摘要:
في هذا الاختراع، يتم استعمال جزيئات نانوية من البالاديوم المدعمة على السليكا لتحضير أصناف من الأمينات ذات قيمة أعلى، باستعمال كحولات ونتروارينات وأمينات مختلفة. يتم تحضير هذا الحافز بتثبيت ملح البالاديوم على السليكا، ثم باختزاله بالهيدروجين.
摘要:
The invention relates to a process for the production of 1,6-difunctionalized hexane derivatives from 1,3-diunsaturated hydrocarbons, preferably butadiene, wherein a hydroformylation with carbon monoxide and hydrogen is performed in the presence of an at least dihydric alkanol and during the hydroformylation the temperature is increased. The reaction yields the acetals of the 1,6-hexanedial derivatives which are isolated and further reacted to obtain the desired 1,6-difunctionalized hexane derivatives, in particular 1,6-hexanediamine, 1,6-hexanediol and adipic acid.
摘要:
A process for the production of aromatic primary amines, by reacting an aromatic dialdehyde with hydrogen and ammonia or an ammonia-liberating compound, in the presence of a hydrogenation catalyst and an amine, wherein the molar ratio of the amine to the aromatic dialdehyde is no less than 1: 4 at the start of the reaction.
摘要:
Disclosed herein are compounds of the general Formula (I), and methods of synthesizing substituted bicyclo[1.1.1 jpentanes. The synthetic methods described herein use a [1.1.1]propellane, a Group VIII transition metal compound, a hydride source and a reagent that can contribute a substituent to form a substituted bicycIo[1.1.1 ]pentane, such as a compound of the general Formula (I).
摘要:
Verfahren zur reduktiven Aminierung durch Umsetzung einer Carbonylverbindung mit einem sekundären Armi und Wasserstoff, dadurch gekennzeichnet, dass die Umsetzung kontinuierlich durchgeführt wird und das Reaktionsgemisch, welches die Carbonylverbindung, das sekundäre Armi und Wasserstoff enthält, zunächst mit einem sauren Festbett und danach mit einem Festbett des Hydrierkatalysator (im Nachfolgenden Hydrierfestbett genannt) in Kontakt gebracht wird.
摘要:
Disclosed is a process for performing a chemical reaction selected from reductive amination and hydrogenation of a first functional group in an organic feed substrate, which feed substrate comprises at least one further functional group containing a halogen atom, wherein the halogen atom is selected from the list consisting of chlorine, bromine, iodine, and combinations thereof, in the presence of hydrogen and a heterogeneous catalyst comprising at least one metal from the list of Pd, Rh, and Ru, together with at least a second metal from the list consisting of Ag, Ni, Co, Sn, Cu and Au. The process is preferably applied for the reductive amination of 2-chloro- benzaldehyde to form 2-chloro-benzyldimethylamine, as an intermediate in the production of agrochemically active compounds and microbiocides of the methoximinophenylglyoxylic ester series. Further disclosed is a composition rich in 2-chloro-benzyldimethylamine, further comprising an amount of 2- chloro-benzyl alcohol and being low in chlorotoluene isomers.
摘要:
The present invention relates to an improved process for the preparation of N-[l-(l-naphthyl)ethyl]-3-[3-(trifluoromethyl) phenyl]propan-l-amine and pharmaceutically acceptable salts thereof. In particular, the present invention relates to an improved process for the preparation of cinacalcet or pharmaceutically acceptable salts and intermediates thereof.
摘要:
A compound having the following structure: or a pharmaceutically acceptable salt or derivative thereof. The compound may be used in the treatment or prevention of a disorder selected from appetite regulation, obesity, metabolic disorders, cachexia, anorexia, pain, inflammation, neurotoxicity, neurotrauma, stroke, multiple sclerosis, spinal cord injury, Parkinson's disease, levodopa-induced dyskinesia, Huntington's disease, Gilles de la Tourette's syndrome, tardive dyskinesia, dystonia, amyotrophic lateral sclerosis, Alzheimer's disease, epilepsy, schizophrenia, anxiety, depression, insomnia, nausea, emesis, alcohol disorders, drug addictions such as opiates, nicotine, cocaine, alcohol and psychostimulants, hypertension, circulatory shock, myocardial reperfusion injury, atherosclerosis, asthma, glaucoma, retinopathy, cancer, inflammatory bowel disease, acute and chronic liver disease such as hepatitis and liver cirrhosis, arthritis and osteoporosis.
摘要:
The invention relates to the synthesis of tetraphenol-substituted structures, in particular meta-substituted xylenes. Said tetraphenol-type structures are reacted to obtain organic phosphorus compounds, in particular organophosphites. The invention further relates to the production of catalytically active compositions which contain transition metals in addition to the aforementioned organic phosphorus compounds. According to another subject matter of the invention, said catalytically active compositions are used in chemical reactions with small molecules, e.g. HCN, CO, hydrogen, and amines.
摘要:
Verfahren zur Herstellung eines Amins durch Umsetzung eines primären oder sekun- dären Alkohols, Aldehyds und/oder Ketons mit Wasserstoff und einer Stickstoffverbindung, ausgewählt aus der Gruppe Ammoniak, primäre und sekundäre Amine, in Gegenwart eines zirkoniumdioxid- und nickelhaltigen Katalysators, dadurch gekennzeichnet, dass die katalytisch aktive Masse des Katalysators vor dessen Reduktion mit Wasserstoff sauerstoffhaltige Verbindungen des Zirkoniums, Kupfers und Nickels und im Bereich von 0,5 bis 6 Gew.-% sauerstoffhaltige Verbindungen des Silbers, berechnet als AgO, enthält.