1
|
Schepper J, Orthaber A, Pammer F. Tetrazole-Functionalized Organoboranes Exhibiting Dynamic Intramolecular N→B-Coordination and Cyanide-Selective Anion Binding. Chemistry 2024; 30:e202401466. [PMID: 38708576 DOI: 10.1002/chem.202401466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 04/25/2024] [Accepted: 04/25/2024] [Indexed: 05/07/2024]
Abstract
Starting from two different cyano-functionalized organoboranes, we demonstrate that 1,3-dipolar [3+2] azide-nitrile cycloaddition can serve to generate libraries of alkyl-tetrazole-functionalized compounds capable of intramolecular N→B-Lewis adduct formation. Due to the relatively low basicity of tetrazoles, structures can be generated that exhibit weak and labile N→B-coordination. The reaction furnishes 1- and 2-alkylated regio-isomers that exhibit different effective Lewis-acidities at the boron centers, and vary in their optical absorption and fluorescence properties. Indeed, we identified derivatives capable of selectively binding cyanide over fluoride, as confirmed by 11B NMR. This finding demonstrates the potentialities of this synthetic strategy to systematically fine-tune the properties of lead structures that are of interest as chemical sensors.
Collapse
Affiliation(s)
- Jonas Schepper
- Institute of Organic Chemistry II and Advanced Materials, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Andreas Orthaber
- Department of Chemistry - Ångström laboratories, Uppsala University, BOX 523, 75120, Uppsala, Sweden
| | - Frank Pammer
- Helmholtz Institute Ulm, Karlsruhe Institute for Technology, Helmholtzstrasse 11, 89081, Ulm, Germany
| |
Collapse
|
2
|
Kumar P, Komulainen J, Frontera A, Ward JS, Schalley C, Rissanen K, Puttreddy R. Linear bis-Coordinate Silver(I) and Iodine(I) Complexes with R 3 R 2 R 1 N Tertiary Amines. Chemistry 2023:e202302162. [PMID: 37682579 DOI: 10.1002/chem.202302162] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 09/09/2023]
Abstract
Homoleptic [L-I-L]+ iodine(I) complexes (where L is a R3 R2 R1 N tertiary amine) were synthesized via the [L-Ag-L]+ → [L-I-L]+ cation exchange reaction. In solution, the amines form [R3 R2 R1 N-Ag-NR1 R2 R3 ]+ silver(I) complexes, which crystallize out from solution as the meso-[L-Ag-L]+ complexes, as characterized by X-ray crystallography. The subsequent [L-I-L]+ iodine(I) analogues were extremely reactive and could not be isolated in the solid state. Density functional theory (DFT) calculations were performed to study the Ag+ -N and I+ -N interaction energies in silver(I) and iodine(I) complexes, with the former ranging from -80 to -100 kJ mol-1 and latter from -260 to -279 kJ mol-1 . The X-ray crystal structures revealed Ag+ ⋅⋅⋅Cπ and Ag+ ⋅⋅⋅H-C short contacts between the silver(I) cation and flexible N-alkyl/N-aryl groups, which are the first of their kind in such precursor complexes.
Collapse
Affiliation(s)
- Parveen Kumar
- Department of chemistry, University of Jyvaskyla, P.O. BOX 35, FI-40014, Jyväskylä, Finland
| | - Joonas Komulainen
- Department of chemistry, University of Jyvaskyla, P.O. BOX 35, FI-40014, Jyväskylä, Finland
| | - Antonio Frontera
- Department of Chemistry, Universitat de les Illes Balears, Crta de Valldemossa km 7.5, 07122, Palma de Mallorca, Baleares, Spain
| | - Jas S Ward
- Department of chemistry, University of Jyvaskyla, P.O. BOX 35, FI-40014, Jyväskylä, Finland
| | - Christoph Schalley
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 20, 14195, Berlin, Germany
| | - Kari Rissanen
- Department of chemistry, University of Jyvaskyla, P.O. BOX 35, FI-40014, Jyväskylä, Finland
| | - Rakesh Puttreddy
- Department of chemistry, University of Jyvaskyla, P.O. BOX 35, FI-40014, Jyväskylä, Finland
| |
Collapse
|
3
|
Wang J, Ju MY, Chen XM, Chen X. A general method for the synthesis of covalent and ionic amine borane complexes containing trinitromethyl fragments. RSC Adv 2021; 11:9740-9745. [PMID: 35423463 PMCID: PMC8695509 DOI: 10.1039/d1ra00440a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 02/24/2021] [Indexed: 12/24/2022] Open
Abstract
A general approach for the synthesis of covalent and ionic amine borane complexes containing trinitromethyl fragments has been developed through metathesis reactions between amine chloroborane complexes and potassium salt of trinitromethyl (K[C(NO2)3]). Five covalent and ionic trinitromethyl amine borane complexes have been synthesized in good yields with high purity and it is found that the ionic complex, [H2B(NH3)2][C(NO2)3], might be a promising energetic material on the basis of the investigation of its thermal decomposition behaviour. A general approach has been developed through which five covalent and ionic amine borane complexes containing trinitromethyl fragments were synthesized.![]()
Collapse
Affiliation(s)
- Jin Wang
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials
- Henan Normal University
- Xinxiang
- China
| | - Ming-Yue Ju
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials
- Henan Normal University
- Xinxiang
- China
| | - Xi-Meng Chen
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials
- Henan Normal University
- Xinxiang
- China
| | - Xuenian Chen
- School of Chemistry and Chemical Engineering
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials
- Henan Normal University
- Xinxiang
- China
| |
Collapse
|
4
|
Herrera-España AD, Höpfl H, Morales-Rojas H. Boron-Nitrogen Double Tweezers Comprising Arylboronic Esters and Diamines: Self-Assembly in Solution and Adaptability as Hosts for Aromatic Guests in the Solid State. Chempluschem 2020; 85:548-560. [PMID: 32202393 DOI: 10.1002/cplu.201900717] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 12/11/2019] [Indexed: 01/07/2023]
Abstract
The thermodynamic stability of 1 : 1 and 2 : 1 boron-nitrogen (B←N) adducts formed between aromatic boronic esters with mono- and diamines was studied in solution by NMR and UV-vis spectroscopy with association energies (ΔG°) ranging from -11 to -28 kJ mol-1 . The effect of different substituents in the boronic ester, the nature of the diamine linker, and the effect of the solvent was explored. Stable 2 : 1 B←N adducts with diamines such as 1,3-diaminopropane were produced in solutions of hydrogen-bonding acceptor solvents (acetonitrile and ethyl acetate), which can be isolated in the solid state as crystalline solvates, whereas the use of noncoordinating solvents such as 1,2-dichloroethane afforded mainly 1 : 1 B←N adducts. In suitable combinations, aromatic bis-pyridyl diamines produced stable 2 : 1 B←N adducts that were isolated either as solvent-free solids, solvates, or cocrystals. In these crystalline forms, double-tweezer hosts were observed with an exceptional syn/anti conformational guest-adaptability driven by simultaneous donor-acceptor and C-H⋅⋅⋅π interactions in the tweezer cavities, resembling preorganized covalent tweezer hosts. Interestingly, cocrystals with electron-rich guests such as tetrathiafulvalene and pyrene showed non-centrosymmetric crystal lattices with infinite π-stacked donor-acceptor columns.
Collapse
Affiliation(s)
- Angel D Herrera-España
- Centro de Investigaciones Químicas Instituto de Investigación en Ciencias Básicas y Aplicadas (IICBA), Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico
| | - Herbert Höpfl
- Centro de Investigaciones Químicas Instituto de Investigación en Ciencias Básicas y Aplicadas (IICBA), Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico
| | - Hugo Morales-Rojas
- Centro de Investigaciones Químicas Instituto de Investigación en Ciencias Básicas y Aplicadas (IICBA), Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico
| |
Collapse
|
5
|
Koch R, Sun Y, Orthaber A, Pierik AJ, Pammer F. Turn-on fluorescence sensors based on dynamic intramolecular N→B-coordination. Org Chem Front 2020. [DOI: 10.1039/d0qo00267d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A series of ten aryl-triazole-functionalized boranes bearing BMes2-groups and capable of forming intramolecular five-membered N→B-coordinated heterocycles, has been prepared by 1,3-dipolar cycloaddition.
Collapse
Affiliation(s)
- Raphael Koch
- Institute of Organic Chemistry II and Advanced Materials
- University of Ulm
- 89081 Ulm
- Germany
| | - Yu Sun
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - Andreas Orthaber
- Department of Chemistry – Ångström laboratories
- Uppsala University
- 75120 Uppsala
- Sweden
| | - Antonio J. Pierik
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - Frank Pammer
- Institute of Organic Chemistry II and Advanced Materials
- University of Ulm
- 89081 Ulm
- Germany
| |
Collapse
|
6
|
Andresini M, De Angelis S, Uricchio A, Visaggio A, Romanazzi G, Ciriaco F, Corriero N, Degennaro L, Luisi R. Azetidine-Borane Complexes: Synthesis, Reactivity, and Stereoselective Functionalization. J Org Chem 2018; 83:10221-10230. [PMID: 30024756 DOI: 10.1021/acs.joc.8b01441] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The present study reports, for the first time, the synthesis and structural features of azetidine-borane complexes, as well as their reactivity in lithiation reactions. A temperature-dependent stereoselectivity has been disclosed in the reaction of borane with N-alkyl-2-arylazetidines, allowing for a stereoselective preparation of azetidine-borane complexes 2 and 3. A regioselective hydrogen/lithium permutation, at the benzylic position, was observed in lithiation reactions of complexes possessing a syn relationship, between the ring proton and the BH3 group. In contrast, scarce or no reactivity was noticed in complexes lacking such a stereochemical requirement. The configurational stability of the lithiated intermediates has also been investigated, in order to shed some light on the stereoselectivity of the lithiation/electrophile trapping sequence. Calculations helped in supporting experimental observations, concerning structure and reactivity of these azetidine-borane complexes. Data suggest that the BH3 group could promote the lithiation reaction likely by an electrostatic complex induced proximity effect. Interestingly, a new synthetic strategy for the synthesis of N-alkyl-2,2-disubstituted azetidines has been developed.
Collapse
Affiliation(s)
- Michael Andresini
- Department of Pharmacy-Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Sonia De Angelis
- Department of Pharmacy-Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Antonella Uricchio
- Department of Pharmacy-Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Angelica Visaggio
- Department of Pharmacy-Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | | | - Fulvio Ciriaco
- Department of Chemistry , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Nicola Corriero
- Institute of Crystallography, CNR , Via Amendola 122/O , Bari 70125 , Italy
| | - Leonardo Degennaro
- Department of Pharmacy-Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Renzo Luisi
- Department of Pharmacy-Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| |
Collapse
|
7
|
Liu X, Li Z, Xu H, Zhan Y, Ma P, Chen H, Jiang B. Tris(2-carboxyethyl)phosphine promotes hydrolysis of iminoboronates. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.06.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
8
|
Ma R, Zhang C, Liu Y, Li C, Xu Y, Li B, Zhang Y, An Y, Shi L. Iminoboronate-based dual-responsive micelles via subcomponent self-assembly for hydrophilic 1,2-diol-containing drug delivery. RSC Adv 2017. [DOI: 10.1039/c7ra01742a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Iminoboronate-based dual-responsive micelles were fabricated via simple subcomponent self-assembly for delivery of hydrophilic 1,2-diol-containing drugs.
Collapse
Affiliation(s)
- Rujiang Ma
- State Key Laboratory of Medicinal Chemical Biology
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
| | - Chuan Zhang
- State Key Laboratory of Medicinal Chemical Biology
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
| | - Yong Liu
- State Key Laboratory of Medicinal Chemical Biology
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
| | - Chang Li
- State Key Laboratory of Medicinal Chemical Biology
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
| | - Yanling Xu
- Department of Biological Pharmacy
- College of Basic Science
- Tianjin Agricultural University
- Tianjin 300384
- China
| | - Baoxin Li
- Endocrinology Department
- Baoding First Central Hospital
- Baoding
- China
| | - Yunliang Zhang
- Endocrinology Department
- Baoding First Central Hospital
- Baoding
- China
| | - Yingli An
- State Key Laboratory of Medicinal Chemical Biology
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
| | - Linqi Shi
- State Key Laboratory of Medicinal Chemical Biology
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin 300071
| |
Collapse
|
9
|
Chen ZJ, Tian Z, Kallio K, Oleson AL, Ji A, Borchardt D, Jiang DE, Remington SJ, Ai HW. The N-B Interaction through a Water Bridge: Understanding the Chemoselectivity of a Fluorescent Protein Based Probe for Peroxynitrite. J Am Chem Soc 2016; 138:4900-7. [PMID: 27019313 PMCID: PMC4958459 DOI: 10.1021/jacs.6b01285] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Boronic acid and esters have been extensively utilized for molecular recognition and chemical sensing. We recently reported a genetically encoded peroxynitrite (ONOO(-))-specific fluorescent sensor, pnGFP, based on the incorporation of a boronic acid moiety into a circularly permuted green fluorescent protein (cpGFP) followed by directed protein evolution. Different from typical arylboronic acids and esters, the chromophore of pnGFP is unreactive to millimolar concentrations of hydrogen peroxide (H2O2). The focus of this study is to explore the mechanism for the observed unusual chemoselectivity of pnGFP toward peroxynitrite over hydrogen peroxide by using site-directed mutagenesis, X-ray crystallography, (11)B NMR, and computational analysis. Our data collectively support that a His residue on the protein scaffold polarizes a water molecule to induce the formation of an sp(3)-hybridized boron in the chromophore, thereby tuning the reactivity of pnGFP with various reactive oxygen and nitrogen species (ROS/RNS). Our study demonstrates the first example of tunable boron chemistry in a folded nonnative protein, which offers wide implications in designing selective chemical probes.
Collapse
Affiliation(s)
- Zhi-jie Chen
- Department of Chemistry, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, United States of America
| | - Ziqi Tian
- Department of Chemistry, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, United States of America
| | - Karen Kallio
- Department of Physics and Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, United States of America
| | - April L Oleson
- Department of Physics and Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, United States of America
| | - Ao Ji
- Department of Chemistry, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, United States of America
| | - Dan Borchardt
- Department of Chemistry, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, United States of America
| | - De-en Jiang
- Department of Chemistry, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, United States of America
| | - S. James Remington
- Department of Physics and Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, United States of America
,Corresponding Authors: ,
| | - Hui-wang Ai
- Department of Chemistry, University of California at Riverside, 501 Big Springs Road, Riverside, CA 92521, United States of America
,Corresponding Authors: ,
| |
Collapse
|
10
|
Karoui H, Ritchie C. Boronic acid and boronic ester containing polyoxometalates. Dalton Trans 2016; 45:18838-18841. [DOI: 10.1039/c6dt04197c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three organoboron functionalized polyoxometalates have been synthesized using Schiff base chemistry including a boronic acid, its methyl ester and its trimethylene glycol ester.
Collapse
Affiliation(s)
- Hedi Karoui
- School of Chemistry
- The University of Melbourne
- Parkville
- Melbourne
- Australia
| | - Chris Ritchie
- School of Chemistry
- The University of Melbourne
- Parkville
- Melbourne
- Australia
| |
Collapse
|
11
|
Cal PMSD, Frade RFM, Cordeiro C, Gois PMP. Reversible Lysine Modification on Proteins by Using Functionalized Boronic Acids. Chemistry 2015; 21:8182-7. [DOI: 10.1002/chem.201500127] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Indexed: 11/12/2022]
|
12
|
Zenzola M, Degennaro L, Trinchera P, Carroccia L, Giovine A, Romanazzi G, Mastrorilli P, Rizzi R, Pisano L, Luisi R. Harnessing theortho-Directing Ability of the Azetidine Ring for the Regioselective and Exhaustive Functionalization of Arenes. Chemistry 2014; 20:12190-200. [DOI: 10.1002/chem.201403141] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Indexed: 11/07/2022]
|
13
|
Rao YL, Kusamoto T, Sakamoto R, Nishihara H, Wang S. Reactivity and Electronic Properties of a Ferrocene Molecule Bearing an N,C-Chelated BMes2 Unit. Organometallics 2014. [DOI: 10.1021/om500138f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Ying-Li Rao
- Department of Chemistry, Queen’s University, Kingston, Ontario K7M 3N6, Canada
| | - Tetsuro Kusamoto
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryota Sakamoto
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Suning Wang
- Department of Chemistry, Queen’s University, Kingston, Ontario K7M 3N6, Canada
| |
Collapse
|
14
|
Cal PMSD, Frade RFM, Chudasama V, Cordeiro C, Caddick S, Gois PMP. Targeting cancer cells with folic acid–iminoboronate fluorescent conjugates. Chem Commun (Camb) 2014; 50:5261-3. [DOI: 10.1039/c3cc47534d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Harlow GP, Zakharov LN, Wu G, Liu SY. Thermodynamically Controlled, Dynamic Binding of Diols to a 1,2-BN Cyclohexane Derivative. Organometallics 2013; 32:6650-6653. [PMID: 25798022 DOI: 10.1021/om400697r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reversible covalent binding of diols to an N-Bn 1,2-BN cyclohexane has been studied by 11B and 1H NMR spectroscopy and single-crystal X-ray diffraction analysis. The activation barrier for the reversible B-N Lewis acid-base interaction has been measured by variable-temperature NMR with bound (2R,3R)-(-)-2,3-butanediol (Tc = -40 °C, ΔG‡ = 11.2 ± 0.2 kcal mol-1). Deuterium labeling experiments demonstrate that ligand exchange is reversible and rapid at room temperature, and competitive binding studies establish diol association as a thermodynamically controlled process.
Collapse
Affiliation(s)
- Gregory P Harlow
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403-1253, United States
| | - Lev N Zakharov
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403-1253, United States
| | - Gang Wu
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Shih-Yuan Liu
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403-1253, United States
| |
Collapse
|
16
|
Hough AJ, Prokes I, Tucker JHR, Shipman M, Walsh TR. Photochemical control of molecular motion associated with pyramidal inversion. Chem Commun (Camb) 2013; 49:6683-5. [DOI: 10.1039/c3cc43036g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|