摘要:
The present invention relates to an amination process for the manufacture of polyamines. The purpose of the process is to increase the selectivity of linear aminated products and to prevent the formation of discoloring by-products or by-products which may later cause discoloration. According to the process this is achieved by performing, in a first part of the process, the amination to a conversion degree of between 50 and 98% by weight, calculated on the total yield of polyamines, at a proportionally time-weighted average temperature, which is at least 15.degree. C. higher than the proportionally time-weighted average temperature in the remaining part.
摘要:
A catalyst comprises, based on the total weight of the catalyst,0.1-6% by weight of cobalt, nickel or a mixture thereof,0.001-25% by weight of ruthenium,0-10% by weight of copper and0-5% by weight of promoterson a porous metal oxide carrier.It preferably comprises 0.1-3% by weight of cobalt and 0.1-3% by weight of nickel. It can be used in hydrogenation reactions, dehydrogenation reactions or hydrogenation/dehydrogenation reactions, in particular in the amination of alkylene oxides, alcohols, aldehydes or ketones with ammonia or primary or secondary amines.
摘要:
Describes a method of electrochemically converting amine hydrohalide, e.g., ethyleneamine hydrochloride, into free amine, e.g., free ethyleneamine, by charging an aqueous solution of amine hydrohalide to the catholyte compartment of an electrolytic cell, which contains a cathode, charging hydrogen gas to the anode compartment of the cell, which contains an anode assembly comprised of a hydrogen consuming gas diffusion anode fixedly held between a current collecting electrode and an anion exchange membrane. The catholyte and anode compartments of the cell are separated by the anion exchange membrane. An amine hydrohalide solution containing free amine is removed from the catholyte compartment.
摘要:
This invention provides a novel series of non-peptidyl compounds which are useful in the treatment or prevention of a physiological disorder associated with an excess of tachykinins. This invention also provides methods for the treatment of such physiological disorders as well as pharmaceutical formulations which employ these novel compounds.
摘要:
This invention provides a novel series of non-peptidyl compounds which are useful in the treatment or prevention of a physiological disorder associated with an excess of tachykinins. This invention also provides methods for the treatment of such physiological disorders as well as pharmaceutical formulations which employ these novel compounds.
摘要:
Compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 each independently are lower-alkyl; or together are alkylene with 3-5 C-atoms in a straight chain; one of the residues R.sup.3 and R.sup.4 is hydrogen and the other is hydrogen or lower-alkyl; R.sup.6 and R.sup.7 are hydrogen or lower-alkyl; R.sup.5 and R.sup.8 are hydrogen, lower-alkyl, lower-alkoxy or halogen; X signifies --O--, --S--, --SO--, --SO.sub.2 -- or --NR.sup.9 ; R.sup.9 is hydrogen, lower-alkyl or acyl; Y is --S(O).sub.m R.sup.10 or --NHet and, where X is --NR.sup.9 --, --S--, --SO-- or --SO.sub.2 --, also --N(R.sup.11).sub.2 or --OR.sup.12 ; R.sup.10 is lower-alkyl; R.sup.11 and R.sup.12 are hydrogen, lower-alkyl or acyl; --NHet is a 5-8 membered, saturated or unsaturated, monocyclic heterocycle attached via a N-atom; n is 2, 3 or 4 and m is 0, 1 or 2, are described. The compounds of formula I are useful as agents for the treatment of disorders such as neoplasms, dermatoses or ageing of the skin.
摘要翻译:式Ⅰ的化合物,其中R 1和R 2各自独立地为低级烷基; 或一起是直链中具有3-5个C原子的亚烷基; 残基R3和R4之一是氢,另一个是氢或低级烷基; R6和R7是氢或低级烷基; R5和R8是氢,低级烷基,低级烷氧基或卤素; X表示-O - , - S - , - SO - , - SO 2 - 或-NR 9; R9是氢,低级烷基或酰基; Y是-S(O)m R 10或-NHet,且其中X是-NR 9 - , - S - , - SO-或-SO 2 - ,以及-N(R 11)2或-OR 12; R10为低级烷基; R 11和R 12是氢,低级烷基或酰基; -NHet是通过N-原子连接的5-8元饱和或不饱和的单环杂环; n为2,3或4,m为0,1或2。 式I的化合物可用作治疗诸如赘生物,皮肤病或皮肤老化的病症的药剂。
摘要:
A method for producing amines, the method comprising contacting at reactive conditions at least one alcohol, aldehyde or ketone, or a mixture thereof, with an aminating agent in the presence of a catalyst, is improved by employing as the catalyst a composition comprising cobalt, copper, and a third component selected from a group consisting of iron, zinc, zirconium and mixtures thereof.
摘要:
In the recovery of ethylene amines from aqueous solutions by alcohol extraction the alcoholic extract is treated with carbon dioxide so as to convert the extracted amines into carbamates, which are then back extracted with water and recovered by conventional decarbonation and dehydration. The double extraction technique results in an aqueous concentrate of at least twice the original amine concentration.
摘要:
Ethyleneamines are recovered from an aqueous solution of carbonates of ethyleneamines by distilling an aqueous solution of carbonates of ethyleneamines including ethylenediamine, in which the molar ratio of the carbon dioxide component to the ethyleneamines including ethylenediamine is 0.01 to 0.5, whereby ethylenediamine is distilled out together with water. The aqueous solution to be distilled is advantageously prepared by heating an aqueous solution of carbonates of ethyleneamines including ethylenediamine to effect decarboxylation.
摘要:
Piperazine is substantially selectively converted to ethylenediamine and N-aminoethylpiperazine by catalytically reductively aminating piperazine in the presence of added hydrogen, ammonia and (optionally) water under reductive amination conditions selected to provide a piperazine conversion of not more than about 30%.