Abstract:
The present invention refers to reagents and methods for preparing a peptide sequence having a [18F]fluoro-aromatic amino acid side which may be further substituted, in particular a 4-[18F]fluoro-phenylalanine side chain in peptide sequences, by chemoselective radio-deoxyfluorination of an aromatic amino acid residue, in particular a tyrosine residue using a traceless-activating group and the reagents used in said process.
Abstract:
The present application refers to a process for preparing of nanostructured metal oxides such as cobalt oxide and transition metal incorporated cobalt oxides and nickel aluminium oxides and nickel metal supported on aluminium oxide using plant material such as spent tea leaves as a hard template and the use of such catalysts for water oxidation.
Abstract:
The present invention refers to a process for preparing amines comprising reacting a compound of the formula R1—CO—R2 comprising a carbonyl moiety with a amine compound of the formula HNR3R4 and carbon monoxide in the presence of a catalyst.
Abstract:
The present invention refers to a process for the trans-selective hydroboration of internal alkynes and the so-obtained products. The inventive process makes use of a borane of the formula X1X2BH selected from the group of dialkyl boranes or di(alkoxy)boranes which are reacted with the internal alkynes in the presence of a cyclyopentadienyl-coordinated ruthenium catalyst.
Abstract:
The present invention relates to a process for preparing substituted indole derivatives. More particularly, the invention refers to a new method to synthesize indole-derivatives by oxidative C—H-functionalization.
Abstract:
Bicyclo-(3,3,0)-octene-(2) is prepared with quantitative conversion and in high yields at substantially room temperature and high reaction rate with the use of a catalytic mixture of nickel compounds and aluminum compounds. The resulting bicyclooctene is a valuable monomer for the production of a high molecular weight polyolefin or a starting material for alicyclic dicarboxylic acids.
Abstract:
A process for the preparation of oligomers especially of 1,3diolefins which comprises contacting an olefinic feed with a carbonyl free 0-valent nickel complex catalyst containing 1 to 4 electron donor constituents in the presence of morpholine or a specified amine which amine is present in an excess beyond that which has been bonded to the nickel in the 0-valent nickel complex catalyst.
Abstract:
COMPOUNDS OF THE BIS - DIENE - (1,3) - IRON MONOCARBONYL TYPE ARE PREPARED IN YIELDS OF AS HIGH AS 90% AND MORE BY IRRADIATING IRON PENTACARBONYL TOGETHER WITH THE DIENE IN A SOLVENT AT TEMPERATURES WITHIN THE RANGE OF -60*C. TO +20*C. A PARTICULARLY SUITABLE RADIATION SOURCE IS A HIGH PRESSURE MERCURY LAMP. THE COMPOUNDS ARE SUITED AS CATALYSTS FOR THE OLIGOMERIZATION OF UNSATURATED HYDROCARBON COMPOUNDS.
Abstract:
An assembly for effecting chemical reactions in solutions by radiation comprises a means providing a source of radiation and a reaction vessel rotatably mounted therearound. The reaction vessel is used to contain the solution to be treated by radiation. The vessel includes a bulge portion which extends radially outwardly for holding the solution at a location for exposure to the radiation. When a precipitate is formed upon exposure to the radiation during the rotation of the vessel, the precipitate is maintained at the furthermost point from the radiation source in the bulge portion so that clear solution will be maintained near the source of radiation. Several specific embodiments of the assembly are disclosed.