CAS: 137-18-8; 2,5-Dimethylcyclohexa-2,5-Diene-1,4-Dione

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CAS号95-87-4 2,5-二甲基苯酚 | CAS号615-90-7 2,5-Dimethylhyd... | CAS号106-42-3 对二甲苯 | CAS号869163-37-1 2,5-dimethylcyc... | CAS号78018-52-7 1,4-Bis(trimeth... | CAS号78018-55-0 1,4-Bis(tert-bu... | CAS号2674-32-0 Benzene,1,4-dim... | CAS号3096-71-7 4-氨基-2,5-二甲苯酚 | CAS号67-68-5 二甲基亚砜 | CAS号106-51-4 苯醌 | CAS号496-78-6 2,4,5-三甲基苯酚 | CAS号19206-86-1 2,2,5,7,7,10-he... | CAS号2913-41-9 3-hydroxy-2,5-d... | CAS号615-90-7 2,5-Dimethylhyd... | CAS号28293-24-5 2,5-Cyclohexadi... | CAS号28293-25-6 2,5-Cyclohexadi... | CAS号2593-53-5 2,5-Cyclohexadi... | CAS号2674-32-0 Benzene,1,4-dim... | CAS号26278-83-1 聚谷氨酰胺聚集抑制剂,PGL-135

4-Methyl-2-Cyclohexenone置于silica Gel,Pyridinium Chlorochromate体系中,用 四氢呋喃,乙醚,二氯甲烷,甲苯 用作溶剂,化学反应 5.0H,反应生成2,5-二甲基-对苯醌
参考文献:Preparation Of 1,4-Hydrobenzoquinones By The Pcc/sio2-Promoted Double Oxidation Of 3-Cyclohexene-1,2-Diols
标题:Preparation Of 1,4-Hydrobenzoquinones By The Pcc/sio2-Promoted Double Oxidation Of 3-Cyclohexene-1,2-Diols
摘要:Pcc/sio2催化的3-环己烯-1,2-二醇的双重氧化反应,经过两步反应序列轻松制备而成:首先是对各种共轭环己烯酮的α'-羟基化,随后是烷基阴离子的亲核碳基添加反应,最终生成了多种取代的1,4-氢苯醌.
Doi:10.1039/b511067J

专利信息

专利号:US-10266503-B1
优先权日:2016-05-24
标 题 :Sulfoxide ligand metal catalyzed oxidation of olefins
发明人：WHITE M CHRISTINA; AMMANN STEPHEN E; LIU WEI; MA RULIN
权利人:UNIV ILLINOIS
摘要:The enantioselective synthesis of isochroman motifs has been accomplished via Pd(II)-catalyzed allylic C—H oxidation from terminal olefin precursors. Critical to the success of this goal was the development and utilization of a novel chiral aryl sulfoxide-oxazoline (ArSOX) ligand. The allylic C—H oxidation reaction proceeds with the broadest scope and highest levels asymmetric induction reported to date (avg. 92% ee, 13 examples ≥90% ee). Additionally, C(sp 3 )-N fragment coupling reaction between abundant terminal olefins and N-triflyl protected aliphatic and aromatic amines via Pd(II)/sulfoxide (SOX) catalyzed intermolecular allylic C—H amination is disclosed. A range of 52 allylic amines are furnished in good yields (avg. 76%) and excellent regio- and stereoselectivity (avg. >20:1 linear:branched, >20:1 E:Z). For the first time, a variety of singly activated aromatic and aliphatic nitrogen nucleophiles, including ones with stereochemical elements, can be used in fragment coupling stiochiometries for intermolecular C—H amination reactions.

专利号:US-4895954-A
优先权日:1986-07-26
标题 :Precursors for synthesis of triphendioxazine dyestuffs
发明人：SCHWAIGER GUENTHER; SPRINGER HARTMUT; HELMLING WALTER
权利人:HOECHST AG
摘要:Water-soluble triphendioxazine compounds which have fiber-reactive properties as dyestuffs, which afford deep and fast dyeings on fiber materials, such as wool and, in particular, cellulose, and which correspond to the formula (1) ##STR1## in which: n is the number 0 or 1; n Y is the vinyl group or an ethyl group containing, in β-position, a substituent which can be eliminated by means of an alkali; n Q 1 and Q 2 both represent a benzotriazole radical which can also be additionally substituted in the benzene nucleus by alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, halogen, carboxy or sulfo; n B is --O--, --S--, --NH-- or --N(R')-- wherein R' is optionally substituted alkyl having 1 to 6 carbon atoms; n W 1 and W 2 both represent a divalent, optionally substituted aliphatic, cycloaliphatic, aliphatic-cycloaliphatic, araliphatic or aromatic-carbocyclic radical, it being possible for the aliphatic radicals to be interrupted by hetero groups --O--, --S--, --SO 2 --, --CO--, 1,4-piperidino, --NH-- and/or --N(R o )-- in which R o is optionally substituted alkyl having 1 to 6 carbon atoms or alkanoyl having 2 to 5 carbon atoms, and/or for aliphatic and aryl radicals to be attached to one another through such a hetero group; n R is hydrogen, alkyl having 1 to 6 carbon atoms, alkoxy having 1 to 6 carbon atoms, halogen, carboxyl or sulfo; n E is hydrogen, sulfo, carboxyl, a group --SO 2 --Y as defined above or an optionally substituted sulfonamide group; and n X 1 and X 2 are both hydrogen or halogen, cycloalkyl, alkoxy, aryloxy, aryl or another substituent; n and at least one carboxy, sulfo or sulfato group is present in the molecule (1), n and pre-products of those triphendioxazine compounds, of the general formula ##STR2## in which K is an amino or nitro group, Y' is β-hydroxyethyl or defined as for Y, W has one of the meanings of W 1 , and E' is hydrogen, sulfo, carboxy or a group of the formula --SO 2 --Y' defined above, or an optionally substituted sulfonamide group, and R, B and R* have the above meanings.

专利号:US-2025154548-A1
优先权日:2023-11-09
标 题:Control of enzymatic nucleic acid synthesis via electrochemical means
发明人：BRYAN CASSIE M; SPRACHMAN MELISSA; DOYLE ROBERT; RECORDS WILLIAM C
权利人:CHARLES STARK DRAPER LABORATORY INC
摘要:Provided herein are methods of nucleic acid synthesis. In some embodiments, a method of nucleic acid synthesis comprises selectively activating and deactivating an engineered terminal deoxynucleotidyl transferase (TdT). In some embodiments, a method of nucleic acid synthesis comprises activating a pH sensitive enzyme to digest and remove a TdT.

专利号:US-2024280535-A1
优先权日:2021-06-14
标题:Local sensing and control of ph for parallelized synthesis
发明人：HAM DONHEE; JUNG WOO-BIN; JUNG HAN SAE; WANG JUN; HWANG YOUNG-HA; HINTON HENRY JULIAN; ABBOTT JEFFREY T; PARK HONGKUN
权利人:HARVARD COLLEGE
摘要:Devices and methods for controlling the local pH of solutions (e.g., for parallelized polymer synthesis) are generally described. These may offer several advantages, including the ability to control pH using a plurality of pixels, and/or the ability to sense the pH associated with each pixel, according to certain embodiments. In some embodiments, such devices are used to selectively synthesize polymer sequences (e.g., DNA sequences) associated with each pixel. The pixels can, in some embodiments, comprise electrodes that can apply an electrical potential or current to a solution comprising an electrically sensitive pH modifier. In some cases, reaction of the electrically sensitive pH modifier may cause a change in pH. The pixels may comprise circuit components that can operate in multiple modes (e.g. as potentiostats, galvanostats, or open-circuit potential sensors capable of sensing local pH).

专利号:WO-2021135443-A1
优先权日:2019-12-30
标题:2,3,5-trimethylhydroquinone synthesis method and device
发明人：LV GUOFENG; LIU XIANGHONG; WANG YONG; TIAN JINJIN; Mao Chendong; LIU LILI; PENG FEI
权利人:SHANGYU NHU BIOLOGICAL CHEMICAL CO LTD; ZHEJIANG NHU PHARMACEUTICAL CO LTD; SHANDONG NHU VITAMIN CO LTD
摘要:Provided are a 2,3,5-trimethylhydroquinone synthesis method and device; 2,3,5-trimethylbenzoquinone (TMBQ) is mixed with an alcohol–aromatic hydrocarbon or alcohol–alkane mixed solvent system, then the reaction liquid is thoroughly mixed with hydrogen by way of a hydrogen absorber, then enters a fixed bed equipped with a precious-metal catalyst to carry out a hydrogenation reaction to obtain 2,3,5-trimethylhydroquinone (TMHQ). The technical solution improves the selectivity of the reaction, effectively suppresses side reactions, reducing the impurity content of the product, improving the purity of 2,3,5-trimethylhydroquinone (TMHQ), simplifying the production process, and reducing emission of wastewater, waste gas, and solid waste, and has good environmental protection benefits.

专利号:WO-2023050002-A1
优先权日:2021-09-28
标题:PROCESS FOR SYNTHESIS OF ACIDIC SALTS OF AMINES FROM α-AMINO ACIDS AND FORMULATION COMPRISING SUCH AMINE ACIDIC SALTS