1
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Binayeva M, Ma X, Ghaemimohammadi P, Biscoe MR. A general approach to stereospecific Pd-catalyzed cross-coupling reactions of benzylic stereocenters. Chem Sci 2023; 14:14124-14130. [PMID: 38098708 PMCID: PMC10717501 DOI: 10.1039/d3sc04519f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 11/15/2023] [Indexed: 12/17/2023] Open
Abstract
We have developed a general process for the formation of enantioenriched benzylic stereocenters via stereospecific Pd-catalyzed cross-coupling reactions of enantioenriched benzylic tricyclohexyltin nucleophiles. This process proceeds with excellent stereospecificity for a remarkably broad scope of electrophilic coupling partners including aryl and heteroaryl halides and triflates, acid chlorides, thioesters, chloroformates, and carbamoyl chlorides. Thus, enantioenriched 1,1-diarylalkanes as well as formal products of asymmetric enolate arylation are readily accessed using this approach. We additionally provide the first demonstration of a Sn-selective cross-coupling reaction using a vicinal alkylborylstannane nucleophile. In these reactions, the presence of cyclohexyl spectator ligands on tin is essential to ensure selective transfer of the secondary benzylic unit from tin to palladium.
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Affiliation(s)
- Meruyert Binayeva
- Department of Chemistry and Biochemistry, The City College of New York (CCNY) New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Xinghua Ma
- Department of Chemistry and Biochemistry, The City College of New York (CCNY) New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Pejman Ghaemimohammadi
- Department of Chemistry and Biochemistry, The City College of New York (CCNY) New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Mark R Biscoe
- Department of Chemistry and Biochemistry, The City College of New York (CCNY) 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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2
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Kirupakaran S, Arago G, Hirschhäuser C. A unified strategy for the synthesis of aldohexoses by boronate assisted assembly of CH 2X 2 derived C 1-building blocks. Chem Sci 2023; 14:9838-9842. [PMID: 37736647 PMCID: PMC10510816 DOI: 10.1039/d3sc03778a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 08/12/2023] [Indexed: 09/23/2023] Open
Abstract
A synthetic strategy for all aldohexoses with individually addressable protecting groups from dihalomethane C1-units is reported. The underlying synthesis of C6-sugar alcohols relies on three consecutive Matteson sequences, vinylation and bishydroxylation. Erythro and threo isomers have been realized for every glycol motif by strategic variation of the sequence.
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Affiliation(s)
| | - Glib Arago
- University of Duisburg-Essen Universitätsstr. 5-7 45117 Essen Germany
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3
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Braire J, Macé A, Zaier R, Cordier M, Vidal J, Lalli C, Martel A, Carreaux F. Catalytic Enantioselective Allylboration and Related Reactions of Isatins Promoted by Chiral BINOLs: Scope and Mechanistic Studies. J Org Chem 2023; 88:1469-1492. [PMID: 36690446 DOI: 10.1021/acs.joc.2c02476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An improvement in the catalytic enantioselective allylboration of isatins with 2-allyl-1,3,2-dioxaborolane in the presence of chiral BINOL derivatives is reported, offering an efficient one-step access to enantioenriched N-unprotected 3-allyl-3-hydroxy-2-oxindoles. This catalytic process is also effective for the crotylboration reaction with enantiomeric ratios (er) up to 97:3, as well as for the asymmetric synthesis of homopropargylic alcohols via an allenyl addition to indoline-2,3-diones. Origins of the high enantioselectivity in chiral BINOL-catalyzed allylboration of isatins were examined by DFT calculations. A hypothetical scenario suggested a crucial internal hydrogen bonding between the amide group (C═O···H-O) and the ethylene hydroxyl of the transient chiral mixed boronate ester, generating a rigid and stabilized system that favors the addition of the allylboron species to the Re face of the ketone function. The key role of the alcohol additive (t-BuOH or t-AmOH) in the enantioselective allylboration reaction of isatins has also been shown on the basis of a kinetics study and computational calculations by favoring the transesterification of the 2-allyl-1,3,2-dioxaborolane with BINOL via proton transfer processes.
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Affiliation(s)
- Julien Braire
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Aurélie Macé
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Rania Zaier
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, Avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - Marie Cordier
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Joëlle Vidal
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Claudia Lalli
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Arnaud Martel
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, Avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - François Carreaux
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
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4
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Yoo K, Fabig S, Grätz S, Borchardt L. The impact of the physical state and the reaction phase in the direct mechanocatalytic Suzuki-Miyaura coupling reaction. Faraday Discuss 2023; 241:206-216. [PMID: 36200472 DOI: 10.1039/d2fd00100d] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The direct mechanocatalytic Suzuki-Miyaura coupling reaction, utilizing palladium milling balls as active catalysts, was investigated regarding the physical state of the reagents and the reaction phase. The substitution patterns and functional groups of different aryl iodides were varied and different boronic acid derivates were utilized to achieve a wide range of substrate combinations. In the neat grinding experiments, liquid aryl iodides were more reactive than solid ones and a steric influence of the substituents, especially pronounced in ortho compounds, was observed. In order to overcome the general low reactivity of the solid phase, several liquid-assisted grinding experiments were conducted and the influence of substrate solubility and catalyst wettability analyzed. Among all LAG additives, EtOH showed the greatest impact on the reactivity, as it converts boronic acid derivatives into liquid and reactive esters under mechanochemical conditions, significantly speeding up the reaction.
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Affiliation(s)
- Kwangho Yoo
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
| | - Sven Fabig
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
| | - Sven Grätz
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
| | - Lars Borchardt
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
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5
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C. STOCKERT JUAN, A. ROMERO SILVINA, N. FELIX-POZZI MARCELO, BL罿QUEZ-CASTRO ALFONSO. In vivo polymerization of the dopamine-borate melanin precursor: A proof-of-concept regarding boron neutron-capture therapy for melanoma. BIOCELL 2023. [DOI: 10.32604/biocell.2023.026631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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6
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7
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Kilic A, Patlak B, Aydemir M, Durap F. Preparation of catechol boronate esters enabled by N → B dative bond as efficient, stable, and green catalysts for the transfer hydrogenation of various ketones. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Pérez-García RM, Riss PJ. Mild, Organo-Catalysed Borono-Deamination as a Key to Late-Stage Pharmaceutical Precursors and 18F-Labelled Radiotracers. Front Chem 2022; 10:884478. [PMID: 35559222 PMCID: PMC9089349 DOI: 10.3389/fchem.2022.884478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 03/17/2022] [Indexed: 11/13/2022] Open
Abstract
A tris(pentafluorophenyl)borane catalysed method for the synthesis of boronic acid esters from aromatic amines in yields of up to 93% was devised. Mild conditions, benign reagents, short reaction times, low temperatures and a wide substrate scope characterize the method. The reaction was found applicable to the synthesis of boronic acid ester derivatives of complex drug molecules in up to 86% isolated yield and high purity suitable for labelling. These boronates were subsequently labelled with [18F]fluoride ion in radiochemical yields of up to 55% with and even without isolation of the boronate-intermediate.
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Affiliation(s)
- Raúl M. Pérez-García
- Section of Organic Chemistry, Department of Chemistry, University of Oslo, Oslo, Norway
| | - Patrick J. Riss
- Section of Organic Chemistry, Department of Chemistry, University of Oslo, Oslo, Norway
- Division of Clinical Neuroscience, Oslo University Hospitals HF, Oslo, Norway
- GIGA Cyclotron Research Centre, Department of Chemistry, Liège, Belgium
- Department of Chemistry, Johannes Gutenberg-University, Mainz, Germany
- *Correspondence: Patrick J. Riss,
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9
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Park H, Lee J, Hwang SH, Kim D, Hong SH, Choi TL. Modulating the Rate of Controlled Suzuki–Miyaura Catalyst-Transfer Polymerization by Boronate Tuning. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00047] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyunwoo Park
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Jaeho Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Soon-Hyeok Hwang
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Daeun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Soon Hyeok Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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10
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Abstract
In dynamic materials, the reversible condensation between boronic acids and diols provides adaptability, self-healing ability, and responsiveness to small molecules and pH. The thermodynamics and kinetics of bond exchange determine the mechanical properties of dynamic polymer networks. Here, we investigate the effects of diol structure and salt additives on the rate of boronic acid-diol bond exchange, binding affinity, and the mechanical properties of the corresponding polymer networks. We find that proximal amides used to conjugate diols to polymers and buffering anions induce significant rate acceleration, consistent with an internal and external catalysis, respectively. This rate acceleration is reflected in the stress relaxation of the gels. These findings contribute to the fundamental understanding of the boronic ester dynamic bond and offer molecular strategies to tune the macromolecular properties of dynamic materials.
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Affiliation(s)
- Boyeong Kang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Julia A. Kalow
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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11
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Saed M, Gablier A, Terentjev EM. Exchangeable Liquid Crystalline Elastomers and Their Applications. Chem Rev 2022; 122:4927-4945. [PMID: 33596647 PMCID: PMC8915166 DOI: 10.1021/acs.chemrev.0c01057] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Indexed: 12/30/2022]
Abstract
This Review presents and discusses the current state of the art in "exchangeable liquid crystalline elastomers", that is, LCE materials utilizing dynamically cross-linked networks capable of reprocessing, reprogramming, and recycling. The focus here is on the chemistry and the specific reaction mechanisms that enable the dynamic bond exchange, of which there is a variety. We compare and contrast these different chemical mechanisms and the key properties of their resulting elastomers. In the conclusion, we discuss the most promising applications that are enabled by dynamic cross-linking and present a summary table: a library of currently available materials and their main characteristics.
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Affiliation(s)
- Mohand
O. Saed
- Cavendish Laboratory, University
of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Alexandra Gablier
- Cavendish Laboratory, University
of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, U.K.
| | - Eugene M. Terentjev
- Cavendish Laboratory, University
of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, U.K.
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12
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Boronic Acid Esters and Anhydrates as Dynamic Cross-Links in Vitrimers. Polymers (Basel) 2022; 14:polym14040842. [PMID: 35215755 PMCID: PMC8962972 DOI: 10.3390/polym14040842] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 12/02/2022] Open
Abstract
Growing environmental awareness imposes on polymer scientists the development of novel materials that show a longer lifetime and that can be easily recycled. These challenges were largely met by vitrimers, a new class of polymers that merges properties of thermoplastics and thermosets. This is achieved by the incorporation of dynamic covalent bonds into the polymer structure, which provides high stability at the service temperature, but enables the processing at elevated temperatures. Numerous types of dynamic covalent bonds have been utilized for the synthesis of vitrimers. Amongst them, boronic acid-based linkages, namely boronic acid esters and boroxines, are distinguished by their quick exchange kinetics and the possibility of easy application in various polymer systems, from commercial thermoplastics to low molecular weight thermosetting resins. This review covers the development of dynamic cross-links. This review is aimed at providing the state of the art in the utilization of boronic species for the synthesis of covalent adaptable networks. We mainly focus on the synthetic aspects of boronic linkages-based vitrimers construction. Finally, the challenges and future perspectives are provided.
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13
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Lyu Z, Sun S, Wu T. Highly stretchable covalent adaptive networks enabled by dynamic boronic diester linkages with nitrogen→boron coordination. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zhenyu Lyu
- Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials Science and Engineering, Sun Yat‐sen University Guangzhou China
| | - Shiqi Sun
- Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials Science and Engineering, Sun Yat‐sen University Guangzhou China
| | - Tongfei Wu
- Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials Science and Engineering, Sun Yat‐sen University Guangzhou China
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14
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Hamzehpoor E, Jonderian A, McCalla E, Perepichka DF. Synthesis of Boroxine and Dioxaborole Covalent Organic Frameworks via Transesterification and Metathesis of Pinacol Boronates. J Am Chem Soc 2021; 143:13274-13280. [PMID: 34428908 DOI: 10.1021/jacs.1c05987] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Boroxine and dioxaborole are the first and some of the most studied synthons of covalent organic frameworks (COFs). Despite their wide application in the design of functional COFs over the last 15 years, their synthesis still relies on the original Yaghi's condensation of boronic acids (with itself or with polyfunctional catechols), some of which are difficult to prepare, poorly soluble, or unstable in the presence of water. Here, we propose a new synthetic approach to boroxine COFs (on the basis of the transesterification of pinacol aryl boronates (aryl-Bpins) with methyl boronic acid (MBA) and dioxaborole COFs (through the metathesis of pinacol boronates with MBA-protected catechols). The aryl-Bpin and MBA-protected catechols are easy to purify, highly soluble, and bench-stable. Furthermore, the kinetic analysis of the two model reactions reveals high reversibility (Keq ∼ 1) and facile control over the equilibrium. Unlike the conventional condensation, which forms water as a byproduct, the byproduct of the metathesis (MBA pinacolate) allows for easy kinetic measurements of the COF formation by conventional 1H NMR. We show the generality of this approach by the synthesis of seven known boroxine/dioxaborole COFs whose crystallinity is better or equal to those reported by conventional condensation. We also apply metathesis polymerization to obtain two new COFs, Py4THB and B2HHTP, whose synthesis was previously precluded by the insolubility and hydrolytic instability, respectively, of the boronic acid precursors.
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Affiliation(s)
- Ehsan Hamzehpoor
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Antranik Jonderian
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Eric McCalla
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
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15
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Drożdż W, Walczak A, Stefankiewicz AR. Simultaneous Formation of a Fully Organic Triply Dynamic Combinatorial Library. Org Lett 2021; 23:3641-3645. [PMID: 33904751 PMCID: PMC8289287 DOI: 10.1021/acs.orglett.1c01042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Here we report the
simultaneous formation of doubly and triply
dynamic libraries as a result of exchange reactions between functionalized
organic building blocks. A combination of three different reversible
covalent linkages involving a boronate ester transesterification along
with an imine and disulfide exchange was employed to generate a new
type of fully organic triply dynamic molecular assembly.
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Affiliation(s)
- Wojciech Drożdż
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.,Center for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Anna Walczak
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.,Center for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Artur R Stefankiewicz
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.,Center for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
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16
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Hammer L, Van Zee NJ, Nicolaÿ R. Dually Crosslinked Polymer Networks Incorporating Dynamic Covalent Bonds. Polymers (Basel) 2021; 13:396. [PMID: 33513741 PMCID: PMC7865237 DOI: 10.3390/polym13030396] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/23/2021] [Accepted: 01/25/2021] [Indexed: 12/21/2022] Open
Abstract
Covalent adaptable networks (CANs) are polymeric networks containing covalent crosslinks that are dynamic under specific conditions. In addition to possessing the malleability of thermoplastics and the dimensional stability of thermosets, CANs exhibit a unique combination of physical properties, including adaptability, self-healing, shape-memory, stimuli-responsiveness, and enhanced recyclability. The physical properties and the service conditions (such as temperature, pH, and humidity) of CANs are defined by the nature of their constituent dynamic covalent bonds (DCBs). In response to the increasing demand for more sophisticated and adaptable materials, the scientific community has identified dual dynamic networks (DDNs) as a promising new class of polymeric materials. By combining two (or more) distinct crosslinkers in one system, a material with tailored thermal, rheological, and mechanical properties can be designed. One remarkable ability of DDNs is their capacity to combine dimensional stability, bond dynamicity, and multi-responsiveness. This review aims to give an overview of the advances in the emerging field of DDNs with a special emphasis on their design, structure-property relationships, and applications. This review illustrates how DDNs offer many prospects that single (dynamic) networks cannot provide and highlights the challenges associated with their synthesis and characterization.
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Affiliation(s)
| | | | - Renaud Nicolaÿ
- Chimie Moléculaire, Macromoléculaire, Matériaux, ESPCI Paris, CNRS, Université PSL, 10 rue Vauquelin, 75005 Paris, France; (L.H.); (N.J.V.Z.)
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17
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Zhou Y, Zhao ZN, Zhang YL, Liu J, Yuan Q, Schneider U, Huang YY. Brønsted Acid-Catalyzed General Petasis Allylation and Isoprenylation of Unactivated Ketones. Chemistry 2020; 26:10259-10264. [PMID: 32432354 DOI: 10.1002/chem.202001594] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/19/2020] [Indexed: 11/09/2022]
Abstract
Brønsted acid-catalyzed general Petasis allylation and isoprenylation of unactivated ketones were developed by using o-hydroxyaniline and the corresponding pinacolyl boronic esters. This robust methodology provided access to a broad variety of quaternary homoallylic amines and dienyl amines in high yields, proved to be applicable to a gram-scale synthesis, and allowed the synthesis of a potentially bioactive quaternary homoallylic aminodiol.
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Affiliation(s)
- Yang Zhou
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Zhen-Ni Zhao
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Yu-Long Zhang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Jun Liu
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Quan Yuan
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Uwe Schneider
- EaStCHEM School of Chemistry, The University of Edinburgh, The King's Buildings, David Brewster Road, Edinburgh, EH9 3FJ, UK
| | - Yi-Yong Huang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
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18
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Ćwik P, Ciosek-Skibińska P, Zabadaj M, Luliński S, Durka K, Wróblewski W. Differential Sensing of Saccharides Based on an Array of Fluorinated Benzosiloxaborole Receptors. SENSORS 2020; 20:s20123540. [PMID: 32580489 PMCID: PMC7349318 DOI: 10.3390/s20123540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/14/2020] [Accepted: 06/18/2020] [Indexed: 11/24/2022]
Abstract
Fluorinated benzosiloxaboroles–silicon congeners of benzoxaboroles, were synthesized and tested as molecular receptors for mono- and disaccharides. The receptors differed in the Lewis acidity of the boron center as well as in the number of potential binding sites. The calculated stability constants indicated different binding affinity of benzosiloxaborole derivatives towards selected saccharides, enabling their classification using a receptor array-based sensing. Unique fluorescence fingerprints were created on the basis of competitive interactions of the studied receptors with both Alizarin Red S (ARS) and tested saccharide molecules. Detailed chemometric analysis of the obtained fluorescence data (based on partial least squares-discriminant analysis and hierarchical clustering analysis) provided the differential sensing of common saccharides, in particular the differentiation between glucose and fructose. In addition, DFT calculations were carried out to shed light on the binding mechanism under different pH conditions.
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Affiliation(s)
- Paweł Ćwik
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (P.Ć.); (M.Z.); (W.W.)
| | - Patrycja Ciosek-Skibińska
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (P.Ć.); (M.Z.); (W.W.)
- Correspondence: ; Tel.: +48-22-234-7873
| | - Marcin Zabadaj
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (P.Ć.); (M.Z.); (W.W.)
| | - Sergiusz Luliński
- Chair of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (S.L.); (K.D.)
| | - Krzysztof Durka
- Chair of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (S.L.); (K.D.)
| | - Wojciech Wróblewski
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (P.Ć.); (M.Z.); (W.W.)
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19
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Zhou M, Li K, Chen D, Xu R, Xu G, Tang W. Enantioselective Reductive Coupling of Imines Templated by Chiral Diboron. J Am Chem Soc 2020; 142:10337-10342. [PMID: 32459089 DOI: 10.1021/jacs.0c04558] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We herein report a general, practical, and highly efficient method for asymmetric synthesis of a wide range of chiral vicinal diamines via reductive coupling of imines templated by chiral diboron. The protocol features high enantioselectivity and stereospecificity, mild reaction conditions, simple operating procedures, use of readily available starting materials, and a broad substrate scope. The method signifies the generality of diboron-enabled [3,3]-sigmatropic rearrangement.
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Affiliation(s)
- Mingkang Zhou
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China
| | - Kaidi Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China
| | - Dongping Chen
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China
| | - Ronghua Xu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China
| | - Guangqing Xu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.,NingBo Zejun Pharmaceutical Technology Co., Ltd, Hangzhou Bay New District, Ningbo 315336, China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.,School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China.,NingBo Zejun Pharmaceutical Technology Co., Ltd, Hangzhou Bay New District, Ningbo 315336, China
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20
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Martínez-Aguirre MA, Flores-Alamo M, Medrano F, Yatsimirsky AK. Examination of pinanediol-boronic acid ester formation in aqueous media: relevance to the relative stability of trigonal and tetrahedral boronate esters. Org Biomol Chem 2020; 18:2716-2726. [PMID: 32211727 DOI: 10.1039/d0ob00201a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The interaction of pinanediol with 2-fluorophenylboronic acid and several other substituted phenylboronic acids was studied in 40% vol. aqueous acetonitrile by 1H and 11B NMR, potentiometric and spectrophotometric titrations at variable pH values. The experimental results reveal the formation of a very stable trigonal ester (Ktrig ≈ 2 × 104 M-1) and a significantly less stable tetrahedral hydroxocomplex (Ktet ≈ 5 × 103 M-1) in contrast to the traditionally observed inverted order of stabilities Ktrig < Ktet. Comparison of the crystal structure of the trigonal ester isolated from aqueous acetonitrile with the DFT simulated structure of the respective hydroxocomplex shows that an unusual order of stabilities Ktrig > Ktet is observed in spite of the existence of the usual strain release effect in the O-B-O angle considered responsible for the typically observed increased stability of the tetrahedral hydroxocomplex. A complementary study of the stability of the six-membered cyclic boronate esters of chromotropic acid demonstrated the order Ktrig ≪ Ktet although the strain was absent in these esters. The results for m-, p-substituted phenylboronic acids show that the stability of both five- and six-membered trigonal esters formed with pinanediol and chromotropic acid, respectively, is insensitive to electronic effects but the electron accepting substituents stabilize the hydroxocomplexes. It follows from the whole set of results that Ktet can be much larger than Ktrig in the absence of the strain, but with a sufficiently acidic diol, and that the presence of the strain does not necessarily make Ktet larger than Ktrig for a less acidic diol with a purely saturated hydrocarbon backbone. Thus, the electronic effects manifested in the acidity of the diol appear to be more significant than the strain release effect in determining the Ktet/Ktrig ratio.
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Affiliation(s)
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico.
| | - Felipe Medrano
- Departamento de Ciencias químico-biológicas, Universidad de Sonora, Rosales y Luis Encinas Johnson s/n, Centro 83000, Hermosillo, Sonora, Mexico
| | - Anatoly K Yatsimirsky
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico.
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21
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Commins P, Al-Handawi MB, Karothu DP, Raj G, Naumov P. Efficiently self-healing boronic ester crystals. Chem Sci 2020; 11:2606-2613. [PMID: 34084321 PMCID: PMC8157749 DOI: 10.1039/c9sc05640h] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The perception of organic crystals being rigid static entities is quickly eroding, and molecular crystals are now matching a number of properties previously thought to be unique to soft materials. Here, we present crystals of a boronate ester that encompass many of the elastic and plastic mechanical properties of polymers such as bending, twisting, coiling and highly efficient self-healing of up to 67%, while they maintain their long-range structural order. The approach utilizes the concept of dynamic covalent chemistry and proves it can be applied towards ordered materials. This work expands our current understanding of the properties of crystalline molecular materials, and it could have implications towards the development of mechanically robust organic crystals that are capable of self-repair for durable all-organic electronics and soft robotics. Organic crystal is described that can be bent plastically and twisted elastically, and can self-heal to 67%, an efficiency that is an order-of-magnitude higher compared to the only previously reported example.![]()
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Affiliation(s)
- Patrick Commins
- New York University Abu Dhabi Abu Dhabi POB 129188 United Arab Emirates
| | | | | | - Gijo Raj
- New York University Abu Dhabi Abu Dhabi POB 129188 United Arab Emirates
| | - Panče Naumov
- New York University Abu Dhabi Abu Dhabi POB 129188 United Arab Emirates .,Radcliffe Institute for Advanced Study, Harvard University 10 Garden St. Cambridge MA 02138 USA
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22
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Das KK, Paul S, Panda S. Transition metal-free synthesis of alkyl pinacol boronates. Org Biomol Chem 2020; 18:8939-8974. [DOI: 10.1039/d0ob01721c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This review systematically outlined the research in the area of transition metal free synthesis of alkyl pinacol boronates, which are versatile and important scaffolds to construct diverse organic compounds.
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Affiliation(s)
- Kanak Kanti Das
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Swagata Paul
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
| | - Santanu Panda
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur 721302
- India
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23
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Nishiyabu R, Takahashi Y, Yabuki T, Gommori S, Yamamoto Y, Kitagishi H, Kubo Y. Boronate sol-gel method for one-step fabrication of polyvinyl alcohol hydrogel coatings by simple cast- and dip-coating techniques. RSC Adv 2019; 10:86-94. [PMID: 35492531 PMCID: PMC9048246 DOI: 10.1039/c9ra08208e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 12/16/2019] [Indexed: 12/25/2022] Open
Abstract
The self-assembly of polyvinyl alcohol (PVA) and benzene-1,4-diboronic acid (DBA) is employed as a sol–gel method for one-step fabrication of hydrogel coatings with versatile functionalities. A mixture of PVA and DBA in aqueous ethanol is prepared as a coating agent. The long pot life of the mixture allows for the coating of a wide range of materials with hydrogel films by simple cast- and dip-coating techniques. The resultant films show negligible dissolution in water and the intrinsic hydrophilicity of PVA provides the films with functional properties, such as improved antifogging property and resistance to protein and cell fouling. The self-assembling process shows adaptive inclusion properties toward nanoscale materials, such as metal–organic coordination polymers and inorganic nanoparticles, affording composite films. Furthermore, the coating film exhibits a unique secondary functionalization reactivity toward boronic acid-appended fluorescent dyes, through which a variety of materials are converted into fluorescent materials. The self-assembly of polyvinyl alcohol (PVA) and benzene-1,4-diboronic acid (DBA) is employed as a sol–gel method for one-step fabrication of hydrogel coatings with versatile functionalities.![]()
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Affiliation(s)
- Ryuhei Nishiyabu
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-ohsawa Hachioji Tokyo 192-0397 Japan
| | - Yuki Takahashi
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-ohsawa Hachioji Tokyo 192-0397 Japan
| | - Taro Yabuki
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-ohsawa Hachioji Tokyo 192-0397 Japan
| | - Shoji Gommori
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-ohsawa Hachioji Tokyo 192-0397 Japan
| | - Yuki Yamamoto
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-ohsawa Hachioji Tokyo 192-0397 Japan
| | - Hiroaki Kitagishi
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University Kyotanabe Kyoto 610-0321 Japan
| | - Yuji Kubo
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-ohsawa Hachioji Tokyo 192-0397 Japan
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24
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Aparece MD, Hu W, Morken JP. Catalytic Enantioselective Synthesis of β-Allenyl Boronic Esters by Conjunctive Cross-Coupling with Propargylic Carbonates. ACS Catal 2019; 9:11381-11385. [PMID: 33692912 DOI: 10.1021/acscatal.9b04453] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective conjunctive cross-coupling with propargylic carbonates affords (β-boryl allenes as the reaction product. The reaction is found to proceed through the intermediacy of dimethoxyboronate complexes that are generated in situ by a strain-induced ligand exchange reaction.
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Affiliation(s)
- Mark D. Aparece
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Weipeng Hu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - James P. Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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25
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Wong N, Petronijević F, Hong AY, Linghu X, Kelly SM, Hou H, Cravillion T, Lim NK, Robinson SJ, Han C, Molinaro C, Sowell CG, Gosselin F. Stereocontrolled Synthesis of Arylomycin-Based Gram-Negative Antibiotic GDC-5338. Org Lett 2019; 21:9099-9103. [PMID: 31668077 DOI: 10.1021/acs.orglett.9b03481] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We report herein an efficient, stereocontrolled, and chromatography-free synthesis of the novel broad spectrum antibiotic GDC-5338. The route features the construction of a functionalized tripeptide backbone, a high-yielding macrocyclization via a Pd-catalyzed Suzuki-Miyaura reaction, and the late-stage elaboration of key amide bonds with minimal stereochemical erosion. Through extensive reaction development and analytical understanding, these key advancements allowed the preparation of GDC-5338 in 17 steps, 15% overall yield, >99 A % HPLC, and >99:1 dr.
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Affiliation(s)
- Nicholas Wong
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Filip Petronijević
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Allen Y Hong
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Xin Linghu
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Sean M Kelly
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Haiyun Hou
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Theresa Cravillion
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Ngiap-Kie Lim
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Sarah J Robinson
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Chong Han
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Carmela Molinaro
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - C Gregory Sowell
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Francis Gosselin
- Department of Small Molecule Process Chemistry , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
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26
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Malapit CA, Bour JR, Laursen SR, Sanford MS. Mechanism and Scope of Nickel-Catalyzed Decarbonylative Borylation of Carboxylic Acid Fluorides. J Am Chem Soc 2019; 141:17322-17330. [PMID: 31617708 PMCID: PMC11103277 DOI: 10.1021/jacs.9b08961] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This Article describes the development of a base-free, nickel-catalyzed decarbonylative coupling of carboxylic acid fluorides with diboron reagents to selectively afford aryl boronate ester products. Detailed studies were conducted to assess the relative rates of direct transmetalation between aryl boronate esters and diboron reagents and a bisphosphine nickel(aryl)(fluoride) intermediate. These investigations revealed that diboron reagents undergo transmetalation with this Ni(aryl)(fluoride) intermediate at rates significantly faster than their aryl boronate ester congeners. Furthermore, the reactivity of both boron reagents toward transmetalation is enhanced with increasing electrophilicity of the boron center. These mechanistic insights were leveraged to develop a catalytic decarbonylative borylation of acid fluorides that proved applicable to a variety of (hetero)aryl carboxylic acid fluorides as well as diverse diboron reagents. The acid fluorides can be generated in situ directly from carboxylic acids. Furthermore, the mechanistic studies directed the identification of various air-stable Ni pre-catalysts for this transformation.
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Affiliation(s)
- Christian A. Malapit
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - James R. Bour
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - Simon R. Laursen
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - Melanie S. Sanford
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
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27
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Meng F, Saed MO, Terentjev EM. Elasticity and Relaxation in Full and Partial Vitrimer Networks. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01123] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Fanlong Meng
- Max Planck Institute for Dynamics and Self-Organization, Göttingen 37077, Germany
| | - Mohand O. Saed
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K
| | - Eugene M. Terentjev
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K
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28
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Tappin NDC, Michalska W, Rohrbach S, Renaud P. Cyclopropanation of Terminal Alkenes through Sequential Atom‐Transfer Radical Addition/1,3‐Elimination. Angew Chem Int Ed Engl 2019; 58:14240-14244. [DOI: 10.1002/anie.201907962] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Nicholas D. C. Tappin
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Weronika Michalska
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Simon Rohrbach
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Philippe Renaud
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
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29
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Tappin NDC, Michalska W, Rohrbach S, Renaud P. Cyclopropanation of Terminal Alkenes through Sequential Atom‐Transfer Radical Addition/1,3‐Elimination. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907962] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Nicholas D. C. Tappin
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Weronika Michalska
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Simon Rohrbach
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Philippe Renaud
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
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30
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Manaster AJ, Batty C, Tiet P, Ooi A, Bachelder EM, Ainslie KM, Broaders KE. Oxidation-Sensitive Dextran-Based Polymer with Improved Processability through Stable Boronic Ester Groups. ACS APPLIED BIO MATERIALS 2019; 2:3755-3762. [DOI: 10.1021/acsabm.9b00399] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Amanda J. Manaster
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts 01075, United States
| | - Cole Batty
- Eshelman School of Pharmacy, Division of Pharmacoengineering and Molecular Pharmaceutics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Pamela Tiet
- Eshelman School of Pharmacy, Division of Pharmacoengineering and Molecular Pharmaceutics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Annabelle Ooi
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts 01075, United States
| | - Eric M. Bachelder
- Eshelman School of Pharmacy, Division of Pharmacoengineering and Molecular Pharmaceutics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Kristy M. Ainslie
- Eshelman School of Pharmacy, Division of Pharmacoengineering and Molecular Pharmaceutics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Kyle E. Broaders
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts 01075, United States
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31
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Demianenko E, Rayevsky A, Soriano-Ursúa MA, Trujillo-Ferrara JG. Theoretical Coupling and Stability of Boronic Acid Adducts with Catecholamines. LETT DRUG DES DISCOV 2019. [DOI: 10.2174/1570180815666180710101604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background:
Catecholamines combined with boric/boronic acids are attractive chemical
agents in drug design because some of their adducts have shown interesting biological activity.
Scant information exists about their stability.
Objective:
The aim of the present theoretical study was to explore the role of boron in molecules
that combine catecholamines and boric/boronic acids, with a particular interest in examining
stability.
Method:
The methodology was based on the US GAMESS program using DFT with the B3LYP
exchange-correlation functional and the 6-31G (d,p) split-valence basis set.
Results:
According to the current findings, the boron-containing compounds (BCCs) exhibit weaker
bonding to the hydroxyls on the ethylamine moiety than to those in the aromatic ring. The strongest
binding site of a hydroxyl group was often found to be in meta-position (relative to ethylamine
moiety) for boron-free compounds and in para-position for BCCs. Nonetheless, the methyl substituent
in the amino group was able to induce changes in this pattern. We analyzed feasible boronsubstituted
structures and assessed the relative strength of the respective C-B bonds, which allowed
for the identification of the favorable points for reaction and stability.
Conclusion:
It is feasible to form adducts by bonding on the amine and catechol sides of catecholamines.
The presence of boron stabilizes the adducts in para-position. Since some of these BCCs
are promising therapeutic agents, understanding the mechanisms of reaction is relevant for drug
design.
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Affiliation(s)
- Eugeniy Demianenko
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Str., Kyiv, 03164, Ukraine
| | - Alexey Rayevsky
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Str., Kyiv, 03164, Ukraine
| | - Marvin A. Soriano-Ursúa
- Seccion de Estudios de Posgrado e Investigacion, Escuela Superior de Medicina, Instituto Politecnico Nacional, Plan de San Luis y Diaz Miron s/n, Mexico City, 11340, Mexico
| | - José G. Trujillo-Ferrara
- Seccion de Estudios de Posgrado e Investigacion, Escuela Superior de Medicina, Instituto Politecnico Nacional, Plan de San Luis y Diaz Miron s/n, Mexico City, 11340, Mexico
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32
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Shimada N, Urata S, Fukuhara K, Tsuneda T, Makino K. 2,6-Bis(trifluoromethyl)phenylboronic Esters as Protective Groups for Diols: A Protection/Deprotection Protocol for Use under Mild Conditions. Org Lett 2018; 20:6064-6068. [PMID: 30226778 DOI: 10.1021/acs.orglett.8b02427] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The application of 2,6-bis(trifluoromethyl)phenyl boronic acid ( o-FXylB(OH)2; o-FXyl = 2,6-(CF3)2C6H3) as a recoverable and reusable protective agent for diols is described. The resulting cyclic boronic esters are water- and air-stable and tolerant to various organic transformations. Moreover, they can be deprotected under mild conditions. This methodology was applied to the synthesis of a highly conjugated enetriyne natural product with anti-angiogenic activities.
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Affiliation(s)
- Naoyuki Shimada
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences , Kitasato University , Tokyo 108-8641 , Japan
| | - Sari Urata
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences , Kitasato University , Tokyo 108-8641 , Japan
| | - Kenji Fukuhara
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences , Kitasato University , Tokyo 108-8641 , Japan
| | - Takao Tsuneda
- Fuel Cell Nanomaterials Center , University of Yamanashi , Kofu 400-0021 , Japan
| | - Kazuishi Makino
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences , Kitasato University , Tokyo 108-8641 , Japan
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33
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Sayes M, Benoit G, Charette AB. Borocyclopropanation of Styrenes Mediated by UV-light Under Continuous Flow Conditions. Angew Chem Int Ed Engl 2018; 57:13514-13518. [DOI: 10.1002/anie.201807347] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/02/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Morgane Sayes
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - Guillaume Benoit
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - André B. Charette
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
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34
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Sayes M, Benoit G, Charette AB. Borocyclopropanation of Styrenes Mediated by UV-light Under Continuous Flow Conditions. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Morgane Sayes
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - Guillaume Benoit
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - André B. Charette
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
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35
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Ketike T, Velpula VRK, Madduluri VR, Kamaraju SRR, Burri DR. Carbonylative Suzuki-Miyaura Cross-Coupling Over Pd NPs/Rice-Husk Carbon-Silica Solid Catalyst: Effect Of 1,4-Dioxane Solvent. ChemistrySelect 2018. [DOI: 10.1002/slct.201801100] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Thirupathaiah Ketike
- Inorganic & Physical Chemistry; Catalysis; Indian Institute of Chemical Technology; Uppal Road, Tarnaka Hyderabad 500007 India
| | - Venkata Ramana Kumar Velpula
- Inorganic & Physical Chemistry; Catalysis; Indian Institute of Chemical Technology; Uppal Road, Tarnaka Hyderabad 500007 India
| | - Venkata Rao Madduluri
- Inorganic & Physical Chemistry; Catalysis; Indian Institute of Chemical Technology; Uppal Road, Tarnaka Hyderabad 500007 India
| | - Seetha Rama Rao Kamaraju
- Inorganic & Physical Chemistry; Catalysis; Indian Institute of Chemical Technology; Uppal Road, Tarnaka Hyderabad 500007 India
| | - David Raju Burri
- Inorganic & Physical Chemistry; Catalysis; Indian Institute of Chemical Technology; Uppal Road, Tarnaka Hyderabad 500007 India
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36
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Yan L, Meng Y, Haeffner F, Leon RM, Crockett MP, Morken JP. Carbohydrate/DBU Cocatalyzed Alkene Diboration: Mechanistic Insight Provides Enhanced Catalytic Efficiency and Substrate Scope. J Am Chem Soc 2018; 140:3663-3673. [PMID: 29442502 DOI: 10.1021/jacs.7b12316] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mechanistic investigation of the carbohydrate/DBU cocatalyzed enantioselective diboration of alkenes is presented. These studies provide an understanding of the origin of stereoselectivity and also reveal a strategy for enhancing reactivity and broadening the substrate scope.
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Affiliation(s)
- Lu Yan
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Yan Meng
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Robert M Leon
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Michael P Crockett
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - James P Morken
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
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37
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Kanemoto K, Yoshida S, Hosoya T. Modified Conditions for Copper-catalyzed ipso-Thiolation of Arylboronic Acid Esters with Thiosulfonates. CHEM LETT 2018. [DOI: 10.1246/cl.170907] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kazuya Kanemoto
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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38
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Daniels BE, Stivala CE. A solid-phase approach for the synthesis of α-aminoboronic acid peptides. RSC Adv 2018; 8:3343-3347. [PMID: 35541192 PMCID: PMC9077542 DOI: 10.1039/c7ra13479g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 01/10/2018] [Indexed: 01/06/2023] Open
Abstract
A solid-phase synthesis of α-aminoboronic acid peptides using a 1-glycerol polystyrene resin is described.
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39
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Nishiyabu R, Tomura M, Okade T, Kubo Y. Boronic acids as molecular inks for surface functionalization of polyvinyl alcohol substrates. NEW J CHEM 2018. [DOI: 10.1039/c8nj00992a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Boronic acids are proposed to be used as molecular inks for surface functionalization of polyvinyl alcohol substrates using marker pen applicators.
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Affiliation(s)
- Ryuhei Nishiyabu
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Miku Tomura
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Tomo Okade
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Yuji Kubo
- Department of Applied Chemistry
- Graduate School of Urban Environmental Sciences
- Tokyo Metropolitan University
- Hachioji
- Japan
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40
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Simmons EM, Mudryk B, Lee AG, Qiu Y, Razler TM, Hsiao Y. Development of a Kilogram-Scale Process for the Enantioselective Synthesis of 3-Isopropenyl-cyclohexan-1-one via Rh/DTBM-SEGPHOS-Catalyzed Asymmetric Hayashi Addition Enabled by 1,3-Diol Additives. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00253] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eric M. Simmons
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Boguslaw Mudryk
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Andrew G. Lee
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Yuping Qiu
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Thomas M. Razler
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Yi Hsiao
- Chemical & Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
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41
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Badertscher R, Freiburghaus C, Wechsler D, Irmler S. Validated method for the determination of propane-1,2-diol, butane-2,3-diol, and propane-1,3-diol in cheese and bacterial cultures using phenylboronic esterification and GC–MS. Food Chem 2017; 230:372-377. [DOI: 10.1016/j.foodchem.2017.03.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 02/24/2017] [Accepted: 03/11/2017] [Indexed: 12/01/2022]
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42
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Kombala CJ, Ekanayake DI, Gross DE. Boron trifluoride facilitated transesterification of dioxaborolanes. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.08.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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43
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Chen D, Xu G, Zhou Q, Chung LW, Tang W. Practical and Asymmetric Reductive Coupling of Isoquinolines Templated by Chiral Diborons. J Am Chem Soc 2017; 139:9767-9770. [DOI: 10.1021/jacs.7b04256] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dongping Chen
- School
of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
| | - Guangqing Xu
- State
Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China
| | - Qinghai Zhou
- Department
of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
- College
of Chemistry, Nankai University, Tianjin 300071, China
| | - Lung Wa Chung
- Department
of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Wenjun Tang
- School
of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
- State
Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China
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44
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Effects of alkyl or alkyloxy side chains in poly[4,6-bis(3′-dodecylthien-2′-yl)thieno-[3,4- c ][1,2,5]thiadiazole-5′,5′-diyl- alt -2,5-di(alkyl or alkyloxy)-1,4-phenylene]: Synthesis, photophysics, and spectroelectrochemical and photovoltaic properties. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.04.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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45
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Röttger M, Domenech T, van der Weegen R, Breuillac A, Nicolaÿ R, Leibler L. High-performance vitrimers from commodity thermoplastics through dioxaborolane metathesis. Science 2017; 356:62-65. [DOI: 10.1126/science.aah5281] [Citation(s) in RCA: 614] [Impact Index Per Article: 87.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 02/07/2017] [Accepted: 03/08/2017] [Indexed: 01/19/2023]
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46
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Wu K, Cheng R, Zhang J, Meng F, Deng C, Zhong Z. Micellar nanoformulation of lipophilized bortezomib: high drug loading, improved tolerability and targeted treatment of triple negative breast cancer. J Mater Chem B 2017. [DOI: 10.1039/c7tb01297g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Lipophilization of bortezomib with pinanediol enables efficacious drug loading and targeted tumor chemotherapy with reduction-sensitive self-crosslinked micellar systems.
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Affiliation(s)
- Kaiqi Wu
- Biomedical Polymers Laboratory
- and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Ru Cheng
- Biomedical Polymers Laboratory
- and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Jian Zhang
- Biomedical Polymers Laboratory
- and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Fenghua Meng
- Biomedical Polymers Laboratory
- and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Chao Deng
- Biomedical Polymers Laboratory
- and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Zhiyuan Zhong
- Biomedical Polymers Laboratory
- and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
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47
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Murafuji T, Shintaku K, Nagao K, Mikata Y, Ishiguro K, Kamijo S. Synthesis and Structural Characterization of Diazulenylborinic Acid. HETEROCYCLES 2017. [DOI: 10.3987/com-17-13651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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48
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Fang L, Yan L, Haeffner F, Morken JP. Carbohydrate-Catalyzed Enantioselective Alkene Diboration: Enhanced Reactivity of 1,2-Bonded Diboron Complexes. J Am Chem Soc 2016; 138:2508-11. [PMID: 26854364 PMCID: PMC4896641 DOI: 10.1021/jacs.5b13174] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic enantioselective diboration of alkenes is accomplished with readily available carbohydrate-derived catalysts. Mechanistic experiments suggest the intermediacy of 1,2-bonded diboronates.
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Affiliation(s)
- Lichao Fang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Lu Yan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - James P. Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
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49
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Rocard L, Berezin A, De Leo F, Bonifazi D. Templated Chromophore Assembly by Dynamic Covalent Bonds. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507186] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lou Rocard
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
| | - Andrey Berezin
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
| | - Federica De Leo
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
| | - Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
- Department of Pharmaceutical and Chemical Sciences and INSTM UdR Trieste, University of Trieste, Piazzale Europa 1, Trieste 34127 (Italy)
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50
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Rocard L, Berezin A, De Leo F, Bonifazi D. Templated Chromophore Assembly by Dynamic Covalent Bonds. Angew Chem Int Ed Engl 2015; 54:15739-43. [PMID: 26637106 DOI: 10.1002/anie.201507186] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Indexed: 11/10/2022]
Abstract
Through the simultaneous use of three orthogonal dynamic covalent reactions, namely disulfide, boronate, and acyl hydrazone formation, we conceived a facile and versatile protocol to spatially organize tailored chromophores, which absorb in the blue, red, and yellow regions, on a preprogrammed α-helix peptide. This approach allowed the assembly of the dyes in the desired ratio and spacing, as dictated by both the relative positioning and distribution of the recognition units on the peptide scaffold. Steady-state UV/Vis absorption and emission studies suggest an energy transfer from the yellow and red donors to the blue acceptor. A molecular dynamics simulation supports the experimental findings that the helical structure is maintained after the assembly and the three dyes are confined in defined conformational spaces.
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Affiliation(s)
- Lou Rocard
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
| | - Andrey Berezin
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
| | - Federica De Leo
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium)
| | - Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry University of Namur (UNamur), Rue de Bruxelles 61, Namur 5000 (Belgium). .,Department of Pharmaceutical and Chemical Sciences and INSTM UdR Trieste, University of Trieste, Piazzale Europa 1, Trieste 34127 (Italy).
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