CAS: 118-82-1; 4,4'-Methylenebis(2,6-Di-Tert-Butylphenol)

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2,6-二叔丁基-4-溴甲基苯酚置于三乙胺体系中,用 正戊烷 用作溶剂,化学反应生成抗氧剂 702
参考文献:Reinvestigation Of The Reaction Of 2,6-Di-Tert-Butylbenzoquinone Methide And 2,6-Di-Tert-Butylphenol
标题:Reinvestigation Of The Reaction Of 2,6-Di-Tert-Butylbenzoquinone Methide And 2,6-Di-Tert-Butylphenol
摘要:The Reaction Of Quinone Methide 1 And Phenol 2 In Equimolar Amounts Was Investigated In Pentane At 30-Degrees-C. Products Were Isolated By Means Of Column Chromatography On Sio2. There Was A Marked Difference In Product Distribution Between The Reactions In The Presence And Absence Of Added Et3N. Dienones 3 And 10 Were Obtained Only From The Former Reaction,While Formation Of 1,2-Bis(4-Hydroxyphenyl)Ethane 18 And 4,4'-Dihydroxybiphenyl 20 Was Overwhelming In The Latter Reaction. Other Products From Both Reactions Were Relatively Small Quantities Of 4,4'-Stilbenequinone 17,4,4'-Diphenoquinone 21,And Bis(4-Hydroxyphenyl)Methane 24,But Dienone 4 Was Not Obtained. Compounds 20 And 24 Obtained From The Latter Reaction Were Formed By Isomerization Of Dienones 19 And 23,Respectively,During The Chromatography. The Reaction Is Initiated By Dimerization Of 1 To Generate Biradical 11. Subsequent Processes Involving Hydrogenation-Dehydrogenation,Coupling-Dissociation,And Dienone-Phenol Rearrangement Account For The Formation Or The Lack Of Formation Of The Products. The Difference In Product Distribution Is Ascribed To Capability Of Et3N To Catalyze The Isomerization. Quinone Methide 1 Also Adds To 2 To Give 23. The Decay Of 1 In The Presence Of Both 2 And Phenol 6 Gave Dienone 8 Additionally. The Formation Of 24 And 4 Was Facilitated By Conducting The Reaction Of 1 And 2 In Dmso. Dehydrogenation Of 10 And 3 With Pbo2 Afforded Spirodienones 27 And 28,Respectively. Compounds 27 And 28 Were Unstable,And Their Decay In Solution Was Investigated In The Presence Or Absence Of Added 2. The Results Show That The Decay Is Initiated By Homolytic Scission Of The C-C Bond Connecting The Dienone Rings In The Cyclopentane (In 27) And Cyclohexane (In 28) Rings. Compound 28 Is Novel In That It Bears Two Kinds Of Such C-C Bonds. Reversibility Of The Dimerization Of 1 Is Suggested.
Doi:10.1021/jo00027A053

专利信息

专利号:EP-0062322-A1
优先权日:1981-04-03
标 题 :Improved process for synthesis of hindered amine stabilizers for polymeric materials
发明人：LAI JOHN TA-YUAN
权利人:GOODRICH CO B F
摘要:Process for the synthesis of hindered polysubstituted α-amino acetamides by reaction of a secondary amine with an α-halo acetamide in a basic organic reaction medium and in the presence of a phase transfer catalyst. The product thus obtained can comprise a multifunctional compound having one or more hindered amino moieties. These compounds are highly effective as UV stabilizers in a variety of plastics, especially the alpha monoolefins.

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-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-5177235-A
优先权日:1992-06-11
标题 :Synthesis of tetraalkylsilanes
发明人：EISENBERG DAVID C; ROBINSON GENE C
权利人:ETHYL CORP
摘要:This invention relates to a process for preparing tetrahydrocarbylsilane in high yield, comprising: a) forming a reaction mass from molten metal and trihydrocarbylaluminum, in an hydrocarbon solvent under an inert gas atmosphere; b) maintaining the reaction mass at a temperature in the range of from about 100° to about 130° C. for a period of time sufficient to form sodium tetrahydrocarbylaluminate; c) contacting the sodium tetrahydrocarbylaluminate with organotrihalosilane; and d) heating the contacted tetrahydrocarbylaluminate and organotrihalosilane to a temperature and for a period of time sufficient to form the tetrahydrocarbylsilane, wherein the tetrahydrocarbylaluminate and tetrahydrocarbylsilane are formed at a pressure of less than about 3000 KPa and wherein the hydrocarbyl group of the tetrahydrocarbyl silane is one or a mixture of hydrocarbyl groups having less than about 8 carbon atoms each.

专利号:US-7402675-B2
优先权日:2000-05-26
标题 :Process for the synthesis of amine ethers from secondary amino oxides
发明人：HAFNER ANDREAS; KIRNER HANS JUERG; SCHWARZENBACH FRANZ; VAN DER SCHAAF PAUL ADRIAAN; NESVADBA PETER
权利人:CIBA SC HOLDING AG
摘要:An amine ether of formula A n nwherein a is 1 or 2; and when a is 1, E is E′; when a is 2, E is L;n E′ is C 1 -C 36 alkyl; C 3 -C 18 alkenyl; C 2 -C 18 alkinyl; C 5 -C 18 cycloalkyl; C 5 -C 18 cycloalkenyl; a radical of a saturated or unsaturated aliphatic bicyclic or tricyclic hydrocarbon of 7 to 12 carbon atoms; C 2 -C 7 alkyl or C 3 -C 7 alkenyl substituted by halogen; C 7 -C 15 aralkyl or C 7 -C 15 aralkyl substituted by C 1 -C 4 alkyl or phenyl; or E′ is a radical of formula (VII) as explained in claim 1; T′ is tertiary C 4 -C 18 alkyl or phenyl, each of which are unsubstituted or substituted by halogen, OH, COOR 21 or C(O)—R 22 ; or T′ is C 5 -C 12 cycloalkyl; C 5 -C 12 cycloalkyl which is interrupted by at least one O or —NR 18 —; a polycyclic alkyl radical having 7-18 carbon atoms, or the same radical which is interrupted by at least one O or —NR 18 —; or T′ is —C(G 1 )(G 2 )-T″; or C 1 -C 18 alkyl or C 5 -C 12 cycloalkyl substituted by n n n n n n n n n n n n T″ is hydrogen, halogen, NO 2 , cyano, or is a monovalent organic radical comprising 1-50 carbon atoms; n or T″ and T′ together form a divalent organic linking group completing, together with the hindered amine nitrogen atom and the quaternary carbon atom substituted by G 1 and G 2 , an optionally substituted five- or six-membered ring structure; and all other residues are as defined in claim 1, n are obtained in good yield from the corresponding N-oxyl hindered amine precursor by reaction with a hydrocarbon E 1 -H or H-L-H in the presence of an organic hydroperoxide and a catalytic amount of copper or a copper compound. n n n n n The products of present process find utility as polymerization regulators and/or light stabilizers for organic material.

专利号:US-4473694-A
优先权日:1981-04-03
标 题:Process for the preparation of polysubstituted α-aminoacetamides
发明人：LAI JOHN T
权利人:GOODRICH CO B F
摘要:Process for the synthesis of hindered polysubstituted alpha -amino acetamides which comprises first reacting an alpha -haloacetamide with a base to form an intermediate alpha -lactam which in turn is reacted with a primary or secondary amine. The product thus obtained can comprise a multifunctional compound having one or more hindered amino moieties. These compounds are highly effective as UV stabilizers in a variety of plastics, especially the alpha monoolefins.