1
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Zars E, Gravogl L, Gau M, Carroll PJ, Meyer K, Mindiola DJ. Iron(II) Mediated Deazotation of Benzyl Azide: Trapping and Subsequent Transformations of the Benzaldimine Fragment. Inorg Chem 2022; 61:1079-1090. [PMID: 34978453 DOI: 10.1021/acs.inorgchem.1c03243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mono-benzaldimine (HN═CHPh) complex [(tBupyrpyrr2)Fe(HN═CHPh)] (1-HN═CHPh) has been prepared by reaction of [(tBupyrpyrr2)Fe(OEt2)] (1-OEt2) (tBupyrpyrr2 = 2,6-bis(3,5-di-tert-butyl-pyrrolyl)pyridine) with one equivalent of benzyl azide. Compound 1-HN═CHPh retains the cis-divacant octahedral coordination geometry akin to 1, as established by single crystal X-ray diffraction study. A bis-HN═CHPh complex [(tBupyrpyrr2)Fe(HN═CHPh)2] (2) was also prepared by the addition of two equivalents of benzyl azide to 1, and its molecular structure exhibits the two HN═CHPh ligands coordinated trans to each other, thereby forming a square pyramidal coordination geometry at the FeII center. Reaction of 1 with excess benzyl azide yields [(tBupyrpyrr2)Fe(HN═CHPh)2·PhCHNCH(NH2)Ph] (2-PhCHNCH(NH2)Ph), which contains an unstable benzylideneamino phenyl methanamine fragment, effectively hydrogen bonded to 2. Thermolysis of 2 or 2-PhCHNCH(NH2)Ph releases the HN═CHPh self-coupling products hydrobenzamide (A), N-benzylidine benzylamine (B), and benzonitrile (C). Under catalytic conditions, free HN═CHPh (cis/trans-HN═CHPh mixture) is produced using 2.5 mol % of 1 in 90% spectroscopic yield. These studies provide a clearer understanding for the conversion of the HN═CHPh in 2 or 2-PhCHNCH(NH2)Ph to the C-C and C-N coupled products. Reduction of 1-HN═CHPh with KC8 yields the reductively coupled benzylamide complex [K(OEt2)]2[(tBupyrpyrr2)2Fe2(μ2-NHCHPhCHPhNH)] (3) as the result of a new C-C bond formed between two radical benzylamide fragments.
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Affiliation(s)
- Ethan Zars
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Lisa Gravogl
- Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, Erlangen 91058, Germany
| | - Michael Gau
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J Carroll
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Karsten Meyer
- Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, Erlangen 91058, Germany
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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2
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Struble TJ, Lankswert HM, Pink M, Johnston JN. Enantioselective Organocatalytic Amine-Isocyanate Capture-Cyclization: Regioselective Alkene Iodoamination for the Synthesis of Chiral Cyclic Ureas. ACS Catal 2018; 8:11926-11931. [PMID: 31131150 DOI: 10.1021/acscatal.8b03708] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ureas of chiral diamines are prominent features of therapeutics, chiral auxiliaries, and intermediates in complex molecule synthesis. Although many methods for diamine synthesis are available, metal-free enantioselective alkene functionalizations to make protected 1,2- and 1,3-diamines from simple achiral starting materials are rare, and a single reagent that accesses a cross-section of each congener with high enantiomeric excess is not available. We describe a method to synthesize enantioenriched cyclic 5- and 6-membered ureas from allylic amines and an isocyanate using a C2-symmetric BisAmidine (BAM) catalyst that delivers N-selectivity from an ambident sulfonyl imide intermediate, overcoming electronic and steric deactivation at nitrogen. The geometry of 1,2-disubstituted alkenes is correlated to 5-exo and 6-endo cyclizations without altering alkene face selectivity, which is unexpectedly opposite that observed with O-nucleophiles. Straightforward product manipulations to diamine and imidazolidinone derivatives are underscored by the synthesis of an NK1 antagonist.
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Affiliation(s)
- Thomas J. Struble
- Department of Chemistry and Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235-1822, United States
| | - Hannah M. Lankswert
- Department of Chemistry and Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235-1822, United States
| | - Maren Pink
- Indiana University Molecular Structure Center, Bloomington, Indiana 47405, United States
| | - Jeffrey N. Johnston
- Department of Chemistry and Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235-1822, United States
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3
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Ando S, Ishizuka T. Diastereoselective Reductions with Zinc Powder in a Mixture of NaOH aq. and MeOH for Syntheses of (±)-1,2-Diarylethylenediamines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shin Ando
- Faculty of Life Sciences; Kumamoto University; 5-1 Oe-honmachi, Chuo-Ku Kumamoto 862-0973 Japan
| | - Tadao Ishizuka
- Faculty of Life Sciences; Kumamoto University; 5-1 Oe-honmachi, Chuo-Ku Kumamoto 862-0973 Japan
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Ahmad S, Shukla L, Szawkało J, Roszkowski P, Maurin JK, Czarnocki Z. Synthesis of novel chiral guanidine catalyst and its application in the asymmetric Pictet-Spengler reaction. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2016.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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5
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Allingham MT, Bennett EL, Davies DH, Harper PM, Howard-Jones A, Mehdar YT, Murphy PJ, Thomas DA, Caulkett PW, Potter D, Lam CM, O'Donoghue AC. Synthesis, applications and mechanistic investigations of C2 symmetric guanidinium salts. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Xue H, Jiang D, Jiang H, Kee CW, Hirao H, Nishimura T, Wong MW, Tan CH. Mechanistic Insights into Bicyclic Guanidine-Catalyzed Reactions from Microscopic and Macroscopic Perspectives. J Org Chem 2015; 80:5745-52. [DOI: 10.1021/acs.joc.5b00709] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hansong Xue
- Department
of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Danfeng Jiang
- Department
of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Huan Jiang
- Department
of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Choon Wee Kee
- Department
of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Hajime Hirao
- Department
of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Takahiro Nishimura
- Department
of Chemistry, Kyoto University, Sakyo-ku, Kyoto 6068502, Japan
| | - Ming Wah Wong
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Choon-Hong Tan
- Department
of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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7
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Shaikh M, Sahu M, Gavel PK, Ranganath KV. Ferrites catalyzed aerobic oxidation of benzoin and its extension to enantioselective version. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2015.01.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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8
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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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9
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Bandar JS, Barthelme AP, Mazori AY, Lambert TH. Structure-Activity Relationship Studies of Cyclopropenimines as Enantioselective Brønsted Base Catalysts. Chem Sci 2014; 6:1537-1547. [PMID: 26504512 PMCID: PMC4618405 DOI: 10.1039/c4sc02402h] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New insights aid in the understanding and design of cyclopropenimine-based asymmetric catalysts.
We recently demonstrated that chiral cyclopropenimines are viable Brønsted base catalysts in enantioselective Michael and Mannich reactions. Herein, we describe a series of structure–activity relationship studies that provide an enhanced understanding of the effectiveness of certain cyclopropenimines as enantioselective Brønsted base catalysts. These studies underscore the crucial importance of dicyclohexylamino substituents in mediating both reaction rate and enantioselectivity. In addition, an unusual catalyst CH···O interaction, which provides both ground state and transition state organization, is discussed. Cyclopropenimine stability studies have led to the identification of new catalysts with greatly improved stability. Finally, additional demonstrations of substrate scope and current limitations are provided herein.
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Affiliation(s)
- Jeffrey S Bandar
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, United States
| | - Alexandre P Barthelme
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, United States
| | - Alon Y Mazori
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, United States
| | - Tristan H Lambert
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, United States
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10
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Fukuzumi M, Nakanishi W, Ishikawa T, Kumamoto T. Synthesis ofortho-Phenylenebis(guanidine) Derivatives with Potential Chirality. Helv Chim Acta 2014. [DOI: 10.1002/hlca.201400053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Oxidation of benzoins to benzils in the presence of porphyrin sensitizers by air and sunlight or visible light. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-013-1130-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Ishikawa T, Heima T, Yoshida M, Kumamoto T. Catalytic Performance of Polystyrene-BoundChibaGDerivatives as Guanidine Organobases in AsymmetricMichaelAdditions. Helv Chim Acta 2014. [DOI: 10.1002/hlca.201300259] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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da Silva RC, da Silva GP, Sangi DP, Pontes JGDM, Ferreira AG, Corrêa AG, Paixão MW. 1,1-Diamino-2-nitroethylenes as excellent hydrogen bond donor organocatalysts in the Michael addition of carbon-based nucleophiles to β-nitrostyrenes. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.08.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Jacquemard U, Harpainter P, Roland S. Introduction of bulky tert-butyl substituents on the core of N,N′-diaryl N-heterocyclic carbenes through the corresponding vicinal diamines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.132] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Sheshenev AE, Boltukhina EV, White AJP, Hii KKM. Methylene-bridged bis(imidazoline)-derived 2-oxopyrimidinium salts as catalysts for asymmetric Michael reactions. Angew Chem Int Ed Engl 2013; 52:6988-91. [PMID: 23712675 PMCID: PMC3749446 DOI: 10.1002/anie.201300614] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 03/12/2013] [Indexed: 11/20/2022]
Affiliation(s)
- Andrey E Sheshenev
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, UK
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16
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Sheshenev AE, Boltukhina EV, White AJP, Hii KKM. Methylene-Bridged Bis(imidazoline)-Derived 2-Oxopyrimidinium Salts as Catalysts for Asymmetric Michael Reactions. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300614] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Dai Q, Huang H, Cong-Gui Zhao J. Highly Stereoselective Synthesis of Trisubstituted Cyclohexanols Using a Guanidine-Catalyzed Tandem Henry–Michael Reaction. J Org Chem 2013; 78:4153-7. [DOI: 10.1021/jo4001806] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Qipu Dai
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio,
Texas 78249-0698, United States
| | - Huicai Huang
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio,
Texas 78249-0698, United States
| | - John Cong-Gui Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio,
Texas 78249-0698, United States
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18
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Wang M, Wang CJ, Lin Z. Cu(I)/TF-BiphamPhos Catalyzed Reactions of Alkylidene Bisphosphates and Alkylidene Malonates with Azomethine Ylides: Michael Addition versus 1,3-Dipolar Cycloaddition. Organometallics 2012. [DOI: 10.1021/om300435s] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Meiyan Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s Republic of
China
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's
Republic of China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s Republic of
China
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19
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Cruz A, Padilla-Martínez II, García-Báez EV. A synthetic method to access symmetric and non-symmetric 2-(N,N'-disubstituted)guanidinebenzothiazoles. Molecules 2012; 17:10178-91. [PMID: 22922286 PMCID: PMC6268101 DOI: 10.3390/molecules170910178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 08/14/2012] [Accepted: 08/15/2012] [Indexed: 11/16/2022] Open
Abstract
Symmetric and non-symmetric 2-(N-H, N-methyl, N-ethylenyl and N-aryl)guanidinebenzothiazoles were synthesized from the reaction of ammonia, methylamine, pyrrolidine and aniline with dimethyl benzo[d]thiazol-2-yl-carbonodithioimidate as intermediate. The products were characterized by ¹H-, ¹³C-NMR spectroscopy and three of them by X-ray diffraction analysis. HN-phenyl protons formed intramolecular hydrogen bonds that assist the stereochemistry of the second substituent, whereas the HN-alkyl protons were involved in intermolecular hydrogen bonding.
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Affiliation(s)
- Alejandro Cruz
- Departamento de Ciencias Básicas de la Unidad Profesional Interdisciplinaria de Biotecnología del IPN, Av. Acueducto s/n, Barrio la Laguna Ticomán, México, D.F. 07340, Mexico.
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20
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Bandar JS, Lambert TH. Enantioselective Brønsted Base Catalysis with Chiral Cyclopropenimines. J Am Chem Soc 2012; 134:5552-5. [DOI: 10.1021/ja3015764] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jeffrey S. Bandar
- Department of Chemistry, Columbia University, New York, New York 10027, United
States
| | - Tristan H. Lambert
- Department of Chemistry, Columbia University, New York, New York 10027, United
States
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21
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Ishikawa T, Tokunou S, Nakanishi W, Kagawa N, Kumamoto T. Chiba-G-Catalyzed Intramolecular Oxo-Michael Addition: Synthetic Approaches to Vitamin E Skeleton. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)82] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Bhattacharya T, Sarma TK, Samanta S. Self-assembled monolayer coated gold-nanoparticle catalyzed aerobic oxidation of α-hydroxy ketones in water: an efficient one-pot synthesis of quinoxaline derivatives. Catal Sci Technol 2012. [DOI: 10.1039/c2cy20438j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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23
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Kawai H, Sugita Y, Tokunaga E, Sato H, Shiro M, Shibata N. Partially saturated fluorinated heterocycles: diastereo- and enantioselective synthesis of β-trifluoromethyl-pyrroline carboxylates. Chem Commun (Camb) 2012; 48:3632-4. [DOI: 10.1039/c2cc18052a] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Xue ZY, Li QH, Tao HY, Wang CJ. A Facile Cu(I)/TF-BiphamPhos-Catalyzed Asymmetric Approach to Unnatural α-Amino Acid Derivatives Containing gem-Bisphosphonates. J Am Chem Soc 2011; 133:11757-65. [DOI: 10.1021/ja2043563] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Yong Xue
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Qing-Hua Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Hai-Yan Tao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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25
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Ma T, Fu X, Kee CW, Zong L, Pan Y, Huang KW, Tan CH. Pentanidium-Catalyzed Enantioselective Phase-Transfer Conjugate Addition Reactions. J Am Chem Soc 2011; 133:2828-31. [DOI: 10.1021/ja1098353] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ting Ma
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Xiao Fu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Choon Wee Kee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Lili Zong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Yuanhang Pan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Kuo-Wei Huang
- KAUST Catalysis Center and Division of Chemicals and Life Sciences & Engineering, 4700 King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Choon-Hong Tan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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26
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Muthupandi P, Sekar G. Zinc-catalyzed aerobic oxidation of benzoins and its extension to enantioselective oxidation. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.12.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Terada M, Nii H. Highly Stereoselective [4+2] Cycloaddition of Azlactones to β,γ-Unsaturated α-Ketoesters Catalyzed by an Axially Chiral Guanidine Base. Chemistry 2011; 17:1760-3. [DOI: 10.1002/chem.201003015] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Indexed: 11/07/2022]
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28
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Huang D, Qin S, Hu C. Computational investigation on the mechanism and stereochemistry of guanidine-catalyzed enantioselective isomerization of 3-alkynoates to allenoates. Org Biomol Chem 2011; 9:6034-9. [DOI: 10.1039/c0ob01233e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Hua MQ, Wang L, Cui HF, Nie J, Zhang XL, Ma JA. A powerful synergistic effect for highly efficient diastereo- and enantioselective phase-transfer catalyzed conjugate additions. Chem Commun (Camb) 2011; 47:1631-3. [DOI: 10.1039/c0cc04321d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Fu X, Tan CH. Mechanistic considerations of guanidine-catalyzed reactions. Chem Commun (Camb) 2011; 47:8210-22. [DOI: 10.1039/c0cc03691a] [Citation(s) in RCA: 163] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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31
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Access to the nicotine system by application of a guanidine-catalyzed asymmetric Michael addition of diphenyliminoacetate with 3-pyridyl vinyl ketone. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.05.086] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Li Q, Ding CH, Hou XL, Dai LX. Diastereo- and Enantioselective Synthesis of α,γ-Diaminobutyric Acid Derivatives via Cu-Catalyzed Asymmetric Michael Reaction. Org Lett 2010; 12:1080-3. [DOI: 10.1021/ol100060t] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qing Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Chang-Hua Ding
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Xue-Long Hou
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Li-Xin Dai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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33
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34
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35
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Terada M, Tsushima D, Nakano M. Enantioselective Electrophilic Amination of α-Cyanothioacetates with Azodicarboxylates Catalyzed by an Axially Chiral Guanidine Base. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900594] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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36
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Genc M, Servi S. Microwave-Induced Synthesis of 2-Aminoimidazolines Under Neat Conditions. SYNTHETIC COMMUN 2009. [DOI: 10.1080/00397910902739896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Murat Genc
- a Department of Chemistry , Faculty of Science and Art, University of Adiyaman , Adiyaman, Turkey
| | - Süleyman Servi
- b Department of Chemistry , Faculty of Science and Art, University of Firat , Elazig, Turkey
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Abstract
Chiral guanidine catalysts share common characteristics such as high pK(a) values and dual hydrogen-bonding modes of activation, and high catalytic activities and enantioselectivities can often be achieved. The utilization of guanidines as catalysts has been growing at a steady pace. In the past few years, it has attracted tremendous attention through several landmark achievements. This article highlights the development of chiral guanidine catalysis in asymmetric synthesis.
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Affiliation(s)
- Dasheng Leow
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
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38
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Lygo B, Beynon C, Lumley C, McLeod MC, Wade CE. Co-catalyst enhancement of enantioselective PTC Michael additions involving glycine imines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.123] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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Enantioselective Henry (nitroaldol) reaction catalyzed by axially chiral guanidines. Bioorg Med Chem Lett 2009; 19:3895-8. [DOI: 10.1016/j.bmcl.2009.03.097] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 03/19/2009] [Accepted: 03/23/2009] [Indexed: 11/18/2022]
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40
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Yu Z, Liu X, Zhou L, Lin L, Feng X. Bifunctional Guanidine via an Amino Amide Skeleton for Asymmetric Michael Reactions of β-Ketoesters with Nitroolefins: A Concise Synthesis of Bicyclic β-Amino Acids. Angew Chem Int Ed Engl 2009; 48:5195-8. [DOI: 10.1002/anie.200901337] [Citation(s) in RCA: 157] [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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41
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Yu Z, Liu X, Zhou L, Lin L, Feng X. Bifunctional Guanidine via an Amino Amide Skeleton for Asymmetric Michael Reactions of β-Ketoesters with Nitroolefins: A Concise Synthesis of Bicyclic β-Amino Acids. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200901337] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Kano T, Kumano T, Maruoka K. Rate enhancement of phase transfer catalyzed conjugate additions by CsCl. Org Lett 2009; 11:2023-5. [PMID: 19348469 DOI: 10.1021/ol900476e] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A rate enhancement of phase transfer catalyzed conjugate additions was accomplished using a catalytic amount of CsCl. The utility of this method was demonstrated in the asymmetric synthesis of glutamic acid derivatives by using a chiral phase transfer catalyst.
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Affiliation(s)
- Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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43
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Pansare SV, Lingampally R. Synthesis and evaluation of guanidinyl pyrrolidines as bifunctional catalysts for enantioselective conjugate additions to cyclic enones. Org Biomol Chem 2009; 7:319-24. [DOI: 10.1039/b812038b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Zheng YS, Ran SY, Hu YJ, Liu XX. Enantioselective self-assembly of chiral calix[4]arene acid with amines. Chem Commun (Camb) 2009:1121-3. [DOI: 10.1039/b817974c] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Miyabe H, Yoshida K, Reddy VK, Takemoto Y. Palladium- or Iridium-Catalyzed Allylic Substitution of Guanidines: Convenient and Direct Modification of Guanidines. J Org Chem 2008; 74:305-11. [DOI: 10.1021/jo802271d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hideto Miyabe
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan, and School of Pharmacy, Hyogo University of Health Sciences, Minatojima, Chuo-ku, Kobe 650-8530, Japan
| | - Kazumasa Yoshida
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan, and School of Pharmacy, Hyogo University of Health Sciences, Minatojima, Chuo-ku, Kobe 650-8530, Japan
| | - Valluru Krishna Reddy
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan, and School of Pharmacy, Hyogo University of Health Sciences, Minatojima, Chuo-ku, Kobe 650-8530, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan, and School of Pharmacy, Hyogo University of Health Sciences, Minatojima, Chuo-ku, Kobe 650-8530, Japan
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Huang X, Chen X, Chen Y, Zhang A, Li X. A domino reaction of a β-ketoester, phenylethylamine and ethyl glyoxylate: leading to chiral tricarboxylate containing multiple stereocenters. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Kim H, Nguyen Y, Yen CPH, Chagal L, Lough AJ, Kim BM, Chin J. Stereospecific synthesis of C2 symmetric diamines from the mother diamine by resonance-assisted hydrogen-bond directed diaza-Cope rearrangement. J Am Chem Soc 2008; 130:12184-91. [PMID: 18700769 DOI: 10.1021/ja803951u] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Sixteen diphenylethylenediamine analogues including those with electron donating, electron withdrawing, and sterically bulky substituents have been prepared in good overall yields (70-90%) and in enantiomerically pure form (>99% ee) by diaza-Cope rearrangement reaction. A single chiral mother diamine, ((R,R)-1,2-bis-(2-hydroxyphenyl)-1,2-diaminoethane), is reacted with appropriate aldehydes to form the initial diimines that rearrange to give all the product diimines in the (S,S) form. The daughter diamines are obtained by hydrolysis of the product diimines. Density functional theory computation shows that resonance-assisted hydrogen-bond is the main driving force behind all the rearrangement reactions. Chiral high performance liquid chromatography and circular dichroism spectroscopy show that the highly stereospecific rearrangement reactions take place with apparent inversion of stereochemistry.
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Affiliation(s)
- Hyunwoo Kim
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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48
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Saito N, Ryoda A, Nakanishi W, Kumamoto T, Ishikawa T. Guanidine-Catalyzed Asymmetric Synthesis of 2,2-Disubstituted Chromane Skeletons by Intramolecular Oxa-Michael Addition. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800089] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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