1
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Schneider Y, Jadhav AP, Legault CY. Synthesis of Indoles Using the Electrophilic Potential of Diazirines. J Org Chem 2023; 88:14809-14819. [PMID: 37779242 DOI: 10.1021/acs.joc.3c01673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
The electrophilic potential of diazirines has been utilized to obtain N-substituted diaziridines that are directly hydrolyzed to produce monosubstituted hydrazines. The hydrazines can undergo the Fisher process with enolizable carbonyls to yield multiple indole derivatives in moderate to high yields. The N-metalated diaziridine intermediates can undergo isomerization prior to electrophilic substitution, to form N,N-disubstituted hydrazones. The latter react with enolizable carbonyls to produce N-protected indole derivatives in a single step. This protocol was used to efficiently synthesize indomethacin, an anti-inflammatory drug.
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Affiliation(s)
- Yoann Schneider
- University of Sherbrooke, Department of Chemistry, 2500 boul. de l'Université, Sherbrooke, Québec, J1K 2R1, Canada
| | - Amol P Jadhav
- University of Sherbrooke, Department of Chemistry, 2500 boul. de l'Université, Sherbrooke, Québec, J1K 2R1, Canada
| | - Claude Y Legault
- University of Sherbrooke, Department of Chemistry, 2500 boul. de l'Université, Sherbrooke, Québec, J1K 2R1, Canada
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2
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Jiao L, Zhang B, Qu B, Zhai R, Chen X. Rh(III)-Catalyzed Direct C-H Cyclization of N-Nitrosoanilines with 1,3-Dicarbonyl Compounds: A Route to Tetrahydrocarbazol-4-ones. J Org Chem 2023. [PMID: 37449739 DOI: 10.1021/acs.joc.3c00714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
A novel and efficient Rh(III)-catalyzed direct C-H bond tandem annulation of N-nitrosoanilines with 1,3-dicarbonyl compounds through two C-H bond cleavage was developed. This protocol provides a rapid access to a series of valuable tetrahydrocarbazol-4-ones with the feature of readily available starting materials, broad functional group tolerance, and in situ generation of carbene precursors. Importantly, some reaction products exhibited promising antiproliferative activity in cancer cell lines.
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Affiliation(s)
- Liulin Jiao
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Bo Zhang
- Affiliated Hospital of Jiujiang University, Jiujiang, Jiangxi 332000,China
| | - Bohong Qu
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Ruirui Zhai
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Xun Chen
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
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3
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Han L, Liu T, Wang H, Luan X. Palladium-Catalyzed Alkenyl C-H Activation/Diamination toward Tetrahydrocarbazole and Analogs Using Hydroxylamines as Single-Nitrogen Sources. Org Lett 2023; 25:58-63. [PMID: 36542630 DOI: 10.1021/acs.orglett.2c03809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A palladium-catalyzed alkenyl C-H activation/diamination reaction of cycloalkenyl bromoarenes with hydroxylamines is described. A wide range of tetrahydrocarbazoles and analogs has been prepared using fine-tuning bifunctional secondary hydroxylamines as the single-nitrogen sources. Mechanistic investigations suggest that the selective alkenyl C-H activation/diamination cascade process should build the N-heterocycles.
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Affiliation(s)
- Lingbo Han
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
| | - Tingjie Liu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
| | - Han Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
| | - Xinjun Luan
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
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4
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Mikhalyonok SG, Savelyev AI, Kuz’menok NM, Bezborodov VS. Chemo- and regioselective oxidation of substituted 2,3,4,9-tetrahydro-1H-carbazoles. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03106-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
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5
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Zeng MQ, Feng KX, Hu BL, Tu HY, Zhang XG. Ni-Catalyzed Reductive Arylalkenylation of Alkynes for the Selective Synthesis of Polysubstituted Naphthalenes. Org Lett 2022; 24:5386-5390. [PMID: 35856849 DOI: 10.1021/acs.orglett.2c02068] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A Ni-catalyzed reductive arylalkenylation of alkynes with 1-bromo-2-(2-chlorovinyl)arenes in the presence of zinc powder has been developed. This base-free cyclization provides a novel protocol for the selective synthesis of 2-trifluoromethyl naphthalenes and ethyl 2-naphthoates from simple starting materials in moderate to good yields with excellent tolerance of functional groups.
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Affiliation(s)
- Meng-Qiang Zeng
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Ke-Xin Feng
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Bo-Lun Hu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Hai-Yong Tu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xing-Guo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.,Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
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6
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Li H, Gu H, Lu Y, Xu N, Han N, Li J, Liu J, Liu J. Synthesis of Tetrahydrocarbazol-4-ones via Rh(III)-Catalyzed C-H Activation/Annulation of Arylhydrazines with Iodonium Ylides. J Org Chem 2022; 87:8142-8150. [PMID: 35675060 DOI: 10.1021/acs.joc.2c00852] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The rhodium(III)-catalyzed C-H activation followed by intramolecular annulation reactions between arylhydrazines and iodonium ylides under suitable conditions has been described. Tetrahydrocarbazol-4-ones are readily achieved with moderate to excellent yields. The synthetic protocol features a wide range of substrates with high functional group tolerance. The gram-scale reaction and derivatization of the product demonstrate the synthetic practicality and utilization of this method.
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Affiliation(s)
- He Li
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Haichun Gu
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Ye Lu
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China.,Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), Inner Mongolia Minzu University, Tongliao 028000, China
| | - Ning Xu
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Narenchaoketu Han
- College of Traditional Mongolian Medicine, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Jiaqi Li
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Jinghai Liu
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China.,Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), Inner Mongolia Minzu University, Tongliao 028000, China
| | - Jinglin Liu
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China.,Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, Inner Mongolia Minzu University, Tongliao 028000, China
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7
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Sardar B, Jamatia R, Samanta A, Srimani D. Ru Doped Hydrotalcite Catalyzed Borrowing Hydrogen-Mediated N-Alkylation of Benzamides, Sulfonamides, and Dehydrogenative Synthesis of Quinazolinones. J Org Chem 2022; 87:5556-5567. [PMID: 35442678 DOI: 10.1021/acs.joc.1c02913] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient Ru doped hydrotalcite catalyzed N-alkylation of benzamides and sulfonamides with alcohols via borrowing hydrogen catalysis is illustrated. Various primary alcohols, including benzyl, heteroaryl, and aliphatic alcohols, were alkylated in good to excellent yields. To shed light on the mechanistic details, several control studies and deuterium labeling experiments were performed. Mechanistic studies underpin that the reaction is going via a borrowing hydrogen pathway rather than an SN1 type mechanism. The reaction can be easily scaled up without any detrimental effect on the yield. The catalyst is also capable of synthesizing quinazolinone directly from 2-aminobenzamide and alcohols. Successful recyclability and high reactivity highlight the practical applicability of the catalyst.
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Affiliation(s)
- Bitan Sardar
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam, Guwahati Pin 781039, India
| | - Ramen Jamatia
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam, Guwahati Pin 781039, India.,Department of Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh, Arunachal Pradesh 791112, India
| | - Arup Samanta
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam, Guwahati Pin 781039, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam, Guwahati Pin 781039, India
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8
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Microwave-Assisted Synthesis of 2-Methyl-1H-indole-3-carboxylate Derivatives via Pd-Catalyzed Heterocyclization. Symmetry (Basel) 2022. [DOI: 10.3390/sym14030435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Indole moiety is well-known as a superlative framework in many natural products and synthetic pharmaceuticals. Herein, we report an efficient procedure to synthesize a series of functionalized 2-methyl-1H-indole-3-carboxylate derivatives from commercially available anilines properly functionalized by different electron-withdrawing and -donating groups through a palladium-catalyzed intramolecular oxidative coupling. The conversion of a variety of enamines into the relevant indole was optimized by exposing the neat mixture of reactants to microwave irradiation, obtaining the desired products in excellent yields and high regioselectivity. The synthesized compounds were confirmed by 1H and 13C spectroscopic means as well as by high-resolution mass spectrometry.
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9
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Deprotometalation-Iodolysis and Direct Iodination of 1-Arylated 7-Azaindoles: Reactivity Studies and Molecule Properties. Molecules 2021; 26:molecules26206314. [PMID: 34684895 PMCID: PMC8537530 DOI: 10.3390/molecules26206314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022] Open
Abstract
Five protocols were first compared for the copper-catalyzed C-N bond formation between 7-azaindole and aryl/heteroaryl iodides/bromides. The 1-arylated 7-azaindoles thus obtained were subjected to deprotometalation-iodolysis sequences using lithium 2,2,6,6-tetramethylpiperidide as the base and the corresponding zinc diamide as an in situ trap. The reactivity of the substrate was discussed in light of the calculated atomic charges and the pKa values. The behavior of the 1-arylated 7-azaindoles in direct iodination was then studied, and the results explained by considering the HOMO orbital coefficients and the atomic charges. Finally, some of the iodides generated, generally original, were involved in the N-arylation of indole. While crystallographic data were collected for fifteen of the synthesized compounds, biological properties (antimicrobial, antifungal and antioxidant activity) were evaluated for others.
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10
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Knowles JP, Steeds HG, Schwarz M, Latter F, Booker-Milburn KI. Pd-Catalyzed Cascade Reactions of Aziridines: One-Step Access to Complex Tetracyclic Amines. Org Lett 2021; 23:4986-4990. [PMID: 34132553 PMCID: PMC8289308 DOI: 10.1021/acs.orglett.1c01403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Indexed: 11/29/2022]
Abstract
The combination of palladium catalysis and thermal cycloaddition is shown to transform tricyclic aziridines into complex, stereodefined tetracyclic products in a single step. This highly unusual cascade process involves a diverted Tsuji-Trost sequence leading to a surprisingly facile intramolecular Diels-Alder reaction. The starting materials are accessible on multigram scales from the photochemical rearrangement of simple pyrroles. The tetracyclic amine products can be further elaborated through routine transformations, highlighting their potential as scaffolds for medicinal chemistry.
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Affiliation(s)
- Jonathan P. Knowles
- Department
of Applied Sciences, Northumbria University, Newcastle upon Tyne NE1
8ST, U.K.
| | - Hannah G. Steeds
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Maria Schwarz
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Francesca Latter
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
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11
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Hughes-Whiffing CA, Perry A. One-pot, three-component Fischer indolisation- N-alkylation for rapid synthesis of 1,2,3-trisubstituted indoles. Org Biomol Chem 2021; 19:627-634. [PMID: 33367375 DOI: 10.1039/d0ob02185g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A one-pot, three-component protocol for the synthesis of 1,2,3-trisubstituted indoles has been developed, based upon a Fischer indolisation-indole N-alkylation sequence. This procedure is very rapid (total reaction time under 30 minutes), operationally straightforward, generally high yielding and draws upon readily available building blocks (aryl hydrazines, ketones, alkyl halides) to generate densely substituted indole products. We have demonstrated the utility of this process in the synthesis of 23 indoles, benzoindoles and tetrahydrocarbazoles bearing varied and useful functionality.
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Affiliation(s)
| | - Alexis Perry
- Biosciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK.
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12
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Sajjad F, Reddy AGK, Xing D, Dong S, Hu W. Ruthenium(II)-catalyzed facile synthesis of 3-(phenylamino)-1H-indole-2-carboxylates from anilines and diazo pyruvates promoted by FeCl3. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Abstract
An approach toward the 6-7-5 tricyclic carbon skeleton of the hamigeran natural products was developed. The key steps include a benzyne-β-ketoester annulative ring expansion to form the 7-membered ring, a Nazarov reaction to form the 5-membered ring, a Ni-catalyzed conjugate methyl addition or a Corey-Chaykovsky reaction to install the all-carbon quaternary center, and a Suzuki cross coupling followed by reduction to introduce the isopropyl group.
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Affiliation(s)
- Baiyang Jiang
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Mingji Dai
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
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14
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Kaur N, Verma Y, Grewal P, Ahlawat N, Bhardwaj P, Jangid NK. Palladium acetate assisted synthesis of five-membered N-polyheterocycles. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1723640] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Jaipur, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Jaipur, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Jaipur, India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Jaipur, India
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15
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Chesnokov GA, Ageshina AA, Topchiy MA, Nechaev MS, Asachenko AF. Transition-Metal-Free Synthesis of 1,2-Disubstituted Indoles. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900772] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Gleb A. Chesnokov
- A.V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; 119991 Moscow Leninskiy prospect 29 Russia
- Department of Chemistry; M.V. Lomonosov Moscow State University; 119991 Moscow Leninskiy Gory 1 (3) Russia
| | - Alexandra A. Ageshina
- A.V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; 119991 Moscow Leninskiy prospect 29 Russia
| | - Maxim A. Topchiy
- A.V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; 119991 Moscow Leninskiy prospect 29 Russia
- Department of Chemistry; M.V. Lomonosov Moscow State University; 119991 Moscow Leninskiy Gory 1 (3) Russia
| | - Mikhail S. Nechaev
- A.V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; 119991 Moscow Leninskiy prospect 29 Russia
- Department of Chemistry; M.V. Lomonosov Moscow State University; 119991 Moscow Leninskiy Gory 1 (3) Russia
| | - Andrey F. Asachenko
- A.V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; 119991 Moscow Leninskiy prospect 29 Russia
- Department of Chemistry; M.V. Lomonosov Moscow State University; 119991 Moscow Leninskiy Gory 1 (3) Russia
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16
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Mphahlele MJ. Crystal structure of 1-(5-bromo-2-(4-methoxyphenyl)-1 H-indol-7-yl)ethan-1-ol, C 17H 14BrNO 2. Z KRIST-NEW CRYST ST 2019. [DOI: 10.1515/ncrs-2018-0363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C17H14BrNO2, monoclinic, C2/c (no. 15), a = 31.437(3) Å, b = 5.5224(5) Å, c = 16.6545(16) Å, β = 94.703(4)°, V = 2881.6(5) Å3, Z = 8, R
gt(F) = 0.0251, wR
ref(F
2) = 0.067, T = 173(2) K.
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Affiliation(s)
- Malose J. Mphahlele
- Department of Chemistry, College of Science Engineering and Technology, University of South Africa , P.O. Box 392 Pretoria 0003 , South Africa
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17
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Li J, Zhou J, Chen Y, Huang J. Divergent Synthesis of Indole-2-carboxylic Acid Derivatives via Ligand-free Copper-catalyzed Ullmann Coupling Reaction. HETEROCYCLES 2019. [DOI: 10.3987/com-19-14092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Kaur N. Applications of palladium dibenzylideneacetone as catalyst in the synthesis of five-membered N-heterocycles. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2018.1540048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, Rajasthan, India
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19
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Affiliation(s)
- So Won Youn
- Center for New Directions in Organic Synthesis, Department of Chemistry and Institute for Natural Sciences; Hanyang University; Seoul 04763 Korea
| | - Tae Yun Ko
- Center for New Directions in Organic Synthesis, Department of Chemistry and Institute for Natural Sciences; Hanyang University; Seoul 04763 Korea
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20
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Wang CH, Yang SD. Rh(III)-Catalyzed Phosphine Oxide Migration Reactions: Selective Synthesis of 3-Phosphinoylindoles. Chem Asian J 2018; 13:2401-2404. [DOI: 10.1002/asia.201800516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/06/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Chun-Hai Wang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 P. R. China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Lanzhou 730000 P. R. China
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21
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Das J, Banerjee D. Nickel-Catalyzed Phosphine Free Direct N-Alkylation of Amides with Alcohols. J Org Chem 2018; 83:3378-3384. [PMID: 29441778 DOI: 10.1021/acs.joc.7b03215] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Herein, we developed an operational simple, practical, and selective Ni-catalyzed synthesis of secondary amides. Application of renewable alcohols, earth-abundant and nonprecious nickel catalyst facilitates the transformations, releasing water as byproduct. The catalytic system is tolerant to a variety of functional groups including nitrile, allylic ether, and alkene and could be extended to the synthesis of bis-amide, antiemetic drug Tigan, and dopamine D2 receptor antagonist Itopride. Preliminary mechanistic studies revealed the participation of a benzylic C-H bond in the rate-determining step.
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Affiliation(s)
- Jagadish Das
- Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee - 247667 , Uttarakhand , India
| | - Debasis Banerjee
- Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee - 247667 , Uttarakhand , India
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22
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Zuo Y, He X, Ning Y, Wu Y, Shang Y. Rh(III)-Catalyzed C-H Activation/Intramolecular Cyclization: Access to N-Acyl-2,3-dihydro-1 H-carbazol-4(9 H)-ones from Cyclic 2-Diazo-1,3-diketones and N-Arylamides. ACS OMEGA 2017; 2:8507-8516. [PMID: 31457387 PMCID: PMC6645244 DOI: 10.1021/acsomega.7b01637] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 11/17/2017] [Indexed: 06/10/2023]
Abstract
A Rh(III)-catalyzed C-H activation/cyclization cascade reaction is described. The reaction involves cyclic 2-diazo-1,3-diketones and N-arylamides, and it proceeds via an intermolecular C-C bond formation and subsequent intramolecular C-N bond formation. A variety of N-acyl-2,3-dihydro-1H-carbazol-4(9H)-ones were obtained under mild conditions in good to excellent yields (65-90%). Key features of this strategy include high-efficiency, operational simplicity, scalability, and broad functional-group tolerance. In addition, H2O and N2 are the only byproducts. Carbazole derivatives with free NH groups can be easily obtained through N-deprotection reactions.
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Affiliation(s)
- Youpeng Zuo
- Key Laboratory of Functional Molecular
Solids, Ministry of Education, Anhui Laboratory of Molecule-Based
Materials (State Key Laboratory Cultivation Base), College of Chemistry
and Materials Science, Anhui Normal University, Wuhu 241000, P.R. China
| | - Xinwei He
- Key Laboratory of Functional Molecular
Solids, Ministry of Education, Anhui Laboratory of Molecule-Based
Materials (State Key Laboratory Cultivation Base), College of Chemistry
and Materials Science, Anhui Normal University, Wuhu 241000, P.R. China
| | - Yi Ning
- Key Laboratory of Functional Molecular
Solids, Ministry of Education, Anhui Laboratory of Molecule-Based
Materials (State Key Laboratory Cultivation Base), College of Chemistry
and Materials Science, Anhui Normal University, Wuhu 241000, P.R. China
| | - Yuhao Wu
- Key Laboratory of Functional Molecular
Solids, Ministry of Education, Anhui Laboratory of Molecule-Based
Materials (State Key Laboratory Cultivation Base), College of Chemistry
and Materials Science, Anhui Normal University, Wuhu 241000, P.R. China
| | - Yongjia Shang
- Key Laboratory of Functional Molecular
Solids, Ministry of Education, Anhui Laboratory of Molecule-Based
Materials (State Key Laboratory Cultivation Base), College of Chemistry
and Materials Science, Anhui Normal University, Wuhu 241000, P.R. China
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23
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Takeda Y, Kajihara R, Kobayashi N, Noguchi K, Saito A. Molecular-Iodine-Catalyzed Cyclization of 2-Alkynylanilines via Iodocyclization–Protodeiodination Sequence. Org Lett 2017; 19:6744-6747. [DOI: 10.1021/acs.orglett.7b03497] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuichiro Takeda
- Division
of Applied Chemistry, Institute of Engineering, and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Ryota Kajihara
- Division
of Applied Chemistry, Institute of Engineering, and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Naoko Kobayashi
- Division
of Applied Chemistry, Institute of Engineering, and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Keiichi Noguchi
- Division
of Applied Chemistry, Institute of Engineering, and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Akio Saito
- Division
of Applied Chemistry, Institute of Engineering, and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
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24
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Xu D, Zhao Y, Song D, Zhong Z, Feng S, Xie X, Wang X, She X. (3 + 2)-Annulation of p-Quinamine and Aryne: A Strategy To Construct the Multisubstituted Hydrocarbazoles. Org Lett 2017; 19:3600-3603. [DOI: 10.1021/acs.orglett.7b01578] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Dengyu Xu
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yulong Zhao
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Dengpeng Song
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Zhuliang Zhong
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Shangbiao Feng
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xingang Xie
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaolei Wang
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xuegong She
- State
Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
- Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, People’s Republic of China
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25
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Abstract
A catalyst system derived from commercially available Pd2(dba)3 and PtBu3 has been applied to the coupling of α-keto ester enolates and aryl bromides. The reaction provides access to an array of β-stereogenic α-keto esters. When the air-stable ligand precursor PtBu3·HBF4 is employed, the reaction can be carried out without use of a glovebox. The derived products are of broad interest given the prevalence of the α-keto acid substructure in biologically important molecules.
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Affiliation(s)
- Blane P Zavesky
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Samuel L Bartlett
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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26
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Maezono SMB, Poudel TN, Lee YR. One-pot construction of sterically challenging and diverse polyarylphenols via transition-metal-free benzannulation and their potent in vitro antioxidant activity. Org Biomol Chem 2017; 15:2052-2062. [DOI: 10.1039/c7ob00078b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
One pot novel synthesis of highly functionalized polyarylphenols via benzannulation under transition-metal-free conditions and their antioxidant activities are described.
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Affiliation(s)
| | - Tej Narayan Poudel
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
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27
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Stempel E, Gaich T. Cyclohepta[b]indoles: A Privileged Structure Motif in Natural Products and Drug Design. Acc Chem Res 2016; 49:2390-2402. [PMID: 27709885 DOI: 10.1021/acs.accounts.6b00265] [Citation(s) in RCA: 222] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Seven-membered rings fused with an indole are termed cyclohepta[b]indoles. Compounds exhibiting this structure motif display a broad spectrum of biological activities, ranging from inhibition of adipocyte fatty-acid-binding protein (A-FABP), deacetylation of histones, inhibition of leukotriene production p53, antituberculosis activities, and anti-HIV activities. These biological profiles are found in natural products containing the cyclohepta[b]indole motif, as well as in pharmaceuticals that contain this structure motif. Therefore, the biology of molecules derived from the skeleton of cyclohepta[b]indoles, as well as cyclopenta- and cyclohexa[b]indoles, has attracted considerable interest from the pharmaceutical industry as potential therapeutics in recent years. This is reflected by more than two dozen patents that have been issued in the past decade, solely based on the cyclohepta[b]indole structure motif. The efficient preparation of highly functionalized and unsymmetrically substituted cyclohepta[b]indoles has therefore become of central interest for synthetic organic chemists. Historically, this structure motif most often has been prepared by means of a Fischer indole synthesis. Although very robust and useful, this reaction poses certain limitations. Especially unsymmetrically functionalized cyclohepta[b]indoles are not suitable for a Fischer indole type synthesis, since product mixtures are inevitable. Therefore, novel methodologies to overcome these synthetic obstacles have been developed in recent years. This Account introduces all natural products and pharmaceutical compounds exhibiting the cyclohepta[b]indole motif. The structural variability within cyclohepta[b]indole alkaloids in combination with the broad range of organisms where these alkaloids have been isolated from, strongly suggests that the cyclohepta[b]indole is somehow a "privileged" structure motif. The organisms producing these compounds range from evergreen trees (actinophyllic acid) to cyanobacteria (ambiguinines). The synthetic methodologies to construct these molecular scaffolds (natural and unnatural in origin) are in turn highlighted and discussed with regard to their potential to access highly functionalized and unsymmetrical cyclohepta[b]indoles, for which they specifically have been designed. The methods are classified with respect to reaction type and whether or not they are enantioselective. Finally, the syntheses of cyclohepta[b]indole natural products are presented, thereby in each case, focusing on the construction of this structure motif in the course of the respective total synthesis. As a conclusion, we end by contrasting the methodological progress in the field with the actual successful application of the newly developed methods to the synthesis of complex structures to pinpoint the urgent requirement for further synthetic development for efficient synthetic design of this "privileged" structure motif.
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Affiliation(s)
- Erik Stempel
- Institut
für Organische Chemie, Leibniz Universität Hannover, 30167 Hannover, Germany
| | - Tanja Gaich
- Lehrstuhl
für Organische Chemie, Universität Konstanz, 78457 Konstanz, Germany
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28
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Du Y, Liu Y. Copper-Catalysed Selective 3-Sulfonylation of Indoles: A Mild Synthesis of Indolyl Sulfones. JOURNAL OF CHEMICAL RESEARCH 2016. [DOI: 10.3184/174751916x14733526548948] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The selective C3-sulfonylation of some 4-, 5- and 6-substituted indoles using sodium arenesulfinates as reaction partners has been realised under mild conditions using catalytic CuI/1,10-phenanthroline at 70 °C. The reaction had a satisfactory application scope and proceeded in fair to excellent yields.
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Affiliation(s)
- Yi Du
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
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29
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Abstract
![]()
Pd-catalyzed
cross-coupling reactions that form C–N bonds
have become useful methods to synthesize anilines and aniline derivatives,
an important class of compounds throughout chemical research. A key
factor in the widespread adoption of these methods has been the continued
development of reliable and versatile catalysts that function under
operationally simple, user-friendly conditions. This review provides
an overview of Pd-catalyzed N-arylation reactions found in both basic
and applied chemical research from 2008 to the present. Selected examples
of C–N cross-coupling reactions between nine classes of nitrogen-based
coupling partners and (pseudo)aryl halides are described for the synthesis
of heterocycles, medicinally relevant compounds, natural products,
organic materials, and catalysts.
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Affiliation(s)
- Paula Ruiz-Castillo
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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30
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Efficient Synthesis of Indole Derivatives via Tandem Cyclization Catalyzed by Magnetically Recoverable Palladium/Magnetite (Pd‐Fe
3
O
4
) Nanocrystals. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201500536] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Pham NN, Dang TT, Ngo NT, Villinger A, Ehlers P, Langer P. Facile synthesis of 4- and 7-azaindoles from the corresponding imines by palladium-catalyzed cascade C-C and C-N coupling. Org Biomol Chem 2016; 13:6047-58. [PMID: 25947884 DOI: 10.1039/c5ob00720h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The cyclization of 2,3-dihalopyridines with readily available imines provides a convenient and regioselective approach to 4- and 7-azaindoles. The regioselectivity can be controlled by the choice of the halogen atoms at the pyridine ring (chlorine versus bromine).
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Affiliation(s)
- Ngo Nghia Pham
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany.
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32
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Xu Y, Su T, Huang Z, Dong G. Practical Direct α-Arylation of Cyclopentanones by Palladium/Enamine Cooperative Catalysis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510638] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yan Xu
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Tianshun Su
- Department of Chemistry; University of Science and Technology of China (USTC); Hefei Anhui 230026 China
| | - Zhongxing Huang
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Guangbin Dong
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
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33
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Xu Y, Su T, Huang Z, Dong G. Practical Direct α-Arylation of Cyclopentanones by Palladium/Enamine Cooperative Catalysis. Angew Chem Int Ed Engl 2016; 55:2559-63. [DOI: 10.1002/anie.201510638] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Indexed: 01/20/2023]
Affiliation(s)
- Yan Xu
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Tianshun Su
- Department of Chemistry; University of Science and Technology of China (USTC); Hefei Anhui 230026 China
| | - Zhongxing Huang
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Guangbin Dong
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
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34
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Liu J, Wang L, Wang X, Xu L, Hao Z, Xiao J. Fluorinated alcohol-mediated [4 + 3] cycloaddition reaction of indolyl alcohols with cyclopentadiene. Org Biomol Chem 2016; 14:11510-11517. [DOI: 10.1039/c6ob01953f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes a catalyst- and additive-free, [4 + 3] cycloaddition reaction of 3-indolylmethanols with cyclopentadiene in HFIP, producing cyclohepta[b]indole derivatives in high yields and with wide substrate scope.
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Affiliation(s)
- Jian Liu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Xiaoxiao Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Zhihui Hao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
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35
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Zhang SL, Yu ZL. C–C Activation by Retro-Aldol Reaction of Two β-Hydroxy Carbonyl Compounds: Synergy with Pd-Catalyzed Cross-Coupling To Access Mono-α-arylated Ketones and Esters. J Org Chem 2015; 81:57-65. [DOI: 10.1021/acs.joc.5b02098] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Song-Lin Zhang
- The Key
Laboratory of Food
Colloids and Biotechnology, Ministry of Education, School of Chemical
and Material Engineering, Jiangnan University, Lihu Road 1800, Wuxi, Jiangsu 214122, China
| | - Ze-Long Yu
- The Key
Laboratory of Food
Colloids and Biotechnology, Ministry of Education, School of Chemical
and Material Engineering, Jiangnan University, Lihu Road 1800, Wuxi, Jiangsu 214122, China
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36
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Kerdphon S, Quan X, Parihar VS, Andersson PG. C–N Coupling of Amides with Alcohols Catalyzed by N-Heterocyclic Carbene–Phosphine Iridium Complexes. J Org Chem 2015; 80:11529-37. [DOI: 10.1021/acs.joc.5b01324] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sutthichat Kerdphon
- Department
of Organic Chemistry, Stockholm University, S-10691, Stockholm, Sweden
| | - Xu Quan
- Department
of Organic Chemistry, Stockholm University, S-10691, Stockholm, Sweden
| | | | - Pher G. Andersson
- Department
of Organic Chemistry, Stockholm University, S-10691, Stockholm, Sweden
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37
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Hoque MM, Halim MA, Sarwar MG, Khan MW. Palladium-catalyzed cyclization of 2-alkynyl-N
-ethanoyl anilines to indoles: synthesis, structural, spectroscopic, and mechanistic study. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3477] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohammad Mazharol Hoque
- Department of Chemistry; Bangladesh University of Engineering and Technology; Dhaka 1000 Bangladesh
- Bangladesh Institute of Computational Chemistry and Biochemistry; 38 Green Road West Dhaka 1205 Bangladesh
| | - Mohammad A. Halim
- Bangladesh Institute of Computational Chemistry and Biochemistry; 38 Green Road West Dhaka 1205 Bangladesh
| | - Mohammed G. Sarwar
- Department of Chemistry; The Scripps Research Institute; La Jolla CA 92037 USA
| | - Md. Wahab Khan
- Department of Chemistry; Bangladesh University of Engineering and Technology; Dhaka 1000 Bangladesh
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38
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Huang Y, Chen T, Li Q, Zhou Y, Yin SF. Copper catalysed direct amidation of methyl groups with N-H bonds. Org Biomol Chem 2015; 13:7289-93. [PMID: 26054841 DOI: 10.1039/c5ob00685f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An efficient copper catalyzed direct aerobic oxidative amidation of methyl groups of azaarylmethanes with N-H bonds producing amides is successfully developed, which can produce primary, secondary and tertiary amides, including those with functional groups. This reaction represents a straightforward method for the preparation of amides from the readily available hydrocarbon starting materials.
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Affiliation(s)
- Yao Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
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39
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Li B, Guo S, Zhang J, Zhang X, Fan X. Selective Access to 3-Cyano-1H-indoles, 9H-Pyrimido[4,5-b]indoles, or 9H-Pyrido[2,3-b]indoles through Copper-Catalyzed One-Pot Multicomponent Cascade Reactions. J Org Chem 2015; 80:5444-56. [DOI: 10.1021/acs.joc.5b00239] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Bin Li
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Shenghai Guo
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Ju Zhang
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xinying Zhang
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xuesen Fan
- School of Environment, School
of Chemistry and Chemical Engineering, Collaborative Innovation Center
of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory
of Green Chemical Media and Reactions, Ministry of Education, and
Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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40
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Huang B, Hu D, Wang J, Wan JP, Liu Y. Copper-catalyzed one-pot tandem reactions toward the synthesis of indoles using o-iodoanilines, acyl chlorides, and Wittig reagents. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.134] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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41
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Rull SG, Blandez JF, Fructos MR, Belderrain TR, Nicasio MC. CN Coupling of Indoles and Carbazoles with Aromatic Chlorides Catalyzed by a Single-Component NHC-Nickel(0) Precursor. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500030] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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42
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Tang XY, Zhang YS, He L, Wei Y, Shi M. Intramolecular annulation of aromatic rings with N-sulfonyl 1,2,3-triazoles: divergent synthesis of 3-methylene-2,3-dihydrobenzofurans and 3-methylene-2,3-dihydroindoles. Chem Commun (Camb) 2015; 51:133-6. [DOI: 10.1039/c4cc08343a] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The controllable synthesis of 3-methylene-2,3-dihydrobenzofurans 2 and 3-methylene-2,3-dihydroindoles 5 has been developed via cycloisomerization of N/O-tethered aryltriazoles.
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Affiliation(s)
- Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Yong-Sheng Zhang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Lv He
- Department of Chemistry
- Shanghai University
- Shanghai 200436
- China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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43
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Molla RA, Iqubal MA, Ghosh K, Kamaluddin K, Islam SM. Nitrogen enriched mesoporous organic polymer anchored copper(ii) material: an efficient and reusable catalyst for the synthesis of esters and amides from aromatic systems. Dalton Trans 2015; 44:6546-59. [DOI: 10.1039/c4dt03838j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New mesoporous polymer anchored copper acetate (Cu-mPMF) has been synthesized and well characterized. The catalytic performance of this complex has been tested for the synthesis of esters and amides.
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Affiliation(s)
| | | | - Kajari Ghosh
- Department of Chemistry
- University of Kalyani
- Kalyani
- India
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44
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Dao-Huy T, Haider M, Glatz F, Schnürch M, Mihovilovic MD. Direct Arylation of Benzo[ b]furan and Other Benzo-Fused Heterocycles. European J Org Chem 2014; 2014:8119-8125. [PMID: 26213483 PMCID: PMC4502765 DOI: 10.1002/ejoc.201403125] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Indexed: 01/01/2023]
Abstract
The direct arylation of benzo[b]furan, benzo[b]thiophene, and indole has been studied by using aromatic bromides as the aryl source. The protocol employing common reagents and a Pd catalyst has led to the regioselective arylation of these heterocycles at the 2-position. A range of functional groups were tolerated, providing quick access to a variety of arylated benzo-fused heterocycles that would be accessible more elaborately using classical synthetic strategies. This is the first systematic study of the direct arylation of benzo[b]furan.
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Affiliation(s)
- Toan Dao-Huy
- Institute of Applied Synthetic Chemistry, Vienna University of Technology Getreidemarkt 9/163-OC, 1060 Vienna, Austria E-mail: http://www.ias.tuwien.ac.at/staff/3129565/
| | - Maximilian Haider
- Institute of Applied Synthetic Chemistry, Vienna University of Technology Getreidemarkt 9/163-OC, 1060 Vienna, Austria E-mail: http://www.ias.tuwien.ac.at/staff/3129565/
| | - Fabian Glatz
- Institute of Applied Synthetic Chemistry, Vienna University of Technology Getreidemarkt 9/163-OC, 1060 Vienna, Austria E-mail: http://www.ias.tuwien.ac.at/staff/3129565/
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, Vienna University of Technology Getreidemarkt 9/163-OC, 1060 Vienna, Austria E-mail: http://www.ias.tuwien.ac.at/staff/3129565/
| | - Marko D Mihovilovic
- Institute of Applied Synthetic Chemistry, Vienna University of Technology Getreidemarkt 9/163-OC, 1060 Vienna, Austria E-mail: http://www.ias.tuwien.ac.at/staff/3129565/
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45
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Kaur N. Palladium Catalysts: Synthesis of Five-MemberedN-Heterocycles Fused with Other Heterocycles. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2014. [DOI: 10.1080/01614940.2014.976118] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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46
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Bao X, Yao W, Zhu Q, Xu Y. Synthesis of 6-Substituted Phenanthridine Derivatives by Palladium-Catalysed Domino Suzuki-Miyaura/Aza-Michael Reactions. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402913] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Abstract
Concise and highly stereocontrolled total syntheses of racemic and enantiopure frog alkaloid 205B (1) were accomplished in 11 steps from 4-methoxypyridines 6 and 7 in overall yields of 8 and 8%, respectively. The assembly of the core of the natural product relies on a stereoselective Tsuji-Trost allylic amination reaction and a ring-closing metathesis. The synthesis features the use of an N-acylpyridinium salt reaction to introduce the first stereocenter and an unprecedented trifluoroacetic anhydride-mediated addition of an allylstannane to a vinylogous amide with complete facial selectivity. Deoxygenation of the C4 ketone proved difficult but was accomplished via a modified Barton-McCombie reaction in the presence of a catalytic amount of diphenyl diselenide.
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Affiliation(s)
| | - Daniel L. Comins
- Department of Chemistry, North
Carolina State University, Raleigh, North Carolina 27695-8204, United States
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48
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Vijay Kumar S, Saraiah B, Parameshwarappa G, Ila H, Verma GK. Synthesis of N-Functionalized/NH-Multisubstituted Indoles, Thienopyrroles, Pyrroloindoles, and Pyrazolopyrroles via Sequential One-Pot Base-Mediated and Copper-Catalyzed Inter- and Intramolecular Amination of 2-[2-Bromo(het)aryl]-3-(het)aryl-3-(methylthio)acrylonitriles. J Org Chem 2014; 79:7961-78. [DOI: 10.1021/jo501114a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- S. Vijay Kumar
- New
Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - B. Saraiah
- New
Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - G. Parameshwarappa
- New
Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - H. Ila
- New
Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Girijesh K. Verma
- Department
of Chemistry, Banaras Hindu University, Varanasi 221005, India
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49
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He S, Hsung RP, Presser W, Ma ZX, Haugen BJ. An approach to cyclohepta[b]indoles through an allenamide (4 + 3) cycloaddition-Grignard cyclization-Chugaev elimination sequence. Org Lett 2014; 16:2180-3. [PMID: 24701990 PMCID: PMC3998770 DOI: 10.1021/ol5006455] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Indexed: 11/30/2022]
Abstract
A strategy for synthesizing highly functionalized cyclohepta[b]indoles through a concise (4 + 3) cycloaddition-cyclization-elimination sequence is described. The cycloaddition features nitrogen-stabilized oxyallyl cations derived from epoxidations of N-aryl-N-sulfonyl-substituted allenamides, while the cyclization and elimination employed an intramolecular Grignard addition and a one-step Chugaev process, respectively.
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Affiliation(s)
- Shuzhong He
- Division
of Pharmaceutical
Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Richard P. Hsung
- Division
of Pharmaceutical
Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - William
R. Presser
- Division
of Pharmaceutical
Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Zhi-Xiong Ma
- Division
of Pharmaceutical
Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
| | - Bryan J. Haugen
- Division
of Pharmaceutical
Sciences, School of Pharmacy, and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, United States
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50
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Xia G, Han X, Lu X. Pd(II)-Catalyzed One-Step Construction of Cycloalkane-Fused Indoles and Its Application in Formal Synthesis of (±)-Aspidospermidine. Org Lett 2014; 16:2058-61. [DOI: 10.1021/ol500662f] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Guoqin Xia
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Xiuling Han
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Xiyan Lu
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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