GETRÄGERTES KATALYSATORSYSTEM ENTHALTEND EIN METALLOCEN, EINE LEWIS-BASE UND EINE ELEMENTORGANISCHE VERBINDUNG DER III. HAUPTGRUPPE, SOWIE DESSEN VERWENDUNG
申请人:Basell Polypropylen GmbH
公开号:EP1280600A2
公开(公告)日:2003-02-05
Rewritable optical information recording medium, recording and reproducing methods, as well as recording and reproducing apparatus
申请人:Tamada Sakuya
公开号:US20060088786A1
公开(公告)日:2006-04-27
A rewritable optical information recording medium including a recording layer composed of an organic dye film is provided, in which recording and erasing information can be performed reversibly by laser light irradiation. A rewritable optical information recording medium including at least one organic dye film which is substantially made of only at least one kind of organic dye compounds as a recording film is provided. The recording and erasure of information are performed by a reversible physical change of the organic dye film substance caused by laser light irradiation. Specifically, data recording is performed by a physical change locally caused by the irradiation of recording laser light, data reproduction is performed by detecting change in intensity of returned light of reproducing laser light having less power than the recording laser light, and data erasure is performed by applying at least once continuous light or pulse light having laser power more than the reproducing laser light and less than the recording laser light. The physical change is a change in shape.
[DE] NEUES KATALYSATORSYSTEM UND DESSEN VERWENDUNG<br/>[EN] NOVEL CATALYST SYSTEM AND THE USE THEREOF<br/>[FR] NOUVEAU SYSTEME CATALYSSEUR ET SON UTILISATION
申请人:BASELL POLYPROPYLEN GMBH
公开号:WO2001047635A2
公开(公告)日:2001-07-05
Die vorliegende Erfindung beschreibt ein Katalysatorsystem enthaltend mindestens ein Metallocen, mindestens ein Elementorganische Verbindung der III Hauptgruppe als Cokatalysator, mindestens ein Trägermaterial und gegebenenfalls weitere Organometallverbindungen der I. II. Oder III Hauptgruppe. Das Katalysatorsystem kann vorteilhaft zur Polymerisation von Olefinen eingesetzt werden, wobei auf die Verwendung von Aluminoxanen wie Methylaluminoxan (MAO), das üblicherweise in hohem Überschuß eingesetzt werden muß, als Cokatalysator verzichtet werden kann und dennoch eine hohe Katalysatoraktivität und gute Polymermorphologie erzielt wird.
One-pot reductive amination of carboxylic acids: a sustainable method for primary amine synthesis
作者:Robin Coeck、Dirk E. De Vos
DOI:10.1039/d0gc01441a
日期:——
carboxylic acids is a very green, efficient and sustainable method for the production of (bio-based) amines. However, with current technology, this reaction requires two to three reaction steps. Here, we report the first (heterogeneous) catalytic system for the one-pot reductive amination of carboxylic acids to amines, with solely H2 and NH3 as the reactants. This reaction can be performed with relatively cheap
having a benzene-pyridine biaryl skeleton as a carbonyl catalyst, we successfully unlock the nucleophilic reactivity of the α-amino C–H bonds of α-aminoacid esters toward alkyl halides without protection of the NH2 group, forming a wide range of chiral quaternary α-aminoacid esters in up to 99% yield and 99% ee. Like transformations in biological systems, this protocol is featured with no protecting