826-36-8Relevant articles and documents
Preparation of triacetoneamine, an improved method
Wu, Anxin,Yang, Weidong,Pan, Xinfu
, p. 3565 - 3569 (1996)
A new method for the preparation of triacetoneamine has been developed, in which, p-nitrotoluene is used as a catalyst, the yield of triacetoneamine is up to 65%.
Preparation method for synthesizing polymerization inhibitor 702 from acetone and ammonia gas through one-pot method
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Paragraph 0027-0030; 0036; 0038-0050, (2021/04/28)
The invention belongs to the technical field of polymerization inhibitor synthesis, and discloses a preparation method for synthesizing a polymerization inhibitor 702 from acetone and ammonia gas through a one-pot method. The preparation method comprises the following steps: adding acetone and a carrier catalyst into a reaction kettle, introducing ammonia gas, and conducting reacting at 50-60 DEG C for 2-6 hours; and then adding deionized water and hydrogen peroxide, conducting reacting at 15-40 DEG C for 1-3 hours, filtering the reaction solution, and carrying out reduced-pressure distillation on the obtained filtrate to obtain the polymerization inhibitor 702. According to the invention, reaction conditions are mild, the preparation method is simple and convenient, the carrier catalyst is easy to separate, and product yield is high.
HETEROGENEOUS CATALYZED PROCESS FOR THE PRODUCTION OF 2,2,6,6-TETRAMETHYL-4-PIPERIDONE
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Page/Page column 22, (2020/12/11)
The present invention relates to a process for the production of 2,2,6,6-tetramethyl-4-piperidone particularly comprising (i) providing a reactor containing a catalyst comprising a zeolitic material having a framework structure of FAU, wherein the zeolitic material comprises YO2 and X2O3 in its framework structure, wherein Y is a tetravalent element and X is a trivalent element, wherein the zeolitic material has an YO2 to X2O3 molar ratio of 16 to 175; (ii) preparing a reaction mixture comprising acetone and ammonia; (iii) contacting the catalyst in the reactor with the reaction mixture prepared in (ii) at a temperature in the range of from 40 to 250 °C for obtaining a reaction product comprising 2,2,6,6-tetramethyl-4-piperidone; wherein the mixture prepared in (ii) and contacted with the catalyst in (iii) contains less than 10 weight-% of water based on 100 weight-% of the reaction mixture.
Method for preparing triacetone amine
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Paragraph 0133-0144, (2020/07/05)
An improved method is used for preparing triacetone amine while recycling the by-products. This involves treating the crude product from triacetone amine preparation, which leads to an increase in the content of compounds which react readily with ammonia. This method enables efficient recycling of the by-products formed in the synthesis of triacetone amine.
Method for preparing intermediate 2,2,6,6-tetramethyl-4-piperidylamine
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Paragraph 0039; 0040; 0041; 00443;, (2019/12/25)
The invention relates to a method for preparing intermediate 2,2,6,6-tetramethyl-4-piperidylamine. The method is characterized by comprising the following steps: step 1), in the presence of a catalyst1, reacting acetone with ammonia gas to produce 2,2,6,6-tetramethyl-4-piperidinone and water; and step 2), in the presence of a catalyst 2, reacting the 2,2,6,6-tetramethyl-4-piperidinone with ammonia gas to produce 2,2,6,6-tetramethyl-4-piperidylimine and water, and reacting the 2,2,6,6-tetramethyl-4-piperidylimine with hydrogen gas to produce the 2,2,6,6-tetramethyl-4-piperidylamine, wherein the catalyst 1 is ammonium nitrate, and the catalyst 2 is a sodium hydroxyphenyl phosphate modified framework nickel catalyst. The method provided by the invention has the advantages of short synthetictime, a high conversion rate of the acetone and a high repeating utilization rate of the raw materials.
A 2, 2, 6, 6 - tetramethyl -4 - piperidone preparation method (by machine translation)
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Paragraph 0052-0062; 0065-0070; 0071-0076; 0077-0088, (2018/05/16)
The invention provides a 2, 2, 6, 6 - tetramethyl - 4 - piperidone of preparation method, include acetone with a disaccharide modified UiO - 66 catalyst is added to the reaction in the device, in order to acetone with ammonia (3 - 12): 1 molar ratio of the ammonia gas, in the 50 - 80 °C reaction, after the reaction, the temperature, pressure, filtering, rectification to get 2, 2, 6, 6 - tetramethyl - 4 - piperidone; the invention also provides a method for the preparation of the sulfonic acid-modified with the appropriate Acid with the channel pore size of the metal-organic framework material of the novel catalyst and its application. The method of the invention with green, economic and high efficiency, at the same time the catalyst of the invention shows excellent stability and selectivity. (by machine translation)
Secondary Phosphine Oxides as Multitalented Preligands En Route to the Chemoselective Palladium-Catalyzed Oxidation of Alcohols
Vasseur, Alexandre,Membrat, Romain,Gatineau, David,Tenaglia, Alphonse,Nuel, Didier,Giordano, Laurent
, p. 728 - 732 (2017/03/13)
Secondary phosphine oxides O=PHR2 (SPOs) were identified as multitalented preligands for the chemoselective Pd-catalyzed oxidation of alcohols by a hydrogen-abstracting methodology. SPOs were found to promote the hydrogen-abstraction step as well as hydrogen transfer to a Michael acceptor by generating a putative active H?Pd species. The catalytic system operates under neutral conditions and was proven to be compatible with various electrophilic and nucleophilic functionalities within the substrates as well as water- and air-sensitive functional groups.
A 2, 2, 6, 6-tetramethyl-4-PIPERIDYLAMINES method for the preparation of
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Paragraph 0028-0036, (2017/04/11)
The invention discloses a method for preparing 2,2,6,6-tetramethyl-4-piperidinamine. The method comprises the following steps: synthesizing 2,2,6,6-tetramethyl-4-piperidone and carrying out a hydrogenation reaction of the 2,2,6,6-tetramethyl-4-piperidone. The key synthesis steps are controlled, the addition amount for acetone recovery is controlled, and the rectification purity and conversion rate of the product are improved through the optimized distillation, crystallization and hydrogenation reduction process.
Continuous synthesis of triacetonamine over cation-exchange resin
Du, Xiaobao,Song, Ge,Tian, Jun,Li, Yang
, p. 541 - 543 (2015/03/03)
A continuous process for the synthesis of triacetonamine, which is the sole precursor of most hindered amine light stabilizers, from acetone and ammonia was carried out with NKC-9 cation-exchange resin in a fixed bed reactor. The plausible reaction mechanism was also discussed. The effect of different reaction parameters including molar ratio of reactants, gas hour space velocity and reaction temperature have been investigated to obtain the optimal conditions. The activity, selectivity and stability of the catalyst were demonstrated and a continuous process for production of triacetonamine from acetone and ammonia has been established.
METAL AMIDES OF CYCLIC AMINES
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Paragraph 0058; 0060, (2015/02/19)
Compounds, and oligomers of the compounds, are synthesized with cyclic amine ligands attached to a metal atom. These compounds are useful for the synthesis of materials containing metals. Examples include pure metals, metal alloys, metal oxides, metal nitrides, metal phosphides, metal sulfides, metal selenides, metal tellurides, metal borides, metal carbides, metal silicides and metal germanides. Techniques for materials synthesis include vapor deposition (chemical vapor deposition and atomic layer deposition), liquid solution methods (sol-gel and precipitation) and solid-state pyrolysis. Suitable applications include electrical interconnects in microelectronics and magnetoresistant layers in magnetic information storage devices. The films have very uniform thickness and high step coverage in narrow holes.
