1
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Zeng D, Zhang L, Wang W, Li G, Zhao XJ, He Y. Electrochemical Synthesis of Azaborininones under Metal‐Catalyst‐Free Mild Conditions. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dongwen Zeng
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | - Lizhu Zhang
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | - Wei Wang
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | - Ganpeng Li
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | | | - Yonghui He
- Yunnan Minzu University School of Ethnic Medicine 2929 Yuehua Street 650500 Kunming CHINA
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2
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Bhattacharjee A, Davies GHM, Saeednia B, Wisniewski SR, Molander GA. Selectivity in the Elaboration of Bicyclic Borazarenes. Adv Synth Catal 2020; 363:2256-2273. [PMID: 34335130 DOI: 10.1002/adsc.202001384] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Among aromatic compounds, borazarenes represent a significant class of isosteres in which carbon-carbon bonds have been replaced by B-N bonds. Described herein is a summary of the selective reactions that have been developed for known systems, as well as a summary of computationally-based predictions of selectivities that might be anticipated in reactions of yet unrealized substructures.
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Affiliation(s)
- Ayan Bhattacharjee
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Geraint H M Davies
- Small Molecule Drug Development, Bristol Myers Squibb Company, 200 Cambridge Park Drive, Cambridge, Massachusetts 02140, United States
| | - Borna Saeednia
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Steven R Wisniewski
- Chemical Process Development, Bristol Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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3
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An Efficient Ni/Pd Catalyzed Chemoselective Synthesis of 1,3,2‐Benzodiazaborininones from Boronic Acids and Anthranilamides. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900827] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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4
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Kumar N, Reddy RR, Masarwa A. Stereoselective Desymmetrization of
gem
‐Diborylalkanes by “Trifluorination”. Chemistry 2019; 25:8008-8012. [DOI: 10.1002/chem.201901267] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/08/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Nivesh Kumar
- Institute of ChemistryThe Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 9190401 Israel
| | - Reddy Rajasekhar Reddy
- Institute of ChemistryThe Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 9190401 Israel
| | - Ahmad Masarwa
- Institute of ChemistryThe Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 9190401 Israel
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5
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Wang X, Davies GHM, Koschitzky A, Wisniewski SR, Kelly CB, Molander GA. Photoredox Catalysis Enables Access to N-Functionalized 2,1-Borazaronaphthalenes. Org Lett 2019; 21:2880-2884. [PMID: 30916973 DOI: 10.1021/acs.orglett.9b00884] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and utilization of a class of 2,1-borazaronaphthyltrifluoroborate reagents that provide a general solution to the challenge of N-functionalization of the 2,1-borazaronaphthalene core is described. By adorning the nitrogen of this core with a trifluoroboratomethyl unit, a suite of odd-electron processes can be executed, installing motifs that would otherwise be inaccessible using a two-electron approach. In addition, this process enables rapid annulation, furnishing a heretofore unknown polycyclic B-N species.
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Affiliation(s)
- Xie Wang
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States.,State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha , 410082 , People's Republic of China
| | - Geraint H M Davies
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Adriel Koschitzky
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Steven R Wisniewski
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
| | - Christopher B Kelly
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , P.O. Box 842006 Richmond , Virginia 23284-9069 , United States.,Medicines for All Institute , Virginia Commonwealth University , Biotech 8, 737 N. Fifth Street , Richmond , Virginia 23219-1441 United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104-6323 , United States
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6
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Azzena U, Carraro M, Pisano L, Monticelli S, Bartolotta R, Pace V. Cyclopentyl Methyl Ether: An Elective Ecofriendly Ethereal Solvent in Classical and Modern Organic Chemistry. CHEMSUSCHEM 2019; 12:40-70. [PMID: 30246930 PMCID: PMC6391966 DOI: 10.1002/cssc.201801768] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/23/2018] [Indexed: 05/07/2023]
Abstract
Solvents represent one of the major contributions to the environmental impact of fine-chemical synthesis. As a result, the use of environmentally friendly solvents in widely employed reactions is a challenge of vast real interest in contemporary organic chemistry. Within this Review, a great variety of examples showing how cyclopentyl methyl ether has been established as particularly useful for this purpose are reported. Indeed, its low toxicity, high boiling point, low melting point, hydrophobicity, chemical stability towards a wide range of conditions, exceptional stability towards the abstraction of hydrogen atoms, relatively low latent heat of vaporization, and the ease with which it can be recovered and recycled enable its successful employment as a solvent in a wide range of synthetic applications, including organometallic chemistry, catalysis, biphasic reactions, oxidations, and radical reactions.
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Affiliation(s)
- Ugo Azzena
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Massimo Carraro
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Luisa Pisano
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Serena Monticelli
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Roberta Bartolotta
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Vittorio Pace
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
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7
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Abstract
BN/CC isosterism has emerged as a viable strategy to expand the chemical space of organic molecules. In particular, the application of BN/CC isosterism to arenes has received significant attention due to the vast available chemical space provided by aromatic hydrocarbons. The synthetic efforts directed at assembling novel aromatic BN heterocycles have resulted in the discovery of new properties and functions in a variety of fields including biomedical research, medicinal chemistry, materials science, catalysis, and organic synthesis. This tutorial review specifically covers recent advances in synthetic technologies that functionalize assembled boron-nitrogen (BN) heterocycles and highlights their distinct reactivity and selectivity in comparison to their carbonaceous counterparts. It is intended to serve as a state-of-the-art compendium for readers who are interested in the reaction chemistry of BN heterocycles.
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Affiliation(s)
- Cameron R McConnell
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts, 02467-3860, USA.
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8
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Mitsudo K, Shigemori K, Mandai H, Wakamiya A, Suga S. Synthesis and Properties of Dithieno-Fused 1,4-Azaborine Derivatives. Org Lett 2018; 20:7336-7340. [DOI: 10.1021/acs.orglett.8b03316] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Koichi Mitsudo
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Keisuke Shigemori
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Hiroki Mandai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Atsushi Wakamiya
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Seiji Suga
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
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9
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Giustra ZX, Liu SY. The State of the Art in Azaborine Chemistry: New Synthetic Methods and Applications. J Am Chem Soc 2018; 140:1184-1194. [PMID: 29314835 PMCID: PMC6190836 DOI: 10.1021/jacs.7b09446] [Citation(s) in RCA: 257] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Boron-nitrogen heteroarenes hold great promise for practical application in many areas of chemistry. Enduring interest in realizing this potential has in turn driven perennial innovation with respect to these compounds' synthesis. This Perspective discusses in detail the most recent advances in methods pertaining to the preparation of BN-isosteres of benzene, naphthalene, and their derivatives. Additional focus is placed on the progress enabled by these syntheses toward functional utility of such BN-heterocycles in biochemistry and pharmacology, materials science, and transition-metal-based catalysis. The prospects for future research efforts in these and related fields are also assessed.
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Affiliation(s)
- Zachary X. Giustra
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
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10
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Bélanger-Chabot G, Braunschweig H, Roy DK. Recent Developments in Azaborinine Chemistry. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700562] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Guillaume Bélanger-Chabot
- Institute for Inorganic Chemistry; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Dipak Kumar Roy
- Institute for Inorganic Chemistry; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
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11
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The versatility of boron in biological target engagement. Nat Chem 2017; 9:731-742. [DOI: 10.1038/nchem.2814] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 05/12/2017] [Indexed: 12/20/2022]
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12
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Davies GHM, Mukhtar A, Saeednia B, Sherafat F, Kelly CB, Molander GA. Azaborininones: Synthesis and Structural Analysis of a Carbonyl-Containing Class of Azaborines. J Org Chem 2017; 82:5380-5390. [PMID: 28485935 PMCID: PMC5443257 DOI: 10.1021/acs.joc.7b00747] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An approach to access azaborininones (carbonyl-containing, boron-based heterocyclic scaffolds) using simple reagents and conditions from both organotrifluoroborates and boronic acids is described. An inexpensive, common reagent, SiO2, was found to serve as both a fluorophile and desiccant to facilitate the annulation process across three different azaborininone platforms. Computational analysis of some of the cores synthesized in this study was undertaken to compare the azaborininones with the analogous carbon-based heterocyclic systems. Computationally derived pKa values, NICS aromaticity calculations, and electrostatic potential surfaces revealed a unique isoelectronic/isostructural relationship between these azaborines and their carbon isosteres that changed based on boron connectivity. Correlation to experimentally derived data supports the computational findings.
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Affiliation(s)
- Geraint H M Davies
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Asma Mukhtar
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Institute of Chemistry, University of the Punjab , Lahore-54590, Pakistan
| | - Borna Saeednia
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology , Azadi Street, P.O. Box 111559516, Tehran, Iran
| | - Fatemeh Sherafat
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,School of Chemistry, College of Science, University of Tehran , P.O. Box 141556455, Tehran, Iran
| | - Christopher B Kelly
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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13
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Zhao P, Nettleton DO, Karki RG, Zécri FJ, Liu SY. Medicinal Chemistry Profiling of Monocyclic 1,2-Azaborines. ChemMedChem 2017; 12:358-361. [PMID: 28181424 PMCID: PMC5654323 DOI: 10.1002/cmdc.201700047] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Indexed: 11/08/2022]
Abstract
The first examples of biologically active monocyclic 1,2-azaborines have been synthesized and demonstrated to exhibit not only improved in vitro aqueous solubility in comparison with their corresponding carbonaceous analogues, but in the context of a CDK2 inhibitor, also improved biological activity and better in vivo oral bioavailability. This proof-of-concept study establishes the viability of monocyclic 1,2-azaborines as a novel pharmacophore with distinct pharmacological profiles that can help address challenges associated with solubility in drug development research.
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Affiliation(s)
- Peng Zhao
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467 (USA),
| | - David O. Nettleton
- Novartis Institutes for Biomedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139 (USA),
| | - Rajeshri G. Karki
- Novartis Institutes for Biomedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139 (USA),
| | - Frédéric J. Zécri
- Novartis Institutes for Biomedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139 (USA),
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467 (USA),
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14
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Davies GHM, Zhou ZZ, Jouffroy M, Molander GA. Method for Accessing Nitrogen-Containing, B-Heteroaryl-Substituted 2,1-Borazaronaphthalenes. J Org Chem 2016; 82:549-555. [PMID: 27966969 PMCID: PMC5224235 DOI: 10.1021/acs.joc.6b02574] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The azaborine motif provides a mimic of aromatic systems through replacement of a C═C bond with a B-N bond. In particular, 2,1-borazaronaphthalenes, accessible through robust methods of synthesis and subsequent functionalization, afford an ideal platform to use for a variety of applications. However, the scope of substructures for this archetype has been limited by the lack of nitrogen-containing heteroaryls that can be incorporated within them. In this study, modified reaction conditions were developed to provide access to a wider range of substructures.
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Affiliation(s)
- Geraint H M Davies
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Zhao-Zhao Zhou
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P.R. China
| | - Matthieu Jouffroy
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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15
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Xu S, Zhang Y, Li B, Liu SY. Site-Selective and Stereoselective trans-Hydroboration of 1,3-Enynes Catalyzed by 1,4-Azaborine-Based Phosphine-Pd Complex. J Am Chem Soc 2016; 138:14566-14569. [PMID: 27802037 DOI: 10.1021/jacs.6b09759] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A concise synthesis of monobenzofused 1,4-azaborine phosphine ligands (Senphos) is described. These Senphos ligands uniquely support Pd-catalyzed trans-selective hydroboration of terminal and internal 1,3-enynes to furnish corresponding dienylboronates in high efficiency and diastereoselectivity. X-ray structural analysis of the Senphos-Pd(0) complex reveals a κ2-P-η2-BC coordination mode, and this isolated complex has been shown to serve as a competent catalyst for the trans-hydroboration reaction. This work demonstrates that the expanded chemical space provided by the BN/CC isosterism approach translates into the functional space in the context of stereoselective catalytic transformations.
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Affiliation(s)
- Senmiao Xu
- Department of Chemistry, Boston College , Chestnut Hill, Massachusetts 02467-3860, United States
| | - Yuanzhe Zhang
- Department of Chemistry, Boston College , Chestnut Hill, Massachusetts 02467-3860, United States
| | - Bo Li
- Department of Chemistry, Boston College , Chestnut Hill, Massachusetts 02467-3860, United States
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College , Chestnut Hill, Massachusetts 02467-3860, United States
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16
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Lee H, Fischer M, Shoichet BK, Liu SY. Hydrogen Bonding of 1,2-Azaborines in the Binding Cavity of T4 Lysozyme Mutants: Structures and Thermodynamics. J Am Chem Soc 2016; 138:12021-4. [PMID: 27603116 DOI: 10.1021/jacs.6b06566] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Protein crystallography and calorimetry were used to characterize the binding of 1,2-azaborines to model cavities in T4 lysozyme in direct comparison to their carbonaceous counterparts. In the apolar L99A cavity, affinity for Ab dropped only slightly versus benzene. In the cavity designed to accommodate a single hydrogen bond (L99A/M102Q), Gln102═O···H-N hydrogen bonding for Ab and BEtAb was observed in the crystallographic complexes. The strength of the hydrogen bonding was estimated as 0.94 and 0.64 kcal/mol for Ab and BEtAb, respectively. This work unambiguously demonstrates that 1,2-azaborines can be readily accommodated in classic aryl recognition pockets and establishes one of 1,2-azaborine's distinguishing features from its carbonaceous isostere benzene: its ability to serve as an NH hydrogen bond donor in a biological setting.
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Affiliation(s)
- Hyelee Lee
- Department of Chemistry, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Marcus Fischer
- Department of Pharmaceutical Chemistry, University of California, San Francisco , San Francisco, California 94158, United States
| | - Brian K Shoichet
- Department of Pharmaceutical Chemistry, University of California, San Francisco , San Francisco, California 94158, United States
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College , Chestnut Hill, Massachusetts 02467, United States
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17
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Neeve EC, Geier SJ, Mkhalid IAI, Westcott SA, Marder TB. Diboron(4) Compounds: From Structural Curiosity to Synthetic Workhorse. Chem Rev 2016; 116:9091-161. [PMID: 27434758 DOI: 10.1021/acs.chemrev.6b00193] [Citation(s) in RCA: 730] [Impact Index Per Article: 91.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although known for over 90 years, only in the past two decades has the chemistry of diboron(4) compounds been extensively explored. Many interesting structural features and reaction patterns have emerged, and more importantly, these compounds now feature prominently in both metal-catalyzed and metal-free methodologies for the formation of B-C bonds and other processes.
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Affiliation(s)
- Emily C Neeve
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| | - Stephen J Geier
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | | | - Stephen A Westcott
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
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18
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Liu X, Zhang Y, Li B, Zakharov LN, Vasiliu M, Dixon DA, Liu SY. A Modular Synthetic Approach to Monocyclic 1,4-Azaborines. Angew Chem Int Ed Engl 2016; 55:8333-7. [PMID: 27238094 DOI: 10.1002/anie.201602840] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Indexed: 11/07/2022]
Abstract
A simple and general method for the synthesis of a wide range of monocyclic 1,4-azaborines, including the first examples containing B heteroatoms is described. Post-heterocycle-formation olefin isomerization was employed as a key strategy. This new synthetic method provides fundamental insight into the resonance stabilization and photophysical properties of 1,4-azaborines.
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Affiliation(s)
- Xuguang Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA.,College of Chemistry and Chemical Engineering, Tianjin University of Technology, China
| | - Yuanzhe Zhang
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | - Bo Li
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | | | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, 35487, USA
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, 35487, USA.
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA.
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19
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Liu X, Zhang Y, Li B, Zakharov LN, Vasiliu M, Dixon DA, Liu S. A Modular Synthetic Approach to Monocyclic 1,4‐Azaborines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602840] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xuguang Liu
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
- College of Chemistry and Chemical Engineering Tianjin University of Technology China
| | - Yuanzhe Zhang
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
| | - Bo Li
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
| | | | - Monica Vasiliu
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - David A. Dixon
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Shih‐Yuan Liu
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
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20
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Jouffroy M, Davies GHM, Molander GA. Accessing Elaborated 2,1-Borazaronaphthalene Cores Using Photoredox/Nickel Dual-Catalytic Functionalization. Org Lett 2016; 18:1606-9. [PMID: 26986819 PMCID: PMC5373477 DOI: 10.1021/acs.orglett.6b00466] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly effective method for derivatizing 2,1-borazaronaphthalene cores using ammonium alkylbis(catecholato)silicates via photoredox/nickel dual catalysis is reported. By forging C(sp)(3)-C(sp)(2) bonds via this approach, alkyl fragments with various functional groups can be introduced to the azaborine core, affording previously inaccessible heterocyclic isosteres in good to excellent yields. The base-free, room-temperature conditions outlined allow sensitive functional group tolerance, even permitting the cross-coupling of unprotected primary and secondary amines.
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Affiliation(s)
- Matthieu Jouffroy
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Geraint H. M. Davies
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A. Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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Yruegas S, Patterson DC, Martin CD. Oxygen insertion into boroles as a route to 1,2-oxaborines. Chem Commun (Camb) 2016; 52:6658-61. [DOI: 10.1039/c6cc02040b] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of 1,2-oxaborines is accomplishedviathe reaction of pentaarylboroles withN-methylmorpholine-N-oxideviaa 1,1-insertion reaction.
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Affiliation(s)
- Sam Yruegas
- Department of Chemistry and Biochemistry
- Baylor University
- Waco
- USA
| | | | - Caleb D. Martin
- Department of Chemistry and Biochemistry
- Baylor University
- Waco
- USA
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