Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By double-bond-shift isomerization
Reexamination Certificate
2011-05-10
2011-05-10
Nguyen, Tam M (Department: 1771)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By double-bond-shift isomerization
C585S665000, C585S670000, C585S671000
Reexamination Certificate
active
07939703
ABSTRACT:
The present invention relates to methods for accelerating the trans-cis isomerization of 1,2-diphenylethylene analogues by using photocatalyst. According to this invention, in the presence of polypyridyl platinum(II) complex with catalytic dosage, a solution containing trans-1,2-diphenylethylene analogues or mixture of cis- and trans-1,2-diphenylethylene analogues is irradiated by visible light to prepare product of cis-1,2-diphenylethylene analogues or product predominantly being cis-1,2-diphenylethylene analogues under inert gas atmosphere. This method has the advantages of fast reaction, high performance, easy separation of reaction system and recycle of the polypyridyl platinum (II) complexes.
REFERENCES:
patent: 5525632 (1996-06-01), Obsumi et al.
patent: 1723884 (2006-01-01), None
Olson, A. R., “The Study of Chemical Reactions From Potential Energy Diagrams,” Trans. Faraday Soc., 1931, 27 69-76.
Saltiel et al., “Mechanisms of Photochemical Reactions in Solution. IVII. cis-trans Isomerization of the Stilbenes by Excitation Transfer from Low Energy Sensitizers,” J. Am. Chem. Soc., 85 (1963) 2515-2516.
Hammond et al., “Mechanisms of Photochemical Reactions in Solution. XXII. Photochemical cis-trans Isomerization,” J. Am. Chem. Soc. (1964) 86, 3197-3217.
Saltiel, J., “Perdueteriostibene. he Role of Phantom States in the cis-trans Photoisomerization of Stilbenes,” J. Am. Chem. Soc. (1967) 89:4, 1036-1037.
Caldwell et al., “Fluorenone-Photosensitized Isomerization of trans-Stilbene. Inefficiencies both in Intersystem Crossing and in Triplet Excitation Transfer,” J. Am. Chem. Soc. (1971) 93:2, 532-534.
Valentine et al., “Mechanisms of Photochemcial Reactions in Solution. LXVII. energy Wastage in Photosensitized Isomerizations of the Stilbenes,” J. Am. Chem. Soc. (1972) 94:10, 3449-3454.
Saltiel et al., “Mechanism of direct cis-trans photoisomerization of the stilbenes. Solvent viscosity and the azulene effect,” J. Am. Chem. Soc.(1972) 94:8 2742-2749.
Liu, R. S. H., “9,10-Dichloroanthracene-Sensitized Isomerization of Stilbenes. The Question of Energy Transfer between Intimately Associated Molecular Pairs,” J. Am. Chem. Soc. (1968) 90:7, 1899-1900.
Saltiel, J., “Perdeuteriostilbene. The Triplet and Singlet Paths for Stilbene Photoisomerization,” J. Am. Chem. Soc. (1968) 90:23, 6394-6400.
Saltiel et al., “Nonvertical Triplet Excitation Transfer to cis- and trans-Stilbene,” J. Am. Chem. Soc. (1984) 106, 3144-3151.
Whitten et al., “Photochemistry of Metalloporphyrin Complexes. Ligand Photoisomerization via Intramolecular Energy Transfer,” J. Am. Chem. Soc. (1972) 94:22, 7811-7823.
Zarnegar et al., “Photoreactions of Transition Metal Complexes. Ligand Reactivity as a Probe for Excited-State Characterization,” J. Am. Chem. Soc. (1973) 95:13, 4367-4372.
Mercer-Smith et al., “Photosensitization of Stilbene Isomerization by Palladium and Platinum Porphyrins, an Intermolecular Quantum Chain Process,” J. Am. Chem. Soc. (1978) 100:9, 2620-2625.
Ams et al., “Intramolecularly Sensitized Precipitons: A Model System for Application to Metal Sequestration,” J. Am. Chem. Soc. (2006) 128, 250-256.
Ams et al., “Benzil-Tethered Precipitons for Controlling Solubility: A Round-Trip Energy-Transfer Mechanism in the Isomerization of Extended Stilbene Analogues,” J. Am. Chem. Soc. (2007) 129, 3966-3972.
Eenkhoorn et al., “The Wittig Reaction of Indo1-2-methyltriphenylphosphonium Iodide with 4-Piperidone Derivatives and Aromatic Aldehydes,” Can. J. Chem. vol. 51 (1973) 792-810.
Lewis et al., “Molecular Structure and Photochemistry of (E)- and (Z)-2-(2-(2-Pyridyl)ethenyl)indole. A Case of Hydrogen Bond Dependent One-Way Photoisomerization,” J. Am. Chem. Soc. (1995) 117:11, 3029-3036.
Arai et al., ““One-Way” Photoisomerization Between cis- and trans-Olefin. A Novel Adiabatic Process in the Excited State,” Tetrahedron Letters, vol. 24, No. 28, (1983) 2873-2876.
Peng Ming-Li
Wang Deng-Hui
Wu Li-Zhu
Zhou Li
Nguyen Tam M
Technical Institute of Physics and Chemistry of Chinese Academy
Volpe and Koenig P.C.
LandOfFree
Method for photocatalytic isomerization of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for photocatalytic isomerization of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for photocatalytic isomerization of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2660292