Photocatalyzed [2 + 2 + 2]-Cycloaddition of Nitriles with Acetylene: An Effective Method for the Synthesis of 2-Pyridines under Mild Conditions
摘要:
The photocatalyzed [2 + 2 + 2]-cycloaddition of nitriles with 2 equiv of acetylene to 2-pyridines can be carried out under mild conditions and represents a valuable extension to common synthetical methods. For the ideal wavelength range (350-500 nm), lamps as well as sunlight can be used. Working at room temperature and in organic solvents such as toluene or hexane as well as in water gives satisfying results in many cases. However, it is also possible to vary the solvent and the reaction temperature of the photocatalyzed synthesis and to choose, with respect to the specific substrate, specific requirements for this particular reaction and general requirements of the method. This simple and selective method derives its potential mainly from the large variety of applicable nitriles. Suitable substrates include (functionalized) aliphatic and aromatic nitriles as well as cyanamides derived from secondary amines.
Negative curable dye-containing composition, color filter, and method of manufacturing the same
申请人:Takakuwa Hideki
公开号:US20070072096A1
公开(公告)日:2007-03-29
The invention provides a negative curable dye-containing composition including at least one compound selected from amine and pyridine compounds, a phthalocyanine dye soluble in an organic solvent, a photopolymerization initiator, and a radical polymerizable monomer, a color filter formed by using the same, and a manufacturing method of the color filter.
Electrolyte Formulations
申请人:KAWATA Kentaro
公开号:US20120318360A1
公开(公告)日:2012-12-20
The present invention relates to electrolyte formulations comprising at least one imidazolium difluorodicyanoborate or pyrrolidinium difluorodicyanoborate and their use in an electrochemical and/or optoelectronic device such as a photovoltaic cell, a light emitting device, an electrochromic or photo-electrochromic device, an electrochemical sensor and/or biosensor, preferably their use in a dye or quantum dot-sensitized solar cell
US5939568A
申请人:——
公开号:US5939568A
公开(公告)日:1999-08-17
US8829201B2
申请人:——
公开号:US8829201B2
公开(公告)日:2014-09-09
[EN] ACCELERATED CATALYSIS OF OLEFINIC EPOXIDATIONS<br/>[FR] CATALYSE ACCELEREE DES EPOXYDATIONS OLEFINIQUES
申请人:——
公开号:WO1998033786A1
公开(公告)日:1998-08-06
[EN] Rhenium-catalyzed epoxidation of olefinic substrates is accelerated by the use of accelerants having a nitrogenous aromatic heterocyclic structure. Use of the accelerants also enables the use of aqueous hydrogen peroxide as an oxidant. To achieve optimum acceleration, the accelerant should have a concentration within a range from 2.0 mole percent to 100 mole percent of the accelerant with respect to 1 mole of the olefinic substrate. Use of the accelerant also results in an increased yield with respect to the conversion of the olefinic substrate to epoxide product. [FR] L'invention se rapporte à l'époxydation de substrats oléfiniques catalysée par le rhénium, qui est accélérée par des accélérateurs à structure hétérocyclique aromatique azotée. En outre, le recours à des accélérateurs permet d'utiliser en tant qu'oxydant le peroxyde d'hydrogène aqueux. Afin d'obtenir une accélération optimale, il faut que la concentration de l'accélérateur soit comprise comprise entre 2,0 et 100 moles d'accélérateur pour cent moles de substrat oléfinique. Le recours à l'accélérateur permet également d'assurer un rendement plus élevé en matière de conversion du substrat oléfinique en produit époxyde.