18509-03-0Relevant articles and documents
Micellar Effect on the Photosensitized Debromination of 2,3-Dibromo-3-phenylpropionic Acid Control of Forward and Back Electron Transfers
Takagi, Katsuhiko,Miyake, Nobuhisa,Nakamura, Eiichi,Usami, Hisanao,Sawaki, Yasuhiko,Iwamura, Hiizu
, p. 3475 - 3486 (1988)
The zinc tetraphenylporphyrin (ZnTPP)- and zinc tetrasodiumtetra(p-sulphonatophenyl)porphyrin (ZnTPPS)-sensitized photodebromination of 2,3-dibromo-3-phenylpropionic acid (1) in the presence of a sacrificial reductant yielding cinnamic acid has been studied in cationic cetyltrimethylammonium bromide (CTAB) micellar solution.The photosensitized electron transfer and the resultant debromination are significantly affected by the solubilizing sites of sensitizer and dibromide (1) in the micelle.The debromination proceeds most efficiently when the anionic sensitizer and (1) are adsorbed on the cationic micellar surface.The overall efficiency is controlled mostly by the back electron transfer rather than the forward one, which is competitive with the subsequent debromination steps.The cationic micellar surface is effective for the electron-transfer debromination when both or either of the sensitizers is anionically charged.
Nickel-catalyzed direct carboxylation of olefins with CO2: One-pot synthesis of α,β-unsaturated carboxylic acid salts
Huguet, Nfflria,Jevtovikj, Ivana,Gordillo, Alvaro,Lejkowski, Michael L.,Lindner, Ronald,Bru, Miriam,Khalimon, Andrey Y.,Rominger, Frank,Schunk, Stephan A.,Hofmann, Peter,Limbach, Michael
supporting information, p. 16858 - 16862 (2015/01/09)
The nickel-catalyzed direct carboxylation of alkenes with the cheap and abundantly available C1 building block carbon dioxide (CO2) in the presence of a base has been achieved. The one-pot reaction allows for the direct and selective synthesis of a wide range of a,b-unsaturated carboxylates (TON>100, TOF up to 6 h-1, TON= turnover number, TOF=turnover frequency). Thus, it is possible, in one step, to synthesize sodium acrylate from ethylene, CO2, and a sodium salt. Acrylates are industrially important products, the synthesis of which has hitherto required multiple steps.
Preparation of cinnamic acids
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, (2008/06/13)
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