1
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Kachore A, Aggarwal V, Bala E, Singh H, Guleria S, Sharma S, Pathan S, Saima, Selvaraj M, Assiri MA, Kumar Verma P. Recent Advances in Direct Regioselective C-H Chlorination at Aromatic and Aliphatic. Chem Asian J 2024; 19:e202400391. [PMID: 38825568 DOI: 10.1002/asia.202400391] [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: 04/22/2024] [Revised: 05/31/2024] [Accepted: 05/31/2024] [Indexed: 06/04/2024]
Abstract
Direct installation of key functionalities in a molecule through C-H bond activation is one of the thrust areas as well as challenging task in organic synthesis. Particularly, introduction of chlorine in a molecule imparts additional benefits for further functionalizations as well as improves the electronic behaviour such as lipophilicity and polarity towards drug development process. The chlorinated molecules have also been established as efficient biologically relevant scaffolds. Current manuscript has been focused on the direct installation of the chlorine atom at various aromatic and aliphatic positions to produce functional molecules. The key highlight of the manuscript belongs to the site selectivity (regioselectivity) for the installation of chlorine functionality. Manuscript describes the advanced methods developed for the direct C-H chlorination reactions and further simplified for the chlorination reactions at various positions including aromatic (o-, m-, and p-), benzylic, heteroaromatic, and aliphatic positions. Directing groups (DGs) and the coordination with the catalyst is the key for the enhancement of regioselectivities during direct C-H chlorination reactions.
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Affiliation(s)
- Ankit Kachore
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Varun Aggarwal
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Ekta Bala
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Hemant Singh
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Saksham Guleria
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Sakshi Sharma
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Sameer Pathan
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Saima
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
| | - Manickam Selvaraj
- Department of Chemistry, Faculty of Science, King Khalid University, PO Box 9004, 61413, Abha, Saudi Arabia
- Research Centre for Advanced Materials Science (RCAMS), King Khalid University, PO Box 9004, Abha, 61413, Saudi Arabia
| | - Mohammed A Assiri
- Department of Chemistry, Faculty of Science, King Khalid University, PO Box 9004, 61413, Abha, Saudi Arabia
- Research Centre for Advanced Materials Science (RCAMS), King Khalid University, PO Box 9004, Abha, 61413, Saudi Arabia
| | - Praveen Kumar Verma
- School of Advanced Chemical Sciences, Shoolini University of Biotechnology and Management Sciences, 173229, Solan, H.P., India
- Department of Oral and Maxillofacial Surgery, Saveetha Dental College and Hospitals, SIMATS, Saveetha University, 600077, Chennai, Tamil Nadu, India
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2
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Demonti L, Joven-Sancho D, Saffon-Merceron N, Baya M, Nebra N. Synthesis and Lewis Acid Properties of Neutral Silver(III) Adducts Containing the Ag III(CF 3) 3 Moiety. Chemistry 2024; 30:e202400881. [PMID: 38567827 DOI: 10.1002/chem.202400881] [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: 03/01/2024] [Indexed: 05/09/2024]
Abstract
The acetonitrile AgIII complex [AgIII(CF3)3(NCCH3)] (2) has been reported independently by Eujen and Naumann in the last century, albeit with intriguing NMR discrepancy. In their reports, 2 was claimed to be obtained starting from either [AgIII(CF3)3Cl]- (3⋅Cl) or [AgIII(CF3)4]- (1) via halide abstraction using AgNO3 or acidic treatment, resp. These two synthetic routes are herein reinvestigated. The feasibility of Naumann's method is demonstrated, thus providing 2 yet accompanied by its s-triazinyl derivative [AgIII(CF3)3(C6H9N3)] (2'). The formation of 2' is unprecedented and was thereby investigated. Both 2 and 2' were isolated in pure fashion and fully characterized. In turn, halide extraction from 3⋅Cl leads to the AgIII-ONO2 anion 5 instead of 2, as evidenced by NMR spectroscopy, EA and Sc-XRD.
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Affiliation(s)
- Luca Demonti
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA)., Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Daniel Joven-Sancho
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA)., Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse ICT-UAR2599, Université Paul Sabatier, CNRS, 31062, Toulouse Cedex, France
| | - Miguel Baya
- Instituto de Síntesis Química y Catálisis Homogénea (iSQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA)., Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
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3
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Hanazawa N, Kuriyama M, Yamamoto K, Onomura O. Synthesis of ω-Chloroalkyl Aryl Ketones via C-C Bond Cleavage of tert-Cycloalkanols with Tetramethylammonium Hypochlorite. Molecules 2024; 29:1874. [PMID: 38675694 PMCID: PMC11055113 DOI: 10.3390/molecules29081874] [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: 03/15/2024] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
An oxidative C-C bond cleavage of tert-cycloalkanols with tetramethylammonium hypochlorite (TMAOCl) has been developed. TMAOCl is easy to prepare from tetramethylammonium hydroxide, and the combination of TMAOCl and AcOH effectively promoted the C-C bond cleavage in a two-phase system without additional phase-transfer reagents. Unstrained tert-cycloalkanols were transformed into ω-chloroalkyl aryl ketones in moderate to excellent yields under metal-free and mild reaction conditions.
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Affiliation(s)
| | | | | | - Osamu Onomura
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan (M.K.); (K.Y.)
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4
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Shen D, Sun C, Han Y, Luo Z, Ren T, Zhang Q, Huang W, Xie J, Jia Y, Chao M. Additive-free oxychlorination of unsaturated C-C bonds with tert-butyl hypochlorite and water. Org Biomol Chem 2024; 22:3080-3085. [PMID: 38563263 DOI: 10.1039/d4ob00003j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Herein we report an additive-free protocol for the facile synthesis of α,α-dichloroketones and α-chlorohydrins from various aryl terminal, diaryl internal, and aliphatic terminal alkynes and alkenes, respectively. The commercially available tert-butyl hypochlorite (tBuOCl) was employed as a suitable chlorinating reagent, being accompanied by the less harmful tBuOH as the by-product. In addition, the oxygen atoms in the products came from water rather than molecular oxygen, based on the 18O-labelling experiments. Meanwhile, the diastereoselectivity of the Z- and the corresponding E-alkenes has been compared and rationalized. Using a group of control experiments, the possible mechanisms have been proposed as the initial electrophilic chlorination of unsaturated C-C bonds in a Markovnikov-addition manner in general followed by a nucleophilic addition with water. This work simplified the oxychlorination method with a mild chlorine source and a green oxygen source under ambient conditions.
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Affiliation(s)
- Duyi Shen
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Chaoyue Sun
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Yun Han
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Zhen Luo
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Ting Ren
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Qin Zhang
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Wenting Huang
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Jianru Xie
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Ying Jia
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
| | - Mianran Chao
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, P. R. China.
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5
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He K, Mei Y, Jin N, Liu Y, Pan F. Visible light-promoted difluoromethylthiolation of cycloalkanols by C-C bond cleavage. Org Biomol Chem 2024; 22:1782-1787. [PMID: 38329275 DOI: 10.1039/d3ob02078a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
A mild and general methodology for the difluoromethylthiolation of cycloalkanols has been developed by employing N-difluoromethylthiophthalimide as the SCF2H radical source, in combination with an acridinium-derived organo-photosensitizer, under redox-neutral conditions. This reaction protocol demonstrates high efficiency, scalability, and mild reaction conditions, thus presenting a green approach for the rapid synthesis of distal difluoromethylthiolated alkyl ketones that are challenging to be synthesized through alternative means.
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Affiliation(s)
- Kehan He
- School of Science, Xichang University, Xichang 615000, P. R. China.
| | - Yan Mei
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, P. R. China.
| | - Na Jin
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, P. R. China.
| | - Yutao Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, P. R. China.
| | - Fei Pan
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, P. R. China.
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6
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Ajitha M, Haines BE, Musaev DG. Mechanism and Selectivity of Copper-Catalyzed Bromination of Distal C(sp 3)-H Bonds. Organometallics 2023; 42:2467-2476. [PMID: 37772274 PMCID: PMC10526628 DOI: 10.1021/acs.organomet.2c00554] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Indexed: 02/25/2023]
Abstract
Unactivated C(sp3)-H bonds are the most challenging substrate class for transition metal-catalyzed C-H halogenation. Recently, the Yu group [Liu, T.; Myers, M. C.; Yu, J. Q. Angew. Chem., Int. Ed.2017, 56 (1), 306-309] has demonstrated that a CuII/phenanthroline catalyst and BrN3, generated in situ from NBS and TMSN3 precursors, can achieve selective C-H bromination distal to a directing group. The current understanding of the mechanism of this reaction has left numerous questions unanswered. Here, we investigated the mechanism of Cu-catalyzed C(sp3)-H bromination with distal site selectivity using density functional theory calculations. We found that this reaction starts with the Br-atom transfer from BrN3 to the Cu center that occurs via a small energy barrier at the singlet-triplet state seam of crossing. In the course of this reaction, the presence of the N-H bond in the substrate is critically important and acts as a directing group for enhancing the stability of the catalyst-substrate interaction and for the recruitment of the substrate to the catalyst. The required C-centered radical substrate formation occurs via direct C-H dehydrogenation by the Cu-coordinated N3 radical, rather than via the previously proposed N-H bond dehydrogenation and then the 1,5-H transfer from the γ-(C-H) bond to the N-radical center pathway. The C-H bond activation by the azide radical is a regioselectivity-controlling step. The following bromination of the C-centered radical by the Cu-coordinated bromine completes the product formation. This reaction step is the rate-limiting step, occurs at the singlet-to-triplet state seam of the crossing point, and is exergonic.
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Affiliation(s)
- Manjaly
J. Ajitha
- Cherry L. Emerson Center for Scientific
Computation, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | | | - Djamaladdin G. Musaev
- Cherry L. Emerson Center for Scientific
Computation, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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7
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Jang Y, Deng W, Sprague IS, Lindsay VNG. Divergent Synthesis of β-Fluoroamides via Silver-Catalyzed Oxidative Deconstruction of Cyclopropanone Hemiaminals. Org Lett 2023; 25:5389-5394. [PMID: 37413978 PMCID: PMC10829026 DOI: 10.1021/acs.orglett.3c01992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
An expedient approach for the synthesis of challenging β-fluoroamides from readily accessible cyclopropanone equivalents is reported. Following the addition of pyrazole used here as a transient leaving group, silver-catalyzed regiospecific ring-opening fluorination of the resulting hemiaminal leads to a β-fluorinated N-acylpyrazole intermediate reactive to substitution with amines, ultimately affording β-fluoroamides. The process could also be extended to the synthesis of β-fluoroesters and γ-fluoroalcohols via the addition of alcohols or hydrides as terminal nucleophiles, respectively.
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Affiliation(s)
- Yujin Jang
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Weixia Deng
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Ivan S. Sprague
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Vincent N. G. Lindsay
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
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8
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Ren ZG, Yu WL, Zheng HX, Xu PF. PCET-Mediated Ring-Opening Alkenylation of Cycloalkanols via Dual Photoredox and Cobalt Catalysis. Org Lett 2023; 25:93-98. [PMID: 36546834 DOI: 10.1021/acs.orglett.2c03894] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The construction of molecular skeletons and modification of molecules using widely available and easily prepared alcohols as radical precursors for coupling reactions are significant and challenging subjects. We herein report a straightforward strategy for the dehydrogenative ring-opening alkenylation of cycloalkanols with alkenes by combining a proton-coupled electron transfer strategy and a dual photoredox and cobalt catalysis system. With this approach, a series of distally unsaturated ketones were obtained in 17-83% yields with high E selectivity.
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Affiliation(s)
- Zi-Gang Ren
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Wan-Lei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hai-Xue Zheng
- State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.,State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, China
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9
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Chen Y, Hee S, Liu X, Das S, Hong D, Leung PH, Li Y, Li J, Liu J. ICl-Mediated Functional Group Interconversion from Methyl Homopropargyl Ether to α-Iodo-γ-chloroketone. J Org Chem 2022; 87:15129-15138. [PMID: 36331559 PMCID: PMC10174042 DOI: 10.1021/acs.joc.2c01638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An ICl-mediated highly chemo- and regioselective functional group interconversion from methyl homopropargyl ether to α-iodo-γ-chloro-ketone is reported. Density functional theory (DFT)-calculated reaction coordinate and potential energy surface support the high chemo-selectivity observed for the formation of α-iodo-γ-chloroketone over furan. The five-membered oxonium ring formation-ring opening mechanism is a potential template for the preparation of polyfunctionalized carbonyl compounds.
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Affiliation(s)
- Yu Chen
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York11367, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York10016, United States
| | - Samual Hee
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York11367, United States
| | - Xiaochen Liu
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York11367, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York10016, United States
| | - Sajal Das
- Department of Chemistry, University of North Bengal, Darjeeling734 013, India
| | - Dongsub Hong
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York11367, United States
| | - Pak-Hing Leung
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Jiaming Li
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York11367, United States
| | - Jianbo Liu
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York11367, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York10016, United States
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10
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Wang Z, Chen X, Hu Y, Li H, Yang YF, Liu Y, Jin H, Zhou B. Deconstructive isomerization of azetidinols via C-C bond cleavage enabled by N-heterocyclic carbene (NHC) catalysis. Chem Commun (Camb) 2022; 58:9294-9297. [PMID: 35904428 DOI: 10.1039/d2cc03104c] [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
Herein, we describe an N-heterocyclic carbene (NHC)-catalyzed deconstructive isomerization of azetidinols via an inert C-C bond cleavage. It provides a direct and supplementary pathway to access α-amino ketone and oxazol-2-one derivatives in moderate to good yields. DFT calculation supports the proposed mechanism in which NHC undergoes a concerted proton transfer and ring-opening process. This reaction features non-metal catalysis, simple reaction operation, excellent regioselectivity and gram-scale synthesis.
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Affiliation(s)
- Zhen Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Xue Chen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yunayuan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Huiling Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yun-Fang Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yunkui Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Hongwei Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Bingwei Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
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11
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Zhai S, Qiu S, Yang S, Gao X, Feng X, Yun C, Han N, Niu Y, Wang J, Zhai H. Facile access to β-hydroxyl ketones via a cobalt-catalyzed ring-opening/hydroxylation cascade of cyclopropanols. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.06.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Fe-Catalyzed Ring-Opening Reactions of Siloxy Cyclopropanes with Alkenes and TBHP: Synthesis of 4-Ester Peroxides. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Giannopoulos V, Smonou I. Asymmetric Reduction of α,α‐Dichloro‐β‐Keto Esters by NADPH‐Dependent Ketoreductases. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vasileios Giannopoulos
- University of Crete Department of Chemistry: Panepistemio Kretes Tmema Chemeias Chemistry GREECE
| | - Ioulia Smonou
- University of Crete Department of Chemistry Campus Voutes, Heraklion 71003 Heraklion, Crete GREECE
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14
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Yu S, Ai Y, Hu L, Lu G, Duan C, Ma Y. Palladium-Catalyzed Stagewise Strain-Release-Driven C-C Activation of Bicyclo[1.1.1]pentanyl Alcohols. Angew Chem Int Ed Engl 2022; 61:e202200052. [PMID: 35332648 DOI: 10.1002/anie.202200052] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Indexed: 12/20/2022]
Abstract
A palladium-catalyzed chemoselective coupling of readily available bicyclo[1.1.1]pentanyl alcohols (BCP-OH) with various halides is reported, which offers expedient approaches to a wide range of cyclobutanone and β,γ-enone skeletons via single or double C-C activation. The chemistry shows a broad substrate scope in terms of both the range of BCP-OH and halides including a series of natural product derivatives. Moreover, dependency of reaction chemodivergence on base additive has been investigated through experimental and density functional theory (DFT) studies, which is expected to significantly enrich the reaction modes and increase the synthetic potential of BCP-OH in preparing more complex molecules.
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Affiliation(s)
- Songjie Yu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Yinan Ai
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Lingfei Hu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China
| | - Gang Lu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China
| | - Chunying Duan
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
| | - Yue Ma
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China
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15
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Yu S, Ai Y, Hu L, Lu G, Duan C, Ma Y. Palladium‐Catalyzed Stagewise Strain‐Release‐Driven C−C Activation of Bicyclo[1.1.1]pentanyl Alcohols. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Songjie Yu
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Yinan Ai
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Lingfei Hu
- School of Chemistry and Chemical Engineering Key Laboratory of Colloid and Interface Chemistry Ministry of Education Shandong University Jinan 250100 China
| | - Gang Lu
- School of Chemistry and Chemical Engineering Key Laboratory of Colloid and Interface Chemistry Ministry of Education Shandong University Jinan 250100 China
| | - Chunying Duan
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
| | - Yue Ma
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 China
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16
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Smonou I, Giannopoulos V, Katsoulakis N. Dichlorination of β-Keto Esters and 1,3-Diketones Mediated by Oxone/Aluminum Trichloride Mixture in Aqueous Medium. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0041-1737412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractA new method for the α,α-dichlorination of β-keto esters using Oxone/aluminum trichloride mixture in aqueous medium has been developed. This useful process has also been applied successfully for the dichlorination of 1,3-diketones. The dichlorinated compounds have been produced in one step, high yields, and short reaction times.
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17
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Chen Y, Zhang G, Guo C, Lan P, Banwell MG, He Y. Silver‐Promoted Radical Ring‐Opening
/
Pyridylation of Cyclobutanols with
N
‐Methoxypyridinium Salts. Chemistry 2022; 28:e202104627. [DOI: 10.1002/chem.202104627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Chen
- Institute for Advanced and Applied Chemical Synthesis Jinan University Guangzhou 510632 Guangdong P. R. China
- College of Pharmacy Jinan University Guangzhou 510632 Guangdong P. R. China
| | - Guang‐Yi Zhang
- Institute for Advanced and Applied Chemical Synthesis Jinan University Guangzhou 510632 Guangdong P. R. China
- College of Pharmacy Jinan University Guangzhou 510632 Guangdong P. R. China
| | - Chan Guo
- Institute for Advanced and Applied Chemical Synthesis Jinan University Guangzhou 510632 Guangdong P. R. China
- College of Pharmacy Jinan University Guangzhou 510632 Guangdong P. R. China
| | - Ping Lan
- Institute for Advanced and Applied Chemical Synthesis Jinan University Guangzhou 510632 Guangdong P. R. China
- College of Pharmacy Jinan University Guangzhou 510632 Guangdong P. R. China
| | - Martin G. Banwell
- Institute for Advanced and Applied Chemical Synthesis Jinan University Guangzhou 510632 Guangdong P. R. China
- College of Pharmacy Jinan University Guangzhou 510632 Guangdong P. R. China
| | - Yu‐Tao He
- Institute for Advanced and Applied Chemical Synthesis Jinan University Guangzhou 510632 Guangdong P. R. China
- College of Pharmacy Jinan University Guangzhou 510632 Guangdong P. R. China
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18
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Computational Study of Key Mechanistic Details for a Proposed Copper (I)-Mediated Deconstructive Fluorination of N-Protected Cyclic Amines. Top Catal 2022; 65:418-432. [PMID: 35197715 DOI: 10.1007/s11244-021-01443-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Using calculations, we show that a proposed Cu(I)-mediated deconstructive fluorination of N-benzoylated cyclic amines with Selectfluor® is feasible and may proceed through: (a) substrate coordination to a Cu(I) salt, (b) iminium ion formation followed by conversion to a hemiaminal, and (c) fluorination involving C-C cleavage of the hemiaminal. The iminium ion formation is calculated to proceed via a F-atom coupled electron transfer (FCET) mechanism to form, formally, a product arising from oxidative addition coupled with electron transfer (OA + ET). The subsequent β-C-C cleavage/fluorination of the hemiaminal intermediate may proceed via either ring-opening or deformylative fluorination pathways. The latter pathway is initiated by opening of the hemiaminal to give an aldehyde, followed by formyl H-atom abstraction by a TEDA2+ radical dication, decarbonylation, and fluorination of the C3-radical center by another equivalent of Selectfluor®. In general, the mechanism for the proposed Cu(I)- mediated deconstructive C-H fluorination of N-benzoylated cyclic amines (LH) by Selectfluor® was calculated to proceed analogously to our previously reported Ag(I)-mediated reaction. In comparison to the Ag(I)-mediated process, in the Cu(I)-mediated reaction the iminium ion formation and hemiaminal fluorination have lower associated energy barriers, whereas the product release and catalyst re-generation steps have higher barriers.
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19
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Wang K, Zeng R. Photoinduced Fe-Catalyzed Bromination and Iodination of Unstrained Cyclic Alcohols. Org Chem Front 2022. [DOI: 10.1039/d2qo00709f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a photoinduced iron catalysis for the efficient C─C bond cleavage and bromination or iodination of unstrained tertiary cycloalkanols with NBS/NIS. The reaction features good functional group tolerance and...
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20
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Wang J, Li X. Asymmetric β-Arylation of Cyclopropanols Enabled by Photoredox and Nickel Dual Catalysis. Chem Sci 2022; 13:3020-3026. [PMID: 35382467 PMCID: PMC8905987 DOI: 10.1039/d1sc07237d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 02/16/2022] [Indexed: 11/21/2022] Open
Abstract
The enantioselective functionalization and transformation of readily available cyclopropyl compounds are synthetically appealing yet challenging topics in organic synthesis. Here we report an asymmetric β-arylation of cyclopropanols with aryl bromides...
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Affiliation(s)
- Jianhua Wang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), NMPA Key Laboratory for Technology Research and Evaluation of Drug Products, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University Jinan Shandong 250012 China
| | - Xiaoxun Li
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), NMPA Key Laboratory for Technology Research and Evaluation of Drug Products, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University Jinan Shandong 250012 China
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21
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Zou JP, Li CK, Shoberu A. Silver-Catalyzed Radical Ring-Opening of Cycloalkanols for the Synthesis of distal acylphosphine oxides. Org Chem Front 2022. [DOI: 10.1039/d2qo00359g] [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
A novel silver-catalyzed ring-opening approach for the regioselective synthesis of distal acylphosphine oxides is described. A variety of distal acylphosphine oxides were prepared from the reaction of tertiary cycloalkanols (4...
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22
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Chang L, An Q, Duan L, Feng K, Zuo Z. Alkoxy Radicals See the Light: New Paradigms of Photochemical Synthesis. Chem Rev 2021; 122:2429-2486. [PMID: 34613698 DOI: 10.1021/acs.chemrev.1c00256] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Alkoxy radicals are highly reactive species that have long been recognized as versatile intermediates in organic synthesis. However, their development has long been impeded due to a lack of convenient methods for their generation. Thanks to advances in photoredox catalysis, enabling facile access to alkoxy radicals from bench-stable precursors and free alcohols under mild conditions, research interest in this field has been renewed. This review comprehensively summarizes the recent progress in alkoxy radical-mediated transformations under visible light irradiation. Elementary steps for alkoxy radical generation from either radical precursors or free alcohols are central to reaction development; thus, each section is categorized and discussed accordingly. Throughout this review, we have focused on the different mechanisms of alkoxy radical generation as well as their impact on synthetic utilizations. Notably, the catalytic generation of alkoxy radicals from abundant alcohols is still in the early stage, providing intriguing opportunities to exploit alkoxy radicals for diverse synthetic paradigms.
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Affiliation(s)
- Liang Chang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 200032 Shanghai, China.,School of Pharmacy, Nanjing University of Chinese Medicine, 210023 Nanjing, China
| | - Qing An
- School of Physical Science and Technology, ShanghaiTech University, 201210 Shanghai, China
| | - Lingfei Duan
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 200032 Shanghai, China
| | - Kaixuan Feng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 200032 Shanghai, China
| | - Zhiwei Zuo
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 200032 Shanghai, China
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23
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Affiliation(s)
- Yen-Chu Lu
- Department of Chemistry, Rice University, 6500 Main St., Houston, Texas 77005, United States
| | - Julian G. West
- Department of Chemistry, Rice University, 6500 Main St., Houston, Texas 77005, United States
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24
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Oeser P, Edlová T, Čubiňák M, Tobrman T. Transition‐Metal‐Free Ring‐Opening Reaction of 2‐Halocyclobutanols through Ring Contraction. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Petr Oeser
- Department of Organic Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Tereza Edlová
- Department of Organic Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Marek Čubiňák
- Department of Organic Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Tomáš Tobrman
- Department of Organic Chemistry University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic
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25
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Yamamoto K, Toguchi H, Kuriyama M, Watanabe S, Iwasaki F, Onomura O. Electrophotochemical Ring-Opening Bromination of tert-Cycloalkanols. J Org Chem 2021; 86:16177-16186. [PMID: 34461014 DOI: 10.1021/acs.joc.1c01264] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An electrophotochemical ring-opening bromination of unstrained tert-cycloalkanols has been developed. This electrophotochemical method enables the oxidative transformation of cycloalkanols with 5- to 7-membered rings into synthetically useful ω-bromoketones without the use of chemical oxidants or transition-metal catalysts. Alkoxy radical species would be key intermediates in the present transformation, which generate through homolysis of the O-Br bond in hypobromite intermediates under visible light irradiation.
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Affiliation(s)
- Kosuke Yamamoto
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Hiroyuki Toguchi
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Masami Kuriyama
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Shin Watanabe
- Tsukuba Research Laboratories, Tokuyama Corporation, 40 Wadai, Tsukuba, Ibaraki 300-4247, Japan
| | - Fumiaki Iwasaki
- Tsukuba Research Laboratories, Tokuyama Corporation, 40 Wadai, Tsukuba, Ibaraki 300-4247, Japan
| | - Osamu Onomura
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
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26
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Liu S, Bai M, Xu PF, Sun QX, Duan XH, Guo LN. Copper-catalyzed radical ring-opening halogenation with HX. Chem Commun (Camb) 2021; 57:8652-8655. [PMID: 34373865 DOI: 10.1039/d1cc03013b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient copper-catalyzed radical ring-opening halogenation with HX (aq) is described. This protocol features redox-neutral conditions, green halogen sources, and a broad substrate scope, providing practical access to distally chlorinated, brominated and iodinated alkyl ketones and alkyl nitriles with moderate to good yields.
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Affiliation(s)
- Shuai Liu
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China.
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27
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Wu P, Ma S. Halogen-Substituted Allenyl Ketones through Ring Opening of Nonstrained Cycloalkanols. Org Lett 2021; 23:2533-2537. [PMID: 33733787 DOI: 10.1021/acs.orglett.1c00452] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient synthesis of halogen-substituted allenyl ketones via Ag-catalyzed oxidative ring opening of allenyl cyclic alcohols under mild reaction conditions has been achieved. The reaction features a wide substrate scope and excellent regioselectivity. The synthetic potential of the products has been demonstrated by their conversion to stereodefined alkenes and heterocyclic compounds.
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Affiliation(s)
- Penglin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, P. R. China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
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28
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Roque JB, Sarpong R, Musaev DG. Key Mechanistic Features of the Silver(I)-Mediated Deconstructive Fluorination of Cyclic Amines: Multistate Reactivity versus Single-Electron Transfer. J Am Chem Soc 2021; 143:3889-3900. [DOI: 10.1021/jacs.0c13061] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jose B. Roque
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Djamaladdin G. Musaev
- Cherry L. Emerson Center for Scientific Computation, and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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29
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Lu YC, Jordan HM, West JG. Rapid and scalable synthesis of fluoroketones via cerium-mediated C-C bond cleavage. Chem Commun (Camb) 2021; 57:1871-1874. [PMID: 33502408 DOI: 10.1039/d0cc08183c] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ketones with remote fluorination are an important motif in the synthesis of bioactive molecules. Here we demonstrate that ceric ammonium nitrate (CAN) is able to produce this functionality under incredibly mild conditions and short reaction times (30 min) while eliminating the need for precious metals in previous methods. Importantly, this method allows the efficient synthesis of a wide variety of γ-fluoroketones and is highly scalable. Preliminary mechanistic studies suggest this reaction proceeds through a radical pathway.
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Affiliation(s)
- Yen-Chu Lu
- Department of Chemistry, Rice University, 6500 Main St, Houston, TX, USA.
| | - Helen M Jordan
- Department of Chemistry, Rice University, 6500 Main St, Houston, TX, USA.
| | - Julian G West
- Department of Chemistry, Rice University, 6500 Main St, Houston, TX, USA.
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30
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Wang Z, Hu Y, Jin H, Liu Y, Zhou B. Nickel-Catalyzed Arylation/Alkenylation of tert-Cyclobutanols with Aryl/Alkenyl Triflates via a C -C Bond Cleavage. J Org Chem 2021; 86:466-474. [PMID: 33252235 DOI: 10.1021/acs.joc.0c02209] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein, we first present a nickel-catalyzed arylation and alkenylation of tert-cyclobutanols with aryl/alkenyl triflates via a C-C bond cleavage. An array of γ-substituted ketones was obtained in moderate-to-good yields, thus featuring earth-abundant nickel catalysis, broad substrate scope, and simple reaction conditions. Preliminary mechanistic experiments indicated that β-carbon elimination pathways might be involved in the catalytic cycle.
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Affiliation(s)
- Zhen Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yuanyuan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hongwei Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yunkui Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Bingwei Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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31
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Kumar Ghosh M, Roy B, Sarkar D. Regioselective C(sp
2
)−C(sp
3
) Oxidative Bond Cleavage of 1‐(1‐Hydroxyalkyl) naphthalen‐2‐ols: First Synthesis of 1‐Azido‐halo‐naphthalene‐2(1
H
)‐ones. Isr J Chem 2020. [DOI: 10.1002/ijch.202000082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Barnali Roy
- National Institute of Technology Rourkela Odisha 769008 India
| | - Debayan Sarkar
- National Institute of Technology Rourkela Odisha 769008 India
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32
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An Z, Liu Y, Sun Y, Yan R. TFA-Catalyzed [3+2] Spiroannulation of Cyclobutanols: A Route to Spiro[cyclobuta[a]indene-7,1'-cyclobutane] Skeletons. Chem Asian J 2020; 15:3812-3815. [PMID: 32997399 DOI: 10.1002/asia.202001048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/27/2020] [Indexed: 12/15/2022]
Abstract
A straightforward method for the synthesis of spiro[cyclobuta[a]indene-7,1'-cyclobutane] derivatives from cyclobutanols has been developed via one-pot [3+2] spiroannulation. A series of new spiro[cyclobuta[a]indene-7,1'-cyclobutane] derivatives are facilely synthesized in good yields under mild reaction conditions.
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Affiliation(s)
- Zhenyu An
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yafeng Liu
- Chemical Science and Engineering College, North Minzu University, Yinchuan, 750000, P. R. China
| | - Yanwei Sun
- Research Institute of Exploration & Development, Tuha Oilfield Company, Xinjiang, 830000, P. R. China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
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33
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Tsui E, Wang H, Knowles RR. Catalytic generation of alkoxy radicals from unfunctionalized alcohols. Chem Sci 2020; 11:11124-11141. [PMID: 33384861 PMCID: PMC7747465 DOI: 10.1039/d0sc04542j] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 09/21/2020] [Indexed: 12/12/2022] Open
Abstract
Alkoxy radicals have long been recognized as powerful synthetic intermediates with well-established reactivity patterns. Due to the high bond dissociation free energy of aliphatic alcohol O-H bonds, these radicals are difficult to access through direct homolysis, and conventional methods have instead relied on activation of O-functionalized precursors. Over the past decade, however, numerous catalytic methods for the direct generation of alkoxy radicals from simple alcohol starting materials have emerged and created opportunities for the development of new transformations. This minireview discusses recent advances in catalytic alkoxy radical generation, with particular emphasis on progress toward the direct activation of unfunctionalized alcohols enabled by transition metal and photoredox catalysis.
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Affiliation(s)
- Elaine Tsui
- Department of Chemistry , Princeton University , Princeton , NJ 08544 , USA .
| | - Huaiju Wang
- Department of Chemistry , Princeton University , Princeton , NJ 08544 , USA .
| | - Robert R Knowles
- Department of Chemistry , Princeton University , Princeton , NJ 08544 , USA .
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34
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Zhu C, Zhang H, Ji M, Wei Y, Chen H, Wu X. Radical-Mediated Hetaryl Functionalization of Nonactivated Alkenes through Distal ipso-Migration of O- or S-Hetaryls. Synlett 2020. [DOI: 10.1055/s-0040-1705968] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractA radical-mediated hetaryl functionalization of nonactivated alkenes through distal ipso-migration of O- or S-containing hetaryls was developed. Furyl, benzofuryl, thienyl, and benzothienyl groups showed satisfactory migratory abilities. A variety of heteroatom-centered radicals, including azido, trifluoromethylsulfanyl, and silyl radicals readily trigger the migration cascade, and a new C–heteroatom and C–C bond are concomitantly constructed in the reaction. This method provides an efficient approach to the synthesis of high-valued complex O- or S-hetaryl compounds.
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Affiliation(s)
- Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
| | - Huihui Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
| | - Meishan Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
| | - Youhao Wei
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
| | - Haodong Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
| | - Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
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35
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McDonald TR, Mills LR, West MS, Rousseaux SAL. Selective Carbon–Carbon Bond Cleavage of Cyclopropanols. Chem Rev 2020; 121:3-79. [DOI: 10.1021/acs.chemrev.0c00346] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tyler R. McDonald
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - L. Reginald Mills
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Michael S. West
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Sophie A. L. Rousseaux
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
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36
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Abstract
This article reviews synthetic transformations involving cleavage of a carbon-carbon bond of a four-membered ring, with a particular focus on the examples reported during the period from 2011 to the end of 2019. Most significant is the progress of catalytic reactions involving oxidative addition of carbon-carbon bonds onto transition metals or β-carbon elimination of transition metal alkoxides. When they are looked at from synthetic perspectives, they offer unique and efficient methods to build complex natural products and structures that are difficult to construct by conventional methods. On the other hand, β-scission of radical intermediates has also attracted increasing attention as an alternative elementary step to cleave carbon-carbon bonds. Its site-selectivity is often complementary to that of transition metal-catalyzed reactions. In addition, Lewis acid-mediated and thermally induced ring-opening of cyclobutanone derivatives has garnered renewed attention. On the whole, these examples demonstrate unique synthetic potentials of structurally strained four-membered ring compounds for the construction of organic skeletons.
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Affiliation(s)
- Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Naoki Ishida
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
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37
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Wu L, Wang L, Chen P, Guo Y, Liu G. Enantioselective Copper‐Catalyzed Radical Ring‐Opening Cyanation of Cyclopropanols and Cyclopropanone Acetals. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000202] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lianqian Wu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Lei Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Pinghong Chen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yin‐Long Guo
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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38
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Sakurai S, Tsuzuki S, Sakamoto R, Maruoka K. Cu-Catalyzed Generation of Alkyl Radicals from Alkylsilyl Peroxides and Subsequent C(sp 3)-C(sp 2) Cross-Coupling with Arylboronic Acids. J Org Chem 2020; 85:3973-3980. [PMID: 31939666 DOI: 10.1021/acs.joc.9b03294] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This work describes a novel and practical method for the Cu-catalyzed C(sp3)-C(sp2) cross-coupling of alkylsilyl peroxides with arylboronic acids. The reductive cleavage of the O-O bond of alkylsilyl peroxides and the desired cross-coupling reactions to afford alkyl-substituted aromatic rings proceed smoothly at room temperature promoted by simple Cu-based catalysts and do not require activation by visible light. The results of mechanistic investigations support a radical-mediated C(sp3)-C(sp2) bond formation via β-scission of the alkoxy radicals generated from the alkylsilyl peroxides.
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Affiliation(s)
- Shunya Sakurai
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Saori Tsuzuki
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Ryu Sakamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.,Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan.,School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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39
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Shi JL, Wang Y, Wang Z, Dou B, Wang J. Ring-opening iodination and bromination of unstrained cycloalkanols through β-scission of alkoxy radicals. Chem Commun (Camb) 2020; 56:5002-5005. [DOI: 10.1039/d0cc01720e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ring-opening iodination or bromination of unstrained cycloalkanols with NaI or NaBr and PhI(OAc)2 under visible light irradiation is developed.
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Affiliation(s)
- Jiang-Ling Shi
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Yuankai Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Zixuan Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Bowen Dou
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
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40
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Wang J, Pang YB, Tao N, Zeng RS, Zhao Y. Mn-Enabled Radical-Based Alkyl-Alkyl Cross-Coupling Reaction from 4-Alkyl-1,4-dihydropyridines. J Org Chem 2019; 84:15315-15322. [PMID: 31671948 DOI: 10.1021/acs.joc.9b02323] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Highly efficient alkylation of β-chloro ketones and their derivatives was achieved by means of domino dehydrochlorination/Mn-enabled radical-based alkyl-alkyl cross-coupling reaction. In situ-generated α,β-unsaturated ketones and their analogues were identified as the reaction intermediates. Known bioactive compounds, such as melperone and azaperone, could be easily prepared from β-chloropropiophenone in two steps.
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Affiliation(s)
- Jie Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , China
| | - Yu-Bo Pang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , China
| | - Na Tao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , China
| | - Run-Sheng Zeng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , China
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41
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Allen BDW, Hareram MD, Seastram AC, McBride T, Wirth T, Browne DL, Morrill LC. Manganese-Catalyzed Electrochemical Deconstructive Chlorination of Cycloalkanols via Alkoxy Radicals. Org Lett 2019; 21:9241-9246. [PMID: 31687826 PMCID: PMC7007279 DOI: 10.1021/acs.orglett.9b03652] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
![]()
A manganese-catalyzed
electrochemical deconstructive chlorination
of cycloalkanols has been developed. This electrochemical method provides
access to alkoxy radicals from alcohols and exhibits a broad substrate
scope, with various cyclopropanols and cyclobutanols converted into
synthetically useful β- and γ-chlorinated ketones (40
examples). Furthermore, the combination of recirculating flow electrochemistry
and continuous inline purification was employed to access products
on a gram scale.
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Affiliation(s)
- Benjamin D W Allen
- Cardiff Catalysis Institute , School of Chemistry, Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Mishra Deepak Hareram
- Cardiff Catalysis Institute , School of Chemistry, Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Alex C Seastram
- Cardiff Catalysis Institute , School of Chemistry, Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Tom McBride
- Cardiff Catalysis Institute , School of Chemistry, Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Thomas Wirth
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Duncan L Browne
- Cardiff Catalysis Institute , School of Chemistry, Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
| | - Louis C Morrill
- Cardiff Catalysis Institute , School of Chemistry, Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , U.K
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42
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Morcillo SP. Radical‐Promoted C−C Bond Cleavage: A Deconstructive Approach for Selective Functionalization. Angew Chem Int Ed Engl 2019; 58:14044-14054. [DOI: 10.1002/anie.201905218] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Sara P. Morcillo
- Departamento de Química Orgánica Facultad de Ciencias Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
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43
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Morcillo SP. Radical‐Promoted C−C Bond Cleavage: A Deconstructive Approach for Selective Functionalization. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905218] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sara P. Morcillo
- Departamento de Química Orgánica Facultad de Ciencias Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
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44
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Zhang YH, Zhang WW, Zhang ZY, Zhao K, Loh TP. Manganese-Catalyzed Ring-Opening Coupling Reactions of Cyclopropanols with Enones. Org Lett 2019; 21:5101-5105. [DOI: 10.1021/acs.orglett.9b01703] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yong-Hui Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
- BGI-Shenzhen, Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Wen-Wei Zhang
- BGI-Shenzhen, Beishan Industrial Zone, Yantian District, Shenzhen 518083, China
| | - Ze-Yu Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Kai Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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45
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Sivaguru P, Wang Z, Zanoni G, Bi X. Cleavage of carbon–carbon bonds by radical reactions. Chem Soc Rev 2019; 48:2615-2656. [DOI: 10.1039/c8cs00386f] [Citation(s) in RCA: 165] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This review provides insights into the in situ generated radicals triggered carbon–carbon bond cleavage reactions.
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Affiliation(s)
- Paramasivam Sivaguru
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
| | - Zikun Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
| | | | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
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46
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Sheng J, Liu J, Chen L, Zhang L, Zheng L, Wei X. Silver-catalyzed cascade radical cyclization of 2-(allyloxy)arylaldehydes with cyclopropanols: access to chroman-4-one derivatives. Org Chem Front 2019. [DOI: 10.1039/c9qo00292h] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A convenient silver-catalyzed cascade radical cyclization of 2-(allyloxy)arylaldehydes with cyclopropanols was developed to synthesize carbonyl-containing alkyl-substituted chroman-4-one derivatives.
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Affiliation(s)
- Jie Sheng
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Jidan Liu
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
| | - Liuqing Chen
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Lingling Zhang
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Liyao Zheng
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Xingchuan Wei
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
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47
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Wu X, Zhu C. Recent advances in alkoxy radical-promoted C–C and C–H bond functionalization starting from free alcohols. Chem Commun (Camb) 2019; 55:9747-9756. [DOI: 10.1039/c9cc04785a] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This feature article summarizes our recent achievements in alkoxy radical-promoted C–C and C–H bond functionalization starting from free alcohols.
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Affiliation(s)
- Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
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48
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Jiang H, Zhang Y, Xiong W, Cen J, Wang L, Cheng R, Qi C, Wu W. A Three-Phase Four-Component Coupling Reaction: Selective Synthesis of o-Chloro Benzoates by KCl, Arynes, CO2, and Chloroalkanes. Org Lett 2018; 21:345-349. [DOI: 10.1021/acs.orglett.8b03193] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Yu Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Wenfang Xiong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Jinghe Cen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Lu Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Ruixiang Cheng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Chaorong Qi
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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49
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Guo J, Xu X, Xing Q, Gao Z, Gou J, Yu B. Furfuryl Cation Induced Cascade Formal [3 + 2] Cycloaddition/Double Ring-Opening/Chlorination: An Approach to Chlorine-Containing Complex Triazoles. Org Lett 2018; 20:7410-7414. [PMID: 30412412 DOI: 10.1021/acs.orglett.8b03121] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A TiCl4-promoted cascade formal [3 + 2] cycloaddition/double ring-opening/chlorination of 2-furylcyclobutanols with alkyl or aryl azides is described. This highly efficient transformation involves the formation/cleavage of several C-N, C-Cl, C-C, and C-O bonds in a single operation. It enables the quick construction of trisubstituted 1,2,3-triazoles with an ( E)-enone moiety and a 3-chloropropyl unit. The chlorinated products are readily transformed into other structurally diverse analogues.
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Affiliation(s)
- Jiawei Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices , Shaanxi Normal University , Xi'an 710062 , China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
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50
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Wang D, Mao J, Zhu C. Visible light-promoted ring-opening functionalization of unstrained cycloalkanols via inert C-C bond scission. Chem Sci 2018; 9:5805-5809. [PMID: 30079191 PMCID: PMC6050598 DOI: 10.1039/c8sc01763h] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 06/08/2018] [Indexed: 12/11/2022] Open
Abstract
Described herein is a novel, useful, visible light-promoted ring-opening functionalization of unstrained cycloalkanols. Upon scission of an inert cyclic C-C σ-bond, a set of medium- and large-sized rings are readily brominated under mild reaction conditions to afford the corresponding distal bromo-substituted alkyl ketones that are hard to synthesize otherwise. The products are versatile building blocks, which are easily converted to other valuable molecules in one-step operation. This protocol is also applicable to the unprecedented ring-opening cyanation and alkynylation of unstrained cycloalkanols.
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Affiliation(s)
- Dongping Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry , Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road , Suzhou , Jiangsu 215123 , China .
| | - Jincheng Mao
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu 610500 , China
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry , Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road , Suzhou , Jiangsu 215123 , China .
- Key Laboratory of Synthetic Chemistry of Natural Substances , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
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