1
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Teng Y, Yang H, Li X, Wang Y, Yin D, Tian Y. A
Bioorthogonal‐Activated
Fluorescence
Turn‐On
Probe Based on
Nitrone‐Modified
1,
8‐Naphthalimide
for
Live‐Cell
Imaging. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yu Teng
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences 1st Xian Nong Tan Street Beijing 100050 China
| | - Hong Yang
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences 1st Xian Nong Tan Street Beijing 100050 China
| | - Xiang Li
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences 1st Xian Nong Tan Street Beijing 100050 China
| | - Yongcheng Wang
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences 1st Xian Nong Tan Street Beijing 100050 China
| | - Dali Yin
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences 1st Xian Nong Tan Street Beijing 100050 China
| | - Yulin Tian
- State Key Laboratory of Bioactive Substances and Function of Natural Medicine, Beijing Key Laboratory of Active Substances Discovery and Drugability Evaluation, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences 1st Xian Nong Tan Street Beijing 100050 China
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2
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Caramelli D, Granda J, Mehr SHM, Cambié D, Henson AB, Cronin L. Discovering New Chemistry with an Autonomous Robotic Platform Driven by a Reactivity-Seeking Neural Network. ACS CENTRAL SCIENCE 2021; 7:1821-1830. [PMID: 34849401 PMCID: PMC8620554 DOI: 10.1021/acscentsci.1c00435] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Indexed: 05/04/2023]
Abstract
We present a robotic chemical discovery system capable of navigating a chemical space based on a learned general association between molecular structures and reactivity, while incorporating a neural network model that can process data from online analytics and assess reactivity without knowing the identity of the reagents. Working in conjunction with this learned knowledge, our robotic platform is able to autonomously explore a large number of potential reactions and assess the reactivity of mixtures, including unknown chemical spaces, regardless of the identity of the starting materials. Through the system, we identified a range of chemical reactions and products, some of which were well-known, some new but predictable from known pathways, and some unpredictable reactions that yielded new molecules. The validation of the system was done within a budget of 15 inputs combined in 1018 reactions, further analysis of which allowed us to discover not only a new photochemical reaction but also a new reactivity mode for a well-known reagent (p-toluenesulfonylmethyl isocyanide, TosMIC). This involved the reaction of 6 equiv of TosMIC in a "multistep, single-substrate" cascade reaction yielding a trimeric product in high yield (47% unoptimized) with the formation of five new C-C bonds involving sp-sp2 and sp-sp3 carbon centers. An analysis reveals that this transformation is intrinsically unpredictable, demonstrating the possibility of a reactivity-first robotic discovery of unknown reaction methodologies without requiring human input.
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3
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Efremova MM, Makarova AA, Novikov AS, Kryukova MA, Kuznetsov MA, Molchanov AP. Regio- and stereoselective (3 + 2)-cycloaddition reactions of nitrones with cyclic allenes. Org Biomol Chem 2021; 19:9773-9784. [PMID: 34730596 DOI: 10.1039/d1ob01584b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An effective approach to access functionalized 2H-cyclonona(deca)[d]isoxazoles and 15-oxo-3,10-methanobenzo[b][1]azacyclododecines has been developed by the reaction of N-aryl-C,C-bis(methoxycarbonyl)nitrones with cyclonona(deca)-1,2-dienes in a one-pot fashion. The reaction of N-aryl-C-(phenylcarbamoyl)nitrones with these allenes proceeds strictly regioselectively giving the mixtures of diastereomeric isoxazolidines containing a double bond at the C4-position of the isoxazolidine ring. The quantum chemical calculations show that the regioselectivity of these reactions is in good agreement with the reactivity indices of the considered compounds.
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Affiliation(s)
- Mariia M Efremova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia.
| | - Anastasia A Makarova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia.
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia.
| | - Mariya A Kryukova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia.
| | - Mikhail A Kuznetsov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia.
| | - Alexander P Molchanov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, Saint Petersburg 199034, Russia.
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4
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Zhang G, Alshreimi AS, Alonso L, Antar A, Yu H, Islam SM, Anderson LL. Nitrone and Alkyne Cascade Reactions for Regio‐ and Diastereoselective 1‐Pyrroline Synthesis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Guanqun Zhang
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Abdullah S. Alshreimi
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Laura Alonso
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Alan Antar
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Hsien‐Cheng Yu
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Shahidul M. Islam
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W Taylor St. MC 111 Chicago IL 60607 USA
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5
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Zhang G, Alshreimi AS, Alonso L, Antar A, Yu HC, Islam SM, Anderson LL. Nitrone and Alkyne Cascade Reactions for Regio- and Diastereoselective 1-Pyrroline Synthesis. Angew Chem Int Ed Engl 2021; 60:13089-13097. [PMID: 33763941 DOI: 10.1002/anie.202101511] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/06/2021] [Indexed: 12/22/2022]
Abstract
The synthesis of 1-pyrrolines from N-alkenylnitrones and alkynes has been explored as a retrosynthetic alternative to traditional approaches. These cascade reactions are formal [4+1] cycloadditions that proceed through a proposed dipolar cycloaddition and N-alkenylisoxazoline [3,3']-sigmatropic rearrangement. A variety of cyclic alkynes and terminal alkynes have been shown to undergo the transformation with N-alkenylnitrones under mild conditions to provide the corresponding spirocyclic and densely substituted 1-pyrrolines with high regio- and diastereoselectivity. Mechanistic studies provide insight into the balance of steric and electronic effects that promote the cascade process and control the diastereo- and regioisomeric preferences of the 1-pyrroline products. Diastereoselective derivatization of the 1-pyrrolines prepared by the cascade reaction demonstrate the divergent synthetic utility of the new method.
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Affiliation(s)
- Guanqun Zhang
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Abdullah S Alshreimi
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Laura Alonso
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Alan Antar
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Hsien-Cheng Yu
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Shahidul M Islam
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
| | - Laura L Anderson
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor St. MC 111, Chicago, IL, 60607, USA
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6
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Cycloaddition of nitrones to 1,3-diarylpropenones and subsequent transformations of the resulting isoxazolidines. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02797-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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7
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Guo W, Gu J, Gu Z. Catalytic Asymmetric Synthesis of Atropisomeric Nitrones: Versatile Intermediate for Axially Chiral Biaryls. Org Lett 2020; 22:7622-7628. [DOI: 10.1021/acs.orglett.0c02830] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wenjing Guo
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Jian Gu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
| | - Zhenhua Gu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China
- Ocean College, Minjiang University, Fuzhou, Fujian 350108, P. R. China
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8
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Alshreimi AS, Zhang G, Reidl TW, Peña RL, Koto N, Islam SM, Wink DJ, Anderson LL. Synthesis of Spirocyclic 1‐Pyrrolines from Nitrones and Arynes through a Dearomative [3,3′]‐Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2020; 59:15244-15248. [DOI: 10.1002/anie.202004652] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/30/2020] [Indexed: 01/21/2023]
Affiliation(s)
- Abdullah S. Alshreimi
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Guanqun Zhang
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Ricardo L. Peña
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Nicholas‐George Koto
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Shahidul M. Islam
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
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9
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Alshreimi AS, Zhang G, Reidl TW, Peña RL, Koto N, Islam SM, Wink DJ, Anderson LL. Synthesis of Spirocyclic 1‐Pyrrolines from Nitrones and Arynes through a Dearomative [3,3′]‐Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Abdullah S. Alshreimi
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Guanqun Zhang
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Ricardo L. Peña
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Nicholas‐George Koto
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Shahidul M. Islam
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
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10
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Regio- and diastereoselectivity of the cycloaddition of nitrones with N-propadienylindole and pyrroles. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.11.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Mo XL, Chen CH, Liang C, Mo DL. Copper-Catalyzed Carbonyl Group Controlled Coupling of Isatin Oximes with Arylboronic Acids To Prepare N
-Aryloxindole Nitrones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701324] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xue-Ling Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences; Guangxi Normal University; 15 Yu Cai Road 541004 Guilin China
| | - Chun-Hua Chen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences; Guangxi Normal University; 15 Yu Cai Road 541004 Guilin China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences; Guangxi Normal University; 15 Yu Cai Road 541004 Guilin China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences; Guangxi Normal University; 15 Yu Cai Road 541004 Guilin China
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12
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Efremova MM, Kostikov RR, Stepakov AV, Panikorovsky TL, Shcherbakova VS, Ivanov AV, Molchanov AP. Unusual Lewis-acid catalyzed formal (3+3)-cycloaddition of azomethine imines and nitrones to N-vinylpyrroles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Maiuolo L, Merino P, Algieri V, Nardi M, Di Gioia ML, Russo B, Delso I, Tallarida MA, De Nino A. Nitrones and nucleobase-containing spiro-isoxazolidines derived from isatin and indanone: solvent-free microwave-assisted stereoselective synthesis and theoretical calculations. RSC Adv 2017. [DOI: 10.1039/c7ra09995a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Here, we present a highly efficient approach to nucleobase-containing spiro-isoxazolidines with potential biological activity starting from isatinyl/indanyl nitrones.
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Affiliation(s)
- Loredana Maiuolo
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
| | - Pedro Merino
- Institute of Biocomputation and Physics of Complex Systems (BIFI)
- Universidad de Zaragoza-CSIC
- 50009 Zaragoza
- Spain
| | - Vincenzo Algieri
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
| | - Monica Nardi
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
- Dipartimento di Agraria
| | - Maria Luisa Di Gioia
- Dipartimento di Farmacia e Scienze della Salute e della Nutrizione
- Università della Calabria
- 87036 Rende
- Italy
| | - Beatrice Russo
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
| | - Ignacio Delso
- Servicio de Resonancia Magnética Nuclear
- CEQMA
- Universidad de Zaragoza-CSIC
- 50009 Zaragoza
- Spain
| | | | - Antonio De Nino
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
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14
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Kaur M, Singh B, Singh B, Arjuna A. Synthesis and Evaluation of Novel Spiro[oxindole-isoxazolidine] Derivatives as Potent Antioxidants. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2712] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Manpreet Kaur
- Department of Chemistry; Punjabi University; Patiala 147002 India
| | - Baldev Singh
- Department of Chemistry; Punjabi University; Patiala 147002 India
| | - Baljit Singh
- Department of Chemistry; Punjabi University; Patiala 147002 India
| | - Anania Arjuna
- Faculty of Applied Medical Sciences; Lovely Professional University; Phagwara 144402 India
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15
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Affiliation(s)
- Andrey A. Tabolin
- N. D. Zelinsky
Institute
of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt
47, Moscow 119991, Russian Federation
| | - Sema L. Ioffe
- N. D. Zelinsky
Institute
of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt
47, Moscow 119991, Russian Federation
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16
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P. Sibi M, L. Dunkle K, Rane D. Regio- and Enantioselective Nitrone Cycloaddition to Alkynones for the Synthesis of Δ4-Isoxazolines. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)118] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Chavannavar AP, Oliver AG, Ashfeld BL. An umpolung approach toward N-aryl nitrone construction: a phosphine-mediated addition of 1,2-dicarbonyls to nitroso electrophiles. Chem Commun (Camb) 2014; 50:10853-6. [DOI: 10.1039/c4cc05044d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An umpolung strategy toward the chemoselective construction ofN-aryl nitrones employing a phosphine-mediated addition of 1,2-dicarbonyls to nitroso arenes is described.
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Affiliation(s)
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Notre Dame, USA
| | - Brandon L. Ashfeld
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Notre Dame, USA
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18
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Construction of spiro[indoline]oxindoles through one-pot thermal-induced [3+2] cycloaddition/silica gel-promoted fragmentation sequence between isatin ketonitrones and electron-deficient alkynes. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.062] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Yang HB, Shi M. Yb(NTf2)3-catalyzed [3 + 3] cycloaddition between isatin ketonitrones and cyclopropanes to construct novel spiro[tetrahydro-1,2-oxazine]oxindoles. Org Biomol Chem 2012; 10:8236-43. [DOI: 10.1039/c2ob26413g] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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21
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Mehrdad M, Faraji L, Jadidi K, Eslami P, Sureni H. A regioselective and diastereoselective synthesis of new spiro-isoxazolidines via 1,3-dipolar cycloaddition of stable isatin ketonitrone and various dipolarophiles. MONATSHEFTE FUR CHEMIE 2011. [DOI: 10.1007/s00706-011-0518-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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23
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Pfeiffer JY, Beauchemin AM. Simple reaction conditions for the formation of ketonitrones from ketones and hydroxylamines. J Org Chem 2010; 74:8381-3. [PMID: 19791735 DOI: 10.1021/jo901653d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The condensation of ketones and hydroxylamines to form ketonitrones was reinvestigated by using thermal conditions previously found to minimize hydroxylamine decomposition (t-BuOH, 110 degrees C). This simple approach allows the formation of exocyclic, acyclic, and alpha,beta-unsaturated ketonitrones with benzylic, linear, and branched nitrogen substituents in modest to excellent isolated yields.
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Affiliation(s)
- Jennifer Y Pfeiffer
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
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24
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Shi Z, Zhang C, Li S, Pan D, Ding S, Cui Y, Jiao N. Indoles from simple anilines and alkynes: palladium-catalyzed C-H activation using dioxygen as the oxidant. Angew Chem Int Ed Engl 2009; 48:4572-6. [PMID: 19444850 DOI: 10.1002/anie.200901484] [Citation(s) in RCA: 356] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Pd doles it out: A palladium-catalyzed approach to indoles using the title reaction was achieved (see scheme). The oxidant used in this catalytic cycle was O(2). Both N-nonsubstituted and N-alkyl monosubstituted anilines can be successfully transformed into the corresponding indoles by this method.
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Affiliation(s)
- Zhuangzhi Shi
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100083, China
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25
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Shi Z, Zhang C, Li S, Pan D, Ding S, Cui Y, Jiao N. Indoles from Simple Anilines and Alkynes: Palladium-Catalyzed CH Activation Using Dioxygen as the Oxidant. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200901484] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Moran J, Pfeiffer JY, Gorelsky SI, Beauchemin AM. Ketonitrones via Cope-Type Hydroamination of Allenes. Org Lett 2009; 11:1895-8. [DOI: 10.1021/ol900292r] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph Moran
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - Jennifer Y. Pfeiffer
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - Serge I. Gorelsky
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - André M. Beauchemin
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
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27
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A facile stereoselective synthesis of 2-perfluoroalkyl-3a,4,5,6-tetrahydroimidazo[1,5-b]isoxazoles. J Fluor Chem 2009. [DOI: 10.1016/j.jfluchem.2008.11.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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El Hassan I, Charles L, Lauricella R, Tuccio B. Detection and identification of various carbon-centred free radicals using N-arylketonitrones: a spin trapping/EPR/MS study. NEW J CHEM 2008. [DOI: 10.1039/b713790g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tomioka Y, Ohkubo K, Maruoka H. A novel synthesis of indole derivatives by the reaction ofN-arylhydroxamic acids with malononitrile. J Heterocycl Chem 2007. [DOI: 10.1002/jhet.5570440222] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
AbstractThe syntheses of seven N-aryl-C,C-dialkoxycarbonylnitrones 1–7, six of which were original, were achieved from the appropriate aryl-nitroso compounds. These ketonitrones were found to trap efficiently carbon-centred free radicals in aqueous media, yielding stable aminoxyl radicals whose EPR spectra lasted several days. The two penta-deuterated compounds 6 and 7 were also found to be efficient at trapping methoxyl radical. Their various spin adducts showed simple three line signals, very sensitive to the polarity of the environment. This study represents the very first use of linear ketonitrones as spin traps.
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