摘要:
The present invention relates to the field of catalytic hydrogenation and, more particularly, to methods of manganese-catalysed hydrogenation of esters to alcohols. Advantageously, where the esters are chiral, the hydrogenations proceed with high or complete stereochemical integrity..
摘要:
The invention relates to the field of the organic chemistry and, in particular to a method for preparing a compound of formula (I) or (II), and/or a mixture of isomers thereof, wherein R is -Alk, -AlkN(Alk) 2 , -AlkN(Ar) 2 , -AlkNAlkAr, -AlkOH, -AlkOAlk, -AlkOAr, -AlkSAlk, -AlkSAr, or -Ar; R 1 , R 2 , R 3 , and R 4 are independently -Alk, -Hal, - OH, -OAlk, -OAr, -SAlk, -SAr, or -NR 2 , wherein R is -Alk, - AlkN(Alk) 2 , -AlkN(Ar) 2 , -AlkNAlkAr, -AlkOH, -AlkOAlk, -AlkOAr, -AlkSAlk, -AlkSAr, or -Ar, wherein Alk is C 1 - C 16 alkyl, C 3 -C 16 cycloalkyl, C 2 -C 16 alkenyl, C 2 -C 16 alkynyl; Ar is phenyl; Hal is halogen selected from -Cl, -Br, and -I,
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur destillativen Reinigung von Ethylendiamin (EDA), wobei das Verfahren die Schritte a) und b) umfasst. In Schritt a) wird ein Gemisch (G1) enthaltend Wasser, EDA und N-Methylethylendiamin (N- MeEDA) in eine Destillationsvorrichtung (D1) eingespeist, aus der über Kopf bei einem Druck von größer als 4,8 bara die Hauptmenge des im Gemisch (G1) enthaltenen Wassers abgetrennt wird. Aus dem Sumpf von (D1) wird das an Wasser abgereicherte Gemisch (G2) in Schritt b) in eine Destillationsvorrichtung (D2) eingespeist. Über den Kopf von (D2) wird die Hauptmenge an N-MeEDA abdestilliert. Der aus dem Sumpf von (D2) gewonnene Strom S3 enthält EDA, wobei die im Gemisch (G1) enthaltenen Komponenten Wasser sowie N-MeEDA weitgehend oder vollständig abgereichert sind. Gegebenenfalls können weitere Destillationsschritte durchgeführt werden, um reines EDA zu erhalten, beispielsweise wenn im Gemisch (G1) zusätzlich Diethylentriamin (DETA) enthalten ist. Sofern im Gemisch (G1) zusätzlich Ammoniak enthalten ist, erfolgt im erfindungsgemäßen Verfahren vorzugsweise vor Durchführung des Schrittes a) zusätzlich eine Ammoniakabtrennung.
摘要:
The present invention provides (R)-3-Amino-1-butanol (D)-tartarate (IIb); process for its preparation and its conversion to Dolutegravir. The present invention also provides an improved process for the preparation of Dolutegravir (I) or pharmaceutically acceptable salts wherein compound (XVI) is reacted with an optically active acid addition salt of (R)-3-amino-1-butanol (lla).
摘要:
The present invention relates to pharmaceutically acceptable amine salts of pitavastatin and a method for producing pharmaceutically acceptable amine salts of pitavastatin. Also provided are pharmaceutical compositions of these amine salts or solvates thereof, and methods of their use as HMG-CoA reductase inhibitors.
摘要:
Amine stabilizing agents containing an azeotrope comprising water, an alcohol, and sodium stabilized by surrounding organized water. Amine stabilizing agents containing water and a liquid silica hydroxide compound. Methods of making of amine stabilizing agents where solid silicon rock and sodium hydroxide are mixed with an ammonium/water solution to produce a green liquid in a first stage of the reaction. Alcohol is added and the alcohol fraction is separated from the non-alcohol fraction to produce an alcohol fraction product and a bottom fraction that is not soluble in alcohol or organics. The alcohol extraction is repeated a number of times to produce a concentrated product with little silicon. The agents can be added to amines for stabilizing amines in an amine processing of gases, in CO2 capture, in CO2 abatement systems and in other systems where amines are utilized to remove contaminants.
摘要:
본 발명은 주 흡수제로 3급 디알킬알칸올아민, 속도증진제로 2급 알칸올아민, 재생촉진제로 폴리알킬렌 글리콜 모노메틸 에테르가 포함된 수용액을 이산화탄소 흡수제로 사용하는 것에 관한 것으로, 본 발명에 따른 폴리알킬렌 글리콜 모노메틸 에테르를 포함하는 알칸올아민계 이산화탄소 흡수제와 이를 이용한 이산화탄소 흡수방법 및 분리방법은 이산화탄소 흡수능이 우수하고 이산화탄소 흡수속도가 빠를 뿐만 아니라 종래의 알칸올아민계 흡수제에 비해 흡수제 재생온도가 현저히 낮아 흡수 공정에 소요되는 전체 에너지 소비를 크게 줄일 수 있으며, 또한 낮은 재생온도로 인해 회수된 이산화탄소가 수분 및 흡수제 증기로 오염되는 것을 방지할 수 있다.
摘要:
Die vorliegende Erfindung betrifft neuartige quaternisierte Ammoniumsalze von Hydrocarbylepoxiden, deren Herstellung und deren Verwendung als Kraft-und Schmierstoffadditiv, wie insbesondere als Detergenzadditiv; zur Verringerung oder Verhinderung von Ablagerungen in den Einspritzsystemen von direkteinspritzenden Dieselmotoren, insbesondere in Common-Rail-Einspritzsystemen, zur Verringerung des Kraftstoffverbrauches von direkteinspritzenden Dieselmotoren, insbesondere von Dieselmotoren mit Common-Rail-Einspritzsystemen, und zur Minimierung des Leistungsverlustes (power loss) in direkteinspritzenden Dieselmotoren, insbesondere in Dieselmotoren mit Common-Rail-Einspritzsystemen; sowie als Additiv für Ottokraftstoffe, insbesondere zum Betrieb von DISI Motoren.
摘要:
Compounds of formula (I) wherein the groups are as defined in the description, are used as medicaments, in particular for the treatment of a disease selected from the group consisting of: cognitive impairment, memory dysfunction, neurodegenerative disorders and related dementia, Alzheimer's disease, Parkinson's disease, neuropsychiatric behavior associated with Alzheimer's disease, pain, depression, attention deficit hyperactivity disorder and for pharmacological addictive substance or intoxicant therapy; and for the neuroprotection from NMDA toxicity.