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Zhou Z, Yang J, Yang B, Han Y, Zhu L, Xue XS, Zhu F. Photoredox Nickel-Catalysed Stille Cross-Coupling Reactions. Angew Chem Int Ed Engl 2023; 62:e202314832. [PMID: 37946607 DOI: 10.1002/anie.202314832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/06/2023] [Accepted: 11/09/2023] [Indexed: 11/12/2023]
Abstract
The Stille cross-coupling reaction is one of the most common strategies for the construction of C-C bonds. Despite notable strides in the advancement of the Stille reaction, persistent challenges persist in hindering its greener evolution. These challenges encompass multiple facets, such as the high cost of precious metals and ligands, the demand for various additives, and the slow reaction rate. In comparison to the dominant palladium-catalysed Stille reactions, cost-effective nickel-catalysed systems lag behind, and enantioconvergent Stille reactions of racemic stannanes remain undeveloped. Herein, we present a pioneering instance of nickel-catalysed enantioconvergent Stille cross-coupling reactions of racemic stannane reagents, resulting in the formation of C-C bonds in good to high yields with excellent stereoselectivity. This strategy provides a practical, scalable, and operationally straightforward method for the synthesis of C(sp3 )-C(sp3 ), C(sp3 )-C(sp2 ), and C(sp3 )-C(sp) bonds under exceptionally mild conditions (without additives and bases, ambient temperature). The innovative use of synergistic photoredox/nickel catalysis enables a novel single-electron transmetalation process of stannane reagents, providing a new research paradigm of Stille reactions.
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Affiliation(s)
- Zhenghong Zhou
- Frontiers Science Center for Transformative Molecules (FSCTM), Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Jimin Yang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai, 200032, P. R. China
| | - Bo Yang
- Frontiers Science Center for Transformative Molecules (FSCTM), Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Yang Han
- Frontiers Science Center for Transformative Molecules (FSCTM), Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Lijuan Zhu
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, P. R. China
| | - Xiao-Song Xue
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai, 200032, P. R. China
| | - Feng Zhu
- Frontiers Science Center for Transformative Molecules (FSCTM), Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
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2
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Glowacki-Pallach B, Lutter M, Schollmeyer D, Hiller W, Jouikov V, Jurkschat K. Extending Chirality in Group XIV Metallatranes. Inorg Chem 2023; 62:7662-7680. [PMID: 37156016 DOI: 10.1021/acs.inorgchem.2c04242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The syntheses of the racemic amino alcohol rac-N(CH2CMe2OH)(CMe2CH2OH)(CH2CHMeOH) (L22'1*H3, 2) and its representative N(CH2CMe2OH)(CMe2CH2OH)(CH2C(R)HMeOH) (L22'1RH3, 3) with the stereogenic carbon center being R-configured are reported. Also reported are the stannatranes L22'1*SnOt-Bu (4) L22'1RSnOt-Bu (6) and germatranes L22'1*GeOEt (5) and L22'1RGeOEt (7) as well as the trinuclear tin oxocluster [(μ3-O)(μ3-O-t-Bu){SnL22'1R}3] (8). NMR and IR spectroscopy, electrospray ionization mass spectrometry (ESI MS), and single crystal X-ray diffraction analysis characterize these compounds. Computational studies accompany the experimental work and help understand the diastereoselectivity observed in the course of the metallatrane syntheses.
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Affiliation(s)
- Britta Glowacki-Pallach
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Michael Lutter
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Dieter Schollmeyer
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - Wolf Hiller
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, 44221 Dortmund, Germany
| | | | - Klaus Jurkschat
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, 44221 Dortmund, Germany
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3
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Pan X, Talavera M, Braun T. Efficient hydrostannation of fluorinated alkenes. J Fluor Chem 2023. [DOI: 10.1016/j.jfluchem.2023.110116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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4
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Polydentate P, N-based ligands for palladium-catalyzed cross-coupling reactions. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Synthesis of Novel Key Chromophoric Intermediates via C-C Coupling Reactions. Catalysts 2022. [DOI: 10.3390/catal12101292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The fundamentals of Pd-catalyzed Csp2−Csp2 Miyaura borylation, Suzuki cross-coupling, and Stille cross-coupling reactions for a variety of borylated precursors based on phenothiazine (PTZ), phenoxazine (POZ), carbazole (Cz), and quinoxaline (QX) units have been explored. Three palladium-based catalysts were chosen for this study: Pd(PPh3)4, Pd(PPh3)2Cl2, and Pd(dppf)Cl2, applying different reaction conditions. Around 16 desired chromophores were successfully designed and synthesized using C-C cross-coupling reactions in moderate to excellent yields, including PTZ, POZ, and Cz units coupled with QX, indolinium iodide, thienyl, phenyl, or triphenylamine moieties. Additionally, PTZ, POZ, and Cz have been employed in synthesizing various pinacol boronate ester derivatives in good to moderate yields. Interestingly, Pd(dppf)Cl2 was found to be the best catalyst for borylation, and C-C cross-coupling reactions occurred in as little as 30 min, with an excellent yield exceeding 98%. Pd(PPh3)4 and Pd(PPh3)2Cl2 catalyzed the reaction to obtain the desired products in moderate to good yields after a long time (20–24 h). On the other hand, the Suzuki-Miyaura cross-coupling between N-(2-methyl)hexyl carbazole pinacol boronate ester derivative 10c and three halogenated quinoxaline derivatives—4-(3-(5-bromothiophen-2-yl)quinoxalin-2-yl)benzaldehyde (27), 4-(5-(3-(5-bromothiophen-2-yl)quinoxalin-2-yl)thiophen-2-yl)benzaldehyde (30), and 4-(3-chloroquinoxalin-2-yl)benzaldehyde (25) catalyzed by Pd(PPh3)4—afforded three carbazole-quinoxaline chromophores (28, 30, and 31, respectively) in 2–3 h, with good to excellent yields reaching 86%. The electron-deficient QX couplers proved to be coupled efficiently using the Stille coupling reaction, which involves the coupling between electron-rich orgaostannane and electron-deficient halide. The synthesized precursors and desired chromophores were characterized by FTIR, 1H-NMR, 13C-NMR, and HRMS.
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6
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Shimada S, Yin SF, Choe YK. Synthesis, structure and properties of trivalent and pentavalent tricarbabismatranes. Chem Commun (Camb) 2022; 58:6614-6617. [PMID: 35583950 DOI: 10.1039/d2cc00751g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first trivalent and pentavalent tricarbabismatranes were synthesized by the reaction of N(CH2{2-LiC6H4})3 with BiCl3 and subsequent reaction with XeF2, respectively. The trivalent bismatrane was easily oxidized by air, while the pentavalent bismatrane difluoride was relatively stable to air. A similar pentavalent bismatrance dichloride was prone to C-Cl bond reductive elimination even at room temperature.
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Affiliation(s)
- Shigeru Shimada
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.
| | - Shuang-Feng Yin
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.
| | - Yoong-Kee Choe
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.
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7
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Miele M, Castoldi L, Simeone X, Holzer W, Pace V. Straightforward synthesis of bench-stable heteroatom-centered difluoromethylated entities via controlled nucleophilic transfer from activated TMSCHF 2. Chem Commun (Camb) 2022; 58:5761-5764. [PMID: 35450981 DOI: 10.1039/d2cc00886f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The commercially available and experimentally convenient (bp 65 °C) difluoromethyltrimethylsilane (TMSCHF2) is proposed as a valuable difluoromethylating transfer reagent for delivering the CHF2 moiety to various heteroatom-based electrophiles. Upon activation with an alkoxide, a conceptually intuitive nucleophilic displacement directly furnishes in high yields the bench-stable analogues.
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Affiliation(s)
- Margherita Miele
- University of Vienna - Department of Pharmaceutical Chemistry, Althanstrasse, 14 1090 Vienna, Austria.
| | - Laura Castoldi
- University of Milano - Department of Pharmaceutical Sciences, Via Golgi 19, 20133 Milano, Italy
| | - Xenia Simeone
- University of Vienna - Department of Pharmaceutical Chemistry, Althanstrasse, 14 1090 Vienna, Austria.
| | - Wolfgang Holzer
- University of Vienna - Department of Pharmaceutical Chemistry, Althanstrasse, 14 1090 Vienna, Austria.
| | - Vittorio Pace
- University of Vienna - Department of Pharmaceutical Chemistry, Althanstrasse, 14 1090 Vienna, Austria. .,University of Torino - Department of Chemistry, Via Giuria 7, 10125 Torino, Italy
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8
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Zhu F, Powell WC, Jing R, Walczak MA. Organometallic Ala M Reagents for Umpolung Peptide Diversification. CHEM CATALYSIS 2021; 1:870-884. [PMID: 34738092 PMCID: PMC8562471 DOI: 10.1016/j.checat.2021.05.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Selective modifications of peptides and proteins have emerged as a promising strategy to develop novel mechanistic probes and prepare compounds with translational potentials. Here, we report alanine carbastannatranes AlaSn as a universal synthon in various C-C and C-heteroatom bond-forming reactions. These reagents are compatible with peptide manipulation techniques and can undergo chemoselective conjugation in minutes when promoted by Pd(0). Despite their increased nucleophilicity and propensity to transfer the alkyl group, C(sp3)-C(sp2) coupling with AlaSn can be accomplished at room temperature under buffered conditions (pH 6.5-8.5). We also show that AlaSn can be easily transformed into several canonical L- and D-amino acids in arylation, acylation, and etherification reactions. Furthermore, AlaSn can partake in macrocyclizations exemplified by the synthesis of medium size cyclic peptides with various topologies. Taken together, metalated alanine AlaSn demonstrates unparalleled scope and represents a new type of umpolung reagents suitable for structure-activity relationship studies and peptide diversification.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, CO 80309, United States
- Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. C
- These authors contributed equally
| | - Wyatt C. Powell
- Department of Chemistry, University of Colorado, Boulder, CO 80309, United States
- These authors contributed equally
| | - Ruiheng Jing
- Department of Chemistry, University of Colorado, Boulder, CO 80309, United States
| | - Maciej A. Walczak
- Department of Chemistry, University of Colorado, Boulder, CO 80309, United States
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9
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Srivastav N, Kumar K, Singh R, Kaur V. Tricyclic tin( iv) cages: synthetic aspects and intriguing features of stannatranes and pseudostannatranes. NEW J CHEM 2020. [DOI: 10.1039/c9nj05519c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This perspective summarizes various synthetic routes of stannatranes and pseudostannatranes along with their interesting features, such as appearance of satellites in their NMR spectra, cluster formation upon hydrolysis and exchange reactions.
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Affiliation(s)
- Neha Srivastav
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Keshav Kumar
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Raghubir Singh
- Department of Chemistry
- DAV College
- Chandigarh-160011
- India
| | - Varinder Kaur
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
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10
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Ralph G, Biscoe MR. Preparation of Enantioenriched Alkylcarbastannatranes via Nucleophilic Inversion of Alkyl Mesylates for Use in Stereospecific Cross-Coupling Reactions. Organometallics 2019; 38:3912-3915. [PMID: 33824546 DOI: 10.1021/acs.organomet.9b00467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the preparation of enantioenriched secondary alkylcarbastannatranes via a stereoinvertive SN2 reaction of enantioenriched alkyl mesylates and carbastannatranyl anion equivalents. Using this process, enantioenriched secondary alcohols may be converted into highly enantioenriched alkylcarbastannatranes, which are useful in stereospecific cross-coupling reactions.
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Affiliation(s)
- Glenn Ralph
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States.,Ph.D. Program in Chemistry, The Graduate Center of The City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
| | - Mark R Biscoe
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States.,Ph.D. Program in Chemistry, The Graduate Center of The City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
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11
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Singh N, Kumar K, Srivastav N, Singh R, Kaur V, Jasinski JP, Butcher RJ. Exploration of fluorescent organotin compounds of α-amino acid Schiff bases for the detection of organophosphorous chemical warfare agents: quantification of diethylchlorophosphate. NEW J CHEM 2018. [DOI: 10.1039/c8nj01153b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fluorescent Schiff base organotin probes for the detection of chemical warfare agents.
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Affiliation(s)
- Navjot Singh
- Department of Chemistry, Panjab University
- Chandigarh-160014
- India
| | - Keshav Kumar
- Department of Chemistry, Panjab University
- Chandigarh-160014
- India
| | - Neha Srivastav
- Department of Chemistry, Panjab University
- Chandigarh-160014
- India
| | - Raghubir Singh
- Department of Chemistry, DAV College
- Chandigarh-160011
- India
| | - Varinder Kaur
- Department of Chemistry, Panjab University
- Chandigarh-160014
- India
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12
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Roy D, Uozumi Y. Recent Advances in Palladium-Catalyzed Cross-Coupling Reactions at ppm to ppb Molar Catalyst Loadings. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700810] [Citation(s) in RCA: 185] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- David Roy
- Institute for Molecular Science; Myodaiji; Okazaki 444-8787 Japan
| | - Yasuhiro Uozumi
- Institute for Molecular Science; Myodaiji; Okazaki 444-8787 Japan
- Green Nanocatalysis Research Team; RIKEN Center for Sustainable Resource Science; Wako 351-0198 Japan
- JST-ACCEL; Myodaiji; Okazaki 444-8787 Japan
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13
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Ma X, Diane M, Ralph G, Chen C, Biscoe MR. Stereospecific Electrophilic Fluorination of Alkylcarbastannatrane Reagents. Angew Chem Int Ed Engl 2017; 56:12663-12667. [PMID: 28833888 DOI: 10.1002/anie.201704672] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 08/08/2017] [Indexed: 01/07/2023]
Abstract
We report the use of isolable primary and secondary alkylcarbastannatrane nucleophiles in site-specific fluorination reactions. These reactions occur without the need for transition metal catalysis or in situ activation of the nucleophile. In the absence of the carbastannatrane backbone, alkyltin nucleophiles exhibit no activity towards fluorination. When enantioenriched alkylcarbastannatranes are employed, fluorination occurs predominately via a stereoinvertive mechanism to generate highly enantioenriched alkyl fluoride compounds. These conditions can also be extended to stereospecific chlorination, bromination, and iodination reactions.
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Affiliation(s)
- Xinghua Ma
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA.,The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
| | - Mohamed Diane
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
| | - Glenn Ralph
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA.,The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
| | - Christine Chen
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
| | - Mark R Biscoe
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA.,The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
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14
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Ma X, Diane M, Ralph G, Chen C, Biscoe MR. Stereospecific Electrophilic Fluorination of Alkylcarbastannatrane Reagents. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704672] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Xinghua Ma
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Mohamed Diane
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
| | - Glenn Ralph
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Christine Chen
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
| | - Mark R. Biscoe
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
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15
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Srivastav N, Singh R, Kaur V, Wagler J, Kroke E. A stannatrane-like [4.4.4.0 1,6 ] heterotricyclic stannate anion possessing rhodanide antennae: A chromoreactand for Fe 3+ , Cu 2+ and Co 2+ ions. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.04.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Wang CY, Ralph G, Derosa J, Biscoe MR. Stereospecific Palladium-Catalyzed Acylation of Enantioenriched Alkylcarbastannatranes: A General Alternative to Asymmetric Enolate Reactions. Angew Chem Int Ed Engl 2017; 56:856-860. [PMID: 27981696 PMCID: PMC6078499 DOI: 10.1002/anie.201609930] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Indexed: 11/07/2022]
Abstract
We report the development of a Pd-catalyzed process for the cross coupling of unactivated primary, secondary, and tertiary alkylcarbastannatrane nucleophiles with acyl electrophiles. Reactions involving optically active alkylcarbastannatranes occur with exceptional stereofidelity and with net retention of absolute configuration. Because the stereochemistry of the resulting products is entirely reagent-controlled, this process may be viewed as a general, alternative approach to the preparation of products typically accessed via asymmetric enolate methodologies. Additionally, we report a new method for the preparation of optically active alkylcarbastannatranes, which should facilitate their future use in stereospecific reactions.
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Affiliation(s)
- Chao-Yuan Wang
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
- The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
| | - Glenn Ralph
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
- The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
| | - Joseph Derosa
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
| | - Mark R Biscoe
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
- The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
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17
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Wang C, Ralph G, Derosa J, Biscoe MR. Stereospecific Palladium‐Catalyzed Acylation of Enantioenriched Alkylcarbastannatranes: A General Alternative to Asymmetric Enolate Reactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609930] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chao‐Yuan Wang
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Glenn Ralph
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Joseph Derosa
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
| | - Mark R. Biscoe
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
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18
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Fillion E, Kavoosi A, Nguyen K, Ieritano C. B(C 6F 5) 3-Catalyzed transfer 1,4-hydrostannylation of α,β-unsaturated carbonyls using iPr-tricarbastannatrane. Chem Commun (Camb) 2016; 52:12813-12816. [PMID: 27731869 DOI: 10.1039/c6cc07819b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Tris(pentafluorophenyl)borane, B(C6F5)3, has been found to be an effective catalyst to access the hydridoborate anion, [N(CH2CH2CH2)3Sn][HB(C6F5)3], via hydride abstraction from the hypercoordinated tin reagent, iPr-tricarbastannatrane. This process has been applied to the B(C6F5)3-catalyzed transfer 1,4-hydrostannylation of electron-deficient olefins, namely benzylidene barbituric acids. Insights into the mechanism have been obtained via a series of 1H, 2H, 11B, 13C, and 119Sn NMR spectroscopy, mass spectrometry, and labeling experiments.
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Affiliation(s)
- Eric Fillion
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON N2L 3G1, Canada.
| | - Azadeh Kavoosi
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON N2L 3G1, Canada.
| | - Kevin Nguyen
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON N2L 3G1, Canada.
| | - Christian Ieritano
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON N2L 3G1, Canada.
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19
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Srivastav N, Mutneja R, Singh N, Singh R, Kaur V, Wagler J, Kroke E. Diverse Molecular Architectures of Si and Sn [4.4.3.0
1,6
]Tridecane Cages Derived from a Mannich Base Possessing Semi‐Rigid Unsymmetrical Podands. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Neha Srivastav
- Department of chemistry, Panjab University, Sector 14, Chandigarh 160014, India, http://chemistry.puchd.ac.in/show‐biodata.php?qstrempid=5532&qstrempdesigcode=10
| | - Ruchi Mutneja
- Department of chemistry, Panjab University, Sector 14, Chandigarh 160014, India, http://chemistry.puchd.ac.in/show‐biodata.php?qstrempid=5532&qstrempdesigcode=10
| | - Navjot Singh
- Department of chemistry, Panjab University, Sector 14, Chandigarh 160014, India, http://chemistry.puchd.ac.in/show‐biodata.php?qstrempid=5532&qstrempdesigcode=10
| | - Raghubir Singh
- Department of chemistry, DAV College, Sector 10, Chandigarh 160011, India, http://www.davchd.com
| | - Varinder Kaur
- Department of chemistry, Panjab University, Sector 14, Chandigarh 160014, India, http://chemistry.puchd.ac.in/show‐biodata.php?qstrempid=5532&qstrempdesigcode=10
| | - Jörg Wagler
- Institut für Anorganische Chemie, Technische Universität Bergakademie, Freiberg 09596 Freiberg, Germany
| | - Edwin Kroke
- Institut für Anorganische Chemie, Technische Universität Bergakademie, Freiberg 09596 Freiberg, Germany
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