CAS: 107-40-4; 2,4,4-Trimethyl-2-Pentene

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CAS号115-11-7 2-甲基丙烯 | CAS号5162-48-1 2,2,4-三甲基-3-戊醇 | CAS号67-64-1 丙酮 | CAS号187737-37-7 propene | CAS号815-24-7 2,2,4,4-四甲基-3-戊酮 | CAS号513-37-1 1-氯-2-甲基-1-丙烯 | CAS号594-19-4 叔丁基锂 | CAS号690-37-9 2,4,4-三甲基-2-戊醇 | CAS号999-78-0 4,4-二甲基-2-戊炔 | CAS号141-59-3 1,1,3,3-四甲基-1-丁硫醇 | CAS号21020-30-4 2,5,5-trimethyl... | CAS号630-19-3 三甲基乙醛 | CAS号67-64-1 丙酮 | CAS号115-11-7 2-甲基丙烯 | CAS号75-98-9 三甲基乙酸 | CAS号64512-96-5 2,3-Pentanediol... | CAS号106-98-9 正丁烯 | CAS号590-18-1 顺-2-丁烯 | CAS号187737-37-7 propene

📜2,3-Dibromo-2,4,4-Trimethyl-Pentane置于iron(II) Chloride 频哪酮,18-冠醚-6,Potassium Tert-Butylate体系中,用 正己烷,二甲基亚砜 用作溶剂,化学反应 3.0H,反应生成2,4,4-三甲基-2-戊烯
参考文献:Competition Of Mechanisms In Nucleophilic Substitution Of Vinyl Halides. An Unequivocal Example Of The Vinylic Srn1 Route1
标题:Competition Of Mechanisms In Nucleophilic Substitution Of Vinyl Halides. An Unequivocal Example Of The Vinylic Srn1 Route1
摘要:In A Search For An Unambiguous Example Of The Vinylic S(Rn)1 Route,Several Vinyl Bromides And Iodides Were Reacted Mostly With (-)Ch(2)Cocme(3),And Sometimes With (-)Ch(2)Coph,(Ch)-C--(Me)Coet,And (Eto)(2)Po-Ions,Under Fe2+-Or Photostimulation In Me(2)So. Vinyl Halides Having Vinylic Hydrogens,Such As Beta-Bromostyrene,Gave Acetylenic Products,E.G.,Phenylacetylene Or A Tertiary Phc=c-Substituted Alcohol,Whereas Vinyl Halides With Allylic Hydrogens,Such As Me(2)C=c(I)Chme(2),Gave A Substituted Allene. Reduction Products Of The Halogen,As Well As Substitution And Rearranged Substitution Products,Were Also Formed. The Operation Of Ionic Elimination-Addition Routes Accounts For Formation Of Most Of The Products,While The Reduction Products Arise From An Intermediate Vinyl Radical. Ph(2)C=c(Br)Ph (20) And Me(2)C=c(Br)Ph (25) Gave Both Substitution And Reduction Products,But Me(2)C=c(Br)-T-Bu (23) Gave Only A Reduction Product. Formation Of Substitution Products From The Conjugated 20 And 25 Was Ascribed To A Reaction Via A Vinylic S(Rn)1 Route,While Lack Of Substitution In 23 Is Related To Its Nonconjugated System And To The Consequent Higher Energy That The Radical Anion Of The Substitution Product Would Have. The One Here Reported Seems To Be The First Case Of An Exclusive Genuine Vinylic S(Rn)1 Process.
Doi:10.1021/jo00101A045

专利信息

专利号:US-8569560-B2
优先权日:2006-10-13
标题 :Synthesis of terminal alkenes from internal alkenes via olefin metathesis
发明人：SCHRODI YANN; PEDERSON RICHARD L; KAIDO HIROKI; TUPY MICHAEL J
权利人:ELEVANCE RENEWABLE SCIENCES
摘要:This disclosure relates generally to olefin metathesis, and more particularly relates to the synthesis of terminal alkenes from internal alkenes using a cross-metathesis reaction catalyzed by an olefin metathesis catalyst. According to one aspect, for example, a method is provided for synthesizing a terminal olefin, the method comprising contacting, in the presence of a ruthenium alkylidene metathesis catalyst, an olefinic substrate comprised of at least one internal olefin with a cross metathesis partner comprised of an alpha olefinic reactant, under reaction conditions effective to allow cross-metathesis to occur, wherein the reaction conditions include a reaction temperature of at least 35° C. The methods, compositions, reactions and reaction systems herein disclosed have utility in the fields of catalysis, organic synthesis, and industrial chemistry.

专利号:US-9255117-B2
优先权日:2006-07-13
标题 :Synthesis of terminal alkenes from internal alkenes and ethylene via olefin metathesis
发明人：SCHRODI YANN
权利人:MATERIA INC
摘要:This invention relates generally to olefin metathesis, and more particularly relates to the synthesis of terminal alkenes from internal alkenes using a cross-metathesis reaction catalyzed by a selected olefin metathesis catalyst. In one embodiment of the invention, for example, a method is provided for synthesizing a terminal olefin, the method comprising contacting an olefinic substrate comprised of at least one internal olefin with ethylene, in the presence of a metathesis catalyst, wherein the catalyst is present in an amount that is less than about 1000 ppm relative to the olefinic substrate, and wherein the metathesis catalyst has the structure of formula (II) n nwherein the various substituents are as defined herein. The invention has utility, for example, in the fields of catalysis, organic synthesis, and industrial chemistry.

专利号:US-5780689-A
优先权日:1991-07-10
标题 :Superacidic catalysts for the synthesis of methyl-tert-butyl ether (MTBE)
发明人：MAO RAYMOND LE VAN
权利人:QUEBECOISE D INITIATIVES PETRO
摘要:In accordance with the present invention, there is now provided a novel selective catalyst useful for the synthesis of methyl-tert-butyl ether (MTBE) or ethyl-tert-butyl ether (ETBE) prepared by reacting isobutene with methanol or ethanol, respectively. More specifically, the catalyst of the present invention comprises from about 0.5 to about 7% by weight of triflic acid (trifluoro-methanesulfonic acid, CF3SO3H, hereafter referred to as TFA) incorporated onto an acid form Y zeolite.

专利号:EP-0909792-B1
优先权日:1997-10-15
标 题:Storage-stable composition for the synthesis of polyurethanes
发明人：BAUMANN EDWIN; HAEBERLE KARL DR; HORN PETER DR; TREULING ULRICH DR; SCHWAEBISCH HANS
权利人:BASF AG
摘要:Polyurethane synthesis composition using a polymeric emulsifier having a backbone consisting of a copolymer of 4-12C unsaturated dicarboxylic acid or anhydrides and 2-40C olefins, with polyoxyalkylene side chains derived from 2-20C oxiranes. A polyurethane (PU) synthesis composition containing, as emulsifier, a polymer (T) with (at least) a copolymer backbone (TR) derived from 4-12 carbon(C) unsaturated dicarboxylic acid(s) and/or their anhydrides (TR1) and 2-40 C olefin(s) (TR2), and having polyalkylene oxide side chain (TP) derived from 2-20 C oxirane(s) (TP1), together with at least two compounds (a) comprising at least two reactive hydrogen atoms, at least one of which is insoluble. Independent claims are also included for: (a) a process for the production of synthesis composition by contacting the components in presence of a polymer; (b) a PU synthesis composition obtained; (c) a polyurethane obtained by bringing the synthesis composition into contact with a polyisocyanate; and (d) moldings, fibers, coatings, paint, sheets and a foam made from the PU compositions.

专利号:US-10669160-B2
优先权日:2018-04-30
标题:Heterogeneous wet synthesis process for preparation of high purity tungsten pentahalide
发明人：LIU YUMIN; LI FENG; WAN ZHIWEN; FAFARD CLAUDIA; WIESE STEFAN; HUSSON GUILLAUME; NIKIFOROV GRIGORY; SUI BIN; GIRARD JEAN-MARC
权利人:AIR LIQUIDE; AIR LIQUIDE AMERICAN
摘要:Synthesis of tungsten pentahalide compositions having low impurity profiles are disclosed. The specific impurity profile permits deposition of high purity tungsten-containing films using vapor deposition processes or other semiconductor manufacturing processes without introduction of performance-impacting contaminants.

专利号:US-9988349-B2
优先权日:2014-01-03
标 题:Direct stereospecific synthesis of unprotected aziridines from olefins
发明人：ESS DANIEL HALSELL; FALCK JOHN RUSSELL; JAT JAWAHAR LAL; KURTI LASZLO
权利人:ESS DANIEL HALSELL; FALCK JOHN RUSSELL; JAT JAWAHAR LAL; KURTI LASZLO
摘要:A method for the direct stereospecific conversion of structurally diverse mono-, di-, tri- and tetra-substituted olefins to N—H, N-alkyl, N-cycloalkyl, or N-aralkyl aziridines using a hydroxylamine amination agent with transition metal catalyst. The method is operationally simple (i.e., one-pot), scalable and fast at ambient temperature.