1
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Cobalt-Catalyzed C–C Coupling Reactions with Csp3 Electrophiles. TOP ORGANOMETAL CHEM 2023. [DOI: 10.1007/3418_2023_83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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2
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Zhang H. A new protocol for synthesizing diarylmethanes using a benzyltitanium reagent as a nucleophile. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198221091941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The first palladium-catalyzed cross-coupling of various substituted benzyltitaniums with aryl triflates is presented for the synthesis of diarylmethanes in yields of up to 94% through highly selective C–O bond functionalization. The benzyltitaniums act as nucleophiles to realize the C(sp2)–C(sp3) cross-coupling with high efficiency in short reaction times. The reactions proceed at 60°C and show excellent functional groups tolerance.
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Affiliation(s)
- He Zhang
- Department of Chemical and Environmental Engineering, Hebei Chemical and Pharmaceutical College, Shijiazhuang, People’s Republic of China
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3
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Zhang K, Provot O, Alami M, Tran C, Hamze A. Pd-Catalyzed Coupling of N-Tosylhydrazones with Benzylic Phosphates: Toward the Synthesis of Di- or Tri-Substituted Alkenes. J Org Chem 2022; 87:1249-1261. [PMID: 35015524 DOI: 10.1021/acs.joc.1c02580] [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
This study shows that various di- and tri-substituted alkenes with high chemoselectivity were obtained in good to high yields by coupling N-tosylhydrazones (NTHs) with benzylic phosphates as electrophilic partners. The obtained new catalytic system consisted of PdCl2(CH3CN)2/dppp, LiOtBu as a base, and cyclopentyl methyl ether as a green solvent. In addition, we performed a gram-scale transformation using NTH derivatives and benzylic phosphates having a C sp2-Cl bond. The latter was used as a starting point for further postfunctionalization of the key intermediates.
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Affiliation(s)
- Kena Zhang
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Olivier Provot
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Mouad Alami
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Christine Tran
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Abdallah Hamze
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
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4
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Yamamoto Y, Takase T, Kuroyanagi E, Yasui T. Synthesis of difluoromethylated diarylmethanes via Fe(OTf) 3-catalyzed Friedel-Crafts reaction of 2,2-difluoro-1-arylethyl phosphates. Chem Commun (Camb) 2021; 57:3877-3880. [PMID: 33871534 DOI: 10.1039/d1cc00765c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Fe(OTf)3-catalyzed Friedel-Crafts reaction of 2,2-difluoro-1-arylethyl phosphates with electron-rich (hetero)arenes afforded difluoromethylated diarylmethanes. Control experiments showed that Fe(OTf)3 behaves as the Lewis acid, and that the phosphate leaving group and o- or p-alkoxy substituents on the substrates are necessary for the Fe(OTf)3-catalyzed reaction to proceed under mild conditions.
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Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Tomoya Takase
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Eisuke Kuroyanagi
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Takeshi Yasui
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
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5
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V. Singh F, B. Kole P. Recent Development on the Ring Transformation Reactions: Synthesis of Functionalized Benzenes, N-Heterocycles and Fused Ring Systems. HETEROCYCLES 2021. [DOI: 10.3987/rev-20-sr(k)8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Xie S, Li S, Ma W, Xu X, Jin Z. Chelation-directed remote meta-C-H functionalization of aromatic aldehydes and ketones. Chem Commun (Camb) 2019; 55:12408-12411. [PMID: 31566641 DOI: 10.1039/c9cc05807a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We disclose herein the development of a versatile 1,2-diol directing template for palladium-catalyzed remote meta-C-H functionalization of aromatic aldehydes and ketones. In situ-generation of acetals and ketals, as well as removal afterwards, makes the C-H bond functionalization process more straightforward and efficient. This also represents the first example of chelation-directed meta-C-H functionalization of aromatic aldehydes and ketones.
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Affiliation(s)
- Shuguang Xie
- State Key Laboratory and Institute of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Sen Li
- State Key Laboratory and Institute of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Wenqian Ma
- State Key Laboratory and Institute of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Xiaohua Xu
- State Key Laboratory and Institute of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
| | - Zhong Jin
- State Key Laboratory and Institute of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China.
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7
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Laskar RA, Yoshikai N. Cobalt-Catalyzed, N–H Imine-Directed Arene C–H Benzylation with Benzyl Phosphates. J Org Chem 2019; 84:13172-13178. [DOI: 10.1021/acs.joc.9b01775] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roshayed Ali Laskar
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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8
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Beyond Friedel and Crafts: Directed Alkylation of C−H Bonds in Arenes. Angew Chem Int Ed Engl 2019; 58:7202-7236. [DOI: 10.1002/anie.201806629] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 08/13/2018] [Indexed: 11/07/2022]
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9
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Evano G, Theunissen C. Jenseits von Friedel und Crafts: dirigierte Alkylierung von C‐H‐Bindungen in Arenen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201806629] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gwilherm Evano
- Laboratoire de Chimie OrganiqueService de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F.D. Roosevelt 50, CP160/06 1050 Brüssel Belgien
| | - Cédric Theunissen
- Laboratoire de Chimie OrganiqueService de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F.D. Roosevelt 50, CP160/06 1050 Brüssel Belgien
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10
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1385] [Impact Index Per Article: 230.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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11
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Liu P, Chen C, Cong X, Tang J, Zeng X. Chromium-catalyzed para-selective formation of quaternary carbon centers by alkylation of benzamide derivatives. Nat Commun 2018; 9:4637. [PMID: 30401829 PMCID: PMC6219510 DOI: 10.1038/s41467-018-07069-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 10/09/2018] [Indexed: 01/01/2023] Open
Abstract
Selective creation of quaternary carbon centers has been a long-standing challenge in synthetic chemistry. We report here the chromium-catalyzed, para-selective formation of arylated quaternary carbon centers by alkylative reactions of benzamide derivatives with tertiary alkylmagnesium bromides at room temperature. The reaction, which was enabled by a low-cost chromium(III) salt combined with trimethylsilyl bromide, introduces a sterically bulky tertiary alkyl scaffold on the para-position of benzamide derivatives in a highly selective fashion without either isomerization of the tertiary alkyl group or formation of ortho-alkylated byproducts. Forming low-valent Cr species in situ by reaction of CrCl3 with t-BuMgBr accompanied by evolution of hydrogen can be considered, which serves as reactive species to promote the reaction. The para-alkylation likely occurs via a radical-type nucleophilic substitution of imino-coordination benzimidate intermediate.
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Affiliation(s)
- Pei Liu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
- Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an, 710072, China
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China
| | - Changpeng Chen
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China
| | - Xuefeng Cong
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China
| | - Jinghua Tang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China
| | - Xiaoming Zeng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China.
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China.
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12
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Pichette Drapeau M, Tlili A, Zaid Y, Toummini D, Ouazzani Chahdi F, Sotiropoulos JM, Ollevier T, Taillefer M. Transition-Metal-Free Synthesis of Biarylmethanes from Aryl Iodides and Benzylic Ketones. Chemistry 2018; 24:17449-17453. [PMID: 30169893 DOI: 10.1002/chem.201804415] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 12/20/2022]
Abstract
An original metal-free procedure for the synthesis of biarylmethanes is disclosed herein. The reactions occur with high selectivity starting from aryl iodides and benzylic ketones in the presence of superbasic media (CsOH/DMSO). This procedure allows a straightforward access to a wide range of biarylmethane derivatives substituted with electron-withdrawing and -donating substituents.
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Affiliation(s)
- Martin Pichette Drapeau
- Département de chimie, Pavillon Alexandre-Vachon Université Laval, 1045 avenue de la Médecine, Québec (Qc, G1V 0A6, Canada.,Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296, Montpellier, France
| | - Anis Tlili
- Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296, Montpellier, France.,Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246), Univ Lyon, Université Lyon 1, CNRS, 43 Bd du 11 Novembre 1918, 69622, Villeurbanne, France
| | - Yassir Zaid
- Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296, Montpellier, France.,Laboratoire chimie organique appliquée LCOA, Faculté des Sciences et Techniques, 30000, Fès, Morocco
| | - Dounia Toummini
- Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296, Montpellier, France.,Laboratoire chimie organique appliquée LCOA, Faculté des Sciences et Techniques, 30000, Fès, Morocco
| | - Fouad Ouazzani Chahdi
- Laboratoire chimie organique appliquée LCOA, Faculté des Sciences et Techniques, 30000, Fès, Morocco
| | - Jean-Marc Sotiropoulos
- CNRS/Univ. Pau & Pays Adour, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, IPREM UMR-CNRS 5254, Hélioparc 2 av. P. Angot, 64053, Pau, France
| | - Thierry Ollevier
- Département de chimie, Pavillon Alexandre-Vachon Université Laval, 1045 avenue de la Médecine, Québec (Qc, G1V 0A6, Canada
| | - Marc Taillefer
- Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296, Montpellier, France
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13
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Reddy BRP, Chowdhury S, Auffrant A, Gosmini C. Cobalt-Catalyzed Formation of Functionalized Diarylmethanes from Benzylmesylates and Aryl Halides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800468] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Sushobhan Chowdhury
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Audrey Auffrant
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Corinne Gosmini
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
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14
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Tang J, Liu P, Zeng X. N-Heterocyclic carbene–chromium-catalyzed alkylative cross-coupling of benzamide derivatives with aliphatic bromides. Chem Commun (Camb) 2018; 54:9325-9328. [DOI: 10.1039/c8cc05026k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Described here is a chromium-catalyzed alkylative cross-coupling of benzamide derivatives with aliphatic electrophiles under mild conditions.
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Affiliation(s)
- Jinghua Tang
- Frontier Institute of Science and Technology
- Xi’an Jiaotong University
- Xi’an 710054
- China
- Key Laboratory of Green Chemistry & Technology
| | - Pei Liu
- Frontier Institute of Science and Technology
- Xi’an Jiaotong University
- Xi’an 710054
- China
- Key Laboratory of Green Chemistry & Technology
| | - Xiaoming Zeng
- Frontier Institute of Science and Technology
- Xi’an Jiaotong University
- Xi’an 710054
- China
- Key Laboratory of Green Chemistry & Technology
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15
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Sun Q, Yoshikai N. Cobalt-catalyzed C(sp2)–H/C(sp3)–H coupling via directed C–H activation and 1,5-hydrogen atom transfer. Org Chem Front 2018. [DOI: 10.1039/c7qo00906b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A cobalt catalyst promotes C(sp2)–H/C(sp3)–H coupling through a merger of directed C(sp2)–H activation and 1,5-hydrogen atom transfer.
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Affiliation(s)
- Qiao Sun
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
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16
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Lee PS, Xu W, Yoshikai N. Directed C-H Alkenylation of Aryl Imines with Alkenyl Phosphates Promoted by a Cobalt-N-Heterocyclic Carbene Catalyst. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701105] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Pin-Sheng Lee
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Wengang Xu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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17
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Affiliation(s)
- Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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18
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Li B, Fang SL, Huang DY, Shi BF. Ru-Catalyzed Meta-C–H Benzylation of Arenes with Toluene Derivatives. Org Lett 2017; 19:3950-3953. [DOI: 10.1021/acs.orglett.7b01529] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Li
- Department
of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Sheng-Long Fang
- Department
of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Dan-Ying Huang
- School of Chemical & Environmental Engineering, Wuyi University, Jiangmen 529020, China
| | - Bing-Feng Shi
- Department
of Chemistry, Zhejiang University, Hangzhou 310027, China
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19
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Chan CK, Tsai YL, Chang MY. Construction of Nitrated Benzo[3.3.1]bicyclic Acetal/Ketal Core via Nitration of o-Carbonyl Allylbenzenes. Org Lett 2017; 19:1358-1361. [PMID: 28257215 DOI: 10.1021/acs.orglett.7b00245] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intramolecular annulation of o-carbonyl allylbenzenes was achieved to construct novel nitrated [6,6,6]tricycles having an acetal or ketal motif in good yields. The expeditious one-step nitration route provides 4 or 5 new bond formations, including 2 or 3 C-N bonds and 2 C-O bonds. The structural framework of benzobicycle [3.3.1] is confirmed by X-ray crystallographic analysis. A plausible mechanism is proposed.
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Affiliation(s)
- Chieh-Kai Chan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Yu-Lin Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
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20
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Kowalska E, Bałczewski P. Ultrasound assisted Bradsher reaction in aqueous and non-aqueous media: First use of ultrasounds in electrophilic aromatic cyclisation leading to polyacenes. ULTRASONICS SONOCHEMISTRY 2017; 34:743-753. [PMID: 27773301 DOI: 10.1016/j.ultsonch.2016.07.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 06/21/2016] [Accepted: 07/14/2016] [Indexed: 06/06/2023]
Abstract
The present work describes the first use of ultrasounds in the Bradsher cyclisation of activated and non-activated ortho-formyl diarylmethanes. This reaction is also the first example of electrophilic, aromatic cyclisation assisted by ultrasounds which leads to pure polycyclic, fused aromatic hydrocarbons containing 3 and 4 fused rings in excellent yields. The reaction proceeds not only in aqueous but also in non-aqueous media at milder conditions (room temperature) and in much shorter reaction times than in conventional protocols.
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Affiliation(s)
- Emilia Kowalska
- Group of Synthesis of Functional Materials, Department of Heteroorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland.
| | - Piotr Bałczewski
- Group of Synthesis of Functional Materials, Department of Heteroorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland; Department of Structural and Material Research, Institute of Chemistry, Environmental Protection and Biotechnology, The Faculty of Mathematics and Natural Sciences, Jan Długosz University in Częstochowa, Armii Krajowej 13/15, 42-201 Częstochowa, Poland.
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21
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Pal S, Chowdhury S, Rozwadowski E, Auffrant A, Gosmini C. Cobalt-Catalyzed Reductive Cross-Coupling Between Benzyl Chlorides and Aryl Halides. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600378] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Suman Pal
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Sushobhan Chowdhury
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Elodie Rozwadowski
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Audrey Auffrant
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Corinne Gosmini
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
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22
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Affiliation(s)
- Marc Moselage
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstraße 2, 37077 Göttingen, Germany
| | - Jie Li
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstraße 2, 37077 Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstraße 2, 37077 Göttingen, Germany
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