1
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Su J, Guo Y, Li C, Song Q. Difluorocarbene-induced [1,2]- and [2,3]-Stevens rearrangement of tertiary amines. Nat Commun 2024; 15:4794. [PMID: 38839757 PMCID: PMC11153565 DOI: 10.1038/s41467-024-49054-x] [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: 02/02/2024] [Accepted: 05/23/2024] [Indexed: 06/07/2024] Open
Abstract
The [1,2]- and [2,3]-Stevens rearrangements are one of the most fascinating chemical bond reorganization strategies in organic chemistry, and they have been demonstrated in a wide range of applications, representing a fundamental reaction tactic for the synthesis of nitrogen compounds in chemical community. However, their applicabilities are limited by the scarcity of efficient, general, and straightforward methods for generating ammonium ylides. Herein, we report a general difluorocarbene-induced tertiary amine-involved [1,2]- and [2,3]-Stevens rearrangements stemmed from in situ generated difluoromethyl ammonium ylides, which allows for the rearrangements of versatile tertiary amines bearing either allyl, benzyl, or propargyl groups, resulting in the corresponding products in one reaction under the same reaction conditions with a general way. Broad substrate scope, simple operation, mild reaction conditions and late-stage modification of natural products highlight the advantages of this strategy, meanwhile, this general rearrangement reaction is believed to bring opportunities for the transformations of nitrogen ylides and the assembly of valuable tertiary amines and amino acids. This will further enrich the reaction repertoire of difluorocarbene species, facilitate the development of reactions involving difluoromethyl ammonium salts, and provide an avenue for the development of this type of rearrangement reactions.
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Affiliation(s)
- Jianke Su
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Yu Guo
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Chengbo Li
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China.
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China.
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China.
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China.
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2
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White CM, Cazares S, Gonzalez-Cortes ED, Driver TG. Iodine(III)-Catalyzed Oxidative Cyclization of Aryl Amines to Construct N-Alkylbenzimidazoles. J Org Chem 2024; 89:6590-6601. [PMID: 38613505 DOI: 10.1021/acs.joc.4c00346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2024]
Abstract
An I(III)-catalyzed oxidative cyclization reaction using selectfluor as the oxidant was developed that converts ortho-substituted anilines to benzimidazoles. The mild reaction requires as little as 0.5 mol % of iodobenzene, and its scope is broad: electron-withdrawing or electron-releasing groups on the aniline portion are tolerated, and cyclic or acyclic N-alkylamines are permitted as ortho-substituents. Preliminary mechanistic investigations suggest that benzimidazole formation occurs via cationic reactive intermediates, and an intramolecular kinetic isotope effect of 1.98 ± 0.05 was measured.
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Affiliation(s)
- Carmen Margaret White
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Sherlyn Cazares
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Efren D Gonzalez-Cortes
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Tom G Driver
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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3
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Zhou Q, Huang M, Shen Y, Chen Z, Xu L, Yang Z. Synthesis of gem-Difluorinated 2,3-Dihydrobenzofurans Using Freon-22 via [4 + 1] Annulation of Difluorocarbene and Antitumor Activity Evaluation. Org Lett 2024; 26:1212-1217. [PMID: 38300133 DOI: 10.1021/acs.orglett.4c00011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
As an inexpensive industrial chemical, chlorodifluoromethane (Freon-22), despite its relatively low reactivity, can serve as a practical CF2 source for the construction of gem-difluorinated ring structures. Here, we develop a protocol for the efficient assembly of valuable fluorinated 2,3-dihydrobenzofurans from the [4 + 1] annulation in good yields under basic conditions. The reliable practicability and scalability of the process have also been demonstrated by preparation at the multigram scale, late-stage modifications of pharmaceutical molecules, and potential antitumor potency.
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Affiliation(s)
- Qianying Zhou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
- Department of Radiology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Mi Huang
- Department of Clinical Sciences, Clinical Research Centre, Lund University, 21428 Malmö, Sweden
| | - Yongcun Shen
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Zhenling Chen
- School of Chemical Engineering, Guizhou Institute of Technology, Guiyang 550003, China
| | - Liying Xu
- Department of Radiology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Zhigang Yang
- Department of Radiology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
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4
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Chen D, Bao Y, Yan S, Wang J, Zhang Y, Li G. Photocatalytic Multicomponent Annulation of Amide-Anchored 1,7-Diynes Enabled by Deconstruction of Bromotrichloromethane. Molecules 2024; 29:782. [PMID: 38398533 PMCID: PMC10893216 DOI: 10.3390/molecules29040782] [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: 12/27/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
We present the first example of visible-light-mediated multicomponent annulation of 1,7-diynes by taking advantage of quadruple cleavage olf carbon-halogen bonds of BrCCl3 to generate a C1 synthon, which was adeptly applied to the preparation of skeletally diverse 3-benzoyl-quinolin-2(1H)-one acetates in moderate to good yields. Controlled experiments demonstrated that H2O acted as both oxygen and hydrogen sources, and gem-dichlorovinyl carbonyl compound exhibited as a critical intermediate in this process. The mechanistic pathway involves Kharasch-type addition/6-exo-dig cyclization/1,5-(SN")-substitution/elimination/binucleophilic 1,6-addition/proton transfer/tautomerization sequence.
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Affiliation(s)
- Daixiang Chen
- School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Yu Bao
- School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Shenghu Yan
- School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Jiayin Wang
- School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Yue Zhang
- School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA;
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5
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Abstract
ConspectusFluorine-containing compounds are extensively involved in various fields originating from intriguing and unique characteristics of fluorine atom; notably, in pharmaceuticals, the involvement of a fluorine atom or a fluorine-containing group is a chief technique for improving the pesticide effect and developing new drugs. Difluorocarbene, one of the most important and powerful fluorine-containing reagents, is widely employed and studied in many areas mainly to assemble gem-difluoromethyl molecules, including but not limited to the abundant reactions between difluorocarbene with nucleophilic substrates, Wittig reaction with ketones or aldehydes, cascade reaction with both a nucleophile and an electrophile, or [2+1] cycloaddition with alkenes or alkynes. However, its unconventional and intriguing protocols beyond as a difluoromethyl synthon have rarely been studied, and thus, it is highly desired given its abundance, inexpensiveness and peculiar properties. In this Account, we mainly discuss our discovery with unconventional transformations of difluorocarbene, instead of as a sole difluoromethyl source (different from other dihalocarbene), actually can serve as an electron acceptor to activate C-X bonds (X = N and O) and thus promote a myriad of fascinating transformations for the assembly of versatile valuable products with various aza-compounds (primary/secondary/tertiary amines as well as NH3 and NaNH2 and so on) and aliphatic ethers in the absence of transition metals and expensive ligands. Inspired by the electron-deficient characteristics of difluorocarbene, we first found that the isocyanides could be readily formed in situ when the unoccupied orbital of difluorocarbene meets the lone-pair of primary amines; in basic condition, a cascade defluorination and cyclizations could afford plethora of valuable N-containing heterocycles. Meanwhile, we disclosed that cyano anion could be accessible in situ as well when difluorocarbene and NaNH2 or NH3 were mixed up in suitable basic conditions, and thus a series of aryl nitrile compounds were obtained in the presence of Pd catalysis and ArI. Interestingly, when difluorocarbene encountered secondary amines, formamides were rendered under mild reactions. Of note, concomitant functionalizations of C and N moieties via cleavage of the unstrained C(sp3)-N bond in the absence of metal and oxidant are sparce, which indeed significantly add versatility and diversity to products. Gratifyingly, by uitilizing difluorocarbene and cyclic tertiary amines, we achieved difluorocarbene-mediated deconstructive functionalizations for the first time, showing successive C(sp3)-N bond scission of amines and simultaneous functionalization of C and N atoms which would be introduced into the products in the absence of transition metals and oxidants. This method provides a brand-new while very universal synthetic pathway to selectively cleave inert unactivated Csp3-N bonds, in which halodifluoromethyl reagents act as both C1 synthon and halo (Cl, Br, I) sources. Fascinatingly, nitrogen ylides are generated in situ from difluorocarbene and tertiary amines, and an intriguing and universal approach for deaminative arylation or alkenylation of tertiary amines was disclosed for the first time in appropriate basic conditions, which represents an intriguing reaction mode to lead to a formal transition-metal free Suzuki cross coupling. Besides, we also disclosed that difluorocarbene could proceed novel atom recombination to render meaningful 2-fluoroindoles or 3-(2,2-difluoroethyl)-2-fluoroindoles from ortho-vinylanilines, 3-fluorined oxindoles from 2-aminoarylketones, in which difluorocarbene acts as a C1 synthon and F1 source simultaneously. Last but not the least, we recently found that the lone-pair-electron of oxygen could trap difluorocarbene as well to form oxonium ylide, which eventually leads to C-O bond cleavage with the formation of difluoromethyl ethers.
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6
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Chen S, Huang H, Li X, Ma X, Su J, Song Q. Difluorocarbene-Enabled Synthesis of 3-Alkenyl-2-oxindoles from ortho-Aminophenylacetylenes. Org Lett 2023; 25:1178-1182. [PMID: 36757765 DOI: 10.1021/acs.orglett.3c00150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Herein, we report a transition-metal-free [4 + 1] cyclization pathway from difluorocarbene and ortho-amino aryl alkynone, rendering an effective and universal strategy for the construction of 3-alkenyl-2-oxindoles. Our strategy starts from cheap and accessible ortho-amino aryl alkynone instead of the direct indole skeleton; moreover, in situ generated difluorocarbene from commercially available halogenated difluoroalkylative reagents enables the cleavage of a C-N bond and formation of new C-N bonds and C-C bonds.
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Affiliation(s)
- Shanglin Chen
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, Fujian, China
| | - Hua Huang
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China
| | - Xin Li
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China
| | - Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, Fujian, China
| | - Jianke Su
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China
| | - Qiuling Song
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, Fujian, China.,Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen 361021, Fujian, China.,State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
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7
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Feng CC, Zhang SL. Direct formylation of phenols using difluorocarbene as a safe CO surrogate. Org Biomol Chem 2023; 21:728-731. [PMID: 36601719 DOI: 10.1039/d2ob02128e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A convenient method to prepare aryl formates is reported herein that exploits difluorocarbene to serve as a CO surrogate. This reaction is proposed to occur through a sequential O-difluoromethylation of phenol, followed by α-C-F bond functionalization of the resulting aryl difluoromethyl ether intermediate by phenol or moisture through fluorosemiacetal or orthoformate intermediates. Late-stage modification of biologically and materially active compounds is demonstrated.
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Affiliation(s)
- Cong-Cong Feng
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, China.
| | - Song-Lin Zhang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, China.
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8
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Si YX, Feng CC, Zhang SL. Three-Component Coupling of Anilines, Amines, and Difluorocarbene to Access Formamidines. J Org Chem 2022; 87:13564-13572. [PMID: 36260868 DOI: 10.1021/acs.joc.2c01069] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A one-pot three-component reaction of two anilines (or one aniline and one alkylamine) and in situ-generated difluorocarbene is developed herein to enable efficient construction of formamidines. Crucial formimidoyl fluoride intermediate RN═CHF is proposed from the reaction of a primary aniline and difluorocarbene. Ensuing nucleophilic iminyl substitution of this intermediate with a second amine allows cross-condensation of the two amines to produce formamidines. When only one type of primary aniline is used as the substrate, the difluoromethylated homo-condensation products can also be produced under a 1:1 molar ratio of aniline/difluorocarbene. Intramolecular variant of this method allows concise synthesis of benzimidazoquinazolines and nitrogen-fused/spirocyclic compounds, showing the potential of this method in organic synthesis. More interesting reactions are anticipated by exploiting the reactivity of difluorocarbene and primary amines to isocyanides or the formimidoyl fluoride intermediates.
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Affiliation(s)
- Yi-Xin Si
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Cong-Cong Feng
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Song-Lin Zhang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
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9
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Zhu Z, Xu Y, Krishnamurti V, Koch CJ, Ispizua-Rodriguez X, Barrett C, Prakash GS. Synthesis of difluoromethylated formimidamides from primary aryl amines using TMSCF2Br as a dual C1 synthon. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.110023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Fan Z, Ye M, Wang Y, Qiu J, Li W, Ma X, Yang K, Song Q. Enantioselective Copper-Catalyzed sp 2/sp 3 Diborylation of 1-Chloro-1-Trifluoromethylalkenes. ACS CENTRAL SCIENCE 2022; 8:1134-1144. [PMID: 36032759 PMCID: PMC9413839 DOI: 10.1021/acscentsci.2c00339] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Indexed: 05/03/2023]
Abstract
Fluorine-containing organoboron compounds have emerged as novel building blocks in chemical synthesis; among them, fluorinated sp2/sp3 diborylated compounds are particularly appealing, since they might undergo chemoselective and diversified transformations of different C-B bonds with fluorinated functionality, thus bringing versatility and complexity to the eventual products. However, expedient, synthetic strategies for the construction of such fluorinated diborylative compounds are very sparse. Herein, we disclose enantioselective Cu-catalyzed sp2/sp3 diborylations of 1-chloro-1-trifluoromethylalkenes, leading to diborylated compounds bearing a gem-difluoroalkenyl moiety; most intriguingly, the new formed C-B bonds include one stereoselective and optically pure Csp3-B bond. Further transformations on the eventual products demonstrated the values of our presented strategy.
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Affiliation(s)
- Zhenwei Fan
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Mingxing Ye
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Yahao Wang
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Jian Qiu
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Wangyang Li
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Xingxing Ma
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Kai Yang
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
| | - Qiuling Song
- Key
Laboratory of Molecule Synthesis and Function Discovery, Fujian Province
University, College of Chemistry at Fuzhou
University, Fuzhou, Fujian 350108, China
- Institute
of Next Generation Matter Transformation, College of Material Sciences
Engineering, Huaqiao University, Xiamen, Fujian 361021, China
- School
of Chemistry and Chemical Engineering, Henan
Normal University, Xinxiang, Henan 453007, China
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11
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Vinayagam V, Karre SK, Kasu SR, Srinath R, Naveen Babu Bathula HS, Sadhukhan SK. AlCl 3-Mediated CHF 2 Transfer and Cyclocondensation of Difluoromethoxy Functionalized o-Phenylenediamines to Access N-Substituted Benzimidazoles. Org Lett 2022; 24:6142-6147. [PMID: 35938941 DOI: 10.1021/acs.orglett.2c02231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report for the first time a transition-metal-free frustrated Lewis pair (FLP) catalyzed CHF2 group migration from an oxygen atom to the neighboring nitrogen atom, which led to the synthesis of N-substituted benzimidazoles at room temperature with excellent yields, broad functional group tolerance, and a short reaction time. The oxygen-attached difluoromethane acted as a C1 source in the synthesis of N-substituted benzimidazoles in the presence of AlCl3 by cleaving one C-O bond and two C-F bonds, resulting in formation of two new C-N bonds.
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Affiliation(s)
- Vinothkumar Vinayagam
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Satish Kumar Karre
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Sreenivasa Reddy Kasu
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Ravuri Srinath
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Hema Sundar Naveen Babu Bathula
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Subir Kumar Sadhukhan
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
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12
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Ge D, Chu XQ. Multiple-fold C–F bond functionalization for the synthesis of (hetero)cyclic compounds: fluorine as a detachable chemical handle. Org Chem Front 2022. [DOI: 10.1039/d1qo01749g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We highlighted the recent advances in the field of multiple-fold C–F bond functionalization for the synthesis of (hetero)cyclic compounds.
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Affiliation(s)
- Danhua Ge
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Xue-Qiang Chu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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13
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Yuan W, Guo L, Liu Y, Li Q, Shi J, Pan F. Transition‐Metal‐Free Intermolecular Chlorodifluoromethylthiolation of Alkenes and Alkynes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wan‐Qiang Yuan
- College of Chemistry and Materials Science Sichuan Normal University 5 Jingan Road Chengdu 610067 P. R. China
| | - Li‐Yun Guo
- College of Chemistry and Materials Science Sichuan Normal University 5 Jingan Road Chengdu 610067 P. R. China
| | - Yu‐Tao Liu
- College of Chemistry and Materials Science Sichuan Normal University 5 Jingan Road Chengdu 610067 P. R. China
| | - Qing Li
- College of Chemistry and Materials Science Sichuan Normal University 5 Jingan Road Chengdu 610067 P. R. China
| | - Jie Shi
- College of Chemistry and Materials Science Sichuan Normal University 5 Jingan Road Chengdu 610067 P. R. China
| | - Fei Pan
- College of Chemistry and Materials Science Sichuan Normal University 5 Jingan Road Chengdu 610067 P. R. China
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14
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Abstract
AbstractThe unique properties of fluorine-containing organic compounds make fluorine substitution attractive for the development of pharmaceuticals and various specialty materials, which have inspired the evolution of diverse C-F bond activation techniques. Although many advances have been made in functionalizations of activated C-F bonds utilizing transition metal complexes, there are fewer approaches available for nonactivated C-F bonds due to the difficulty in oxidative addition of transition metals to the inert C-F bonds. In this regard, using Lewis acid to abstract the fluoride and light/radical initiator to generate the radical intermediate have emerged as powerful tools for activating those inert C-F bonds. Meanwhile, these transition-metal-free processes are greener, economical, and for the pharmaceutical industry, without heavy metal residues. This review provides an overview of recent C-F bond activations and functionalizations under transition-metal-free conditions. The key mechanisms involved are demonstrated and discussed in detail. Finally, a brief discussion on the existing limitations of this field and our perspective are presented.
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15
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Su J, Hu X, Huang H, Guo Y, Song Q. Difluorocarbene enables to access 2-fluoroindoles from ortho-vinylanilines. Nat Commun 2021; 12:4986. [PMID: 34404806 PMCID: PMC8371155 DOI: 10.1038/s41467-021-25313-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 07/22/2021] [Indexed: 02/07/2023] Open
Abstract
2-Fluoroindoles as an important structural scaffold are widely existing in many bioactive or therapeutic agents. Despite their potential usefulness, efficient constructions of 2-fluoroindole derivatives are very sparce. The development of straightforward synthetic approaches to access 2-fluoroindoles is highly desirable for studying their fundamental properties and applications. Herein, we report an efficient and general strategy for the construction of 2-fluoroindoles in which a wide variety of 2-fluoroindoles were accessed with high efficiency and chemoselectivity. Instead of starting from indole skeletons, our strategy constructs indole scaffolds alongside the incorporation of fluorine atom on C2 position in a formal [4+1] cyclization from readily accessible ortho-vinylanilines and difluorocarbene. In our protocol, commercially accessible halodifluoroalkylative reagents provide one carbon and one fluorine atom by cleaving one C-N tertiary bond and forming one C-N bond and one C-C double bond with ortho-vinylanilines. Downstream transformations on 2-fluoroindoles lead to various valuable bioactive molecules which demonstrated significant synthetic advantages over previous reports. And mechanistic studies suggest that the reaction undergoes a cascade difluorocarbene-trapping and intramolecular Michael addition reaction followed by Csp3-F bond cleavage.
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Affiliation(s)
- Jianke Su
- grid.411404.40000 0000 8895 903XInstitute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian China
| | - Xinyuan Hu
- grid.411404.40000 0000 8895 903XInstitute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian China
| | - Hua Huang
- grid.411404.40000 0000 8895 903XInstitute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian China
| | - Yu Guo
- grid.411404.40000 0000 8895 903XInstitute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian China
| | - Qiuling Song
- grid.411404.40000 0000 8895 903XInstitute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian China ,grid.411604.60000 0001 0130 6528Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian China
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16
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Chen H, Wang L, Liu Y, Guo M, Zhao W, Tang X, Wang G. Copper Catalyzed Direct Synthesis of Unsymmetrically Substituted Oxalamides From Bromodifluoroacetamide and Tertiary Amines. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hongtai Chen
- Department of Chemistry, School of Science Tianjin University 135 Yaguan Road Tianjin 300072 P. R. China
| | - Lianxin Wang
- Department of Chemistry, School of Science Tianjin University 135 Yaguan Road Tianjin 300072 P. R. China
| | - Yujie Liu
- Department of Chemistry, School of Science Tianjin University 135 Yaguan Road Tianjin 300072 P. R. China
| | - Minjie Guo
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology Tianjin University 92 Weijin Road Tianjin 300072 P. R. China
| | - Wentao Zhao
- Department of Chemistry, School of Science Tianjin University 135 Yaguan Road Tianjin 300072 P. R. China
| | - Xiangyang Tang
- Department of Chemistry, School of Science Tianjin University 135 Yaguan Road Tianjin 300072 P. R. China
| | - Guangwei Wang
- Department of Chemistry, School of Science Tianjin University 135 Yaguan Road Tianjin 300072 P. R. China
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17
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Liu X, Sheng H, Zhou Y, Song Q. Pd-Catalyzed Assembly of Fluoren-9-ones by Merging of C–H Activation and Difluorocarbene Transfer. Org Lett 2021; 23:2543-2547. [DOI: 10.1021/acs.orglett.1c00467] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaobing Liu
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen 361021, Fujian, P. R. China
| | - Heyun Sheng
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen 361021, Fujian, P. R. China
| | - Yao Zhou
- College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, Hubei, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen 361021, Fujian, P. R. China
- Fujian University Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, Fujian, P. R. China
- State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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18
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Gao B, Ni Y, Liu X, Jiang T, Yan Q, Yang R, Zhang X. Copper‐Catalyzed Difluoroalkylation‐Thiolation of Alkenes Promoted by Na
2
S
2
O
5. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bao Gao
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Yingjie Ni
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Xiaojun Liu
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Tao Jiang
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Qian Yan
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Ruiting Yang
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Xiuli Zhang
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 200032 PR China
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19
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Jin S, Li SJ, Ma X, Su J, Chen H, Lan Y, Song Q. Elemental-Sulfur-Enabled Divergent Synthesis of Disulfides, Diselenides, and Polythiophenes from β-CF 3 -1,3-Enynes. Angew Chem Int Ed Engl 2021; 60:881-888. [PMID: 32985082 DOI: 10.1002/anie.202009194] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/15/2020] [Indexed: 02/03/2023]
Abstract
Divergent synthesis for precise constructions of cyclic unsymmetrical diaryl disulfides or diselenides and polythiophenes from CF3 -containing 1,3-enynes and S8 was developed when the ortho group is F, Cl, Br, and NO2 on aromatic rings. Meanwhile, disulfides (diselenides) were also quickly constructed when the ortho group is H. These transformations undergo cascade thiophene construction/selective C3-position thiolation process, featuring simple operations, divergent synthesis, broad substrate scope, readily available starting materials, and valuable products. A novel plausible radical annulation process was proposed and validated by DFT calculations for the first time. A series of derivatizations about the thiophene (TBT) and disulfides were also well-represented.
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Affiliation(s)
- Shengnan Jin
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering at, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian, 361021, P. R. China
| | - Shi-Jun Li
- College of Chemistry, and Institute of Green Catalysis, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China
| | - Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Jianke Su
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering at, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian, 361021, P. R. China
| | - Haohua Chen
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing, 400030, P. R. China
| | - Yu Lan
- College of Chemistry, and Institute of Green Catalysis, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan, 450001, P. R. China.,School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing, 400030, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering at, Huaqiao University, 668 Jimei Blvd, Xiamen, Fujian, 361021, P. R. China.,Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
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20
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Chu XQ, Zhi ML, Zhang SX, Wang YW, Rao W, Xu H, Shen ZL. Palladium-catalyzed defluorinative alkynylation of polyfluoroalkyl ketones with alkynes for the synthesis of fluorinated fused furans. Org Chem Front 2021. [DOI: 10.1039/d0qo01009j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A Pd-catalyzed C–F bond alkynylation of polyfluoroalkyl ketones with terminal alkynes for the synthesis of fluoroalkylated fused furans was developed.
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Affiliation(s)
- Xue-Qiang Chu
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Man-Ling Zhi
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Si-Xuan Zhang
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Ya-Wen Wang
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Haiyan Xu
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- China
| | - Zhi-Liang Shen
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
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21
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Difluoromethylation of alcohols with TMSCF2Br in water: A new insight into the generation and reactions of difluorocarbene in a two-phase system. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131676] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Liu Y, Luo W, Wang Z, Zhao Y, Zhao J, Xu X, Wang C, Li P. Visible-Light Photoredox-Catalyzed Formal [5 + 1] Cycloaddition of N-Tosyl Vinylaziridines with Difluoroalkyl Halides. Org Lett 2020; 22:9658-9664. [PMID: 33236913 DOI: 10.1021/acs.orglett.0c03718] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A visible-light photoredox-catalyzed formal [5 + 1] cycloaddition of N-tosyl vinylaziridines with difluoroalkyl halides as unique C1 synthons was developed. The procedure provides an efficient and practical method to synthesize diverse pyridines in moderate to good yields. The reaction underwent a radical-initiated kinetically controlled ring-opening of vinylaziridines and involved a key α,β-unsaturated imine intermediate, followed by an E2 elimination, a 6π electrocyclization, and defluorinated aromatization.
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Affiliation(s)
- Yantao Liu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Wen Luo
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Zhenjie Wang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Yuxin Zhao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Jingjing Zhao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Xuejun Xu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Chaojie Wang
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, People's Republic of China
| | - Pan Li
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People's Republic of China.,Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, People's Republic of China
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23
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Jin S, Li S, Ma X, Su J, Chen H, Lan Y, Song Q. Elemental‐Sulfur‐Enabled Divergent Synthesis of Disulfides, Diselenides, and Polythiophenes from β‐CF
3
‐1,3‐Enynes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shengnan Jin
- Institute of Next Generation Matter Transformation College of Material Sciences Engineering at Huaqiao University 668 Jimei Blvd Xiamen Fujian 361021 P. R. China
| | - Shi‐Jun Li
- College of Chemistry, and Institute of Green Catalysis Zhengzhou University 100 Science Avenue Zhengzhou Henan 450001 P. R. China
| | - Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery Fujian Province University College of Chemistry at Fuzhou University Fuzhou Fujian 350108 P. R. China
| | - Jianke Su
- Institute of Next Generation Matter Transformation College of Material Sciences Engineering at Huaqiao University 668 Jimei Blvd Xiamen Fujian 361021 P. R. China
| | - Haohua Chen
- School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 P. R. China
| | - Yu Lan
- College of Chemistry, and Institute of Green Catalysis Zhengzhou University 100 Science Avenue Zhengzhou Henan 450001 P. R. China
- School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation College of Material Sciences Engineering at Huaqiao University 668 Jimei Blvd Xiamen Fujian 361021 P. R. China
- Key Laboratory of Molecule Synthesis and Function Discovery Fujian Province University College of Chemistry at Fuzhou University Fuzhou Fujian 350108 P. R. China
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24
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Ma X, Song Q. Recent progress on selective deconstructive modes of halodifluoromethyl and trifluoromethyl-containing reagents. Chem Soc Rev 2020; 49:9197-9219. [PMID: 33146196 DOI: 10.1039/d0cs00604a] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Halodifluoromethyl and trifluoromethyl-containing compounds are widely employed in organic chemistry, pharmaceuticals and materials science. Therefore, their applications and transformations have received significant attention during the past few decades. The single, double, triple and quadruple cleavage of halodifluoromethyl compounds and various deconstructive modes of trifluoromethyl-containing compounds could generate a variety of synthons to prepare more valuable products. Herein, we summarize the most significant achievements in this field with an intriguing focus on results from the last decade.
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Affiliation(s)
- Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University Fuzhou, Fujian, 350108, China
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25
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Su J, Ma X, Ou Z, Song Q. Deconstructive Functionalizations of Unstrained Carbon-Nitrogen Cleavage Enabled by Difluorocarbene. ACS CENTRAL SCIENCE 2020; 6:1819-1826. [PMID: 33145418 PMCID: PMC7596867 DOI: 10.1021/acscentsci.0c00779] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Indexed: 05/03/2023]
Abstract
Transition-metal- or oxidant-promoted deconstructive functionalizations of noncyclic carbon-nitrogen bonds are well established, usually only leaving one moiety functionalized toward the final product. In contrast, concomitant C- and N-functionalizations via the unstrained C(sp3)-N bond under metal- and oxidant-free conditions are very rare, which would favorably confer versatility and product diversity. Disclosed herein is the first difluorocarbene-induced deconstructive functionalizations embodying successive C(sp3)-N bond cleavage of cyclic amines and synchronous functionalization of both constituent atoms which would be preserved in the eventual molecular outputs under transition-metal-free and oxidant-free conditions. Correspondent access to deuterated formamides with ample isotopic incorporation was demonstrated by a switch to heavy water which is conceivably useful in pharmaceutical sciences. The current strategy remarkably administers a very convenient, operationally simple and novel method toward molecular diversity from readily available starting materials. Therefore, we project that these findings would be of broad interest to research endeavors encompassing fluorine chemistry, carbene chemistry, C-N bond activation, as well as medicinal chemistry.
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Affiliation(s)
- Jianke Su
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Xingxing Ma
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Zongliang Ou
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Qiuling Song
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at
Fuzhou University, Fuzhou, Fujian 350108, China
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26
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Xie T, Zhang C, Zhang S, Rao W, Xu H, Shen Z, Chu X. Synthesis of Polycyclic Furan and Chromene Derivatives
via
Cascade Reactions Enabled by Cleavage of Multiple C(
sp
3
)−F Bonds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000660] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ting Xie
- Technical Institute of Fluorochemistry (TIF) Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing 211816 People's Republic of China
| | - Chen Zhang
- Technical Institute of Fluorochemistry (TIF) Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing 211816 People's Republic of China
| | - Si‐Xuan Zhang
- Technical Institute of Fluorochemistry (TIF) Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing 211816 People's Republic of China
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Haiyan Xu
- School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang Jiangsu 212003 People's Republic of China
| | - Zhi‐Liang Shen
- Technical Institute of Fluorochemistry (TIF) Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing 211816 People's Republic of China
| | - Xue‐Qiang Chu
- Technical Institute of Fluorochemistry (TIF) Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing 211816 People's Republic of China
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27
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Raja D, Philips A, Palani P, Lin WY, Devikala S, Senadi GC. Metal-Free Synthesis of Benzimidazoles via Oxidative Cyclization of d-Glucose with o-Phenylenediamines in Water. J Org Chem 2020; 85:11531-11540. [PMID: 32786645 DOI: 10.1021/acs.joc.0c01053] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
d-Glucose has been identified as an efficient C1 synthon in the synthesis of benzimidazoles from o-phenylenediamines via an oxidative cyclization strategy. Isotopic studies with 13C6-d-glucose and D2O unambiguously confirmed the source of methine. The notable features of this method include the following: broad functional group tolerance, a biorenewable methine source, excellent reaction yields, a short reaction time, water as an environmentally benign solvent, and the synthesis of vitamin B12 component on the gram scale.
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Affiliation(s)
- Dineshkumar Raja
- Department of Chemistry, SRM Institute of Science and Technology, SRM Nagar, Chengalpattu District, Kattankulathur, Tamil Nadu 603203, India
| | - Abigail Philips
- Department of Chemistry, SRM Institute of Science and Technology, SRM Nagar, Chengalpattu District, Kattankulathur, Tamil Nadu 603203, India
| | - Pushbaraj Palani
- Department of Chemistry, SRM Institute of Science and Technology, SRM Nagar, Chengalpattu District, Kattankulathur, Tamil Nadu 603203, India
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan First Road, Sanmin District, Kaohsiung City 807, Taiwan
| | - Sundaramurthy Devikala
- Department of Chemistry, SRM Institute of Science and Technology, SRM Nagar, Chengalpattu District, Kattankulathur, Tamil Nadu 603203, India
| | - Gopal Chandru Senadi
- Department of Chemistry, SRM Institute of Science and Technology, SRM Nagar, Chengalpattu District, Kattankulathur, Tamil Nadu 603203, India
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28
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Kuang Z, Chen H, Qiu J, Ou Z, Lan Y, Song Q. Cu-Catalyzed Regio- and Stereodivergent Chemoselective sp/sp 1,3- and 1,4-Diborylations of CF3-Containing 1,3-Enynes. Chem 2020. [DOI: 10.1016/j.chempr.2020.06.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Ma X, Yu X, Huang H, Zhou Y, Song Q. Synthesis of Thiazoles and Isothiazoles via Three-Component Reaction of Enaminoesters, Sulfur, and Bromodifluoroacetamides/Esters. Org Lett 2020; 22:5284-5288. [DOI: 10.1021/acs.orglett.0c01275] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Xiaoxia Yu
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Hua Huang
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Yao Zhou
- College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, Hubei 435002, China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
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30
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Jin S, Kuang Z, Song Q. Precise Construction of SCF2H or SeCF2H Groups on Heteroarenes Generated in Situ from CF3-Containing 1,3-Enynes. Org Lett 2020; 22:615-619. [DOI: 10.1021/acs.orglett.9b04389] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shengnan Jin
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian, China 361021
| | - Zhijie Kuang
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian, China 361021
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian, China 361021
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, China 350108
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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31
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Wang Y, Zhou Y, Song Q. [3+1+1] type cyclization of ClCF2COONa for the assembly of imidazoles and tetrazoles via in situ generated isocyanides. Chem Commun (Camb) 2020; 56:6106-6109. [DOI: 10.1039/d0cc01919d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A facile synthesis of imidazoles and tetrazoles via [3+1+1] type cyclization of ClCF2COONa is developed.
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Affiliation(s)
- Ya Wang
- Institute of Next Generation Matter Transformation
- College of Materials Science & Engineering at Huaqiao University
- 668 Jimei Blvd, Xiamen
- Fujian
- P. R. China
| | - Yao Zhou
- College of Chemistry and Chemical Engineering
- Hubei Normal University
- Huangshi 435002
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Materials Science & Engineering at Huaqiao University
- 668 Jimei Blvd, Xiamen
- Fujian
- P. R. China
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32
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Yu C, Ma X, Song Q. Palladium-catalyzed cyanation of aryl halides with in situ generated CN− from ClCF2H and NaNH2. Org Chem Front 2020. [DOI: 10.1039/d0qo00775g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Pd-catalyzed cyanation of aryl halides with in situ generated CN− anions is described.
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Affiliation(s)
- Changjiang Yu
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Xingxing Ma
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
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33
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Chu XQ, Xie T, Wang YW, Li XR, Rao W, Xu H, Shen ZL. Synthesis of di(hetero)aryl sulfides by defluorinative sulfenylation of polyfluoroalkyl ketones with sodium sulfinates or arylsulfonyl chlorides. Chem Commun (Camb) 2020; 56:8699-8702. [DOI: 10.1039/d0cc03303k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cascade reactions of α-perfluoroalkyl ketones with sodium sulfinates or arylsulfonyl chlorides that allowed the efficient synthesis of fluoroalkylated di(hetero)aryl sulfide derivatives under transition metal-free conditions were developed.
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Affiliation(s)
- Xue-Qiang Chu
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Ting Xie
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Ya-Wen Wang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Xiang-Rui Li
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Haiyan Xu
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- China
| | - Zhi-Liang Shen
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
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34
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Ma X, Huang H, Su J, Song Z, Nakano T, Song Q. Synthesis of CF
2
H‐Containing Oxime Ethers Derivatives from ClCF
2
H,
tert
‐Butyl Nitrile and Indoles. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900401] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
| | - Hua Huang
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
| | - Jianke Su
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
| | - Zhiyi Song
- Institute for Catalysis (ICAT), Hokkaido University, N 21, W 10, Kita‐ku Sapporo 001‐0021 Japan
| | - Tamaki Nakano
- Institute for Catalysis (ICAT), Hokkaido University, N 21, W 10, Kita‐ku Sapporo 001‐0021 Japan
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
- Key Laboratory of Molecule Synthesis and Function DiscoveryFujian Province University, College of Chemistry, Fuzhou University Fuzhou Fujian 350108 China
- State Key Laboratroy of Organometallic Chemistry, Shanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032 China
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35
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Ma X, Song Q. tert-Butyl Nitrite Mediated Synthesis of Fluorinated O-Alkyloxime Ether Derivatives. Org Lett 2019; 21:7375-7379. [PMID: 31465233 DOI: 10.1021/acs.orglett.9b02689] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A tert-butyl nitrite (TBN)-mediated synthesis of fluorinated O-alkyloxime ether derivatives with bromodifluoroalkyl reagents as the fluorine sources has been developed. A variety of halodifluorinated compounds were found compatible, delivering the desired products in moderate to excellent yields. This transformation features a simple operation, can be done in air, and found to involve radicals. This protocol represents a straightforward approach to access various fluorinated O-alkyloxime ether derivatives.
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Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering , Huaqiao University , 668 Jimei Blvd , Xiamen , Fujian 361021 , China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering , Huaqiao University , 668 Jimei Blvd , Xiamen , Fujian 361021 , China.,Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University , College of Chemistry at Fuzhou University , Fuzhou , Fujian 350108 , China.,State Key Laboratroy of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , CAS, Shanghai , 200032 , China
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