1
|
Chang KM, Wu SS, Yhn SL, Wang YF. Two New Resolution Processes for the Preparation of (+)-S-2-(6-Methoxy-2-Naphthyl)Propionic Acid (d-Naproxen). J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.199000079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
2
|
Li Y, Ma Y, Lu Z, Wang L, Ren X, Sun Z. Stereoselective tribromomethylation of N-(tert-butanesulfinyl)imines with bromoform: practical synthesis of α-tribromomethyl amines. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.100] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
3
|
Cismaş C, Vanthuyne N, Rispaud H, Varga RA, Bogdan E, Roussel C, Grosu I. Geometric enantiomerism in cyclic compounds: chiral dibrominated 1,3-dioxanes. Chirality 2010; 23:167-71. [PMID: 20872855 DOI: 10.1002/chir.20895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Accepted: 06/08/2010] [Indexed: 11/07/2022]
Abstract
The first geometric enantiomers in the cyclic compounds series are reported. The investigated compounds are 2,2-disubstituted-5-methyl-1,3-dioxane derivatives in which the substituents at position 2 bear chiral centers with identical substituents but with opposite configurations. The structure of the unlike isomers was determined from the solid state molecular structure of the compounds obtained by single crystal X-ray diffractometry and the enantiomers of these diastereoisomers were observed by chiral column HPLC base-line separation. The investigated compounds were obtained by a diastereoselective bromination reaction of the corresponding 2,2-dialkyl and 2,2-dibenzyl-5-methyl-1,3-dioxanes.
Collapse
Affiliation(s)
- Crina Cismaş
- Faculty of Chemistry and Chemical Engineering, Center of Supramolecular Organic and Organometallic Chemistry, Babes-Bolyai University, Cluj-Napoca, Romania
| | | | | | | | | | | | | |
Collapse
|
4
|
Matsuo T, Ito K, Kanehisa N, Hayashi T. A Structural Isomer of Nonaromatic Porphyrin: Preparation of 20π-Conjugated Porphycene Based on Electronic Perturbation. Org Lett 2007; 9:5303-6. [DOI: 10.1021/ol7025087] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takashi Matsuo
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kazuyuki Ito
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Nobuko Kanehisa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takashi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| |
Collapse
|
5
|
Matsuo T, Murata D, Hisaeda Y, Hori H, Hayashi T. Porphyrinoid Chemistry in Hemoprotein Matrix: Detection and Reactivities of Iron(IV)-Oxo Species of Porphycene Incorporated into Horseradish Peroxidase. J Am Chem Soc 2007; 129:12906-7. [DOI: 10.1021/ja074685f] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takashi Matsuo
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan, and Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Dai Murata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan, and Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Yoshio Hisaeda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan, and Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hiroshi Hori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan, and Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Takashi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan, and Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
6
|
Arnbjerg J, Jiménez-Banzo A, Paterson MJ, Nonell S, Borrell JI, Christiansen O, Ogilby PR. Two-Photon Absorption in Tetraphenylporphycenes: Are Porphycenes Better Candidates than Porphyrins for Providing Optimal Optical Properties for Two-Photon Photodynamic Therapy? J Am Chem Soc 2007; 129:5188-99. [PMID: 17397157 DOI: 10.1021/ja0688777] [Citation(s) in RCA: 173] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Porphycenes are structural isomers of porphyrins that have many unique properties and features. In the present work, the resonant two-photon absorption of 2,7,12,17-tetraphenylporphycene (TPPo) and its palladium(II) complex (PdTPPo) has been investigated. The data obtained are compared to those from the isomeric compound, meso-tetraphenylporphyrin (TPP). Detection of phosphorescence from singlet molecular oxygen, O2(a(1)Delta(g)), produced upon irradiation of these compounds, was used to obtain two-photon excitation spectra and to quantify two-photon absorption cross sections, delta. In the spectral region of 750-850 nm, the two-photon absorption cross sections at the band maxima for both TPPo and PdTPPo, delta = 2280 and 1750 GM, respectively, are significantly larger than that for TPP. This difference is attributed to the phenomenon of so-called resonance enhancement; for the porphycenes, the two-photon transition is nearly resonant with a comparatively intense one-photon Q-band transition. The results of quantum mechanical calculations using density functional quadratic response theory are in excellent agreement with the experimental data and, as such, demonstrate that comparatively high-level quantum chemical methods can be used to interpret and predict nonlinear optical properties from such large molecular systems. One important point realized through these experiments and calculations is that one must exercise caution when using qualitative molecular-symmetry-derived arguments to predict the expected spectral relationship between allowed one- and two-photon transitions. From a practical perspective, this study establishes that, in comparison to porphyrins and other tetrapyrrolic macrocyclic systems, porphycenes exhibit many desirable attributes for use as sensitizers in two-photon initiated photodynamic therapy.
Collapse
Affiliation(s)
- Jacob Arnbjerg
- Department of Chemistry, University of Aarhus, DK-8000 Arhus, Denmark
| | | | | | | | | | | | | |
Collapse
|
7
|
Hayashi T, Murata D, Makino M, Sugimoto H, Matsuo T, Sato H, Shiro Y, Hisaeda Y. Crystal structure and peroxidase activity of myoglobin reconstituted with iron porphycene. Inorg Chem 2007; 45:10530-6. [PMID: 17173408 DOI: 10.1021/ic061130x] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The incorporation of an artificially created metal complex into an apomyoglobin is one of the attractive methods in a series of hemoprotein modifications. Single crystals of sperm whale myoglobin reconstituted with 13,16-dicarboxyethyl-2,7-diethyl-3,6,12,17-tetramethylporphycenatoiron(III) were obtained in the imidazole buffer, and the 3D structure with a 2.25-A resolution indicates that the iron porphycene, a structural isomer of hemin, is located in the normal position of the heme pocket. Furthermore, it was found that the reconstituted myoglobin catalyzed the H2O2-dependent oxidations of substrates such as guaiacol, thioanisole, and styrene. At pH 7.0 and 20 degrees C, the initial rate of the guaiacol oxidation is 11-fold faster than that observed for the native myoglobin. Moreover, the stopped-flow analysis of the reaction of the reconstituted protein with H2O2 suggested the formation of two reaction intermediates, compounds II- and III-like species, in the absence of a substrate. It is a rare example that compound III is formed via compound II in myoglobin chemistry. The enhancement of the peroxidase activity and the formation of the stable compound III in myoglobin with iron porphycene mainly arise from the strong coordination of the Fe-His93 bond.
Collapse
Affiliation(s)
- Takashi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Abstract
Owing to short distances between the inner nitrogen atoms and, therefore, strong intramolecular hydrogen bonds, porphycenes display completely different tautomeric properties than porphyrins, their constitutional isomers. Tunneling splitting caused by delocalization of two inner hydrogen atoms is observed for porphycenes isolated in supersonic jets. The barrier to tautomerization is higher in the lowest excited singlet state than in the ground state. Still, rapid exchange of inner hydrogen atoms is detected in S1. The mechanism of tautomerization involves synchronous double hydrogen tunneling, activated by excitation of a low-frequency mode, which modulates the NH...N separation. This separation can also be strongly altered by peripheral substitution. In porphycenes with alkyl substituents on the ethylene bridges, the NH...N distances become extremely small. For these derivatives, both trans and cis tautomeric forms are detected. Tautomerism in porphycenes was also monitored on a single-molecule level.
Collapse
Affiliation(s)
- Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland.
| |
Collapse
|
9
|
Neya S, Imai K, Hiramatsu Y, Kitagawa T, Hoshino T, Hata M, Funasaki N. Significance of the Molecular Shape of Iron Corrphycene in a Protein Pocket. Inorg Chem 2006; 45:4238-42. [PMID: 16676986 DOI: 10.1021/ic0600679] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The iron complex of a new type of corrphycene bearing two ethoxycarbonyl (-CO2C2H5) groups on the bipyrrole moiety was introduced into apomyoglobin. The reconstituted ferric myoglobin has a coordinating water molecule that deprotonates to hydroxide with a pK(a) value of 7.3 and exhibits 3-10-fold higher affinities for anionic ligands when compared with a counterpart myoglobin with the same substituents on the dipyrroethene moiety. In the ferrous state, the oxygen affinity of the new myoglobin was decreased to 1/410 of the native protein. The anomalies in the ligand binding, notably dependent on the side-chain location, were interpreted in terms of a characteristic core shape of corrphycene that produces the longer and shorter Fe-N(pyrrole) bonds. The spin-state equilibrium analysis of the ferric azide myoglobin containing the new iron corrphycene supported the nonequivalence of the Fe-N(pyrrole) bonds. These results demonstrate that the trapezoidal molecular shape of corrphycene exerts functional significance when the iron complex is placed in a protein pocket.
Collapse
Affiliation(s)
- Saburo Neya
- Department of Physical Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, Inage-Yayoi, Chiba 263-8522, Japan.
| | | | | | | | | | | | | |
Collapse
|
10
|
Matsuo T, Dejima H, Hirota S, Murata D, Sato H, Ikegami T, Hori H, Hisaeda Y, Hayashi T. Ligand binding properties of myoglobin reconstituted with iron porphycene: unusual O2 binding selectivity against CO binding. J Am Chem Soc 2005; 126:16007-17. [PMID: 15584735 DOI: 10.1021/ja045880m] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sperm whale myoglobin, an oxygen storage hemoprotein, was successfully reconstituted with the iron porphycene having two propionates, 2,7-diethyl-3,6,12,17-tetramethyl-13,16-bis(carboxyethyl)porphycenatoiron. The physicochemical properties and ligand bindings of the reconstituted myoglobin were investigated. The ferric reconstituted myoglobin shows the remarkable stability against acid denaturation and only a low-spin characteristic in its EPR spectrum. The Fe(III)/Fe(II) redox potential (-190 mV vs NHE) determined by the spectroelectrochemical measurements was much lower than that of the wild-type. These results can be attributed to the strong coordination of His93 to the porphycene iron, which is induced by the nature of the porphycene ring symmetry. The O2 affinity of the ferrous reconstituted myoglobin is 2600-fold higher than that of the wild-type, mainly due to the decrease in the O2 dissociation rate, whereas the CO affinity is not so significantly enhanced. As a result, the O2 affinity of the reconstituted myoglobin exceeds its CO affinity (M' = K(CO)/K(O2) < 1). The ligand binding studies on H64A mutants support the fact that the slow O2 dissociation of the reconstituted myoglobin is primarily caused by the stabilization of the Fe-O2 sigma-bonding. The IR spectra for the carbon monoxide (CO) complex of the reconstituted myoglobin suggest several structural and/or electrostatic conformations of the Fe-C-O bond, but this is not directly correlated with the CO dissociation rate. The high O2 affinity and the unique characteristics of the myoglobin with the iron porphycene indicate that reconstitution with a synthesized heme is a useful method not only to understand the physiological function of myoglobin but also to create a tailor-made function on the protein.
Collapse
Affiliation(s)
- Takashi Matsuo
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Abstract
N-confused porphyrin (NCP) is a porphyrin isomer that is different largely from the parent porphyrin, particularly in the physical, chemical, structural, and coordination properties. Introduction of the confused pyrrole into the normal and expanded porphyrins leads to generation of the confused porphyrinoids having rich structural diversity. In this Account, we introduce a series of N-confused porphyrinoids recently synthesized and highlight their properties such as fusion, peripheral N coordination, supramolecular assemblies, anion binding, and singlet-oxygen sensitization.
Collapse
Affiliation(s)
- Alagar Srinivasan
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | | |
Collapse
|
12
|
Hayashi T, Nakashima Y, Ito K, Ikegami T, Aritome I, Suzuki A, Hisaeda Y. Synthesis, structure, and chemical property of the first fluorine-containing porphycene. Org Lett 2003; 5:2845-8. [PMID: 12889889 DOI: 10.1021/ol0348452] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text] A pyrrolic macrocycle, beta-tetrakis(trifluoromethyl)porphycene, is the first example of a fluorine-containing porphycene. Four electron-withdrawing CF(3) substituents provide a highly distorted structure and an attractive electron-deficient nature for the porphycene framework. From the electrochemical study, it is found that the LUMO energy level for the beta-trifluoromethylporphycene is 1.24 V more stabilized compared to that for etioporphyrin. Moreover, the deprotonation of the inner N[bond]H proton in the porphycene was observed upon the addition of DBU.
Collapse
Affiliation(s)
- Takashi Hayashi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan.
| | | | | | | | | | | | | |
Collapse
|
13
|
Gulam RM, Matsushita T, Teraoka J. Electronic and Vibrational Properties of Porphycene Anions. J Phys Chem A 2003. [DOI: 10.1021/jp027683k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rabbani M. Gulam
- Graduate School of Science, Osaka City University, Sugimoto, Osaka 558-8585, Japan
| | - Toshio Matsushita
- Graduate School of Science, Osaka City University, Sugimoto, Osaka 558-8585, Japan
| | - Junji Teraoka
- Graduate School of Science, Osaka City University, Sugimoto, Osaka 558-8585, Japan
| |
Collapse
|
14
|
Hayashi T, Dejima H, Matsuo T, Sato H, Murata D, Hisaeda Y. Blue myoglobin reconstituted with an iron porphycene shows extremely high oxygen affinity. J Am Chem Soc 2002; 124:11226-7. [PMID: 12236710 DOI: 10.1021/ja0265052] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Myoglobin will be a good scaffold for engineering a function into proteins. To modulate the physiological function of myoglobin, almost all approaches have been demonstrated by site-directed mutagenesis, however, there are few studies which show a significant improvement in the function. In contrast, we focused on the replacement of heme in the protein with an artificial prosthetic group. Recently, we prepared a novel myoglobin reconstituted with an iron porphycene as a structural isomer of mesoheme. The bluish colored reconstituted myoglobin is relatively stable and the deoxymyoglobin reversibly binds ligands. Interestingly, the O2 affinity of the reconstituted myoglobin, 1.1 x 109 M-1, is a significant 1,400-fold higher than that of the native myoglobin. Furthermore, the unfavorable autoxidation kinetics show 7-fold decrease in rate for the reconstituted myoglobin relative to the native myoglobin, indicating the stable oxy-form against autoxidation. The net results come from the slow dissociation of the O2 ligand in the reconstituted myoglobin, koff = 0.11 s-1, because of the formation of strong hydrogen bond between His64 and negatively charged dioxygen. The present study indicates that the replacement of native heme with an artificially created prosthetic group will give us a unique function into a hemoprotein.
Collapse
Affiliation(s)
- Takashi Hayashi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, and PRESTO in Japan Science and Technology Corporation, Fukuoka 812-8581, Japan.
| | | | | | | | | | | |
Collapse
|
15
|
Gisselbrecht JP, Gross M, Vogel E, Sessler JL. Electrochemical studies of corrphycenes and metallocorrphycenes. Inorg Chem 2000; 39:2850-4. [PMID: 11232823 DOI: 10.1021/ic9913031] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Corrphycene 3 (Cn) is a structural isomer of porphyrin 1 that was synthesized for the first time 5 years ago. This paper reports on the redox properties of free-base octaethylcorrphycene H2OECn and 16 metal complexes derived therefrom. In CH2Cl2 solution, the free base and the metallo(II) octaethylcorrphycenes, M(II)OECn, typically undergo four distinct one-electron redox steps involving the tetrapyrrolic macrocycle, of which two are reduction steps and two are oxidations. One exception to this general pattern is displayed by the Co(II)OECn complex. In this instance, the first one-electron reduction is metal-centered and produces Co(I)OECn. A comparison of the redox potentials of corrphycenes with those of porphyrins and porphycenes indicates that the first reduction potentials of the free base and of the metallo-octaethylcorrphycenes are between those of the porphycenes-the easiest to reduce molecules in this set of isomeric tetrapyrrolic systems-and those of the porphyrins. The oxidation potentials of corrphycenes and porphyrins are found to be quite similar. On the other hand, porphycenes are oxidized at less positive potentials. The redox gap deltaE1/2 = E1/2Ox1 - E1/2Red1 is equal to 2.15 +/- 0.08 V for the free base corrphycene and the various metallocorrphycenes that were subjected to study. This redox gap is not much different from that observed in porphyrins (deltaE1/2 = 2.25 +/- 0.1 V), whereas if differs significantly from that observed in porphycenes (deltaE1/2 = 1.85 +/- 0.15 V). The sequence of these deltaE1/2 values parallels the lowest energy absorption maxima observed in the UV-vis spectra of these three isomers.
Collapse
Affiliation(s)
- J P Gisselbrecht
- Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide, Université Louis Pasteur, UMR ULP-CNRS no. 7512, Strasbourg, France
| | | | | | | |
Collapse
|
16
|
Furuta H, Ishizuka T, Osuka A, Ogawa T. “N-Fused Porphyrin”: A New Tetrapyrrolic Porphyrinoid with a Fused Tri-pentacyclic Ring. J Am Chem Soc 2000. [DOI: 10.1021/ja000148i] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroyuki Furuta
- Contribution from Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, PRESTO, JST, and Institute for Fundamental Research of Organic Chemistry (IFOC), Kyushu University, Fukuoka 812-8581, Japan
| | - Tomoya Ishizuka
- Contribution from Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, PRESTO, JST, and Institute for Fundamental Research of Organic Chemistry (IFOC), Kyushu University, Fukuoka 812-8581, Japan
| | - Atsuhiro Osuka
- Contribution from Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, PRESTO, JST, and Institute for Fundamental Research of Organic Chemistry (IFOC), Kyushu University, Fukuoka 812-8581, Japan
| | - Takuji Ogawa
- Contribution from Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, PRESTO, JST, and Institute for Fundamental Research of Organic Chemistry (IFOC), Kyushu University, Fukuoka 812-8581, Japan
| |
Collapse
|
17
|
Narayanan SJ, Sridevi B, Chandrashekar TK, Vij A, Roy R. Novel Core-Modified Expanded Porphyrins with meso-Aryl Substituents: Synthesis, Spectral and Structural Characterization. J Am Chem Soc 1999. [DOI: 10.1021/ja991472k] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seenichamy Jeyaprakash Narayanan
- Contribution from the Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India, Single-Crystal Diffraction Laboratory, University of Idaho, Moscow, Idaho 83843, andNMR Division, Central Drug Research Institute, Lucknow, India
| | - Bashyam Sridevi
- Contribution from the Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India, Single-Crystal Diffraction Laboratory, University of Idaho, Moscow, Idaho 83843, andNMR Division, Central Drug Research Institute, Lucknow, India
| | - Tavarekere K. Chandrashekar
- Contribution from the Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India, Single-Crystal Diffraction Laboratory, University of Idaho, Moscow, Idaho 83843, andNMR Division, Central Drug Research Institute, Lucknow, India
| | - Ashwani Vij
- Contribution from the Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India, Single-Crystal Diffraction Laboratory, University of Idaho, Moscow, Idaho 83843, andNMR Division, Central Drug Research Institute, Lucknow, India
| | - Raja Roy
- Contribution from the Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India, Single-Crystal Diffraction Laboratory, University of Idaho, Moscow, Idaho 83843, andNMR Division, Central Drug Research Institute, Lucknow, India
| |
Collapse
|
18
|
Kadish KM, Tabard A, Van Caemelbecke E, Aukauloo AM, Richard P, Guilard R. Physicochemical Characterization of σ-Bonded Aryl Iron(III) Porphycenes. X-ray Structures of (EtioPc)Fe(3,5-C6F2H3) and (EtioPc)In(C6H5), Where EtioPc Is the Dianion of 2,7,12,17-Tetraethyl-3,6,13,16-tetramethylporphycene. Inorg Chem 1998. [DOI: 10.1021/ic980610o] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and LIMSAG, UMR 5633, Université de Bourgogne, Faculté des Sciences “Gabriel”, 6 Boulevard Gabriel, 21100 Dijon, France
| | - Alain Tabard
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and LIMSAG, UMR 5633, Université de Bourgogne, Faculté des Sciences “Gabriel”, 6 Boulevard Gabriel, 21100 Dijon, France
| | - Eric Van Caemelbecke
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and LIMSAG, UMR 5633, Université de Bourgogne, Faculté des Sciences “Gabriel”, 6 Boulevard Gabriel, 21100 Dijon, France
| | - Ally M. Aukauloo
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and LIMSAG, UMR 5633, Université de Bourgogne, Faculté des Sciences “Gabriel”, 6 Boulevard Gabriel, 21100 Dijon, France
| | - Philippe Richard
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and LIMSAG, UMR 5633, Université de Bourgogne, Faculté des Sciences “Gabriel”, 6 Boulevard Gabriel, 21100 Dijon, France
| | - Roger Guilard
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and LIMSAG, UMR 5633, Université de Bourgogne, Faculté des Sciences “Gabriel”, 6 Boulevard Gabriel, 21100 Dijon, France
| |
Collapse
|
19
|
Bernard C, Le Mest Y, Gisselbrecht JP. Coordination Chemistry of Iron Porphycenes in the Presence of CO, CO2, and N-Methylimidazole: Electrochemical, ESR, and UV−Vis Study. Inorg Chem 1998. [DOI: 10.1021/ic970472n] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Bernard
- Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide, Université Louis Pasteur, UMR CNRS 7512, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, UMR CNRS 6521, B.P. 809, 29285 Brest Cedex, France
| | - Y. Le Mest
- Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide, Université Louis Pasteur, UMR CNRS 7512, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, UMR CNRS 6521, B.P. 809, 29285 Brest Cedex, France
| | - J. P. Gisselbrecht
- Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide, Université Louis Pasteur, UMR CNRS 7512, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, UMR CNRS 6521, B.P. 809, 29285 Brest Cedex, France
| |
Collapse
|
20
|
Angibaud P, Chaumette J, Desmurs J, Duhamel L, Plé G, Valnot J, Duhamel P. Asymmetric Synthesis of 2-chloro- and 2-bromo-alkanoic acids by halogenation of α-D-glucofuranose-derived silyl ketene acetals. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0957-4166(95)00251-j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
21
|
Bautista FM, Campelo JM, García A, León J, Luna D, Marinas JM. Synthesis of 1,3-dioxolanes catalysed by AlPO4and AlPO4–Al2O3: kinetic and mechanistic studies. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/p29950000815] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
22
|
Electrophilic Bromination of Carbon—Carbon Double Bonds: Structure, Solvent and Mechanism. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 1993. [DOI: 10.1016/s0065-3160(08)60183-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
|
23
|
|
24
|
A stereoconvergent strategy for the synthesis of enantiomerically pure (R)-(−) and (S)-(+)-2-(6-methoxy-2-naphthyl)-propanoic acid (naproxen). Tetrahedron 1989. [DOI: 10.1016/s0040-4020(01)81319-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
25
|
|