摘要:
Die vorliegende Erfindung bezieht sich auf ein Syntheseverfahren von n-Butanderivaten, insbesondere 1-Butanol, 1-Butanal, oder 1-Buttersäure sowie Crotonaldehyd, und deren Folgeprodukte, wobei zunächst Methanol zu einem C 2 -Baustein, entweder Ethanol oder Acetaldehyd umgesetzt und dieser C 2 -Baustein dann zu einem C 4 -Baustein dimerisiert wird.
摘要:
A novel process and apparatus is disclosed for performing chemical reactions. Highly compressed gaseous streams such as H2, CO, C02, H20, 02, or CH4 are raised to Mach speeds to form supersonic jets incorporating Shockwaves. Two or more such jets are physically collided together to form a localized reaction zone where the energy from the Shockwaves causes endothermic reactions wherein the chemical bonds of the reactant gases are broken. Between and among reactants molecular surface interaction and molecular surface chemistry take place. In the ensuing exothermic reactions a desired new chemical product is formed and this product is locked into a lower state of enthalpy (state of energy of formation) through adiabatic cooling by means of a free-jet expansion.
摘要:
La présente invention se rapporte à un procédé de synthèse de composés cyclohexènones et cyclohexènols présentant des fragrances et des propriétés de rémanence particulières, ledit procédé consistant en la condensation d'une cétone sur un α-méthylène-aldéhyde afin d'obtenir par une réaction domino, des composés de formule (I) suivante.
摘要:
The present invention relates to a process for preparing a terpenoid derivative, the process comprising a metathesis of an olefin and a terpenoid, and to terpenoid derivatives prepared with said process.
摘要:
Verfahren zur Herstellung einer hydroxy- und aldehydfunktionale Verbindungen enthaltenden Mischung durch Kreuz-Metathesereaktion mindestens einer mindestens einfach ungesättigten Fettsäure oder einem mindestens einem mindestens einfach ungesättigten Fettsäurederivat mit einer olefinischen Verbindung, die mindestens eine Hydroxygruppe und mindestens eine C-C-Doppelbindung aufweist, in Gegenwart eines Metathesekatalysators bei einer Temperatur von höchstens 180 °C.
摘要:
The present invention relates to the synthesis of leukotriene receptor agonist compounds and to novel intermediates employed in their preparation. Leukotriene agonists are used in the treatment of asthma, as well as other conditions mediated by leukotrienes such as inflammation and allergies. A compound of particular interest is montelukast and the present invention describes an improved process for making montelukast and similar compounds.
摘要:
The invention relates to a new method prepare high-molecular-weight aliphatic linear, straight-chain primary alcohols having between 24 up to and including 32 carbon atoms, comprising the steps of : a. transforming the alcohol group of an α-functionalised-ω-hydroxy linear straight chain alkyl or alkene (i) into an alkoxy-metal complex (ii) b. optionally, followed by a transformation of the α-group into a nucleophilic group, c. followed by a coupling reaction of the component as formed on its α-position. The invention further relates to process for the preparation of such protected alcohols via an organometallic cross coupling reaction or a Wittig reaction and novel intermediates and starting compounds therefore.
摘要:
Functionalized allylic olefins are condensed by metathesis using the catalyst 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene ruthenium benzylidene [Ru*] (1).
摘要:
The process forms an alkyl aralkyl ketone from an aralkenyl secondary alcohol having an allylic double bond relative to the hydroxycarbinyl group, and having the allylic double bond positioned between the aryl moiety and the hydroxycarbinyl group. This is accomplished by heating the alcohol in a chemically indifferent organic liquid medium to which a catalytic quantity of an iron polycarbonyl has been added, so that an internal rearrangement occurs. Among the ketones that can be efficiently produced in this manner is non-steroidal antiinflammatory agent, 4-(6'-methoxy-2'-naphthyl)-butan-2-one, generally known as nabumetone.