1
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Zhuang D, Jiang S, Wang Y, Wang X, Shen S, Yan R. I 2-Mediated [6 + 1] Annulation of Alkynes with MsONH 3OTf: Direct Synthesis of Benzo[ b]azepines. Org Lett 2023; 25:3007-3012. [PMID: 37083284 DOI: 10.1021/acs.orglett.3c00790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
The synthesis of benzo[b]azepines using protonated aminating reagent (MsONH3OTf) and alkynes through I2-mediated [6 + 1] annulation reaction has been developed. This protocol features excellent functional group tolerance and mild reaction conditions and affords the benzo[b]azepines in moderate to good yields under metal-free reaction conditions.
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Affiliation(s)
- Daijiao Zhuang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, China
| | - Shixuan Jiang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, China
| | - Youzhi Wang
- Chengdu Guibao Science and Technology Co., Ltd, Chengdu, 610041 Sichuan, China
| | - Xiajun Wang
- Chengdu Guibao Science and Technology Co., Ltd, Chengdu, 610041 Sichuan, China
| | - Siwei Shen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 Gansu, China
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2
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Orimi FG, Mirza B, Hossaini Z. Production of benzazepine derivatives via four-component reaction of isatins: study of antioxidant activity. Mol Divers 2021; 25:2171-2182. [PMID: 32524218 DOI: 10.1007/s11030-020-10110-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 05/22/2020] [Indexed: 11/30/2022]
Abstract
In current research, benzazepine derivative is synthesized via a new process of four-component reaction of isatin or its derivatives, α-haloketones, activated acetylenic compounds, isoquinoline and potassium fluoride/clinoptilolite nanoparticles (KF/CP NPs) in acidic solution of H2O2 in water at room temperature. Also, antioxidation property of some prepared benzazepines is investigated by employing trapping diphenyl-picrylhydrazine (DPPH) radical and ability of ferric reduction experiment. Among investigated compounds, compounds 5c have good results relative to BHT and TBHQ as standard antioxidant. Also, the Gram-positive and Gram-negative bacteria disk diffusion research is used for the confirmation of antimicrobial power of some prepared benzazepines. The achieved outcomes of disk diffusion experiment showed that these compounds avoided the growth of bacteria. Our procedure has a few benefits relative to reported method such as good rate of reaction, product with high efficiency, simple removal of catalyst from mixture of reaction. In the yield of the product, KF/clinoptilolite nanoparticles show a satisfactory recyclable activity.
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Affiliation(s)
| | - Behrooz Mirza
- Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran.
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3
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Shen XQ, Yan XW, Zhang XG. A palladium-catalyzed ring-expansion reaction of cyclobutanols with 2-haloanilines leading to benzazepines and quinolines. Chem Commun (Camb) 2021; 57:10234-10237. [PMID: 34528044 DOI: 10.1039/d1cc04395a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general synthesis of 2-aryl benzazepines has been developed through palladium-catalyzed ring-expansion reactions of cyclobutanols with 2-haloanilines; the further oxidative rearrangement reaction of benzazepines provided an efficient synthesis of 2-acyl quinolines. These transformations feature the efficient construction of six- and seven-membered N-containing heterocycles from easily obtained materials with excellent functional group tolerance.
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Affiliation(s)
- Xiao-Qin Shen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.
| | - Xiao-Wei Yan
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, 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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4
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Gholami Orimi F, Mirza B, Hossaini Z. Fe
3
O
4
/ZnO/multi‐walled carbon nanotubes magnetic nanocomposites promoted five components synthesis of new imidazole derivatives. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Behrooz Mirza
- Department of Chemistry Islamic Azad University, Karaj Branch Karaj Iran
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5
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Hossaini Z, Tabarsaei N, Khandan S, Valipour P, Ghorchibeigi M. ZnO/Ag/Fe
3
O
4
nanoparticles supported on carbon nanotubes employing
Petasites hybridus
rhizome water extract: A novel organometallic nanocatalyst for the synthesis of new naphthyridines. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Navisa Tabarsaei
- Department of Chemistry, Gorgan Branch Islamic Azad University Gorgan Iran
| | - Samira Khandan
- Department of Chemistry, Science and Research Branch Islamic Azad University Tehran Iran
| | - Peyman Valipour
- Department of Textile Engineering, Qaemshahr Branch Islamic Azad University Qaemshahr Iran
| | - Mona Ghorchibeigi
- Department of Chemistry, Science and Research Branch Islamic Azad University Tehran Iran
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6
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Hossaini Z, Noushin A, Valipour P, Ghazvini M, Rostam MH. Reusable Fe3O4/ZnO/MWCNTs Magnetic Nanocomposites Promoted Synthesis of New Naphthyridines. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1852285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Annataj Noushin
- Department of Chemistry, Gorgan Branch, Islamic Azad University, Gorgan, Iran
| | - Peiman Valipour
- Department of Textile Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
| | - Maryam Ghazvini
- Department of Chemistry, Payame Noor university, Tehran, Iran
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7
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Soleimani Amiri S. Green production and antioxidant activity study of new pyrrolo[2,1‐a]isoquinolines. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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8
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Mousavi SF, Hossaini Z, Rostami‐Charati F, Nami N. Green synthesis of pyrrolo isoquinolines using in situ synthesis of 4‐hydroxycumarines: Study of antioxidant activity. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
| | | | - Faramarz Rostami‐Charati
- Department of Chemistry, Qaemshahr Branch Islamic Azad University Qaemshahr Iran
- Research Center for Conservation of Culture Relicst (RCCCR) Research institute of Cultural Heritage & Tourism Tehran Iran
| | - Navabeh Nami
- Department of Chemistry, Qaemshahr Branch Islamic Azad University Qaemshahr Iran
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9
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Moghaddas SA, Hossaini Z, Zareyee D. Green synthesis and investigation of antioxidant ability new pyrazines containing pyrrolo[2,1‐a]isoquinolines derivatives. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4091] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Seyyed Ali Moghaddas
- Department of Chemistry, Qaemshahr Branch Islamic Azad University Qaemshahr Iran
| | | | - Daryoush Zareyee
- Department of Chemistry, Qaemshahr Branch Islamic Azad University Qaemshahr Iran
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10
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Stockerl S, Danelzik T, Piekarski DG, García Mancheño O. Mild, Metal-Free Oxidative Ring-Expansion Approach for the Synthesis of Benzo[ b]azepines. Org Lett 2019; 21:4535-4539. [PMID: 31184182 DOI: 10.1021/acs.orglett.9b01433] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Benzo[ b]azepines are important structural motifs for the pharmaceutical industry. However, their syntheses are usually lengthy, involving several steps, transition-metal catalysts, and/or harsh conditions. A novel, general, mild, and metal-free oxidative ring expansion tandem reaction of hydroquinolines with TMSCHN2 as a versatile soft nucleophile to gain access to these valuable compounds in a simple and straightforward manner is presented.
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Affiliation(s)
- Sebastian Stockerl
- Organic Chemistry Institute , University of Münster , D-48149 Münster , Germany
| | - Tobias Danelzik
- Organic Chemistry Institute , University of Münster , D-48149 Münster , Germany
| | - Dariusz G Piekarski
- Organic Chemistry Institute , University of Münster , D-48149 Münster , Germany
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11
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Park NH, Vinogradova EV, Surry DS, Buchwald SL. Design of New Ligands for the Palladium-Catalyzed Arylation of α-Branched Secondary Amines. Angew Chem Int Ed Engl 2015; 54:8259-62. [PMID: 26032920 DOI: 10.1002/anie.201502626] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 04/07/2015] [Indexed: 11/05/2022]
Abstract
In Pd-catalyzed C-N cross-coupling reactions, α-branched secondary amines are difficult coupling partners and the desired products are often produced in low yields. In order to provide a robust method for accessing N-aryl α-branched tertiary amines, new catalysts have been designed to suppress undesired side reactions often encountered when these amine nucleophiles are used. These advances enabled the arylation of a wide array of sterically encumbered amines, highlighting the importance of rational ligand design in facilitating challenging Pd-catalyzed cross-coupling reactions.
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Affiliation(s)
- Nathaniel H Park
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA)
| | - Ekaterina V Vinogradova
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA)
| | - David S Surry
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA)
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA).
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12
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Park NH, Vinogradova EV, Surry DS, Buchwald SL. Design of New Ligands for the Palladium-Catalyzed Arylation of α-Branched Secondary Amines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502626] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Sirvent JA, Foubelo F, Yus M. Stereoselective synthesis of indoline, tetrahydroquinoline, and tetrahydrobenzazepine derivatives from o-bromophenyl N-tert-butylsulfinyl aldimines. J Org Chem 2014; 79:1356-67. [PMID: 24447196 DOI: 10.1021/jo402759v] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The diastereoselective addition of an allylic indium intermediate to chiral o-bromophenyl sulfinyl imine 4 proceeded with good levels of diastereoselectivity. The resulting homoallylic amine derivatives were transformed into lactams 7 and 12, which upon copper-mediated intramolecular N-arylation led to the formation of benzo-fused 1-azabicyclo[j.k.0]alkanes 8 and 13. Benzo-fused 2-allyl-substituted heterocycles 14 could also be prepared by means of a palladium-catalyzed N-arylation of the corresponding free amines. The synthesis of the alkaloid (−)-angustureine was easily accomplished from (S)-2-allyltetrahydroquinoline (14b).
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14
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Franzoni I, Mazet C. Recent trends in Pd-catalyzed remote functionalization of carbonyl compounds. Org Biomol Chem 2014; 12:233-41. [DOI: 10.1039/c3ob42050g] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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16
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Saget T, Cramer N. Palladium(0)-catalyzed enantioselective C-H arylation of cyclopropanes: efficient access to functionalized tetrahydroquinolines. Angew Chem Int Ed Engl 2012; 51:12842-5. [PMID: 23161777 DOI: 10.1002/anie.201207959] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Tanguy Saget
- Laboratory of Asymmetric Catalysis and Synthesis, EPFL SB ISIC LCSA, BCH 4305, 1015 Lausanne, Switzerland
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17
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Saget T, Cramer N. Palladium(0)-Catalyzed Enantioselective CH Arylation of Cyclopropanes: Efficient Access to Functionalized Tetrahydroquinolines. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207959] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Beletskaya IP, Cheprakov AV. The Complementary Competitors: Palladium and Copper in C–N Cross-Coupling Reactions. Organometallics 2012. [DOI: 10.1021/om300683c] [Citation(s) in RCA: 348] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Das Adhikary N, Chattopadhyay P. Synthesis of Chiral Benzoxa(thia)zepine and Pyridoxazepine Derivatives Using Palladium-Catalyzed Intramolecular Aryl Amination Reaction. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101174] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Acosta LM, Palma A, Bahsas A. Rational use of substituted N-allyl and N,N-diallylanilines in the stereoselective synthesis of novel 2-alkenyltetrahydro-1-benzazepines. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.08.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Crawley ML, Phipps KM, Goljer I, Mehlmann JF, Lundquist JT, Ullrich JW, Yang C, Mahaney PE. Efficient, regioselective palladium-catalyzed tandem Heck-isomerization reaction of aryl bromides and non-allylic benzyl alcohols. Org Lett 2010; 11:1183-5. [PMID: 19209924 DOI: 10.1021/ol900036y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and mild method to couple aryl bromides and activated non-allylic alcohols in a Heck reaction with tandem isomerization to selectively afford high yields of 1,5-diarylalkan-1-ones has been developed. Mechanistic insight was gained through NMR studies of products derived from deuterium-labeled intermediates.
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Affiliation(s)
- Matthew L Crawley
- Discovery Medicinal Chemistry, Chemical Sciences, Wyeth Research, 500 Arcola Road, Collegeville, Pennsylvania 19426, USA.
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22
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Intramolecular N-arylation in heterocyclization: synthesis of new pyrido-fused pyrrolo[1,2-a][1,4]diazepinones. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.05.121] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Synthesis, structural elucidation and in vitro antiparasitic activity against Trypanosoma cruzi and Leishmania chagasi parasites of novel tetrahydro-1-benzazepine derivatives. Bioorg Med Chem 2010; 18:4721-39. [DOI: 10.1016/j.bmc.2010.05.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Revised: 05/03/2010] [Accepted: 05/05/2010] [Indexed: 11/20/2022]
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24
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Venkata Prasad J, Prabhakar M, Manjulatha K, Rambabu D, Anand Solomon K, Gopi Krishna G, Anil Kumar K. Efficient catalyst-free Domino approach for the synthesis of novel 2-benzazepine derivatives in water. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.04.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Bower JF, Rujirawanich J, Gallagher T. N-Heterocycle construction via cyclic sulfamidates. Applications in synthesis. Org Biomol Chem 2010; 8:1505-19. [DOI: 10.1039/b921842d] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Rujirawanich J, Gallagher T. Substituted 1,4-Benzoxazepines, 1,5-Benzoxazocines, and N- and S-Variants. Org Lett 2009; 11:5494-6. [DOI: 10.1021/ol9023453] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Bunce RA, Johnson LB, Holt EM. Diastereoselective synthesis of substituted 2,3,4,5-tetrahydro-1H-1-benzazepine-5-carboxylic esters by a tandem reduction-reductive animation reaction. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.5570410413] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Delineating ligand effects in intramolecular aryl amidation reactions: formation of a novel spiro-heterocycle by a tandem cyclisation process. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.10.098] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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OSHIMA M, INOUE N. Theoretical Studies of the β-Hydrogen Elimination from π-Allyl Palladium Complexes. JOURNAL OF COMPUTER CHEMISTRY-JAPAN 2009. [DOI: 10.2477/jccj.h2031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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30
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Satyanarayana G, Maier ME. Formation of Spirocyclic Compounds from Heck Cyclizations Invoking Cyclic Enamides. J Org Chem 2008; 73:5410-5. [DOI: 10.1021/jo800650e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gedu Satyanarayana
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Martin E. Maier
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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31
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Boto A, Hernández D, Hernández R. Efficient Conversion of Carbohydrates into 1-C-Alditols: Application to the Synthesis of Chiral γ-Substituted Butenolides and Bicyclic Alkaloid Analogues. J Org Chem 2008; 73:5287-97. [DOI: 10.1021/jo800478a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alicia Boto
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
| | - Dácil Hernández
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
| | - Rosendo Hernández
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
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32
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Kotha S, Shah VR. Design and Synthesis of 1-Benzazepine Derivatives by Strategic Utilization of Suzuki–Miyaura Cross-Coupling, Aza-Claisen Rearrangement and Ring-Closing Metathesis. European J Org Chem 2008. [DOI: 10.1002/ejoc.200700921] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Synthesis of 1,5-methano-3-benzazocines by intramolecular Buchwald–Hartwig arylation of 2-piperidinones. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.10.088] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Chattopadhyay P, Pada Majhi T, Achari B. Advances in the Synthesis and Biological Perspectives of Benzannulated Medium Ring Heterocycles. HETEROCYCLES 2007. [DOI: 10.3987/rev-07-612] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Yépez AF, Palma A, Stashenko E, Bahsas A, Amaro-Luis JM. 2-Allyl-N-benzyl substituted α-naphthylamines as building blocks in heterocyclic synthesis. New and efficient syntheses of benz[e]naphtho[1,2-b]azepine and naphtho[1,2-b]azepine derivatives. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.04.160] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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37
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Qadir M, Cobb J, Sheldrake PW, Whittall N, White AJP, Hii KKM, Horton PN, Hursthouse MB. Conformation analyses, dynamic behavior and amide bond distortions of medium-sized heterocycles. 1. Partially and fully reduced 1-benzazepines. J Org Chem 2005; 70:1545-51. [PMID: 15730272 DOI: 10.1021/jo048118b] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Five 1-benzazepine heterocycles were synthesized by utilizing transition-metal-catalyzed processes in key bond-forming steps. exo-Methylene and methyl substituents were introduced at position 5, as well as a unit of unsaturation between positions 3 and 4, with benzoyl or benzyl N-substituents. Solution- and solid-state structures were examined, using dynamic NMR spectroscopy and X-ray crystallography, corroborated by molecular mechanics calculations. Greater amide distortion is associated with a more stable ground-state structure, which is in turn more reluctant to undergo conformational changes.
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Affiliation(s)
- Maryiam Qadir
- Department of Chemistry, King's College London, Strand WC2R 2LS, UK
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38
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Solé D, Vallverdú L, Solans X, Font-Bardia M. Synthesis of novel palladium OCN-pincer complexes: unprecedented sequential C(sp3)–H activation and aerobic oxidation in the reaction of N,N-dialkyl-3-[(N,N-dimethylamino)methyl]-2-iodoanilines with Pd2(dba)3. Chem Commun (Camb) 2005:2738-40. [PMID: 15917938 DOI: 10.1039/b502854j] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of N,N-dialkyl-3-[(N,N-dimethylamino)methyl]-2-iodoanilines with Pd2(dba)3 under O2 gives palladium OCN-pincer complexes by means of an unprecedented process that involves the formal aerobic oxidation of C(sp3)-H bonds at the alpha position of the aniline N atom.
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Affiliation(s)
- Daniel Solé
- Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, 08028-Barcelona, Spain.
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