- COMPLEX OF GADOLINIUM AND A CHELATING LIGAND DERIVED FROM A DIASTEREOISOMERICALLY ENRICHED PCTA AND PREPARATION AND PURIFICATION PROCESS
-
The present invention relates to a complex of formula (II) constituted of at least 90% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing and purifying said complex of formula (II), and also to a composition comprising said complex.
- -
-
Paragraph 0027-0028
(2021/12/03)
-
- PROCESS FOR THE HYDROLYSIS OR ALCOHOLYSIS OF CYCLIC KETAL OR ACETAL GROUPS WITH CARBON DIOXIDE OR AN ALCOHOL
-
Process for the hydrolysis or alcoholysis of a ketal or acetal compound wherein a ketal or acetal compound comprising at least one ketal or acetal group and at least one amino group is reacted with carbon dioxide and water oran alcohol.
- -
-
Page/Page column 7
(2019/02/13)
-
- PROCESS FOR THE PREPARATION OF A 3-AMINO-1,2-PROPANDIOL AND DERIVATIVES THEREOF
-
Process for the preparation of a compound of formula (I) with R1 and R2 independently from each other representing hydrogen or a C1-to C10 alkyl group by a two-step process wherein the first step is an amination of the compound of formula (II) with an amino compound HNR1 R2 in the presence of hydrogen and resulting in the compound of formula (III) and the second step is a ring-cleaving of the compound of formula (III) giving the compound of formula (I).
- -
-
Page/Page column 9; 10
(2019/02/13)
-
- Production of Primary Amines by Reductive Amination of Biomass-Derived Aldehydes/Ketones
-
Transformation of biomass into valuable nitrogen-containing compounds is highly desired, yet limited success has been achieved. Here we report an efficient catalyst system, partially reduced Ru/ZrO2, which could catalyze the reductive amination of a variety of biomass-derived aldehydes/ketones in aqueous ammonia. With this approach, a spectrum of renewable primary amines was produced in good to excellent yields. Moreover, we have demonstrated a two-step approach for production of ethanolamine, a large-market nitrogen-containing chemical, from lignocellulose in an overall yield of 10 %. Extensive characterizations showed that Ru/ZrO2-containing multivalence Ru association species worked as a bifunctional catalyst, with RuO2 as acidic promoter to facilitate the activation of carbonyl groups and Ru as active sites for the subsequent imine hydrogenation.
- Liang, Guanfeng,Wang, Aiqin,Li, Lin,Xu, Gang,Yan, Ning,Zhang, Tao
-
supporting information
p. 3050 - 3054
(2017/03/14)
-
- A process for the preparation of amino-glycerol
-
The invention belongs to the chemical field, particularly relates to a production and synthesis technology of a medical intermediate, and provides a preparation method of 3-amino-1,2-propanediol mainly aiming at a 3-amino-1,2-propanediol product. The preparation method of 3-amino-1,2-propanediol adopts epichlorohydrin and ammonia water as the main raw materials, a two-component catalyst is used in a hydrolysis reaction process and an ammoniation reaction process respectively, the reaction temperature in earlier period and later period in a hydrolysis reaction kettle is increased in a segmented manner, the reaction selectivity is improved, side effects are reduced, the reaction rate is increased, the reaction time is shortened, and energy consumption is reduced. The specific operation flow of the preparation method comprises the hydrolysis reaction, neutralization, distillation, ammoniation reaction, filtering, distillation, centrifugation and rectification. Meanwhile, the catalyst can be recycled and the cost can be saved, and the preparation method further has the advantages of high safety, stable product quality, high purity and the like.
- -
-
Paragraph 0017; 0023-0025
(2017/02/09)
-
- Method for preparing polyamine by direct ammoniation of polyhydroxy compound
-
A method for preparing polyamine by direct ammoniation of a polyhydroxy compound is disclosed. By using a polyhydroxy compound, ammonia gas or liquefied ammonia as a raw material and using a carrier-loaded liquid-phase reduced transition metal as a catalyst, an ammoniation reaction of the polyhydroxy compound under mild conditions is realized. The catalyst has high selectivity of polyamine. The catalyst can be recovered and recycled.
- -
-
Paragraph 0046; 0047; 0061; 0062
(2016/10/24)
-
- PROCESS FOR THE PRODUCTION OF AMINO ALCOHOLS
-
The present invention relates to a process for the manufacture of APD and N-alkyl-APD wherein 1-CPD is reacted with aqueous ammonium or aqueous alkyl-amine under alkaline conditions and where the process is conducted in a continuous manner in a reactor comprising a tubular reactor wherein at least two reaction zones are established.
- -
-
Page/Page column 7-8
(2012/08/28)
-
- Pyrazolopyrimidines as therapeutic agents
-
The present invention is directed to pyrazolopyrimidine derivatives of formula (I) wherein the substituents are defined herein, which are useful as kinase inhibitors and as such are useful for affecting angiogenesis and diseases and conditions associated with angiogenesis.
- -
-
-
- Process for the preparation of n,n'-bis[2,3-dihydroxypropyl]-5-[(hydroxyacetyl) methylamino]-2, 4,6-triiodo-1, 3-benzenedi carboxamide
-
A novel process for the preparation of N,N′-bis[2,3-dihydroxypropyl]-5-[(hydroxyacetyl) methylamino]-2,4,6-triiodo-1, 3-benzenedi carboxamide of formula (I), commonly known as lomeprol, a novel non-ionic contrast agent which shows very good safety and contrast effectiveness.
- -
-
-
- Pyrazolopyrimidines as therapeutic agents
-
The present invention provides compounds of Formula I, including pharmaceutically acceptable salts and/or prodrugs thereof, where G, R2, and R3 are defined as described herein.
- -
-
-
- A process for the prepration of a dihydroxyamino compound
-
Disclosed are a process for the preparation of a dihydroxyamino compound in which water and discoloring ingredients are removed while preventing decomposition of a dihydroxyamino compound by distilling a crude reaction liquid containing an epoxy compound and an amino compound at a specified temperature and pressure, a process for improving a yield of a dihydroxyamino compound having high purity by recirculating an aqueous solution of an amino compound recollected from a crude reaction liquid into a reaction step, and a process in which there are prevented discoloration and a yield decline of a dihydroxyamino compound.
- -
-
Page 15-16; 21-23
(2008/06/13)
-
- A PROCESS FOR THE PREPARATION OF 5- ACETYL (2,3-DIHYDROXYPROPYL)AMINO]-N,N'-BIS (2,3-DIHYDROXYPROPYL)-2,4,6- TRIIODO-1,3-BENZENEDICARBOXAMIDE
-
A process for the preparation of 5-[acetyl(2,3-dihydroxypropyl)amino]-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide of formula (I), starting from 5-amino-1,3-benzenedicarboxylic acid of formula (II), comprising the following steps: step a) is the reaction in heterogeneous phase between 5-amino-2,4,6-triiodo-1,3-benzenedicarboxylic acid and thionyl chloride in a solvent selected from the group consisting of: straight or branched (C7-C16) hydrocarbons, (C7-C8) aromatic hydrocarbons, 1,1,1-trichloroethane, n-butyl acetate, diglyme (diethylene glycol dimethyl ether), in the presence of catalytic amounts of a tertiary amine, to give compound (III); step b) is the acetylation reaction of compound (III) with glacial acetic acid both as the solvent and the reagent and thionyl chloride; step c) is the formation of compound (V) by reaction of the compound (IV) with 1-amino-2,3-propanediol, by reaction of compound (IV) in a dipolar aprotic solvent, selected from the group of dimethylformamide (DMF), dimethylacetamide (DMA), dimethylsulfoxide (DMSO) or N-methyl-pyrrolidinone; step d) is the alkylation of the compound (V) in aqueous solution at basic pH, by addition of a sodium hydroxide-calcium hydroxide mixture, with 3-chloro-1,2-propanediol or epichlorohydrin, at a temperature of 40-90 DEG C.
- -
-
-
- Process for the preparation of 5-(acetyl(2,3-dihydroxypropyl)amino-N,N-bis(2,3-dihydroxypropyl)-2,4,6-t riiodo
-
A process for the preparation of 5-[acetyl(2,3-dihydroxypropyl)amino]-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide of formula (I), starting from 5-amino-1,3-benzenedicarboxylic acid of formula (II), comprising the following steps: step a) is the reaction in heterogeneous phase between 5-amino-2,4,6-triiodo-1,3-benzenedicarboxylic acid and thionyl chloride in a solvent selected from the group consisting of: straight or branched (C7 -C16) hydrocarbons, (C7 -C8) aromatic hydrocarbons, 1,1,1-trichloroethane, n-butyl acetate, diglyme (diethylene glycol dimethyl ether), in the presence of catalytic amounts of a tertiary amine, to give compound (III); step b) is the acetylation reaction of compound (III) with glacial acetic acid both as the solvent and the reagent and thionyl chloride; step c) is the formation of compound (V) by reaction of the compound (IV) with 1-amino-2,3-propanediol, by reaction of compound (IV) in a dipolar aprotic solvent, selected from the group of dimethylformamide (DMF), dimethylacetamide (DMA), dimethylsulfoxide (DMSO) or N-methyl-pyrrolidinone; step d) is the alkylation of the compound (V) in aqueous solution at basic pH, by addition of a sodium hydroxide-calcium hydroxide mixture, with 3-chloro-1,2-propanediol or epichlorohydrin, at a temperature of 40-90° C.
- -
-
-
- Synthesis and Hydrolytic Lability of α-Phenoxyacetamides Containing Hydroxy Groups in the N-alkyl Residue
-
Secondary and tertiary amides of 3,5-biscarbonyl>phenoxyacetic acid bearing hydroxy groups in positions β (β-OH) and γ (γ-OH) relative to the acetamide nitrogen atom have been synthesized.Such amides easily undergo cleavage of the acetamide bond in water at neutral pH.Hydrolysis rate constant for a series of such amides and protonation constants for the corresponding leaving amines were determined.No simple correlation between the two parameters could be found.A study of the dependence of these parameters on the structural features of the substrates, such as the presence of an N-methyl group and number of β-OH and γ-OH groups, was carried out.All these features lead to enhancement of the amide hydrolysis rate and a synergistic effect is operative when both N-methyl and β-OH groups are contained in the substrate.Presence of a methyl group increases the basicity of amines whereas β-OH and γ-OH groups have the opposite effect.Mechanistic speculations seem to indicate that the abnormal lability of the acetamide bond is due to protic-like catalysis by an intramolecular OH...N hydrogen bond.
- Anelli, Pier Lucio,Brocchetta, Marino,Canipari, Sonia,Losi, Pietro,Manfredi, Giuseppe,et al.
-
p. 135 - 142
(2007/10/03)
-
- The reaction of sulfamic acid derivatives with epoxides. 4. Hydrolysis of 3-chloro-2-hydroxypropylsulfamates
-
Under basic hydrolysis conditions 3-chloro-2-hydroxypropylsulfamates transform into 2,3-dihydroxypropylsulfamates. Acidic hydrolysis of the latter leads to 3-alkylaminopropane-1,2-diols.
- Tartakovsky,Ermakov,Mal'chevsky,Kulikova
-
p. 2667 - 2668
(2007/10/03)
-
- Process for the preparation of hydroxyamines
-
A process for the production of hydroxyamines of the formula I wherein R1 and R2 independently of one another are H or CH2 OH and R3 is H, C1 -C4 -alkyl or C1 -C4 -hydroxyalkyl comprising reacting an oxo compound with an amine and reducing the resultant ketimine with a reducing agent.
- -
-
-
- Solubilized platinum (II) complexes
-
There are described platinum-polyhydroxylated amine compounds which exhibit anti-tumor activity in mammalian species. The products are highly soluble in aqueous solutions and they may be administered either orally or in parenteral form.
- -
-
-