1
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Li Z, Zhang Y, Sun M, Zhang Y, Lu Z, Deng Y, Huang X, Shen G. La(OTf) 3-Catalyzed [3+2] Cycloaddition Reactions for the Synthesis of Benzo[ d]oxazoles/Benzofurans. J Org Chem 2024; 89:3809-3820. [PMID: 38395778 DOI: 10.1021/acs.joc.3c02641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
The La(OTf)3-catalyzed [3+2] cycloaddition reactions for the synthesis of benzo[d]oxazoles/benzofurans via quinones and 1,2-di-tert-butyl-3-(cyanimino)diaziridine (1,3-di-tert-butyl-2-cyanoguanidine)/vinyl azides have been explored. A series of 5-hydroxybenzofuran-4-carboxylic acid derivatives and 5-hydroxybenzo[d]oxazole-4-carboxylic acid derivatives were conveniently obtained with high yields and good stereoselectivities, which could be used for further transformations to valuable compounds.
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Affiliation(s)
- Zhanjun Li
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
- Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
| | - Yalin Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
| | - Manman Sun
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
| | - Ye Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
| | - Zhaoxiang Lu
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
| | - Yupeng Deng
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
| | - Xianqiang Huang
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
| | - Guodong Shen
- School of Chemistry and Chemical Engineering, Liaocheng University, 1 Hunan Avenue, Liaocheng 252000, Shandong, P. R. China
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2
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Pratley C, Fenner S, Murphy JA. Nitrogen-Centered Radicals in Functionalization of sp 2 Systems: Generation, Reactivity, and Applications in Synthesis. Chem Rev 2022; 122:8181-8260. [PMID: 35285636 DOI: 10.1021/acs.chemrev.1c00831] [Citation(s) in RCA: 98] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The chemistry of nitrogen-centered radicals (NCRs) has plentiful applications in organic synthesis, and they continue to expand as our understanding of these reactive species increases. The utility of these reactive intermediates is demonstrated in the recent advances in C-H amination and the (di)amination of alkenes. Synthesis of previously challenging structures can be achieved by efficient functionalization of sp2 moieties without prefunctionalization, allowing for faster and more streamlined synthesis. This Review addresses the generation, reactivity, and application of NCRs, including, but not limited to, iminyl, aminyl, amidyl, and aminium species. Contributions from early discovery up to the most recent examples have been highlighted, covering radical initiation, thermolysis, photolysis, and, more recently, photoredox catalysis. Radical-mediated intermolecular amination of (hetero)arenes can occur with a variety of complex amine precursors, generating aniline derivatives, an important class of structures for drug discovery and development. Functionalization of olefins is achievable in high anti-Markovnikov regioselectivity and allows access to difunctionalized structures when the intermediate carbon radicals are trapped. Additionally, the reactivity of NCRs can be harnessed for the rapid construction of N-heterocycles such as pyrrolidines, phenanthridines, quinoxalines, and quinazolinones.
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Affiliation(s)
- Cassie Pratley
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom.,GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts SG1 2NY, United Kingdom
| | - Sabine Fenner
- GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts SG1 2NY, United Kingdom
| | - John A Murphy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
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3
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Wang CC, Wang XL, Zhang QL, Liu JT, Ma ZW, Liu Z, Chen YJ. Direct synthesis for N2-unprotected five-membered cyclic guanidines by regioselective [3+2] annulation of aziridines and cyanamides. Org Chem Front 2022. [DOI: 10.1039/d1qo01926k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and efficient [3+2] annulation of 2-substituted aziridines and N-tosyl cyanamides via domino regioselective ring-opening/5-exo-dig cyclization procedure has been developed, allowing the direct preparation for N2-unprotected five-membered cyclic guanidines...
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4
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Wang CC, Qu YL, Liu XH, Ma ZW, Yang B, Liu ZJ, Chen XP, Chen YJ. Synthesis of Five-Membered Cyclic Guanidines via Cascade [3 + 2] Cycloaddition of α-Haloamides with Organo-cyanamides. J Org Chem 2021; 86:3546-3554. [PMID: 33538590 DOI: 10.1021/acs.joc.0c02932] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The convenient preparation of N2-unprotected five-membered cyclic guanidines was achieved through a cascade [3 + 2] cycloaddition between organo-cyanamides and α-haloamides under mild conditions in good to excellent yields (up to 99%). The corresponding cyclic guanidines could be easily transformed into hydantoins via hydrolysis.
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Affiliation(s)
- Chuan-Chuan Wang
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China.,College of Chemistry, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Ya-Li Qu
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Xue-Hua Liu
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Zhi-Wei Ma
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China
| | - Bo Yang
- College of Chemistry, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
| | - Zhi-Jing Liu
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China
| | - Xiao-Pei Chen
- Faculty of Science, Henan University of Animal Husbandry and Economy, No. 146 Yingcai Street, Zhengzhou 450044, Henan, China
| | - Ya-Jing Chen
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education of China; Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, Henan, China
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5
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Ohuchi S, Koyama H, Shigehisa H. Catalytic Synthesis of Cyclic Guanidines via Hydrogen Atom Transfer and Radical-Polar Crossover. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05359] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shunya Ohuchi
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Hiroki Koyama
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Hiroki Shigehisa
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
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6
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Rao Kovvuri VR, Xue H, Romo D. Generation and Reactivity of 2-Amido-1,3-diaminoallyl Cations: Cyclic Guanidine Annulations via Net (3 + 2) and (4 + 3) Cycloadditions. Org Lett 2020; 22:1407-1413. [PMID: 32009413 DOI: 10.1021/acs.orglett.0c00019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Toward a method for direct conversion of alkenes to cyclic guanidines, we report that 1,3-dipolar cycloadditions of 2-amido-1,3-diamino allylic cations with alkenes provide a new method for direct cyclic guanidine annulation. Generated under oxidative conditions, the 2-amido-1,3-diaminoallyl cations react as 1,3-dipoles providing rapid access to 2-amino imidazolines through net (3 + 2) cycloadditions. The utility is demonstrated through a concise synthesis of the oroidin alkaloid, phakellin. The described 1,3-dipole also participates in net (4 + 3) cycloadditions with dienes.
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Affiliation(s)
- V Raghavendra Rao Kovvuri
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place #97348 , Waco , Texas 76798 , United States
| | - Haoran Xue
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place #97348 , Waco , Texas 76798 , United States
| | - Daniel Romo
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place #97348 , Waco , Texas 76798 , United States
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7
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Perry GJP, Jia T, Procter DJ. Copper-Catalyzed Functionalization of 1,3-Dienes: Hydrofunctionalization, Borofunctionalization, and Difunctionalization. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04767] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gregory J. P. Perry
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Tao Jia
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, People’s Republic of China
| | - David J. Procter
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
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8
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Abstract
At the advent of cross-coupling chemistry, carbon electrophiles based on halides or pseudohalides were the only suitable electrophilic coupling partners. Almost two decades passed before the first cross-coupling reaction of heteroatom-based electrophiles was reported. Early work by Murai and Tanaka initiated investigations into silicon electrophiles. Narasaka and Johnson pioneered the way in the use of nitrogen electrophiles, while Suginome began the exploration of boron electrophiles. The chemistry reviewed within provides perspective on the use of heteroatomic electrophiles, specifically silicon-, nitrogen-, boron-, oxygen-, and phosphorus-based electrophiles in transition-metal catalyzed cross-coupling. For the purposes of this review, a loose definition of cross-coupling is utilized; all reactions minimally proceed via an oxidative addition event. Although not cross-coupling in a traditional sense, we have also included catalyzed reactions that join a heteroatomic electrophile with an in situ generated nucleophile. However, for brevity, those involving hydroamination or C-H activation as a key step are largely excluded. This work includes primary references published up to and including October 2018.
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Affiliation(s)
- Katerina M Korch
- Department of Chemistry and Biochemistry , University of Delaware Newark , Delaware 19716 , United States
| | - Donald A Watson
- Department of Chemistry and Biochemistry , University of Delaware Newark , Delaware 19716 , United States
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9
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Kaur N, Wu F, Alom NE, Ariyarathna JP, Saluga SJ, Li W. Intermolecular alkene difunctionalizations for the synthesis of saturated heterocycles. Org Biomol Chem 2019; 17:1643-1654. [PMID: 30452059 DOI: 10.1039/c8ob02443j] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Saturated heterocycles are important structural motifs in a range of pharmaceuticals and agrochemicals. As a result of their importance, syntheses of these molecules have been extensively investigated. Despite the progress in this area, the most adopted strategies are still often characterized with inefficiency or relying on functionalizations with specialized precursors and pre-existing cores. This review highlights a dynamic synthetic strategy for the direct synthesis of saturated heterocycles from intermolecular alkene difunctionalizations. These coupling processes are highly modular, and therefore, offer perhaps the most convenient means to prepare diverse heterocyclic structures in compound libraries for bioactivity evoluations.
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Affiliation(s)
- Navdeep Kaur
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606, USA.
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10
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Jin H, Dai C, Huang Y. DBU-Catalyzed Desymmetrization of Cyclohexadienones: Access to Vicinal Diamine-Containing Heterocycles. Org Lett 2018; 20:5006-5009. [DOI: 10.1021/acs.orglett.8b02158] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hongxing Jin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 30071, China
| | - Changhang Dai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 30071, China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 30071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 30071, China
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11
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van Leest NP, Epping RF, van Vliet KM, Lankelma M, van den Heuvel EJ, Heijtbrink N, Broersen R, de Bruin B. Single-Electron Elementary Steps in Homogeneous Organometallic Catalysis. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2018. [DOI: 10.1016/bs.adomc.2018.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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12
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Peterson LJ, Luo J, Wolfe JP. Synthesis of Cyclic Guanidines Bearing N-Arylsulfonyl and N-Cyano Protecting Groups via Pd-Catalyzed Alkene Carboamination Reactions. Org Lett 2017; 19:2817-2820. [PMID: 28534637 PMCID: PMC5674782 DOI: 10.1021/acs.orglett.7b00946] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Palladium-catalyzed carboamination reactions of N-allylguanidines bearing cleavable N-cyano or N-arylsulfonyl protecting groups are described. The reactions afford cyclic guanidine products in good yield, and transformations of substrates bearing internal alkenes proceed with high diastereoselectivity. Deuterium labeling studies indicate these transformations proceed via anti-aminopalladation pathways.
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Affiliation(s)
- Luke J. Peterson
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Jingyi Luo
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - John P. Wolfe
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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13
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Guchhait SK, Hura N, Shah AP. Synthesis of Polysubstituted 2-Aminoimidazoles via Alkene-Diamination of Guanidine with Conjugated α-Bromoalkenones. J Org Chem 2017; 82:2745-2752. [PMID: 28195472 DOI: 10.1021/acs.joc.6b03021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A step-economical access to polysubstituted aminoimidazoles has been accomplished via alkene vicinal C-N bonds formation of 2-bromo-2-alkenones with guanidine avoiding its NH-protection/derivatization prerequisite for electronic modulation. The approach has excellent substrate scope, is amenable to diverse guanidine-containing substrates, and introduces distinctive substitutions/functionalities into aminoimidazole core. It is also applicable to preparation of fused-imidazoles. The reaction involves a tandem pathway of aza-Michael addition, SN2, and a unique redox-neutral process, as evident by spectroscopic study and control experiments.
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Affiliation(s)
- Sankar K Guchhait
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, SAS Nagar (Mohali), Punjab 160062, India
| | - Neha Hura
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, SAS Nagar (Mohali), Punjab 160062, India
| | - Archana P Shah
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) , Sector 67, SAS Nagar (Mohali), Punjab 160062, India
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14
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Garlets ZJ, Silvi M, Wolfe JP. Synthesis of Cyclic Guanidines via Silver-Catalyzed Intramolecular Alkene Hydroamination Reactions of N-Allylguanidines. Org Lett 2016; 18:2331-4. [PMID: 27181609 PMCID: PMC4924592 DOI: 10.1021/acs.orglett.6b00598] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The silver-catalyzed hydroamination of tosyl-protected N-allylguanidines is described. These reactions provide substituted cyclic guanidines in high yields. The reactions are amenable to the construction of quaternary stereocenters as well as both monocyclic and bicyclic guanidine products.
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Affiliation(s)
- Zachary J. Garlets
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Mattia Silvi
- ICIQ–Institute of Chemical Research of Catalonia, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - John P. Wolfe
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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15
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Zhu X, Chiba S. Copper-catalyzed oxidative carbon–heteroatom bond formation: a recent update. Chem Soc Rev 2016; 45:4504-23. [DOI: 10.1039/c5cs00882d] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review updates recent advances in Cu-catalyzed (anaerobic) oxidative carbon–heteroatom bond formation on sp3- and sp2-C–H bonds as well as alkenes, classified according to the types of stoichiometric oxidants.
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Affiliation(s)
- Xu Zhu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
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16
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Facile access to oxazolidin-2-imine, thiazolidin-2-imine and imidazolidin-2-imine derivatives bearing an exocyclic haloalkyliene via direct halocyclization between propargylamines, heterocumulenes and I2 (NBS). Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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17
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Kitamura M, Yuasa R, Van Vranken DL. Synthesis of the cyclic prenylguanidine nitensidine E using a palladium-catalyzed carbenylative amination. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.10.140] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Zhang J, Zhang X, Wu W, Zhang G, Xu S, Shi M. Intramolecular aminochalcogenation and diamination of alkenes employing N-iodosuccinimide. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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19
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Fu S, Yang H, Li G, Deng Y, Jiang H, Zeng W. Copper(II)-Catalyzed Enantioselective Intramolecular Cyclization of N-Alkenylureas. Org Lett 2015; 17:1018-21. [DOI: 10.1021/acs.orglett.5b00131] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shaomin Fu
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Honghao Yang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Guoqiang Li
- Analysis
and Testing Center, Jinan University, Guangzhou 510632, China
| | - Yuanfu Deng
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Wei Zeng
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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20
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Zhang J, Wu W, Zhang X, Zhang G, Xu S, Shi M. NIS/PhI(OAc)2-Mediated Diamination/Oxidation ofN-Alkenyl Formamidines: Facile Synthesis of Fused Tricyclic Ureas. Chem Asian J 2015; 10:544-7. [DOI: 10.1002/asia.201403281] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Indexed: 12/14/2022]
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21
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Zhang WX, Xu L, Xi Z. Recent development of synthetic preparation methods for guanidines via transition metal catalysis. Chem Commun (Camb) 2015; 51:254-65. [DOI: 10.1039/c4cc05291a] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This article provides an overview of guanidine synthesis via transition-metal-catalyzed reactions including cycloaddition, guanylation and tandem guanylation/cyclization.
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Affiliation(s)
- Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences
- and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Ling Xu
- Beijing National Laboratory for Molecular Sciences
- and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences
- and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
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22
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Shaw JW, Grayson DH, Rozas I. Synthesis of Guanidines and Some of Their Biological Applications. TOPICS IN HETEROCYCLIC CHEMISTRY 2015. [DOI: 10.1007/7081_2015_174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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23
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Bartels B, Bolas CG, Cueni P, Fantasia S, Gaeng N, Trita AS. Cu-catalyzed aerobic oxidative cyclization of guanidylpyridines and derivatives. J Org Chem 2014; 80:1249-57. [PMID: 25495477 DOI: 10.1021/jo502536t] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A new method for the straightforward synthesis of 2-amino-[1,2,4]triazolo[1,5-a]pyridines and derivatives is presented. The target products are synthesized in high yields from guanidylpyridines and analogues via copper-catalyzed N-N coupling. The present methodology shows a wide scope, tolerating not only different substituents on the pyridine ring but also different heterocylic rings such as pyrazines, pyrimidines, and pyridazines.
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Affiliation(s)
- Björn Bartels
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Basel, preclinical CMC, Process Research, F. Hoffmann-La Roche Ltd. , Grenzacherstrasse 124, 4070 Basel, Switzerland
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24
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Zhu Y, Cornwall RG, Du H, Zhao B, Shi Y. Catalytic diamination of olefins via N-N bond activation. Acc Chem Res 2014; 47:3665-78. [PMID: 25402963 PMCID: PMC4270412 DOI: 10.1021/ar500344t] [Citation(s) in RCA: 235] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
Vicinal diamines are important structural motifs present in various
biologically and chemically significant molecules. Direct diamination
of olefins provides an effective approach to this class of compounds.
Unlike well-established oxidation processes such as epoxidation, dihydroxylation,
and aminohydroxylation, direct diamination of olefins had remained
a long-standing challenge and had been less well developed. In this Account, we summarize our recent studies on Pd(0)- and
Cu(I)-catalyzed diaminations of olefins using di-tert-butyldiaziridinone and its related analogues as nitrogen sources
via N–N bond activation. A wide variety of imidazolidinones,
cyclic sulfamides, indolines, imidazolinones, and cyclic guanidines
can be obtained from conjugated dienes and terminal olefins. For conjugated
dienes, the diamination proceeds regioselectively at the internal
double bond with the Pd(0) catalyst. Mechanistic studies show that
the diamination likely involves a four-membered Pd(II) species resulting
from the insertion of Pd(0) into the N–N bond of di-tert-butyldiaziridinone. Interestingly, the Cu(I)-catalyzed
process occurs regioselectively at either the terminal or internal
double bond depending on the reaction conditions via two mechanistically
distinct pathways. The Cu(I) catalyst cleaves the N–N bond
of di-tert-butyldiaziridinone to form a Cu(II) nitrogen
radical and a four-membered Cu(III) species, which are likely in rapid
equilibrium. The Cu(II) nitrogen radical and the four-membered Cu(III)
species lead to the terminal and internal diamination, respectively. Terminal olefins are effectively C–H diaminated at the allylic
and homoallylic carbons with Pd(0) as catalyst and di-tert-butyldiaziridinone as nitrogen source, likely involving a diene
intermediate generated in situ from the terminal olefin via formation
of a π-allyl Pd complex and subsequent β-hydride elimination.
When di-tert-butylthiadiaziridine 1,1-dioxide is
used as nitrogen source, cyclic sulfamides are installed at the terminal
carbons via a dehydrogenative diamination process. When α-methylstyrenes
(lacking homoallylic hydrogens) react with Pd(0) and di-tert-butyldiaziridinone, spirocyclic indolines are formed with generation
of four C–N bonds and one spiro quaternary carbon via allylic
and aromatic C–H amination. With Cu(I) catalysts, various
terminal olefins can be effectively
diaminated at the double bonds using di-tert-butyldiaziridinone,
di-tert-butylthiadiaziridine 1,1-dioxide, and 1,2-di-tert-butyl-3-(cyanimino)-diaziridine as nitrogen sources,
giving a variety of imidazolidinones, cyclic sulfamides, and cyclic
guanidines in good yields, respectively. In the case of monosubstituted
olefins using di-tert-butyldiaziridinone as nitrogen
source, the resulting diamination products (imidazolidinones) are
readily dehydrogenated under the reaction conditions, leading to the
corresponding imidazolinones in good yields. Esters can also be diaminated
to form the corresponding hydantoins with di-tert-butyldiaziridinone in the presence of a Cu(I) catalyst. A radical
mechanism is likely to be operating in these Cu(I)-catalyzed reaction
processes. Asymmetric processes have also been developed for
the Pd(0)- and
Cu(I)-catalyzed diamination reactions. Biologically active compounds
such as (+)-CP-99,994 and Sch 425078 have been synthesized via the
diamination processes. The diamination reactions described herein
provide efficient methods to access a wide variety of vicinal diamines
from readily available olefins and show great potential for synthetic
applications.
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Affiliation(s)
- Yingguang Zhu
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Richard G. Cornwall
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Haifeng Du
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Baoguo Zhao
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Yian Shi
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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25
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Kwon KH, Serrano CM, Koch M, Barrows LR, Looper RE. Synthesis of bicyclic guanidines via cascade hydroamination/Michael additions of mono-N-acryloylpropargylguanidines. Org Lett 2014; 16:6048-51. [PMID: 25393831 PMCID: PMC4260634 DOI: 10.1021/ol502691w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cascade silver(I)-catalyzed hydroamination/Michael addition sequence has been developed to deliver highly substituted bicyclic guanidines. This transformation gives rise to geometrically and constitutionally stable ene-guanidines and generates a remote stereocenter with moderate to high diastereoselectivity.
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Affiliation(s)
- Ki-Hyeok Kwon
- †Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Catherine M Serrano
- †Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Michael Koch
- ‡Department of Pharmacy/Toxicology, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112 United States
| | - Louis R Barrows
- ‡Department of Pharmacy/Toxicology, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112 United States
| | - Ryan E Looper
- †Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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26
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Huang CYD, Doyle AG. The chemistry of transition metals with three-membered ring heterocycles. Chem Rev 2014; 114:8153-98. [PMID: 24869559 DOI: 10.1021/cr500036t] [Citation(s) in RCA: 375] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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27
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Martínez C, Martínez L, Kirsch J, Escudero-Adán EC, Martin E, Muñiz K. Copper-Mediated 1,4-Diamination of 1,3-Butadienes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301805] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Zavesky BP, Babij NR, Fritz JA, Wolfe JP. Synthesis of cyclic guanidines via Pd-catalyzed alkene carboamination. Org Lett 2013; 15:5420-3. [PMID: 24147839 DOI: 10.1021/ol402377y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A new approach to the synthesis of substituted 5-membered cyclic guanidines is described. Palladium-catalyzed alkene carboamination reactions between acyclic N-allyl guanidines and aryl or alkenyl halides provide these products in good yield. This method allows access to a number of different cyclic guanidine derivatives in only two steps from readily available allylic amines.
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Affiliation(s)
- Blane P Zavesky
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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29
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Kumar R, Ermolat’ev DS, Van der Eycken EV. Synthesis of Differentially Substituted 2-Aminoimidazolidines via a Microwave-Assisted Tandem Staudinger/Aza-Wittig Cyclization. J Org Chem 2013; 78:5737-43. [DOI: 10.1021/jo400481b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Rakesh Kumar
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Denis S. Ermolat’ev
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001 Leuven, Belgium
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30
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Abstract
The development of an intramolecular vicinal diamination protocol using metal-free conditions is discussed. The reaction uses a bromide source to generate a Br(I) catalyst in situ from a benign terminal oxidant such as sodium chlorite. The reaction is of great scope and surpasses the transition-metal catalyses developed so far for these types of reactions.
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31
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Zhu MK, Chen YC, Loh TP. Radical-Mediated Diamination of Alkenes with Phenylhydrazine and Azodicarboxylates: Highly Diastereoselective Synthesis oftrans-Diamines from Cycloalkenes. Chemistry 2013; 19:5250-4. [DOI: 10.1002/chem.201203832] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 02/01/2013] [Indexed: 11/09/2022]
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32
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Muñiz K, Martínez C. Development of intramolecular vicinal diamination of alkenes: from palladium to bromine catalysis. J Org Chem 2013; 78:2168-74. [PMID: 23437968 DOI: 10.1021/jo302472w] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Palladium catalysis has been instrumental in the development of the intramolecular diamination of alkenes. Reagent combinations of a palladium catalyst and iodosobenzene diacetate or copper(II) salts, respectively, represent the broad applicability and mechanistic variation. Recent work has established alternative copper and bromine catalysts. The occupation with this reaction has also contributed to the development of high oxidation state metal catalysis in alkene difunctionalization and significantly broadened the spectrum of Pd-catalyzed C-N bond-forming reactions in general.
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Affiliation(s)
- Kilian Muñiz
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans, 16, E-43007 Tarragona, Spain.
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33
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Synthesis of Saturated Heterocycles via Metal-Catalyzed Alkene Diamination, Aminoalkoxylation, or Dialkoxylation Reactions. TOPICS IN HETEROCYCLIC CHEMISTRY 2013. [DOI: 10.1007/7081_2013_104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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34
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Affiliation(s)
- Raymond T. Gephart
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| | - Timothy H. Warren
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
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35
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Abstract
The 1,2-diamine moiety is a ubiquitous structural motif present in a wealth of natural products, including non-proteinogenic amino acids and numerous alkaloids, as well as in pharmaceutical agents, chiral ligands and organic reagents. The biological activity associated with many of these systems and their chemical utility in general has ensured that the development of methods for their preparation is of critical importance. While a wide range of strategies for the preparation of 1,2-diamines have been established, the diamination of alkenes offers a particularly direct and efficient means of accessing these systems. The purpose of this review is to provide an overview of all methods of direct alkene diamination, metal-mediated or otherwise.
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Affiliation(s)
- Sam de Jong
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607-7061 USA
| | - Daniel G. Nosal
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607-7061 USA
| | - Duncan J. Wardrop
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607-7061 USA
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36
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Souto JA, González Y, Iglesias A, Zian D, Lishchynskyi A, Muñiz K. Iodine(III)-Promoted Intermolecular Diamination of Alkenes. Chem Asian J 2012; 7:1103-11. [DOI: 10.1002/asia.201101025] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Indexed: 12/30/2022]
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37
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Wang YF, Zhu X, Chiba S. Copper-Catalyzed Aerobic [3+2]-Annulation of N-Alkenyl Amidines. J Am Chem Soc 2012; 134:3679-82. [DOI: 10.1021/ja2120629] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yi-Feng Wang
- Division of Chemistry
and Biological Chemistry, School
of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Xu Zhu
- Division of Chemistry
and Biological Chemistry, School
of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry
and Biological Chemistry, School
of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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38
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Chávez P, Kirsch J, Streuff J, Muñiz K. Palladium-Catalyzed Intramolecular Diamination of Acrylic Esters Using Sulfamates as Nitrogen Source. J Org Chem 2012; 77:1922-30. [DOI: 10.1021/jo202507d] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Patricia Chávez
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans,
16, E-43007 Tarragona, Spain
| | - Jonathan Kirsch
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans,
16, E-43007 Tarragona, Spain
| | - Jan Streuff
- Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans,
16, E-43007 Tarragona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Pg. Lluís
Companys 23, 08010 Barcelona, Spain
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39
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Lishchynskyi A, Muñiz K. An Approach to the Regioselective Diamination of Conjugated Di- and Trienes. Chemistry 2012; 18:2212-6. [DOI: 10.1002/chem.201103435] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 12/18/2011] [Indexed: 11/05/2022]
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40
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Zhao F, Wang Y, Zhang WX, Xi Z. Metal-free synthesis of cyclic di-oxoguanidines via one-pot sequential transformation of amines, carbodiimides and acyl dichlorides. Org Biomol Chem 2012; 10:6266-70. [DOI: 10.1039/c2ob25799h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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41
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Chávez P, Kirsch J, Hövelmann CH, Streuff J, Martínez-Belmonte M, Escudero-Adán EC, Martin E, Muñiz K. Metal-free diamination of alkenes employing bromide catalysis. Chem Sci 2012. [DOI: 10.1039/c2sc20242e] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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42
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Zhao B, Peng X, Zhu Y, Ramirez TA, Cornwall RG, Shi Y. Cu(I)-catalyzed diamination of conjugated dienes. Complementary regioselectivity from two distinct mechanistic pathways involving Cu(II) and Cu(III) species. J Am Chem Soc 2011; 133:20890-900. [PMID: 22081888 PMCID: PMC3244543 DOI: 10.1021/ja207691a] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Conjugated dienes can be diaminated at the internal and/or terminal double bonds using Cu(I) as catalyst and N,N-di-t-butyldiaziridinone (1) as nitrogen source. The regioselectivity is highly dependent upon the choice of Cu(I) catalyst and the substituents on diene substrates. The diamination likely proceeds via two mechanistically distinct pathways. The N-N bond of N,N-di-t-butyldiaziridinone (1) is first homolytically cleaved by the Cu(I) catalyst to form four-membered Cu(III) species A and Cu(II) radical species B, which are in rapid equilibrium. The internal diamination likely proceeds in a concerted manner via Cu(III) species A, and the terminal diamination likely involves Cu(II) radical species B. Kinetic studies have shown that the diamination is first-order in N,N-di-t-butyldiaziridinone (1), zero-order in olefin, and first-order in total Cu(I) catalyst, and the cleavage of the N-N bond of 1 by the Cu(I) catalyst is the rate-determining step. The internal diamination is favored by use of CuBr without ligand and electron-rich dienes. The terminal diamination is favored when using CuCl-L and dienes with radical-stabilizing groups.
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Affiliation(s)
- Baoguo Zhao
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Xingao Peng
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Yingguang Zhu
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Thomas A. Ramirez
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | | | - Yian Shi
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
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43
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Röben C, Souto JA, González Y, Lishchynskyi A, Muñiz K. Enantioselektive metallfreie Diaminierung von Styrolen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103077] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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44
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Enantioselective Metal-Free Diamination of Styrenes. Angew Chem Int Ed Engl 2011; 50:9478-82. [DOI: 10.1002/anie.201103077] [Citation(s) in RCA: 249] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Indexed: 12/20/2022]
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45
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Shen H, Wang Y, Xie Z. Ti-amide Catalyzed Synthesis of Cyclic Guanidines from Di-/Triamines and Carbodiimides. Org Lett 2011; 13:4562-5. [DOI: 10.1021/ol201752e] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao Shen
- Department of Chemistry and State Key Laboratory on Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Yang Wang
- Department of Chemistry and State Key Laboratory on Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory on Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
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46
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Muñiz K, Kirsch J, Chávez P. Intermolecular Regioselective 1,2-Diamination of Allylic Ethers. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000813] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Radicals in transition metal catalyzed reactions? transition metal catalyzed radical reactions?: a fruitful interplay anyway: part 3: catalysis by group 10 and 11 elements and bimetallic catalysis. Top Curr Chem (Cham) 2011; 320:323-451. [PMID: 22143611 DOI: 10.1007/128_2011_288] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review summarizes the current status of transition metal catalyzed reactions involving radical intermediates in organic chemistry. This part focuses on radical-based methods catalyzed by group 10 and group 11 metal complexes. Reductive and redox-neutral C-C bond formations catalyzed by low-valent metal complexes as well as catalytic oxidative methods are reviewed. Catalytic processes which rely on the combination of two metal complexes are also covered.
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48
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Iglesias Á, Pérez EG, Muñiz K. Eine intermolekulare Palladium-katalysierte vicinale Diaminierung von nichtaktivierten Alkenen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003653] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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49
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Iglesias Á, Pérez EG, Muñiz K. An Intermolecular Palladium-Catalyzed Diamination of Unactivated Alkenes. Angew Chem Int Ed Engl 2010; 49:8109-11. [DOI: 10.1002/anie.201003653] [Citation(s) in RCA: 147] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Li H, Widenhoefer RA. Intramolecular Diamination and Alkoxyamination of Alkenes with N-Sulfonyl Ureas With N-Iodosuccinimide. Tetrahedron 2010; 66:4827-4831. [PMID: 21566674 PMCID: PMC3090627 DOI: 10.1016/j.tet.2010.03.082] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Reaction of N-δ-alkenyl-N'-sulfonyl urea 1 with N-iodosuccinimde (NIS; 2 equiv) and a catalytic amount of AgOTf (20 mol %) at room temperature led to intramolecular alkoxyamination to form bicyclic isourea 2a in 95% isolated yield. In comparison, reaction of 1 with NIS and sodium bicarbonate (1 equiv) at room temperature led to isolation of bicyclic imidazolidin-2-one 2b in 91% yield. These NIS-mediated alkoxyamination and diamination protocols were effective for a range of N-δ-alkenyl-N'-sulfonyl ureas to form the corresponding heterobicyclic compounds in good yield with high chemoselectivity and good to excellent diastereoselectivity.
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Affiliation(s)
- Hao Li
- French Family Science Center, Duke University, Durham, NC 27708–0346
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