51
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Li Y, Xu X, Shi H, Pan L, Liu Q. Bicyclization of Isocyanides with Alkenoyl Bis(ketene dithioacetals): Access to 6,7-Dihydro-1H-indol-4(5H)-ones. J Org Chem 2014; 79:5929-33. [DOI: 10.1021/jo500928c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yifei Li
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xianxiu Xu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Hui Shi
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Ling Pan
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
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52
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Reddy BVS, Swain M, Reddy SM, Yadav JS, Sridhar B. Gold-Catalyzed 5-endo-digCyclization of 2-[(2-Aminophenyl)ethynyl]phenylamine with Ketones for the Synthesis of Spiroindolone and Indolo[3,2-c]quinolone Scaffolds. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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53
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Kim CE, Park S, Eom D, Seo B, Lee PH. Synthesis of pyrroles from terminal alkynes, N-sulfonyl azides, and alkenyl alkyl ethers through 1-sulfonyl-1,2,3-triazoles. Org Lett 2014; 16:1900-3. [PMID: 24660875 DOI: 10.1021/ol500718s] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A method for synthesis of substituted pyrroles has been developed. 1-Sulfonyl-1,2,3-triazoles generated from terminal alkynes gave α-imino rhodium carbene complexes, which when reacted with alkenyl alkyl ethers afforded substituted pyrroles. The method can be efficiently applied to a one-pot sequential reaction starting from terminal alkynes.
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Affiliation(s)
- Cheol-Eui Kim
- Department of Chemistry, Kangwon National University , Chuncheon 200-701, Republic of Korea
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54
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Dawande SG, Kanchupalli V, Kalepu J, Chennamsetti H, Lad BS, Katukojvala S. Rhodium Enalcarbenoids: Direct Synthesis of Indoles by Rhodium(II)-Catalyzed [4+2] Benzannulation of Pyrroles. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400161] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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55
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Dawande SG, Kanchupalli V, Kalepu J, Chennamsetti H, Lad BS, Katukojvala S. Rhodium enalcarbenoids: direct synthesis of indoles by rhodium(II)-catalyzed [4+2] benzannulation of pyrroles. Angew Chem Int Ed Engl 2014; 53:4076-80. [PMID: 24590818 DOI: 10.1002/anie.201400161] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Indexed: 11/11/2022]
Abstract
Disclosed herein is the design of an unprecedented electrophilic rhodium enalcarbenoid which results from rhodium(II)-catalyzed decomposition of a new class of enaldiazo compounds. The synthetic utility of these enalcarbenoids has been successfully demonstrated in the first transition-metal-catalyzed [4+2] benzannulation of pyrroles, thus leading to substituted indoles. The new benzannulation has been applied to the efficient synthesis of the natural product leiocarpone as well as a potent adipocyte fatty-acid binding protein inhibitor.
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Affiliation(s)
- Sudam Ganpat Dawande
- Department of Chemistry, Indian Institute of Science Education & Research, Bhopal, Madhya Pradesh 462066 (India) http://home.iiserbhopal.ac.in/∼sk/
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56
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Li BL, Zhang M, Hu HC, Du X, Zhang ZH. Nano-CoFe2O4 supported molybdenum as an efficient and magnetically recoverable catalyst for a one-pot, four-component synthesis of functionalized pyrroles. NEW J CHEM 2014. [DOI: 10.1039/c3nj01368e] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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57
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Goriya Y, Ramana CV. 2-Aroylindoles from o-bromochalcones via Cu(i)-catalyzed SNAr with an azide and intramolecular nitrene C–H insertion. Chem Commun (Camb) 2014; 50:7790-2. [DOI: 10.1039/c4cc02501f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple procedure for the synthesis of 2-aroylindole derivatives comprising a one-pot CuI-catalyzed SNAr reaction ofo-bromochalcones with sodium azide and subsequent intramolecular cyclization through nitrene C–H insertion has been developed.
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Affiliation(s)
- Yogesh Goriya
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune-411008, India
| | - Chepuri V. Ramana
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune-411008, India
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58
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Yang W, Zhou Y, Sun H, Zhang L, Zhao F, Liu H. One-pot metal-free synthesis of highly substituted pyrroles from 2-acetyl-3-methylene-1,4-dicarbonyl compounds and primary amines via TBHP and activated carbon oxidative aromatization of dihydropyrrole. RSC Adv 2014. [DOI: 10.1039/c3ra47782g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A metal-free cascade process for the synthesis of highly substituted pyrroles with high yields and broad substrate tolerance via enamine, aza-Michael addition and TBHP, activated carbon oxidative aromatization is reported.
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Affiliation(s)
- Wei Yang
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Yu Zhou
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Haifeng Sun
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Lei Zhang
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Fei Zhao
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
| | - Hong Liu
- CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203, P. R. China
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59
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Cui HL, Tanaka F. One-pot synthesis of polysubstituted 3-acylpyrroles by cooperative catalysis. Org Biomol Chem 2014; 12:5822-6. [DOI: 10.1039/c4ob01019a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polysubstituted 3-acylpyrroles were synthesized from readily available unsaturated ketones and N-substituted propargylated amines via an aza-Michael/alkyne carbocyclization cascade followed by oxidation in one pot.
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Affiliation(s)
- Hai-Lei Cui
- Chemistry and Chemical Bioengineering Unit
- Okinawa Institute of Science and Technology Graduate University
- Onna, Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit
- Okinawa Institute of Science and Technology Graduate University
- Onna, Japan
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60
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Liu G, Xu G, Li J, Ding D, Sun J. Copper-catalyzed annulation of α-substituted diazoacetates with 2-ethynylanilines: the direct synthesis of C2-functionalized indoles. Org Biomol Chem 2014; 12:1387-90. [DOI: 10.1039/c3ob42350f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Copper-catalyzed direct annulation of α-substituted diazoacetates with 2-ethynylanilines leading to C2-functionalized indoles was achieved under mild reaction conditions. The C2-(carboxylate methyl) substituted indoles were obtained in moderate to high yields.
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Affiliation(s)
- Gang Liu
- School of Pharmaceutical Engineering & Life Science
- Changzhou University
- Changzhou 213164, P. R. China
| | - Guangyang Xu
- School of Pharmaceutical Engineering & Life Science
- Changzhou University
- Changzhou 213164, P. R. China
| | - Jian Li
- School of Pharmaceutical Engineering & Life Science
- Changzhou University
- Changzhou 213164, P. R. China
| | - Dong Ding
- School of Pharmaceutical Engineering & Life Science
- Changzhou University
- Changzhou 213164, P. R. China
| | - Jiangtao Sun
- School of Pharmaceutical Engineering & Life Science
- Changzhou University
- Changzhou 213164, P. R. China
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61
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Reddy BVS, Babu RA, Ramana Reddy M, Reddy BJM, Sridhar B. Intramolecular C–O/C–S bond insertion of α-diazoesters for the synthesis of 2-aryl-4H-benzo[d][1,3]oxazine and 2-aryl-4H-benzo[d][1,3]thiazine derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra08208g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An intramolecular C–O/C–S insertion of 2-(2-arylamidophenyl)-2-diazoacetate/2-diazo-2-(2-arylthioamidophenyl)acetate is achieved using 10 mol% Cu(OTf)2 to generate benzoxazines/benzothiazines.
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Affiliation(s)
- B. V. Subba Reddy
- Natural Product Chemistry
- Indian Institute of Chemical Technology
- Hyderabad, India
| | - R. Anji Babu
- Natural Product Chemistry
- Indian Institute of Chemical Technology
- Hyderabad, India
- Department of Organic Chemistry
- Adikavi Nannaya University
| | - M. Ramana Reddy
- Natural Product Chemistry
- Indian Institute of Chemical Technology
- Hyderabad, India
| | | | - B. Sridhar
- Laboratory of X-ray Crystallography
- Indian Institute of Chemical Technology
- Hyderabad, India
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62
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Miura T, Hiraga K, Biyajima T, Nakamuro T, Murakami M. Regiocontrolled synthesis of polysubstituted pyrroles starting from terminal alkynes, sulfonyl azides, and allenes. Org Lett 2013; 15:3298-301. [PMID: 23777199 DOI: 10.1021/ol401340u] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
1-Sulfonyl-1,2,3-triazoles, readily prepared from terminal alkynes and sulfonyl azides, react with allenes in the presence of a nickel(0) catalyst to produce the corresponding isopyrroles. The initially produced isopyrroles are further converted to a wide range of polysubstituted pyrroles through double bond transposition and Alder-ene reactions.
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Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan.
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63
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Gao WC, Jiang S, Wang RL, Zhang C. Iodine-mediated intramolecular amination of ketones: the synthesis of 2-acylindoles and 2-acylindolines by tuning N-protecting groups. Chem Commun (Camb) 2013; 49:4890-2. [DOI: 10.1039/c3cc40797g] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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64
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Sakurai T, Ishida Y, Yoshida Y, Igarashi T. Novel Photosensitized Cyclization Reactions of Ethyl 3-Amino-3-phenyl-2-propenoate Derivatives to Highly Substituted Pyrroles. HETEROCYCLES 2013. [DOI: 10.3987/com-13-12755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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