CAS: 115-11-7; Isobutene

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溴甲烷置于zinc Aluminate,氢气体系中,200.0~450.0 °C,2.0 Mpa 条件下,反应 6.75H,反应生成异丁烯
参考文献:一种溴甲烷制异丁烯的方法
标题:一种溴甲烷制异丁烯的方法
摘要:本发明公开一种溴甲烷制异丁烯的方法,包括如下内容:溴甲烷制异丁烯催化剂首先经过含水蒸气的混合气氛下低温处理,然后再经含氢气的混合气氛活化,活化后催化剂中溴含量为活化前催化剂中溴含量的30%‑80%,活化后的催化剂与卤代烷烃接触获得异丁烯,所述溴甲烷制异丁烯催化剂,按催化剂的重量含量计,氧化锌含量为0.5%‑20%,溴化锌含量为10%‑50%,载体含量40%‑90%,所述载体为氧化铝,氧化硅,Zsm‑5分子筛等中的一种或几种.该方法可以高选择性生成异丁烯.

专利信息

专利号:US-11866398-B2
优先权日:2018-05-15
标 题:Total synthesis of prostaglandin J natural products by stereoretentive metathesis
发明人：LI JIAMING; CHEN XU; AHMED TONIA S; STOLTZ BRIAN M; GRUBBS ROBERT H
权利人:CALIFORNIA INST OF TECHN
摘要:This invention relates generally to the synthesis of Δ12-Prostaglandin J product using stereoretentive ruthenium olefin metathesis catalysts supported by dithiolate ligands. Δ12-Prostaglandin J products were generated with excellent selectivity (>99% Z) and in moderate to high/good yields (47% to 80% yield; 58% to 80% yield).

专利号:US-6794534-B2
优先权日:2000-06-23
标题:Synthesis of functionalized and unfunctionalized olefins via cross and ring-closing metathesis
发明人：GRUBBS ROBERT H; CHATTERJEE ARNAB K; MORGAN JOHN P; SCHOLL MATTHIAS; CHOI TAE-LIM
权利人:CALIFORNIA INST OF TECHN
摘要:The invention is directed to the cross-metathesis and ring-closing metathesis reactions between geminal disubstituted olefins and terminal olefins, wherein the reaction employs a Ruthenium or Osmium metal carbene complex. Specifically, the invention relates to the synthesis of α-functionalized or unfunctionalized olefins via intermolecular cross-metathesis and intramolecular ring-closing metathesis using a ruthenium alkylidene complex. The catalysts preferably used in the invention are of the general formula n wherein: n M is ruthenium or osmium; n X and X 1 are each independently an anionic ligand; n L is a neutral electron donor ligand; and, n R, R 1 R 6 , R 7 , R 8 , and R 9 are each independently hydrogen or a substituent selected from the group consisting of C 1 -C 20 alkyl, C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, aryl, C 1 -C 20 carboxylate, C 1 -C 20 alkoxy, C 2 -C 20 alkenyloxy, C 2 -C 20 alkynyloxy, aryloxy, C 2 -C 20 alkoxycarbonyl, C 1 -C 20 alkylthio, C 1 -C 20 alkylsulfonyl and C 1 -C 20 alkylsulfinyl.

专利号:US-2014255263-A1
优先权日:2011-08-17
标题:Apparatus for the liquid-phase synthesis of isoprene from isobutylene and formaldehyde
发明人：DYKMAN ARKADII SAMUILOVICH; SIBAGATULLIN GAMIL GABDRAHMANOVICH; FEDORCOVA ELENA VLADIMIROVNA; FLEGONTOV ALEKSEI MICHAILOVICH
权利人:DYKMAN ARKADII SAMUILOVICH; SIBAGATULLIN GAMIL GABDRAHMANOVICH; FEDORCOVA ELENA VLADIMIROVNA; FLEGONTOV ALEKSEI MICHAILOVICH; OBSHESTVO S OGRANICHENNOI OTVETSTVENNOSTIU NP OB EUROCHIM
摘要:The apparatus for liquid-phase synthesis of isoprene from isobutylene and formaldehyde, comprising the following units of synthesis of isoprene precursors: 1,3-dioxanes synthesis unit; unit for TMC synthesis from isobutylene-containing fraction; unit for TMC synthesis from recycled concentrated isobutylene derived either from isoprene synthesis unit or from the unit for synthesis products separation and isoprene monomer isolation; isoprene synthesis unit; by-products decomposition unit; unit for synthesis products separation and isoprene monomer isolation. The apparatus is characterized with separation of by-product fractions from 1,3-dioxanes synthesis unit; with assignment of light fraction for sale or its supply for combined decomposition with the by-products (MDHP fraction), formed during separation of synthesis products and isolation of isoprene monomer; with assignment of heavy fraction for sale, at that TMC and 1,3-dioxanes that were formed in the corresponding units are simultaneously supplied for combined decomposition to isoprene synthesis unit while the unit for separation of synthesis products and isolation of isoprene monomer is directly connected with isoprene synthesis unit, by-products decomposition unit as well as with the unit for TMC synthesis from recycled concentrated isobutylene. The apparatus is also characterized by the following: 1,3-dioxanes synthesis unit includes by-products separation into light, medium and heavy fractions, from which the light fraction of by-products is fed for homogenous decomposition to isoprene synthesis unit and/or to by-products decomposition unit for combined decomposition with the by-products (MDHP fraction) formed during separation of synthesis products and isolation of isoprene monomer; the medium fraction of by-products is assigned for sale and/or mixed with the light fraction of by-products and supplied to by-products decomposition unit; and unreacted isobutylene from the unit of TMC synthesis from recycled concentrated isobutylene is supplied to the unit of TMC synthesis from isobutylene-containing fraction, being previously mixed.

专利号:WO-2009082260-A1
优先权日:2007-12-21
标 题 :Plant for the liquid phase synthesis of isoprene from isobutylene and formaldehyde
发明人：BUSYGIN VLADIMIR MIKHAILOVICH; DYKMAN ARKADIY SAMUILOVICH; GILMANOV KHAMIT KHAMISOVICH; POLYAKOV SERGEY ALEKSANDROVICH; FLEGONTOV ALEKSEY MICHAYLOVICH; FEDORCOVA ELENA VLADIMIROVNA
权利人:OBSHESTVO O OGRANICHENNOI OTVE
摘要:The invention relates to a plant for the synthesis of isoprene in a liquid phase from isobutylene and formaldehyde or from the source substances thereof. The inventive plant consists of a dimethyl dioxane synthesis unit detached from two parallel operating trimethyl carbinol synthesis units, and the trimethyl carbinol and dimethyl dioxane produced therein are simultaneously supplied for common decomposition to an isoprene synthesis unit. Light by-products extracted in a unit for rectifying high-boiling by-products, which unit is located downstream of the dimethyl dioxane synthesis unit, are supplied either to sales or to decomposition together with by-products (methyl-dihydropyrane fraction ) which are produced during end-products separation and isoprene monomer extraction, or to sales and to a decomposition unit for decomposition together with the above-mentioned by-products (methyl-dihydropirane fraction), afterwards to the end-product separation and isoprene monomer extraction unit. The end-product separation and isoprene monomer extraction unit is directly connected to the soprene synthesis unit, the decomposition unit and to the dimethyl dioxane synthesis unit. Said plant makes it possible to reduce the accumulation of high-boiling by-products, to decrese the production costs and to improve the engineering-and-economical performances of the process.

专利号:US-9353057-B2
优先权日:2003-12-30
标 题:Synthesis of acyloxyalkyl carbamate prodrugs and intermediates thereof
发明人：GALLOP MARK A; DAI XUEDONG; SCHEUERMAN RANDALL A; RAILLARD STEPHEN P; MANTHATI SURESH K; YAO FENMEI; PHAN THU; LUDWIKOW MARIA; PENG GE; BHAT SEEMA
权利人:XENOPORT INC
摘要:Methods for synthesis of 1-(acyloxy)-alkyl carbamates, particularly, the synthesis of 1-(acyloxy)-alkyl carbamate prodrugs of primary or secondary amine-containing drugs are described. Also described are methods for synthesis of 1-(acyloxy)-alkyl N-hydroxysuccinimidyl carbonates which are useful intermediates in the synthesis of 1-(acyloxy)-alkyl carbamates are also described.

专利号:US-2023312617-A1
优先权日:2020-07-25
标题 :Process for synthesis of organosilicon compounds from halosilanes
发明人：DOLAI SUKANTA; BHAT SHREEDHAR; TARAFDAR GOURAV
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:A process for synthesis of an organosilicon compound is provided herein. Also, novel organosilicon compounds prepared by the present process is provided herein. The process comprises the reaction of a halosilane with an organofunctional alkyl halide in the presence of a metal catalyst, a promoter, and an optional co-catalyst. The process provides an efficient synthetic route to produce organosilicon compounds. The process also allows synthesis of organosilicon compounds with a plurality of different functional groups.