101
|
Kang YS, Son JH, Hwang IC, Ahn KH. Synthesis of a bis(oxazoline)-N-carboxylate ligand and its Zn(II) complex that shows C–H⋯Cl hydrogen bonding. Polyhedron 2006. [DOI: 10.1016/j.poly.2006.05.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
102
|
Bharathi KS, Rahiman AK, Rajesh K, Sreedaran S, Aravindan P, Velmurugan D, Narayanan V. Synthesis of new ‘end-off’ μ-phenoxo and bis-μ-acetato tri-bridged copper(II), nickel(II) and zinc(II) complexes: Spectral, magnetic, electrochemical and catalytic studies. Polyhedron 2006. [DOI: 10.1016/j.poly.2006.04.022] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
103
|
Novel chiral fluorescent macrocyclic receptors: synthesis and recognition for amino acid anions. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.07.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
104
|
Lee SJ, Sung HR, Son JH, Ramesh R, Ahn KH. Synthesis of a homochiral carboxylate-containing tetradentate ligand and its Co(III) complex. INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.02.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
105
|
Reeve TB, Cros JP, Gennari C, Piarulli U, de Vries JG. A Practical Approach to the Resolution of RacemicN-Benzyl α-Amino Acids by Liquid–Liquid Extraction with a Lipophilic Chiral Salen–Cobalt(III) Complex. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200504116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
106
|
Reeve TB, Cros JP, Gennari C, Piarulli U, de Vries JG. A Practical Approach to the Resolution of RacemicN-Benzyl α-Amino Acids by Liquid–Liquid Extraction with a Lipophilic Chiral Salen–Cobalt(III) Complex. Angew Chem Int Ed Engl 2006; 45:2449-53. [PMID: 16528764 DOI: 10.1002/anie.200504116] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Toby B Reeve
- Dipartimento di Chimica Organica e Industriale, Centro di Eccellenza C.I.S.I. Università degli Studi di Milano, Istituto di Scienze e Tecnologie Molecolari (ISTM) del CNR, Via G. Venezian, 21, 20133 Milano, Italy
| | | | | | | | | |
Collapse
|
107
|
Zang S, Su Y, Li Y, Zhu H, Meng Q. One Dense and Two Open Chiral Metal−Organic Frameworks: Crystal Structures and Physical Properties. Inorg Chem 2006; 45:2972-8. [PMID: 16562953 DOI: 10.1021/ic0520418] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three 3D robust homochiral helical coordination polymers, [Cu(2,2',3,3'-H2odpa)(bpy)] (1), {[Ni4(2,2',3,3'-odpa)2(bpy)4(H2O)4].(H2O)16} (2), and {[Co4(2,2',3,3'-odpa)2(bpy)4(H2O)4].(H2O)14} (3), have been hydrothermally synthesized from a flexible ligand of 2,2',3,3'-odpda (2,2',3,3'-oxydiphthalic dianhydride). Compound 1 crystallized in space group P3(1)21 and has a rare chiral dense qzd 7.(5)9 topology that incorporates single helical substructures with the same accessibility, whereas compounds 2 and 3 crystallized in the space group C2 and possessed isostructural 3D chiral open frameworks based on the homochiral 2D sheets and 4,4'-bpy pillars. TGA and PXRD analyses show that the porous framework of 2 is stable after the removal of solvent water molecules. In contrast, 3 changed its structure to an amorphous one because of the simultaneous loss of solvent and coordination water molecules. 1 is nearly paramagnetic, whereas weak ferromagnetic interactions between M(II) (M = Ni, Co) ions have been found in 2 and 3.
Collapse
Affiliation(s)
- Shuangquan Zang
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China
| | | | | | | | | |
Collapse
|
108
|
Chiral 3D Architectures with Helical Channels Constructed from Polyoxometalate Clusters and Copper–Amino Acid Complexes. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200503657] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
109
|
An HY, Wang EB, Xiao DR, Li YG, Su ZM, Xu L. Chiral 3D Architectures with Helical Channels Constructed from Polyoxometalate Clusters and Copper–Amino Acid Complexes. Angew Chem Int Ed Engl 2006; 45:904-8. [PMID: 16385595 DOI: 10.1002/anie.200503657] [Citation(s) in RCA: 551] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hai-Yan An
- Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun, China
| | | | | | | | | | | |
Collapse
|
110
|
Kim HJ, Kim W, Lough AJ, Kim BM, Chin J. A Cobalt(III)−Salen Complex with an Axial Substituent in the Diamine Backbone: Stereoselective Recognition of Amino Alcohols. J Am Chem Soc 2005; 127:16776-7. [PMID: 16316210 DOI: 10.1021/ja0557785] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cobalt(III)-salen complex (3) with an axial substituent on the diamine backbone has been synthesized. Crystal structure reveals that the axial substituent (p-nitrophenyl group) is positioned in close proximity to the metal binding site. The stereoselectivity of the cobalt complex for binding amino alcohols increases with increasing steric bulk of the amino alcohol from alaninol (2.9) to valinol (6.2) and t-leucinol (36.0).
Collapse
Affiliation(s)
- Hae-Jo Kim
- Department of Chemistry, University of Toronto, Canada
| | | | | | | | | |
Collapse
|
111
|
Wen HR, Wang CF, Song Y, Zuo JL, You XZ. One-Dimensional Azido-Bridged Chiral Metal Complexes with Ferromagnetic or Antiferromagnetic Interactions: Syntheses, Structures, and Magnetic Studies. Inorg Chem 2005; 44:9039-45. [PMID: 16296859 DOI: 10.1021/ic051108o] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
One-dimensional chiral copper(II) and manganese(II) coordination polymers with single asymmetric end-to-end (EE) azide bridges, [Cu(R-L)2(N3)]n(ClO4)n (1), [Cu(S-L)2 (N3)]n(ClO4)n (2), [Mn(R-L)2(N3)]n(ClO4)n (3), and [Mn(S-L)2(N3)]n(ClO4)n (4) (R-L or S-L = R- or S-pyridine-2-carbaldehyde-imine), have been synthesized, using azide ions as bridging groups and chiral Schiff bases as auxiliary ligands, and characterized. The crystal structure determination of complexes 1 and 2 reveals the formation of one-dimensional chiral chains, in which the central Cu(II) ion is six-coordinate in the form of an elongated octahedron. Complex 3 consists of chiral helical polymeric chains, in which the central Mn(II) has a slightly distorted octahedral geometry. They all crystallize in the chiral space group P2(1). Complexes 1 and 2 are rare examples that exhibit ferromagnetic interaction between copper(II) ions through the single end-to-end azido bridge. Fitting the susceptibility data for 1 using a 1D uniform chain model led to the parameters J = 0.70(3) cm(-1), g = 2.06(2), and zj' = 0.07(2) cm(-1). The magnetic studies on 3 and 4 show that there is weak antiferromagnetic coupling between the manganese(II) ions.
Collapse
Affiliation(s)
- He-Rui Wen
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, PR China
| | | | | | | | | |
Collapse
|
112
|
Folmer-Andersen JF, Lynch VM, Anslyn EV. “Naked-Eye” Detection of Histidine by Regulation of CuII Coordination Modes. Chemistry 2005; 11:5319-26. [PMID: 16003820 DOI: 10.1002/chem.200500016] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The association of various alpha-amino acids with four new, coordinatively unsaturated metal complexes ([Cu(5)]2+, [Cu(6)]2+, [Cu(7)]2+, and [Zn(8)]2+) was examined. The receptors [Cu(5)]2+ and [Cu(7)]2+ were found to discriminate histidine (His) from other zwitterionic alpha-amino acids by means of indicator-displacement assays (IDAs) using 5(6)-carboxyfluorescein as an indicator in buffered methanol/water (3:1) solvent. The colorimetric detection of His was achieved by using this IDA method, which appears to owe its selectivity to a unique process involving disruption of the host complex to form a 2:1 His/Cu(II) complex rather than simple indicator displacement. The occurrence of distinct intermolecular coordination processes in response to the introduction of a different amino acid is observed. X-ray crystal structures of the host metal complexes were obtained and exhibit the adoption of a variety of coordination geometries about the metal center.
Collapse
Affiliation(s)
- J Frantz Folmer-Andersen
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78701, USA
| | | | | |
Collapse
|
113
|
|
114
|
Krall JA, Rutledge PJ, Baldwin JE. Design and synthesis of an isopenicillin N synthase mimic. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.10.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
115
|
An H, Xiao D, Wang E, Li Y, Xu L. A series of new polyoxoanion-based inorganic-organic hybrids: (C6NO2H5)[(H2O)4(C6NO2H5)Ln(CrMo6H6O24)]·4H2O (Ln = Ce, Pr, La and Nd) with a chiral layer structure. NEW J CHEM 2005. [DOI: 10.1039/b417313a] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
116
|
Hernández JV, Oliva AI, Simón L, Muñiz FM, Grande M, Morán JR. Ternary enantioselective complexes from α-amino acids, 18-crown-6 ether and a macrocyclic xanthone-based receptor. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.04.168] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
117
|
Miyake H, Yoshida K, Sugimoto H, Tsukube H. Dynamic Helicity Inversion by Achiral Anion Stimulus in Synthetic Labile Cobalt(II) Complex. J Am Chem Soc 2004; 126:6524-5. [PMID: 15161259 DOI: 10.1021/ja049130o] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The helical chirality of a Co(II) complex with a chiral tetradentate ligand is completely inverted from Lambda to Delta by the addition of achiral NO3- anion as an external stimulus.
Collapse
Affiliation(s)
- Hiroyuki Miyake
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | | | | | | |
Collapse
|
118
|
Oliva AI, Simón L, Muñiz FM, Sanz F, Morán JR. Urea-tetrahydrobenzoxanthene receptors for carboxylic acids. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.03.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
119
|
Ko YG, Choi US, Park YS, Woo JW. Fourier transform infrared spectroscopy study of the effect of pH on anion and cation adsorption onto poly(acrylo-amidino diethylenediamine). ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20057] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
120
|
Efficient and selective transport of ω-amino acids across a bulk chloroform membrane by a macrocyclic dicopper(II) complex. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.12.125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
121
|
Gao EQ, Yue YF, Bai SQ, He Z, Yan CH. From Achiral Ligands to Chiral Coordination Polymers: Spontaneous Resolution, Weak Ferromagnetism, and Topological Ferrimagnetism. J Am Chem Soc 2004; 126:1419-29. [PMID: 14759200 DOI: 10.1021/ja039104a] [Citation(s) in RCA: 504] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using the achiral diazine ligands bearing two bidentate pyridylimino groups as sources of conformational chirality, five azido-bridged coordination polymers are prepared and characterized crystallographically and magnetically. The chirality of the molecular units is induced by the coordination of the diazine ligands in a twisted chiral conformation. The use of L(1) (1,4-bis(2-pyridyl)-1-amino-2,3-diaza-1,3-butadiene) and L(2) (1,4-bis(2-pyridyl)-1,4-diamino-2,3-diaza-1,3-butadiene) induces spontaneous resolution, yielding conglomerates of chiral compounds [Mn(3)(L(1))(2)(N(3))(6)](n) (1) and [Mn(2)(L(2))(2)(N(3))(3)](n)(ClO(4))(n).nH(2)O (2), respectively, where triangular (1) or double helical (2) chiral units are connected into homochiral one-dimensional (1D) chains via single end-to-end (EE) azido bridges. The chains are stacked via hydrogen bonds in a homochiral fashion to yield chiral crystals. When L(3) (2,5-bis(2-pyridyl)-3,4-diaza-2,4-hexadiene) is employed, a partial spontaneous resolution occurs, where binuclear chiral units are interlinked into fish-scale-like homochiral two-dimensional (2D) layers via single EE azido bridges. The layers are stacked in a heterochiral or homochiral fashion to yield simultaneously a racemic compound, [Mn(2)(L(3))(N(3))(4)](n) (3a), and a conglomerate, [Mn(2)(L(3))(N(3))(4)](n).nMeOH (3b). On the other hand, the ligand without amino and methyl substituents (L(4), 1,4-bis(2-pyridyl)-2,3-diaza-1,3-butadiene) does not induce spontaneous resolution. The resulting compound, [Mn(2)(L(4))(N(3))(4)](n) (4), consists of centrosymmetric 2D layers with alternating single diazine, single EE azido, and double end-on (EO) azido bridges, where the chirality is destroyed by the centrosymmetric double EO bridges. These compounds exhibit very different magnetic behaviors. In particular, 1 behaves as a metamagnet built of homometallic ferrimagnetic chains with a unique "fused-triangles" topology, 2 behaves as a 1D antiferromagnet with alternating antiferromagnetic interactions, 3a and 3b behave as spin-canted weak ferromagnets with different critical temperatures, and 4 also behaves as a spin-canted weak ferromagnet but exhibits two-step magnetic transitions.
Collapse
Affiliation(s)
- En-Qing Gao
- State Key Lab of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Lab in Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, People's Republic of China
| | | | | | | | | |
Collapse
|
122
|
Folmer-Andersen JF, Aït-Haddou H, Lynch VM, Anslyn EV. 2,6-Di(pyrimidin-4-yl)pyridine Ligands with Nitrogen-Containing Auxiliaries: The Formation of Functionalized Molecular Clefts upon Metal Coordination. Inorg Chem 2003; 42:8674-81. [PMID: 14686844 DOI: 10.1021/ic034823b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of ligands (1-4) based on a 2,6-di(pyrimidin-4-yl)pyridine scaffold have been synthesized, and their abilities to form complexes with Zn(II) and Cu(II) have been determined using UV/vis spectroscopy in buffered aqueous solution (0.01 M N-[2-hydroxyethyl]piperazine-N'-[3-ethanesulfonic acid] (HEPES) at pH = 6.8). The Zn(II) complex of 1 was determined to have a formation constant of 8.4 x 10(3) M(-)(1) while the formation constant of the Cu(II) complex was found to be 1 x 10(6) M(-)(1). The presence of auxiliary amines in 2 increased the stability of the Zn(II) complex relative to that of 1 by a factor of over 40, suggesting possible coordination of the auxiliaries to the Zn(II) center. The guanidinium and 2-amino-4,5-dihydro-imidazolinium groups of 3 and 4 considerably diminished the stability of the Zn(II) and Cu(II) complexes relative to those of 1. X-ray crystal structures of 1-Zn, 3-Zn, 4, and 4-Zn were obtained and are discussed. A significant increase in the stability of 3-Zn, but not in the stability 1-Zn, was observed upon the addition of 1 equiv of sodium phosphate, implicating a stabilizing interaction of the guanidinium groups of 3-Zn and the phosphate anion.
Collapse
Affiliation(s)
- J Frantz Folmer-Andersen
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78701, USA
| | | | | | | |
Collapse
|
123
|
Qu ZR, Zhao H, Wang XS, Li YH, Song YM, Liu YJ, Ye Q, Xiong RG, Abrahams BF, Xue ZL, You XZ. Homochiral Zn and Cd Coordination Polymers Containing Amino Acid−Tetrazole Ligands. Inorg Chem 2003; 42:7710-2. [PMID: 14632480 DOI: 10.1021/ic034685q] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactions of (S)-3-cyanophenylalanine with NaN(3) in the presence of H(2)O and Lewis acids (ZnCl(2) and CdCl(2)) afford two unprecedented 3D homochiral networks, mono[(S)-5-(3-tetrazoyl)-phenylalaninato]zinc(II) (1) and mono[(S)-5-(3-tetrazoyl)-phenylalaninato]cadmium(II) monoaqua(II) (2), respectively. The two compounds are isostructural with noninterpenetrated SrAl(2) topology. The structure of these coordination polymers gives new insight into Sharpless' reaction of chiral 5-substituted 1H-tetrazole and homochiral supramolecular array constructions.
Collapse
Affiliation(s)
- Zhi-Rong Qu
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, 210093 Nanjing, P. R. China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
124
|
Xie YR, Wang XS, Zhao H, Zhang J, Weng LH, Duan CY, Xiong RG, You XZ, Xue ZL. Unprecedented Homochiral Olefin−Copper(I) 2D Coordination Polymer Grid Based on Chiral Ammonium Salts as Building Blocks. Organometallics 2003. [DOI: 10.1021/om034077i] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong-Rong Xie
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Xi-Sen Wang
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Hong Zhao
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Jing Zhang
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Ling-Hong Weng
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Cun-Ying Duan
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Ren-Gen Xiong
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Xiao-Zeng You
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Zi-Ling Xue
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| |
Collapse
|
125
|
Jitsukawa K, Katoh A, Funato K, Ohata N, Funahashi Y, Ozawa T, Masuda H. Kinetic Resolution of rac-Phenylalanine by Stereoselective Complexation to a Chiral Cobalt Complex through π−π Stacking Interaction. Inorg Chem 2003; 42:6163-5. [PMID: 14514289 DOI: 10.1021/ic030135g] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cobalt(III) complex with chiral ligand, H2cpel (N-carboxymethyl-N-pyridylethyl-l-leucine), was prepared for chiral recognition of amino acids. Through the competitive coordination of racemic phenylalanine to the chiral cobalt complex, [Co(cpel)(CO(3))](-) (1), enantioselective recognition was achieved on the ternary complex, which was determined on the basis of HPLC analysis with a chiral column. The formation rate for the [Co(cpel)(l-phe)] complex (2) was 6-times superior to that of [Co(cpel)(d-phe)] (3). The preferential formation of 2 might be illustrated by the interligand pi-pi stacking interaction. Crystal structural analysis for 2 and 3 revealed that aromatic rings, pyridine ring of CPEL and phenylalanine sidechain, in 2 were very close each other but those in 3 were far apart. Such interligand aromatic interaction in 2 was also examined by the use of (1)H NMR spectra.
Collapse
Affiliation(s)
- Koichiro Jitsukawa
- Department of Applied Chemistry, Nagoya Institute of Technology, Gokiso-cho Showa-ku, Nagoya 466-8555, Japan.
| | | | | | | | | | | | | |
Collapse
|
126
|
Bandyopadhyay I, Lee HM, Tarakeshwar P, Cui C, Oh KS, Chin J, Kim KS. Highly stereospecific epimerization of alpha-amino acids: conducted tour mechanism. J Org Chem 2003; 68:6571-5. [PMID: 12919017 DOI: 10.1021/jo034130c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The highly stereospecific and regiospecific recognition of alpha-amino acids exhibited by a novel Co(III) metal complex embodied in the experimental work (Nature 1999, 401, 254) is rationalized from the energetics and structural characteristics with the use of density functional calculations. The steric repulsion between the chiral center of the receptor [Co(III) complex] and alanine has been a cause for the discrimination of complex stabilities. The energies evaluated for all possible alanine binding modes clearly reveal regiospecificity. Our main emphasis is laid on the base-catalyzed epimerization reaction that drives the stereospecific recognition to near completion. The conducted tour mechanism is found to be the most likely candidate. A similar role by the equivalent Zn(II) complex is found.
Collapse
Affiliation(s)
- Indrajit Bandyopadhyay
- National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyojadong, Pohang 790-784, Korea
| | | | | | | | | | | | | |
Collapse
|
127
|
Breccia P, Van Gool M, Pérez-Fernández R, Martín-Santamaría S, Gago F, Prados P, de Mendoza J. Guanidinium receptors as enantioselective amino acid membrane carriers. J Am Chem Soc 2003; 125:8270-84. [PMID: 12837099 DOI: 10.1021/ja026860s] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A number of artificial carriers for the transport of zwitterionic aromatic amino acids across bulk model membranes (U-tube type) have been prepared and evaluated. 1,2-Dichloroethane and dichloromethane were employed in the organic phase. All compounds are based on a bicyclic chiral guanidinium scaffold that ideally complements the carboxylate function. The guanidinium central moiety was attached to crown ethers or lasalocid A as specific subunits for ammonium recognition as well as to aromatic or hydrophobic residues to evaluate their potential interaction with the side chains of the guest amino acids. The subunits were linked to the guanidinium through ester or amide connectors. Amides were found to be better carriers than esters, though less enantioselective. On the other hand, crown ethers were superior to lasalocid derivatives. As expected, transport rates were dependent on the carrier concentration in the liquid membrane. Reciprocally, enantioselectivities were much higher at lower carrier concentrations. The results show that our previously proposed three-point binding model (J. Am. Chem. Soc. 1992, 114, 1511-1512), involving the participation of the aromatic or hydrophobic residue to interact with the side chains of the amino acid guest, is unnecessary to explain the high enantioselectivities observed. Molecular dynamics fully support a two-point model involving only the guanidinium and crown ether moieties. These molecules constitute the first examples of chiral selectors for underivatized amino acids acting as carriers under neutral conditions.
Collapse
Affiliation(s)
- Perla Breccia
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | | | | | | | | | | | | |
Collapse
|
128
|
Qu ZR, Chen ZF, Zhang J, Xiong RG, Abrahams BF, Xue ZL. The First Highly Stable Homochiral Olefin−Copper(I) 2D Coordination Polymer Grid Based on Quinine as a Building Block. Organometallics 2003. [DOI: 10.1021/om030134w] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhi-Rong Qu
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, School of Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Zhen-Feng Chen
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, School of Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Jing Zhang
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, School of Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Ren-Gen Xiong
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, School of Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Brendan F. Abrahams
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, School of Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| | - Zi-Ling Xue
- Coordination Chemistry Institute, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China, School of Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996
| |
Collapse
|
129
|
Qin C, Xu L, Wei Y, Wang X, Li F. New vanadium phosphate ([(phen)VIVO]2(VV2O5)(HPO4))n with chiral layer architecture. Inorg Chem 2003; 42:3107-10. [PMID: 12716208 DOI: 10.1021/ic026256i] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new layered vanadium phosphate ([(phen)V(IV)O](2)(V(V)(2)O(5))(HPO(4))n has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, and single-crystal X-ray diffraction. This compound crystallized in the monoclinic space group P2/c with a = 9.979(2) A, b = 9.886(2) A, c = 15.298(3) A, beta = 102.86(3) degrees, V = 1471.3(5) A(3), and Z = 4. In the structure of this compound, two nitrogen atoms of 1,10-phen are directly coordinated to the vanadium skeleton. Interestingly, the crystal structure consists of two types of chiral layers, one left-handed and the other right-handed, which lead to a racemic solid-state compound. In each layer, there coexist three distinct rings, described as a 8-membered ring [V(2)(oct)P(2)O(4)], 12-membered ring [V(2)(omicron)(ct)V(2)(tet)P(2)O(6)], and 16-membered ring [V(2)(omicron)(ct)V(4)(tet)P(2)O(8)].
Collapse
Affiliation(s)
- Chao Qin
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | | | | | | | | |
Collapse
|
130
|
Gao J, Martell A, Reibenspies J. Molecular Recognition of an Amino Acid by a Novel Macrocyclic Monoxo-tetraamine and Its ZnII Complex. Helv Chim Acta 2003. [DOI: 10.1002/hlca.200390011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
131
|
Chin J, Chung S, Kim DH. Synergistic effect between metal coordination and hydrogen bonding in phosphate and halide recognition. J Am Chem Soc 2002; 124:10948-9. [PMID: 12224920 DOI: 10.1021/ja026920u] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The equilibrium constant for binding of dimethyl phosphate to a Co(III) complex in water increases from 6.2 to 210 M-1 upon addition of a single hydrogen bond between the bound phosphate and the metal complex. Crystal structure reveals that the hydrogen bond distance is 1.96 A. The synergistic effect between metal coordination and hydrogen bonding can also be observed for fluoride binding but not for bromide binding.
Collapse
Affiliation(s)
- Jik Chin
- Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario, Canada M5S 3H6.
| | | | | |
Collapse
|
132
|
Abstract
Complex of an anti-cocaine aptamer and the dye diethylthiotricarbocyanine behaves as a colorimetric sensor with attenuation in absorbance at 760 nm for cocaine in the concentration range of 2-600 muM. Mechanistic studies indicate an intermolecular displacement of the dye as the mechanism of action of the sensor. As the dye is insoluble in buffer, cocaine binding can be followed with the unaided eye as displaced dye precipitates and supernatant decolorizes.
Collapse
Affiliation(s)
- Milan N Stojanovic
- Division of Clinical Pharmacology and Experimental Therapeutics, Department of Medicine, Columbia University, Box 84, 630 West 168th Street, New York, New York 10032, USA.
| | | |
Collapse
|
133
|
Xie YR, Xiong RG, Xue X, Chen XT, Xue Z, You XZ. Two chiral coordination polymers: preparation and X-ray structures of mono(4-sulfo-L-phenylalanine)(diaqua) zinc(II) and copper(II) complexes. Inorg Chem 2002; 41:3323-6. [PMID: 12055012 DOI: 10.1021/ic010862g] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yong-Rong Xie
- Coordination Chemistry Institute and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, P.R. China
| | | | | | | | | | | |
Collapse
|
134
|
Yashiro M. Catalytic and Selective Conversion of Glycine into Serine by the Reaction with Formaldehyde in a Neutral Aqueous Solution. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.1383] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
135
|
Bobb R, Alhakimi G, Studniki L, Lough A, Chin J. Stereoselective recognition of an aziridine with a Co(III) complex: a potential transition-state analogue for catalytic epoxidation. J Am Chem Soc 2002; 124:4544-5. [PMID: 11971685 DOI: 10.1021/ja017418x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reversible and stereoselective coordination of 1-(R)-phenyl-2-(S)-methylaziridine to (S,S)L-Co(III) and (R,R)L-Co(III) (where L represents a salen ligand obtained from diamino cyclohexane and 2,4-di-tert-butyl salicylaldehyde) has been investigated. 1H NMR data indicate that the aziridine binds about three times more tightly to (S,S)L-Co(III) than to (R,R)L-Co(III). Crystal structures of two molecules of the aziridine coordinated to the Co(III) complexes have been determined. These structures together with molecular mechanics computation provide insight into the origin of stereoselective recognition of the aziridine to the Co(III) complexes.
Collapse
Affiliation(s)
- Rhiana Bobb
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | | | | | | | | |
Collapse
|
136
|
Kim BM, So SM, Choi HJ. A concise, modular synthesis of chiral peraza-macrocycles using chiral aziridines. Org Lett 2002; 4:949-52. [PMID: 11893193 DOI: 10.1021/ol025513k] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Novel chiral peraza-macrocycles were synthesized from chiral aziridines as a common building block. Efficient syntheses of chiral [26]-N(6), [12]-N(4), [9]-N(3), and [14]-N(4) systems were accomplished.
Collapse
Affiliation(s)
- B Moon Kim
- Center for Molecular Catalysis, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-747, Korea.
| | | | | |
Collapse
|
137
|
Liu TJ, Chen YJ, Zhang KS, Wang D, Guo DW, Yang XZ. Enantiomeric recognition of chiral 3,3-bridged-1,1'-binaphthol dimer toward alpha-phenylethylamine and alpha-amino acid ester. Chirality 2002; 13:595-600. [PMID: 11579455 DOI: 10.1002/chir.1183] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The 1,1'-binaphthol-based dimers with p-phenylenebis(2-ethynyl) spacer, (+)-6 and (+)-2, were synthesized as chiral host compounds. (1)H NMR, UV-vis, and fluorescent titration were used to evaluate the enantiomeric recognition abilities of the chiral host dimers toward the guest amine 7 and alpha-amino acid ester 8. The chiral BINOL-based dimers were found to have good enantiomeric recognition ability. The computer simulation of the host-guest complex molecules was carried out to describe the conformational changes of both naphthyl ring in the molecule of chiral host dimer after complexation with the guest molecule.
Collapse
Affiliation(s)
- T J Liu
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P.R. China
| | | | | | | | | | | |
Collapse
|
138
|
|
139
|
Saito MA, Maeda K, Onouchi H, Yashima E. Synthesis and Macromolecular Helicity Induction of a Stereoregular Polyacetylene Bearing a Carboxy Group with Natural Amino Acids in Water. Macromolecules 2000. [DOI: 10.1021/ma000484j] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mitsuo Albert Saito
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University and Form and Function, PRESTO, JST, Chikusa-ku, Nagoya 464-8603, Japan
| | - Katsuhiro Maeda
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University and Form and Function, PRESTO, JST, Chikusa-ku, Nagoya 464-8603, Japan
| | - Hisanari Onouchi
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University and Form and Function, PRESTO, JST, Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University and Form and Function, PRESTO, JST, Chikusa-ku, Nagoya 464-8603, Japan
| |
Collapse
|