natural alkaloids. Strategic application of this methodology and a late-stage radical cyclization as key steps have been showcased in the concise total synthesis of (-)-cephalocyclidin A.
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Affiliation(s)
- Qing-Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jin-Rui Tian
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Ka Lu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- School of Chemistry and Chemical Engineering, Frontier Scientific Center of Transformative Molecules, Shanghai Key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai Minhang 200240, China
| | - Rong Fan
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Hao Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yu-Dong Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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9
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Qiu YF, Cao JH, Wang S, Wang Q, Li M, Wang JJ, Quan ZJ, Wang XC. Synthesis of 3(2 H)-furanone derivatives: p-TsOH/halotrimethylsilane promoted cycloketonization of γ-hydroxyl ynones. Org Biomol Chem 2023; 21:8744-8748. [PMID: 37873567 DOI: 10.1039/d3ob01500a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
A p-TsOH/halotrimethylsilane facilitated cycloketonization of γ-hydroxyl ynones is detailed. This methodology enables the one-step synthesis of polysubstituted 3(2H)-furanone products. It is remarkable that the reaction exhibits excellent regio- and chemoselectivity by the addition of very small quantities of p-toluenesulfonic acid and water.
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Affiliation(s)
- Yi-Feng Qiu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Jian-He Cao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Shutao Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qiang Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Ming Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Jun-Jiao Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Zheng-Jun Quan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
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10
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Fessler J, Junge K, Beller M. Applying green chemistry principles to iron catalysis: mild and selective domino synthesis of pyrroles from nitroarenes. Chem Sci 2023; 14:11374-11380. [PMID: 37886090 PMCID: PMC10599485 DOI: 10.1039/d3sc02879h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 08/02/2023] [Indexed: 10/28/2023] Open
Abstract
An efficient and general cascade synthesis of pyrroles from nitroarenes using an acid-tolerant homogeneous iron catalyst is presented. Initial (transfer) hydrogenation using the commercially available iron-Tetraphos catalyst is followed by acid catalysed Paal-Knorr condensation. Both formic acid and molecular hydrogen can be used as green reductants in this process. Particularly, under transfer hydrogenation conditions, the homogeneous catalyst shows remarkable reactivity at low temperatures, high functional group tolerance and excellent chemoselectivity transforming a wide variety of substrates. Compared to classical heterogeneous catalysts, this system presents complementing reactivity, showing none of the typical side reactions such as dehalogenation, debenzylation, arene or olefin hydrogenation. It thereby enhances the chemical toolbox in terms of orthogonal reactivity. The methodology was successfully applied to the late-stage modification of multi-functional drug(-like) molecules as well as to the one-pot synthesis of the bioactive agent BM-635.
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Affiliation(s)
- Johannes Fessler
- Leibniz-Institut für Katalyse e.V. (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Germany
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11
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Rajput D, Jan G, Karuppasamy M, Bhuvanesh N, Nagarajan S, Maheswari CU, Menéndez JC, Sridharan V. Rapid Assembly of Functionalized 2 H-Chromenes and 1,2-Dihydroquinolines via Microwave-Assisted Secondary Amine-Catalyzed Cascade Annulation of 2- O/ N-Propargylarylaldehydes with 2,6-Dialkylphenols. J Org Chem 2023; 88:11778-11792. [PMID: 37556760 DOI: 10.1021/acs.joc.3c01082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
An efficient, secondary amine-catalyzed cascade annulation of 2-O/N-propargylarylaldehydes with 2,6-dialkylphenols was established to access biologically relevant functionalized 2H-chromenes and 1,2-dihydroquinolines tethered with a synthetically useful p-quinone methide scaffold in high yields under microwave irradiation and conventional heating conditions. The microwave-assisted strategy was convenient, clean, rapid, and high yielding in which the reactions were completed in just 15 min, and the yields obtained were up to 95%. This highly atom-economical domino process constructed two new C-C double bonds and a six-membered O/N-heterocyclic ring in a single synthetic operation. Its mechanism process was rationalized as involving sequential iminium ion formation, nucleophilic addition, and intramolecular annulation steps. Furthermore, the synthesized 2H-chromene derivatives were transformed into valuable indeno[2,1-c]chromenes, 5H-indeno[2,1-c]quinolines, and oxireno[2,3-c]chromene via a palladium-catalyzed double C-H bond activation process and epoxidation, respectively.
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Affiliation(s)
- Diksha Rajput
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Gowsia Jan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Muthu Karuppasamy
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Subbiah Nagarajan
- Department of Chemistry, National Institute of Technology, Warangal, Warangal 506004, Telangana, India
| | - C Uma Maheswari
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - J Carlos Menéndez
- Unidad de Química Orgánica y Farmacéutica, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
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12
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Suzuki T, Ikeda W, Kanno A, Ikeuchi K, Tanino K. Diastereoselective Synthesis of trans-anti-Hydrophenanthrenes via Ti-mediated Radical Cyclization and Total Synthesis of Kamebanin. Chemistry 2023; 29:e202203511. [PMID: 36529687 DOI: 10.1002/chem.202203511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 12/23/2022]
Abstract
Ent-kaurenes consist of an ABC-ring based on a trans-anti-hydrophenanthrene skeleton and a D ring with an exomethylene. Highly oxygen-functionalized ent-kauren-15-ones have promising antiinflammatory pharmacological activity. In this study, we developed a novel diastereoselective synthesis of trans-anti-hydrophenanthrenes via a Ti-mediated reductive radical cyclization. We also demonstrated the applicability of this method by developing the first total synthesis of (±)-kamebanin (longest linear sequence; 17 steps, overall yield; 6.5 %). Furthermore, this synthesis provided a formal semi-pinacol rearrangement for the construction of the quaternary carbon at C8 and a novel Thorpe-Ziegler-type reaction for the construction of the D-ring.
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Affiliation(s)
- Takahiro Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Wataru Ikeda
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Ayaka Kanno
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Kazutada Ikeuchi
- Department of Chemistry, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Keiji Tanino
- Department of Chemistry, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
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13
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Gugulothu K, Jatoth R, Edukondalu P, Vanga A, Matta R, Shiva Kumar K. Synthesis of fused bis-indazoles/indazoles via a one-pot sequential strategy. Org Biomol Chem 2023; 21:2816-2821. [PMID: 36924392 DOI: 10.1039/d3ob00121k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
We report here an efficient synthesis of fused bis-indazoles/indazoles via a one-pot sequential strategy starting from o-azido aldehydes and amines. This novel method involves the sequential formation of 2H-indazole followed by a Pd-catalyzed intramolecular cross-dehydrogenative coupling reaction. Overall, this one-pot sequential reaction involved the formation of new five bonds, resulting in the formation of three heterocyclic rings.
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Affiliation(s)
- Kishan Gugulothu
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | - Ramanna Jatoth
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | | | - Anusha Vanga
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | - Raghavender Matta
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | - K Shiva Kumar
- Department of Chemistry, Osmania University, Hyderabad-500 007, India.,Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, Kerala 671320, India.
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14
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Song Y, Wu C, Zhang J, Zhang W, Qin X, Yang Y, Kang G, Jiang J, Liu H. Switchable multipath cascade cyclization to synthesize bicyclic lactams and succinimides via chemodivergent reaction. Chem Commun (Camb) 2023; 59:3313-3316. [PMID: 36852458 DOI: 10.1039/d2cc06841a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Herein, a novel switchable multipath cascade cyclization via chemodivergent reaction between readily available ketoamides and deconjugated butenolides was developed to efficiently synthesize γ-lactone fused γ-lactams and succinimide fused hemiketals. The Aldol/aza-Michael reaction and Aldol/imidation/hemiketalization reaction were enabled by catalytic amounts of two bases, namely tetramethyl guanidine and NaOAc. A wide range of substrate scope with diverse functional group compatibility was demonstrated to deliver the corresponding products with good yield and excellent diastereoselectivity (>60 examples).
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Affiliation(s)
- Yimei Song
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Chaofei Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Jinhai Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Wenhai Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Xin Qin
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Yixiao Yang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Guowei Kang
- Department of Chemistry, The Scripps Research Institute, North Torrey Pines Road, La Jolla 10550, USA.
| | - Jun Jiang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Hongxin Liu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China. .,Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325035, China.
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15
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Liu L, Wen C, Sun G, Li Y, Zhang J, Zhang Z, Wang Z, She M, Liu P, Zhang S, Li J. Multisite-Sequential Cyclization To Construct 1,2,4-Triazole-Based N-Fused Heterocyclics. Org Lett 2023; 25:1530-1535. [PMID: 36852941 DOI: 10.1021/acs.orglett.3c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A feasible protocol that uses atomic groups (KSCN, KSeCN, and NH2CN), o-bromobenzoyl hydrazides, and formyls as reaction factors to synthesize N-fused 1,2,4-triazole with benzothiazides, benzoselenazinones, and quinazolinones was proposed. The method overcomes the lengthy multistep synthesis, narrow substrate scope, and toxicity challenge induced by the use or production of hazardous substances. It also enables the development of fused-heterocyclic selenium and quinazolinone derivatives. Their fluorescent performance further demonstrates the practicability of this methodology.
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Affiliation(s)
- Lang Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Changting Wen
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Guojin Sun
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Yao Li
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jun Zhang
- College of Chemistry and Chemical Engineering, Ningxia University Yinchuan, Ningxia, 750021, P. R. China
| | - Zhe Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Zesi Wang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Mengyao She
- Ministry of Education Key Laboratory of Resource Biology and Modern Biotechnology in Western China, The College of Life Sciences, Faculty of Life and Health Science, Northwest University, Xi'an, Shaanxi Province 710069, P. R. China
| | - Ping Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Shengyong Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jianli Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710127, P. R. China
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16
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Ulrich NC, Yu JS, Wiemer DF. Cationic cascade cyclizations terminated by MOM ether derivatives of β-keto esters. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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17
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Wu D, Zhang Z, Li X, Han J, Hu Q, Yu Y, Mao Z. Cucurbit[10]uril-based supramolecular radicals: Powerful arms to kill facultative anaerobic bacteria. J Control Release 2023; 354:626-634. [PMID: 36681280 DOI: 10.1016/j.jconrel.2023.01.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 01/11/2023] [Accepted: 01/14/2023] [Indexed: 01/23/2023]
Abstract
Two water-soluble supramolecular complexes (CB[10]⊃PSA and CB[10]⊃TPE-cyc) are constructed based on the host-guest interaction between cucurbit[10]uril (CB[10]) and perylene diimide derivative (PSA) or tetracationic cyclophane (TPE-cyc). Attributing to the matched redox potential, both supramolecular complexes can be specifically reduced into corresponding supramolecular radical cations or anions by facultative anaerobic E. coli. Benefiting from the strong near-infrared (NIR) absorption, CB[10]⊃PSA radical anions and CB[10]⊃TPE-cyc radical cations act as efficient NIR photosensitizers and perform an excellent antimicrobial activity (close to 100%) via PTT. In addition, the biocompatibility of TPE-cyc is notably improved under the protection of CB[10], guaranteeing its biosafety for in vivo application. CB[10]⊃PSA radical anions and CB[10]⊃TPE-cyc radical cations are in situ generated in the E. coli-infected abscess of mice and effectively inhibit the bacterial infection without obvious system toxicity. It is anticipated that this supramolecular strategy may pave a new way for the selective bacteria inhibition to regulate the balance of different bacterial flora.
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Affiliation(s)
- Dan Wu
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Zhankui Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Xinyue Li
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Jin Han
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China..
| | - Qinglian Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China..
| | - Yuan Yu
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, PR China..
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, PR China..
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18
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Nikbakht A, Ebrahimi Valdani A, Zahedian Tejeneki H, Abbasi Kejani A, Alavijeh NS, Bauer F, Darvish F, Breit B, Balalaie S. A Diastereoselective Cascade Annulation Approach to Bridged Polycyclic Heterocycles Involving an Unexpected Rearrangement. Org Lett 2023; 25:16-20. [PMID: 36542429 DOI: 10.1021/acs.orglett.2c03629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A diastereoselective cascade annulation between allenoates and in-situ generated isoquinoline N-oxides generating sp3-rich bridged polycyclic heterocycles is disclosed. The reaction proceeds through an unprecedented non-rearomatized rearrangement and allows access to a broad range of bridged heterocycles in 38-93% yields with excellent functional group tolerance and high diastereoselectivity. Density functional theory calculations provided key insights into the possible reaction pathway and the stereoselectivity of this procedure.
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Affiliation(s)
- Ali Nikbakht
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Ahmadreza Ebrahimi Valdani
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Hossein Zahedian Tejeneki
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Alireza Abbasi Kejani
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Nahid S Alavijeh
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Felix Bauer
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau, Germany
| | - Fatemeh Darvish
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau, Germany
| | - Saeed Balalaie
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran.,Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah 6715847141, Iran
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19
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Hu XY, Zhu SJ, Meng XH, Yu HF, Liu X, Zhang LY, Wei Y, Lei CW, Wei X, Zhou Y. Structural Elucidation and Total Synthesis for the Pair of Unprecedented Polypyridines with Anti-AChE and HIV-1 Protease Activities from Alangium chinense. J Org Chem 2022; 87:16047-16053. [PMID: 36354352 DOI: 10.1021/acs.joc.2c02180] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Unlike reported pyridine hybrids, 2S (1a) and 2R-alanginenmine A (1b) from Alangium chinense featuring an unprecedented piperidine-bridged polypyridine skeleton represented a pair of alkaloid subtypes with a unique multiple pyridine scaffold. Enlightened by the rare structural characteristics and possible biosynthetic pathway, (±)-alanginenmine A (1) have been achieved in ideal yield by gram-class total synthesis with four steps. In addition, both compounds 1a and 1b exhibited anti-acetylcholinesterase (AChE) and HIV-1 protease activities in the biological activity evaluation. Further, molecular docking was investigated for the mechanism of action between the isolated compounds and HIV-1 protease. The stronger Coulomb interactions and van der Waals interaction, as well as the hydrogen bond interactions of 1a, might be the main cause for its better anti-HIV-1 protease activity than 1b. This work provided a comprehensive research including natural product discovery, bioactivity evaluation, and total synthesis for the new type of leading anti-HIV-1 protease.
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Affiliation(s)
- Xin-Yue Hu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Shi-Jie Zhu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Xiu-Hua Meng
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Hao-Fei Yu
- School of Pharmaceutical Sciences, Kunming Medical University, Kunming 650500, China
| | - Xia Liu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.,School of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Li-Yan Zhang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Ying Wei
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Chuan-Wen Lei
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Xin Wei
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Ying Zhou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
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20
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Qiu YF, Chen SP, Cao JH, Wang S, Li JH, Li M, Quan ZJ, Wang XC, Liang YM. Access to Polysubstituted Halophosphorylated Dihydrofurans via Halotrimethylsilane-Promoted Cascade Cyclization of γ-Hydroxyl Ynones with Diphenylphosphine Oxides. Org Lett 2022; 24:8609-8614. [DOI: 10.1021/acs.orglett.2c03323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Yi-Feng Qiu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
| | - Shi-Peng Chen
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Jian-He Cao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
| | - Shutao Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Jin-Hao Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
| | - Ming Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
| | - Zheng-Jun Quan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
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21
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Recent Advances on Confining Noble Metal Nanoparticles Inside Metal-Organic Frameworks for Hydrogenation Reactions. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2250-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Abstract
One-pot synthesis is an active topic in organic chemistry due to its intrinsic advantages of simple operation, high mass efficiency, low cost, and less amount of waste disposal. Among three kinds of one-pot syntheses, 1) cascade reactions, 2) multicomponent reactions (MCRs), and 3) one-pot stepwise synthesis (OPSS), OPSS could be more flexible and practical since it is carried out stepwisely and have variable reaction conditions for different steps. This perspective article uses selected examples to highlight the recent development in OPSS involving cyclization, cycloaddition, rearrangement, and catalytic reactions for the synthesis of heterocyclic scaffolds, asymmetric molecules, natural products, and bioactive compounds.
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23
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Li Y, Cao Z, Wang Z, Xu L, Wei Y. Copper-Catalyzed Reactions of Alkenyl Boronic Esters via Chan-Evans-Lam Coupling/Annulation Cascades: Substrate Selective Synthesis of Dihydroquinazolin-4-ones and Polysubstituted Quinolines. Org Lett 2022; 24:6554-6559. [PMID: 36036773 DOI: 10.1021/acs.orglett.2c02522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Copper-catalyzed cascade cyclization reactions between alkenyl boronic esters and N-H-based nucleophiles have been established, providing new approaches for one-pot assembly of azacycles. Following the Chan-Evans-Lam C-N couplings, the cyclization processes occur via divergent pathways based on the utilized substrates, affording hydroamination product dihydroquinazolin-4-ones or aromatization product quinolines. Via this one-pot C-N coupling/annulation cascade, the target substituted azacycles can be obtained in moderate to good yields in each case.
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Affiliation(s)
- Yuge Li
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Zifeng Cao
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Zhijun Wang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Liang Xu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
| | - Yu Wei
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, P. R. China
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24
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Tammisetti R, Hong BC, Chien SY, Lee GH. Stereoselective Cyclization Cascade of Dihydroquinoxalinones by Visible-Light Photocatalysis: Access to the Polycyclic Quinoxalin-2(1 H)-ones. Org Lett 2022; 24:5155-5160. [PMID: 35802069 DOI: 10.1021/acs.orglett.2c01991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An intriguing stereoselective visible-light photocatalysis of dihydroquinoxalinone derivatives has been realized via cyclization with or without the solvolysis cascade. The reactions provided the polycyclic ring structures with efficient formation of multiple bonds and with high stereoselectivity. X-ray crystallography unequivocally determined the structures of five polycyclic products.
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Affiliation(s)
| | - Bor-Cherng Hong
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi 621, Taiwan, R.O.C
| | - Su-Ying Chien
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan, R.O.C
| | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan, R.O.C
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25
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Pilania M, Vaishya V, Singhal R, Kriplani T. Recent Advances in Transition-Metal-Catalyzed Reactions of N-Tosylhydrazones. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0040-1719930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Abstract
N-Tosylhydrazones are highly versatile precursors for in situ carbene formation and are frequently used in metal-catalyzed cross-coupling reactions. Due to their many applications in organic synthesis, including C–C, C–O, C–N, and C–S bond formation, N-tosylhydrazones have recently received much interest. They can be simply synthesized by reacting an aldehyde or ketone with N-tosylhydrazine to produce a solid N-tosylhydrazone, which is a ‘green’ precursor of diazo compounds. Using a suitable metal catalyst, N-tosylhydrazones show versatile substrate scope for the synthesis of substituted diaminopyrroles, chromenopyrazoles, alkenylpyrazoles, benzofuran thioethers, tetrahydropyridazines, sulfur-containing heterocycles, and benzofurans with potent biological activities and even regioselective N-functionalization reactions. Metal-catalyzed reactions of N-tosylhydrazones for the construction of bioactive heterocycles are still highly in demand. Hence, this review focuses on the recent synthetic application of N-tosylhydrazones influenced by different transition metals with notable features like simple workup procedures, gram-scale synthesis, broad substrate scope, multicomponent processes, cyclization, and carbon–heteroatom bond formation.1 Introduction2 Applications of N-Tosylhydrazones3 Conclusion
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26
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Rajput D, Kumar A, Jandial T, Karuppasamy M, Bhuvanesh N, Kumar RS, Almansour AI, Sridharan V. Microwave-Assisted Copper(II)-Catalyzed Cascade Cyclization of 2-Propargylamino/Oxy-Arylaldehydes and O-Phenylenediamines: Access to Densely Functionalized Benzo[ f]Imidazo[1,2- d][1,4]Oxazepines and Benzo[ f]Imidazo[1,2- d][1,4]Diazepines. J Org Chem 2022; 87:8956-8969. [PMID: 35765119 DOI: 10.1021/acs.joc.2c00671] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly efficient microwave-assisted copper(II)-catalyzed cyclization cascade was established starting from readily accessible O/N-propargylated 2-hydroxy or 2-aminobenzaldehydes and o-phenylenediamines to synthesize densely functionalized imidazo[1,2-d][1,4]oxazepines and imidazo[1,2-d][1,4]diazepines in high yields (up to 93%). This one-pot two-step process was found to be highly atom economical (-H2O, -H2) and operationally simple and enabled the generation of two new heterocycle rings (seven- and five-membered) and three new C-N bonds in a single synthetic operation. These reactions well tolerated a variety of substituents including electron-donating and electron-withdrawing groups and furnished the desired fused heterocycles in high yields under microwave irradiation in a very short reaction time. The mechanism of the established protocol involves sequential imine formation-intramolecular cyclization-air oxidation followed by 7-exo-dig cyclization steps. A comparative study between the microwave-assisted approach and conventional heating was also performed to demonstrate the advantages of the microwave-assisted protocol in terms of high yield and shorter reaction time.
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Affiliation(s)
- Diksha Rajput
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Atul Kumar
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Tanvi Jandial
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Muthu Karuppasamy
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Raju Suresh Kumar
- Department of Chemistry, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulrahman I Almansour
- Department of Chemistry, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
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27
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Zhang C, Chen Q, Wang L, Sun Q, Yang Y, Rudolph M, Rominger F, Hashmi ASK. Practical and modular construction of benzo[c]phenanthridine compounds. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1273-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractHere, we describe a general and modular strategy for the rapid assembly of benzo[c]phenanthridine (BCP) derivatives using homogeneous gold catalysis. Notably, in contrast to traditional methods based on the specially preformed substrates that have an inherent preference for the formation of this class of compounds with limited flexibility, this protocol is achieved via a selectively intramolecular cascade of a diazo-tethered alkyne and subsequently an intermolecular cyclization with a nitrile to facilitate the successive C-N and C-C bonds formation. This methodology uses readily available nitriles as the nitrogen source to deliver the products in good yield with excellent functional group compatibility. A preliminary anti-tumor activity study of these generated products exhibits high anticancer potency against five tumor cell lines, including HeLa, Mel624, SW-480, 8505C, LAN-1. Besides, we report a catalyst-controlled intermolecular cycloaddition/intramolecular insertion of the substrate with a fulvene to provide fused polycarbocycles containing a seven-membered ring.
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28
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Roy S, Paul H, Chatterjee I. Light‐Mediated Aminocatalysis: The Dual‐Catalytic Ability Enabling New Enantioselective Route. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sourav Roy
- IIT Ropar: Indian Institute of Technology Ropar Chemistry INDIA
| | - Hrishikesh Paul
- IIT Ropar: Indian Institute of Technology Ropar Chemistry INDIA
| | - Indranil Chatterjee
- Indian Institute of Technology, Ropar Chemistry Nangal Road 140001 Rupnagar INDIA
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29
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Palladium-catalyzed norbornene-mediated dehydrogenative annulation of 3-iodochromones with trifluoroacetimidoyl chlorides for the construction of trifluoromethyl-substituted chromeno[2,3-c]quinolin-12-ones. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Qiao C, Villar-Yanez A, Garay-Ruiz D, Buchholz JB, Bo C, Kleij AW. Domino Synthesis of Bicyclic 3,5-Anhydro Furanose Mimics Using a Binary Al(III) Complex/Halide Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00925] [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)
- Chang Qiao
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
- Departament de Química Física i Inorgánica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Alba Villar-Yanez
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
- Departament de Química Física i Inorgánica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Diego Garay-Ruiz
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
- Departament de Química Física i Inorgánica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Jordi-Benet Buchholz
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
- Departament de Química Física i Inorgánica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Arjan W. Kleij
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Catalan Institute of Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010 Barcelona, Spain
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31
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Holman KR, Stanko AM, Richter MJR, Feng SS, Gessesse MN, Reisman SE. Synthesis of Noraugustamine and Development of an Oxidative Heck/Aza-Wacker Cascade Cyclization. Org Lett 2022; 24:3019-3023. [DOI: 10.1021/acs.orglett.2c00948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karli R. Holman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Allison M. Stanko
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Matthieu J. R. Richter
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sean S. Feng
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Mahideremariyam N. Gessesse
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sarah E. Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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32
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Das AJ, Das SK. One-Pot Double Intramolecular Cyclization Approach to Tetralin-Based Cis-Fused Tetracyclic Compounds. J Org Chem 2022; 87:5085-5096. [PMID: 35333509 DOI: 10.1021/acs.joc.1c02963] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Presented herein is a BF3·OEt2-mediated, diastereoselective one-pot double cyclization of 4-aryl-2-[(arylthio)methyl]butanals leading to the formation of cis-tetrahydro-6H-naphtho[2,1-c]thiochromenes for the first time. Mechanistically, the formation of the title products involves the one-pot intramolecular Friedel-Crafts hydroxyalkylation/intramolecular Friedel-Crafts alkylation cascade. This synthetic methodology is featured by its high atom economy, broad substrate scope, mild transition-metal-free reaction conditions, capability to assemble two new rings in one pot, and moderate to high yields (up to 94% yield). It was then applied in the synthesis of a thia analogue of brazilane and a chromeno[3,4-c]chromene derivative. Moreover, the methodology was successfully extended to the synthesis of cis-hexahydrobenzo[c]phenanthrenes. Specifically, 1,5-diarylpentan-3-ones were first subjected to the Corey-Chaykovsky reaction, and the resulting epoxides, without being chromatographically isolated, were treated with BF3·OEt2 to afford the cyclized products in high yields (up to 84% yield over two steps).
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Affiliation(s)
- Arup Jyoti Das
- Department of Chemical Sciences, Tezpur University, Napaam, Sonitpur, Assam 784028, India
| | - Sajal Kumar Das
- Department of Chemical Sciences, Tezpur University, Napaam, Sonitpur, Assam 784028, India
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33
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Affiliation(s)
- Samuel J. Plamondon
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC H3A 0B8, Canada
| | - James L. Gleason
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC H3A 0B8, Canada
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34
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Wang Y, Tian H, Li H, Deng X, Zhang Q, Ai Y, Sun Z, Wang Y, Liu L, Hu ZN, Zhang X, Guo R, Xu W, Liang Q, Sun HB. Encapsulating Electron-Rich Pd NPs with Lewis Acidic MOF: Reconciling the Electron-Preference Conflict of the Catalyst for Cascade Condensation via Nitro Reduction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7949-7961. [PMID: 35130694 DOI: 10.1021/acsami.1c22256] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Cascade reactions take advantage of step-saving and facile operation for obtaining chemicals. Herein, catalytic hydrogenation of nitroarene coupled condensation with β-diketone to afford β-ketoenamines is achieved by an integrated nanocatalyst, Pd-e@UiO-66. The catalyst has the structure of an acid-rich metal-organic framework (MOF), UiO-66-encapsulated electron-rich Pd nanoparticles, and it reconciles the electron-effect contradiction of cascade catalytic reactions: catalytic hydrogenation requires an electron-rich catalyst, while condensation requires electron-deficient Lewis acid sites. The catalyst showed good activity, high chemoselectivity, and universal applicability for the synthesis of β-ketoenamines using nitroarenes. More than 30 β-ketoenamines have been successfully prepared with up to 99% yield via the methodology of relay catalysis. The catalyst exhibited excellent stability to maintain its catalytic performance for more than five cycles. Furthermore, we conducted an in-depth exploration of the reaction mechanism with theoretical calculations.
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Affiliation(s)
- Yiming Wang
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Haimeng Tian
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Hong Li
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Xinchen Deng
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Qiao Zhang
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Yongjian Ai
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, People's Republic of China
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330088, Jiangxi, People's Republic of China
| | - Zejun Sun
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Yu Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Lei Liu
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Ze-Nan Hu
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Xinyue Zhang
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Rongxiu Guo
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Wenjuan Xu
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Qionglin Liang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Hong-Bin Sun
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
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35
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Wang R, Rebek J, Yu Y. Organic radical reactions confined to containers in supramolecular systems. Chem Commun (Camb) 2022; 58:1828-1833. [PMID: 35084001 DOI: 10.1039/d1cc06851b] [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
Radical chemistry and host-guest chemistry have each developed rapidly over the past decades and their intersection offers an attractive opportunity for modern applications. Radicals can be introduced into the frameworks of supramolecular hosts or radicals can be guests, generated in and confined to host containers. In this highlight we outline research achievements in both approaches, photoinduced and external reagent-initiated radicals in the host. Specific topics include rearrangement and fragmentation reactions, hydrocarbon oxidation and alkyl halide reductions of molecules confined to various supramolecular complexes. Applications to challenging problems in chemical synthesis are suggested.
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Affiliation(s)
- Rui Wang
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, Shanghai 200444, China.
| | - Julius Rebek
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, Shanghai 200444, China. .,Skaggs Institute for Chemical Biology and Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Yang Yu
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, Shanghai 200444, China.
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36
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Munda M, Niyogi S, Shaw K, Kundu S, Nandi R, Bisai A. Electrocatalysis as a key strategy for the total synthesis of natural products. Org Biomol Chem 2022; 20:727-748. [PMID: 34989383 DOI: 10.1039/d1ob02115j] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Electrochemical strategies have been a powerful approach for the synthesis of valuable intermediates, in particular heterocyclic motifs. Because of the mild nature, a wide range of nonclassical bond disconnections have been achieved via in situ-generated radical intermediates in a highly efficient manner. In particular, anodic electrochemical oxidative strategies have been utilized for the total synthesis of many structurally intriguing natural products. In this review article, we have discussed a number of total syntheses of structurally intriguing alkaloids and terpenoids in which electrochemical processes play an important role as a key methodology.
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Affiliation(s)
- Mintu Munda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Sovan Niyogi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia-741246, West Bengal, India.
| | - Kundan Shaw
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Sourav Kundu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Rhituparna Nandi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.,Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia-741246, West Bengal, India.
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37
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Jiang Y, Xi S, Wang Q, Fu L, He L, Wang Z, Zhang M. Facile synthesis of δ-ketoesters via formal two-carbon insertion into β-ketoesters. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Ghosh T, Chatterjee J, Bhakta S. Gold-Catalyzed Hydroarylation Reactions: A Comprehensive Overview. Org Biomol Chem 2022; 20:7151-7187. [DOI: 10.1039/d2ob00960a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydroarylation of alkynes, alkene, and, allene is a cost-effective and efficient way to incorporate unsaturated moieties into aromatic substrates. This review focuses on gold-catalyzed hydroarylation, which produces aromatic alkenes,...
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39
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Sun Z, Huang H, Wang Q, Huang C, Mao G, Deng GJ. Visible light-mediated radical-cascade addition/cyclization of arylacrylamides with aldehydes to form quaternary oxindoles at room temperature. Org Chem Front 2022. [DOI: 10.1039/d2qo00319h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The visible light-induced oxidative radical cascade coupling of N-arylacrylamides with aldehydes using bromide as the hydrogen atom transfer agent to synthesize functional oxindoles is described.
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Affiliation(s)
- Zhaozhao Sun
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, P. R. China
| | - Qiaolin Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Chunyan Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guojiang Mao
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, P. R. China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, P. R. China
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40
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Huo H, Jiang W, Sun F, Li J, Shi B. Synthesis and biological evaluation of novel steroidal pyrazole amides as highly potent anticancer agents. Steroids 2021; 176:108931. [PMID: 34655595 DOI: 10.1016/j.steroids.2021.108931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/18/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022]
Abstract
A series of thirty-six steroidal pyrazole amides, divided into two categories based on their main skeletons were designed and synthesized via a five-step synthetic route. The final product is obtained through Pinnick oxidation of pyrazole aldehydes to yield the corresponding acids, which then underwent amidation to afford the target products efficiently under mild reaction conditions. Structures of the desired compounds were confirmed by 1H NMR, 13C NMR, high resolution mass spectrometry; X-ray structural characterization of compound 16n was also obtained. The synthesized compounds were screened for their antiproliferative activity against four cancer cell lines (Pc-3 A549, Hela, HepG2) using the SRB method. Amides 10n, 16n, and 16p-16t exhibited moderate to high cytotoxic activities with IC50 values ranging from 2.05 to 8.73 μM. Of note, the hydrochloride derivative 16p displayed the highest activity towards PC-3 cells with IC50 values of 2.05 μM. Analysis of structure-activity relationships indicated that the presence of the diamine moiety and the aqueous solubility of the derivatives were vital factors for antiproliferative potency. Furthermore, molecule 16p induced PC-3 cells apoptosis and arrested cell cycle at G1 phase in a dose-dependent manner.
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Affiliation(s)
- Haibo Huo
- State Key Laboratory of Crop Stress Biology in Arid Area, College of Life Science, Northwest Agriculture and Forestry University, Yangling 712100, China
| | - Weiqi Jiang
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Feifei Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jian Li
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Baojun Shi
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
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41
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Hatzfeld J, Skowaisa S, Jäckel E, Kaufmann J, Haak E. Triaminocyclopentadienyl Ruthenium Complexes - New Catalysts for Cascade Conversions of Propargyl Alcohols. Chemistry 2021; 27:15545-15553. [PMID: 34469004 PMCID: PMC8597154 DOI: 10.1002/chem.202102959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Indexed: 12/13/2022]
Abstract
Various triaminocyclopentadienyl ruthenium complexes have been synthesized from Ru3 (CO)12 . The new complexes were tested for their ability to catalyze cascade conversions of propargyl alcohols. Their associated catalytic activities complement the activities of known diaminocyclopentadienone ruthenium complexes. In particular, the substrate scope of catalytic cycloadditions with 3-ketolactones or phloroglucinol derivatives is extended to terpenoid-derived propargyl alcohols containing an internal alkyne moiety. A wide range of cyclic terpenoid and phloroglucinol adducts are obtained by complementary application of both types of catalysts.
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Affiliation(s)
- Jana Hatzfeld
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Steffen Skowaisa
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Elisabeth Jäckel
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Julia Kaufmann
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Edgar Haak
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
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42
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Flores O, Locquet P, Suffert J. An Alternative Route to Complex Allenes or Cyclooctatrienes via a Suzuki Cyclocarbopalladation Cascade. Chemistry 2021; 28:e202103502. [PMID: 34735041 DOI: 10.1002/chem.202103502] [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: 09/26/2021] [Indexed: 11/09/2022]
Abstract
The 4-exo-dig cyclocarbopalladation of vinyl bromides substituted with a triple or double bond resulted in impressive cascade reactions leading to different compounds under Suzuki cross-coupling conditions upon a slight modification of the starting material. When the starting compound carries a triple bond, a single cascade occurs providing a structure containing an allene, a tetrasubstituted cyclopropane, and a cyclobutene with complete stereoselectivity. When the related starting material possessing a double bond is reacted under the same conditions in the presence of various vinyl boronic esters or acids, an efficient 8π-electrocyclization provides tricyclic systems comprised of a cyclobutene unit, as well as a cyclooctatriene. Five carbons of the latter can be selectively decorated with different substituents depending on the choice of the starting material and the boronic coupling partner.
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Affiliation(s)
- Océane Flores
- Faculty of Pharmacy, University of Strasbourg, 74 Route du Rhin, 67400, Illkirch Graffenstaden, France
| | - Pierre Locquet
- Faculty of Pharmacy, University of Strasbourg, 74 Route du Rhin, 67400, Illkirch Graffenstaden, France
| | - Jean Suffert
- Faculty of Pharmacy, University of Strasbourg, 74 Route du Rhin, 67400, Illkirch Graffenstaden, France
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43
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Flores O, Wagner P, Suffert J. Cyclocarbopalladation/Stille Cascade: Stereoselective Access to Quaternary Functionalized Carbons. Org Lett 2021; 23:6568-6572. [PMID: 34375102 DOI: 10.1021/acs.orglett.1c02400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Exploration of the 4-exo-dig cyclocarbopalladation in the discovery of new and original scaffolds afforded some unexpected results. The search for a way to produce seven-membered ring systems led to polycyclic molecules bearing a tetrasubstituted carbon. The triple bond that substitutes the cyclohexene ring on the starting compound is crucial for a high stereoselectivity. This observation has been confirmed by the reaction of a nonsubstituted cyclohexene ring resulting in poor stereoselectivity and low yields.
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Affiliation(s)
- Océane Flores
- Laboratoire d'Innovation Thérapeutique, Université de Strasbourg, CNRS, UMR 7200, 67000 Strasbourg, France
| | - Patrick Wagner
- Laboratoire d'Innovation Thérapeutique, Université de Strasbourg, CNRS, UMR 7200, 67000 Strasbourg, France
| | - Jean Suffert
- Laboratoire d'Innovation Thérapeutique, Université de Strasbourg, CNRS, UMR 7200, 67000 Strasbourg, France
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44
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Han TJ, Wang MC, Mei GJ. 2-Indolymethanols as 4-atom-synthons in oxa-Michael reaction cascade: access to tetracyclic indoles. Chem Commun (Camb) 2021; 57:8921-8924. [PMID: 34387291 DOI: 10.1039/d1cc03653j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first Brønsted acid-catalyzed oxa-Michael reaction cascade of 2-indolylmethanols with trione alkenes was accomplished. By using this practical approach, a variety of tetracyclic indoles were readily created in an ordered sequence with excellent regio- and diastereoselectivity. 2-Indolylmethanols commendably served as four-atom synthons, as opposed to the common three-atom synthons in the previous literature reports. The regioselectivity issue was well handled by the employment of a strong Brønsted acid catalyst. In addition, its dual role in activation of substrates via hydrogen-bonding interaction and acceleration of subsequent intramolecular cyclization and dehydration was proposed to account for the high reaction efficiency.
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Affiliation(s)
- Tian-Jiao Han
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Guang-Jian Mei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
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45
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Correia JTM, Santos MS, Pissinati EF, da Silva GP, Paixão MW. Recent Advances on Photoinduced Cascade Strategies for the Synthesis of N-Heterocycles. CHEM REC 2021; 21:2666-2687. [PMID: 34288377 DOI: 10.1002/tcr.202100160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/24/2021] [Accepted: 06/25/2021] [Indexed: 12/13/2022]
Abstract
Over the last decade, visible-light photocatalysis has proved to be a powerful tool for the construction of N-heterocyclic frameworks, important constituents of natural products, insecticides, pharmacologically relevant therapeutic agents and catalysts. This account highlights recent developments and established methods towards the photocatalytic cascades for preparation of different classes of N-heterocycles, giving emphasis on our contribution to the field.
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Affiliation(s)
- José Tiago M Correia
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Marilia S Santos
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Emanuele F Pissinati
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Gustavo P da Silva
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Márcio W Paixão
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
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46
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Jia J, Huo Q, Yang D, Sun Y, Zhang S, Li S, Shi J, Jiang Z. Granum-Inspired Photoenzyme-Coupled Catalytic System via Stacked Polymeric Carbon Nitride. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jingshan Jia
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Qian Huo
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Dong Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Yiying Sun
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Songping Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 10090, China
| | - Shihao Li
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Jiafu Shi
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
| | - Zhongyi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
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Schneider A, Jegl P, Hauer B. Stereoselective Directed Cationic Cascades Enabled by Molecular Anchoring in Terpene Cyclases. Angew Chem Int Ed Engl 2021; 60:13251-13256. [PMID: 33769659 PMCID: PMC8251838 DOI: 10.1002/anie.202101228] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/15/2021] [Indexed: 01/27/2023]
Abstract
Cascade reactions appeared as a cutting‐edge strategy to streamline the assembly of complex structural scaffolds from naturally available precursors in an atom‐, as well as time, labor‐ and cost‐efficient way. We herein report a strategy to control cationic cyclization cascades by exploiting the ability of anchoring dynamic substrates in the active site of terpene cyclases via designed hydrogen bonding. Thereby, it is possible to induce “directed” cyclizations in contrast to established “non‐stop” cyclizations (99:1) and predestinate cascade termination at otherwise catalytically barely accessible intermediates. As a result, we are able to provide efficient access to naturally widely occurring apocarotenoids, value‐added flavors and fragrances in gram‐scale by replacing multi‐stage synthetic routes to a single step with unprecedented selectivity (>99.5 % ee) and high yields (up to 89 %).
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Affiliation(s)
- Andreas Schneider
- Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart-Vaihingen, Germany
| | - Philipp Jegl
- Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart-Vaihingen, Germany
| | - Bernhard Hauer
- Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569, Stuttgart-Vaihingen, Germany
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Duan XY, Tian Z, Liu B, He T, Zhao LL, Dong M, Zhang P, Qi J. Highly Enantioselective Synthesis of Pyrroloindolones and Pyrroloquinolinones via an N-Heterocyclic Carbene-Catalyzed Cascade Reaction. Org Lett 2021; 23:3777-3781. [PMID: 33891421 DOI: 10.1021/acs.orglett.1c01203] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work, the NHC-catalyzed Michael/Mannich/lactamization cascade reaction of enals with either indole-2-carboxaldehyde-derived aldimines or indole-7-carboxaldehyde-derived aldimines is described. This protocol enables the rapid assembly of optically active pyrroloindolones and pyrroloquinolinones derivatives under mild conditions with high yields, excellent enantioselectivities, and a broad substrate scope.
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Abstract
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Palladium-catalyzed oxidations involving cascade processes provide
a versatile platform for streamlined conversion of simple feedstocks
into functional molecules with high atom and step economy. However,
the achievement of high palladium efficiency and selectivity in Pd-catalyzed
oxidative cascade reactions is still challenging in many cases, as
a result of the aggregation of active palladium species to Pd black
and the possible side reactions during each bond-forming step. The
two current solutions for addressing these issues are either to utilize
oxidant-stable ligands or to use electron transfer mediators (ETMs).
The former solution, which includes the use of amines, pyridines,
sulfoxides, and carbene derivatives, inhibits aggregation of Pd0 during the catalytic cycle, while the latter solution facilitates
reoxidation of Pd0 to PdII to improve the activity
and selectivity. Following our long-standing interest in Pd-catalyzed
oxidations, very recently we developed heterogeneous catalysts to
resolve the issues mentioned above in oxidative cascade reactions.
The heterogeneous palladium catalysts (Pd-AmP-MCF or Pd-AmP-CNC) comprise
palladium nanoclusters (1–2 nm) immobilized on amino-functionalized
siliceous mesocellular foam (MCF) or on crystalline nanocellulose
(CNC), exhibiting high activity, selectivity as well as excellent
recycling ability. In this Account, we will discuss the synthesis
and characterizations
of the heterogeneous palladium catalysts, as well as their catalytic
behaviors, and the mechanisms involved in their reactions. An important
aspect of these catalysts in oxidation reactions is the generation
of active Pd(II) species within the heterogeneous phase. Typical oxidative
cascade reactions of our recent research on this topic include oxidative
carbocyclization-carbonylation, oxidative carbocyclization-borylation,
oxidative alkynylation-cyclization, oxidative carbonylation-cyclization,
and oxidative carbocyclization-alkynylation. These reactions provide
access to important compounds attractive in medicinal chemistry and
functional materials, such as γ-lactone/γ-lactam-based
poly rings, cyclobutenols, highly substituted furans, and oxaboroles.
During these processes, the heterogeneous catalysts exhibited much
higher turnover numbers (TONs) than their homogeneous counterparts
(e.g., Pd(OAc)2) as well as unique selectivity that cannot
be achieved by homogeneous palladium catalysts. The origin of the
high efficiency and unique selectivity of the heterogeneous catalysts
was also investigated. Asymmetric syntheses for the construction of
optically pure compounds were realized based on the excellent selectivity
in these heterogeneous processes. Kinetic studies revealed that the
rate and yield of the reactions were essentially maintained during
recycling, which demonstrates that Pd-AmP-MCF and Pd-AmP-CNC are robust
and highly active in these oxidative cascade reactions. In addition,
inductively coupled plasma optical emisson spectroscopy (ICP-OES)
analysis and hot filtration test suggest that these processes most
likely proceed via a heterogeneous pathway. Recent progress
in our group has shown that the activity of Pd-AmP-MCF
and Pd-AmP-CNC could be improved even further by the addition of Ag+ to generate cationic Pd(II). Furthermore, intriguing solvent
effects were observed in a Pd-AmP-MCF-catalyzed oxidative cascade
process, and solvent-controlled chemoselective transformations were
developed based on this property of the catalyst. The heterogeneous
strategy of this Account provides solutions to palladium deactivation
and selectivity issues in Pd(II)-catalyzed oxidative cascade reactions
and enables efficient catalyst recycling, which will open up new opportunities
in oxidative cascade reactions.
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Affiliation(s)
- Man-Bo Li
- Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, P.R. China
- Hefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui 230601, P.R. China
| | - Jan-E. Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
- Department of Natural Sciences, Mid Sweden University, SE-85170 Sundsvall, Sweden
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50
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Schneider A, Jegl P, Hauer B. Stereoselektive gerichtete kationische Kaskaden ermöglicht durch molekulare Verankerung in Terpencyclasen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andreas Schneider
- Institut der Biochemie und technischen Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart-Vaihingen Deutschland
| | - Philipp Jegl
- Institut der Biochemie und technischen Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart-Vaihingen Deutschland
| | - Bernhard Hauer
- Institut der Biochemie und technischen Biochemie Universität Stuttgart Allmandring 31 70569 Stuttgart-Vaihingen Deutschland
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