The first metal‐free catalysts are reported for the methylation of amines with carbondioxide. Proazaphosphatrane superbases prove to be highly active catalysts in the reductive functionalization of CO2, in the presence of hydroboranes. The new methodology enables the methylation of NH bonds in a wide variety of amines, including secondary amines, with increased chemoselectivity.
The Lossenrearrangement is a classic process for transforming activated hydroxamic acids into isocyanate under basic or thermal conditions. In the current report we disclosed a consecutive Lossenrearrangement/transamidation reaction in which unactivated hydroxamic acids were converted into N-substituted formamides in a one-pot manner under catalyst- and additive-free conditions. One feature of this
[EN] 5,7-DIHYDRO-6H-PYRROLO[2,3-D]PYRIMIDIN-6-ONE DERIVATIVES FOR MARK INHIBITION<br/>[FR] DÉRIVÉS DE 5,7-DIHYDRO-6H-PYRROLO[2,3-D]PYRIMIDIN-6-ONE UTILISABLES EN VUE DE L'INHIBITION DE LA MARK
申请人:MERCK & CO INC
公开号:WO2009152027A1
公开(公告)日:2009-12-17
Compounds of formula I: are potent and selective inhibitors of microtubule affinity regulating kinase (MARK), and hence find use in treatment of Alzheimer's disease and other conditions associated with hyperphosphorylation of tau.
Thermoplastic Resin Composition and Optical Films Made Therefrom
申请人:Miyaki Nobuyuki
公开号:US20080095955A1
公开(公告)日:2008-04-24
The thermoplastic resin composition of the present invention comprises (A) a cycloolefin-based polymer and (B) a vinyl-based polymer having a polar group, has a glass transition temperature of not lower than 100° C. and has a difference in glass transition temperature between the polymers (A) and (B) of less than 50° C. The optical film of the present invention comprises the thermoplastic resin composition of the invention. According to the present invention, it is possible to improve development of retardation at a low stress in the film stretching while retaining excellent heat resistance and optical properties and maintaining wavelength dispersion properties. The optical film of the invention exhibits properties that the dependence of retardation of a transmitted light on wavelength, said retardation being obtained by stretch orientation of the film, becomes larger as the wavelength becomes longer (positive wavelength dispersion properties), has low water absorption and low coefficient of photoelasticity, and is excellent in adhesion or bonding properties to other materials.
THERMOPLASTIC RESIN COMPOSITION, OPTICAL FILM AND RETARDATION FILM
申请人:Okaniwa Motoki
公开号:US20090209705A1
公开(公告)日:2009-08-20
Each of the thermoplastic resin composition and the optical film of the present invention comprises a cycloolefin-based polymer (A) and a vinyl-based polymer (B) having a structural unit derived from p-isopropenylphenol. The thermoplastic resin composition and the optical film exhibit excellent compatibility of their components with keeping property of low birefringence inherent in the thermoplastic resin composition comprising the cycloolefln-based polymer and the vinyl-based polymer, and they are excellent in weathering resistance and heat resistance.