CAS: 1879-09-0; 2-(Tert-Butyl)-4,6-Dimethylphenol

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CAS号105-67-9 2,4-二甲基苯酚 | CAS号115-11-7 2-甲基丙烯 | CAS号128-37-0 抗氧剂BHT | CAS号118-82-1 4,4′-亚甲基双(2,6-二... | CAS号955-01-1 2,6-ditert-buty... | CAS号67-56-1 甲醇 | CAS号119-47-1 抗氧剂2246 | CAS号2219-82-1 2-叔丁基-6-甲基苯酚 | CAS号75-65-0 叔丁醇 | CAS号27996-19-6 6-tert-butyl-2-... | CAS号1707-75-1 1,1-二苯基-2-苦味酰肼 | CAS号762-84-5 N-叔丁基乙酰胺 | CAS号139656-52-3 4-tert-butyl-2,... | CAS号105-67-9 2,4-二甲基苯酚 | CAS号115-11-7 2-甲基丙烯 | CAS号23500-79-0 2-叔丁基-3-氯甲基-4,6... | CAS号64833-91-6 2-tert-butyl-4,... | CAS号93982-04-8 3-(bromomethyl)...

5,11,17,23-Tetratert-Butyl-4,12,16,24-Tetrahydroxycalix[4]Arene Ethanol Complex置于zinc(II) Oxide,Sodium Hydroxide体系中,化学反应 8.0H,反应生成2,4-二甲基-6-叔丁基苯酚
参考文献:About Selective Methods Of Synthesis Of 6-Tert-Butyl-2-Methylphenol And 6-Tert-Butyl-2,4-Dimethylphenol
标题:About Selective Methods Of Synthesis Of 6-Tert-Butyl-2-Methylphenol And 6-Tert-Butyl-2,4-Dimethylphenol
摘要:Vapor Phase Catalytic Methylation With Methanol Of 2-Tert-Butylphenol At The Temperature 280-300A Degrees C Proceeds Selectively With Formation Of 6-Tert-Butyl-2-Methylphenol. Elevating Reaction Temperature Above 300A Degrees C Leads To Formation Of 2,6-Dimethylphenol. Reaction Of 2-Tert-Butylphenol With Methanol In Alkaline Medium In The Presence Of Zinc Oxide Is Shown To Lead Initially To Formation Of A Mixture Of Calixarenes And Methylenebisphenols That At Elevated Temperature Exert Splitting Leading In Future To 6-Tert-Butyl-2,4-Dimethylphenol. Obtaining It In This Reaction From 2,2'-Methylenebis-(6-Tert-Butyl-4-Methylphenol) Proceeds Selectively. Pathways Of The Reductive Methylation Of Methylenebisphenols With Methanol In Alkaline Medium Is Considered.
Doi:10.1134/s1070363209060218

专利信息

专利号:US-12338202-B2
优先权日:2021-09-10
标 题 :One pot synthesis of urea (meth)acrylates
发明人：BESTGEN SEBASTIAN; BEYER SILVIA
权利人:EVONIK OPERATIONS GMBH
摘要:A one-pot synthesis of polymerizable and acyclic urea (meth)acrylates, preferably mono(meth)acrylates, can be performed via in-situ synthesis of urea alcohols or amines followed by direct reaction with a (meth)acrylate reactive diluent. The urea alcohol/amine is obtained from isocyanates and alcohols, amines, or hydroxyamines. Subsequently, the reaction with the (meth)acrylate reactive diluent takes place and the urea (meth)acrylate is directly obtained either in solution with the reactive diluent, or as a pure material after removal of the reactive diluent.

专利号:US-6329543-B1
优先权日:1999-05-06
标题:Process for synthesis of isobornyl (Meth) acrylate
发明人：KNEBEL JOACHIM; SAAL DORIS
权利人:ROEHM GMBH
摘要:The present invention relates to processes for synthesis of isobornyl (meth)acrylate by reacting camphene with (meth)acrylic acid in the presence of sulfuric acid and at least one compound having inhibiting action. Aqueous sulfuric acid with an acid concentration in the range of 65 to 85 wt % is used. Isobornyl (meth)acrylate can advantageously be distilled from a mixture containing sulfuric acid in the presence of 2,6-di-tert-butyl-alpha-(dialkylamino)-p-cresol.

专利号:US-2009318592-A1
优先权日:2005-10-11
标 题 :Process for the Synthesis of Amine Ethers
发明人：FREY MARKUS; BROENNIMANN VALERIE
权利人:CIBA GEIGY CORP
摘要:The present invention relates to novel processes for the preparation of a sterically hindered amine ether by reacting a corresponding sterically hindered amine oxide with a ketone or an aldehyde with at least one reactive H in the presence of a peroxydisulphate. Products obtained by this process may be hydrogenated. The compounds made by these processes are particularly effective in the stabilization of polymer compositions against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.

专利号:US-9969670-B2
优先权日:2014-01-20
标题 :Synthesis of (meth) acrylic anhydride by transanhydrization
发明人：ARDAUD PIERRE; VIDAL THIERRY; RACHED RABIH
权利人:RHODIA OPERATIONS
摘要:The invention relates to a method for producing a (meth)acrylic anhydride A-C(â•?O)—O—(Oâ•?)C-A, comprising the following steps: a) a step of reacting an anhydride B—C(â•?O)—O—(Oâ•?)C—B with an acid A-COOH, resulting in the formation of mixed anhydride A-C(â•?O)—O—(Oâ•?)C—B and acid B—COOH; and b) a step of reacting the mixed anhydride with A-COOH, resulting in the (meth)acrylic anhydride. According to the invention, reaction steps (a) and (b) are carried out in the presence of hydrated triflic acid, and the anhydride A-C(â•?O)—O—(Oâ•?)C-A is isolated from the reaction medium produced in step (b) as follows: e1) heavy compounds having a volatility less than or equal to that of the anhydride A-C(â•?O)—O—(Oâ•?)C-A are separated from the reaction medium, said compounds including the anhydride and the hydrated triflic acid; e2) the anhydride is separated from the heavy compounds by diffeence in volatility.

专利号:US-2007191516-A1
优先权日:2004-03-15
标题 :Process for the synthesis of amine ethers
发明人：FREY MARKUS; RAST VALERIE; BRAIG ADALBERT; KRAMER ANDREAS
权利人:FREY MARKUS; RAST VALERIE; BRAIG ADALBERT; KRAMER ANDREAS
摘要:A process for the preparation of a sterically hindered amine ether which comprises reacting a corresponding sterically hindered aminoxide with a C 5 -C 18 alk-1-ene in the presence of an organic hydroperoxide and optionally hydrogenating the resulting product as well as the product mixtures obtained therewith and their use as stabilizers and flame retardants.

专利号:US-12098124-B2
优先权日:2019-04-16
标 题:Acid catalyzed synthesis of methyl acrylate from acrylic acid and methanol
发明人：CHAKRABARTI REETAM; NGO MINH N; ELDER JAMES
权利人:ROHM & HAAS
摘要:A method for preparing methyl acrylate comprises:a) heating in a reaction zone a mixture comprising acrylic acid, methanol, and an acid catalyst to react and form a reaction product comprising methyl acrylate which is vaporized with other light components and then fed to a distillation zone, wherein a feed stream entering the reaction zone comprises methanol to acrylic acid in a molar ratio of greater than 1 and less than 2, and a residence time in the reaction zone ranges from 0.25 to 2 hours;b) condensing and phase-separating a distillate from the distillation zone to form an organic phase comprising methyl acrylate and an aqueous phase;c) returning a portion of the organic phase to the distillation zone as organic reflux; andd) feeding the remainder of the organic phase and the aqueous phase of the distillation zone to an extraction column to form a methanol rich aqueous effluent and an organic effluent comprising methyl acrylate.