CAS: 14187-32-7; Dibenzo-18-Crown-6

相似化合物

40100-11-6 75616-63-6 126531-26-8

上下游产品

CAS号120-80-9 邻苯二酚 | CAS号111-44-4 二氯乙基醚 | CAS号23116-94-1 1,5-双(2-羟基苯氧基)-... | CAS号41855-35-0 4'-乙酰苯并-18-冠-6-醚 | CAS号23116-94-1 1,5-双(2-羟基苯氧基)-... | CAS号79875-18-6 2-(2-(2-(2-(2-h... | CAS号126531-26-8 4′-氨基二苯并-18-冠醚-6 | CAS号16069-36-6 二环己烷并-18-冠醚-6 | CAS号118060-27-8 4-硝基苯并-18-冠-6醚 | CAS号68725-69-9 2,13-divaleryld... | CAS号75464-37-8 2,3:11,12-bis[4... | CAS号61853-51-8 4,4,5,5-tetrani...

水杨醛置于potassium Carbonate,间氯过氧苯甲酸体系中,用 二氯甲烷,乙腈 用作溶剂,化学反应 86.0H,反应生成二苯并-18-冠醚-6
参考文献:Application Of Bayer-Villiger Reaction To The Synthesis Of Dibenzo-18-Crown-6,Dibenzo-21-Crown-7 And Dihydroxydibenzo-18-Crown-6
标题:Application Of Bayer-Villiger Reaction To The Synthesis Of Dibenzo-18-Crown-6,Dibenzo-21-Crown-7 And Dihydroxydibenzo-18-Crown-6
摘要:双苯并-18-冠-6,双苯并-21-冠-7和二羟基双苯并-18-冠-6是通过拜耳-维利杰氧化策略合成的.双苯并-18-冠-6和双苯并-21-冠-7可以通过一个三步法从水杨醛起始合成.水杨醛与双(2-氯乙基)醚在乙腈中用氢氧化钾反应,以通过氧乙烯桥连接两个酚羟基,随后通过拜耳-维利杰反应将醛基转化为羟基,最终用适当的氧乙烯桥连接两个酚羟基.这两种目标冠醚的总体产率分别为24%和30%.该方法具有合成对称及不对称双苯并冠醚的巨大潜力,且氧乙烯桥可变.拜耳-维利杰氧化可通过对双苯并-18-冠-6的乙酰化,然后再进行拜耳-维利杰氧化,来制备双羟基衍生物.使用三氟乙酸可以显著加速拜耳-维利杰氧化反应.
Doi:10.5012/jkcs.2014.58.2.193

专利信息

专利号:US-7652164-B2
优先权日:2005-09-13
标题:Process for the direct synthesis of trialkoxysilane
发明人：LEWIS KENRICK M; MEREIGH ABELLARD T; O'YOUNG CHI-LIN; CAMERON RUDOLPH A
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:The Direct Synthesis of trialkoxysilane is carried out by conducting the Direct Synthesis reaction of silicon and alcohol, optionally in solvent, in the presence of a catalytically effective amount of Direct Synthesis catalyst and an effective catalyst-promoting amount of Direct Synthesis catalyst promoter, said promoter being an organic or inorganic compound possessing at least one phosphorus-oxygen bond.

专利号:EP-0439404-B1
优先权日:1990-01-25
标题 :Preparation of 2-(2'-thienyl) alkylamines and derivatives thereof and synthesis of 4,5,6,7- thieno [3,2-c] pyridine derivatives therefrom
发明人：KHATRI HIRALAL N; DEHOFF BRADLEY S
权利人:SANOFI SA
摘要:An improved process for the synthesis of 2-(2 min -thienyl)ethylamine from suitably functionalized derivatives of 2-(2 min -thienyl)ethanol employing ammonia gas in the presence of a metal salt or liquid ammonia and alkyl ketone as a solvent. The 2-(2 min -thienyl)ethylamine produced by this process is advantageously converted to the carbamic acid salt, which is suitably reconverted to 2-(2 min -thienyl)ethylamine, a useful intermediate in the synthesis of ticlopidine.

专利号:US-RE39650-E
优先权日:1996-10-10
标 题:Surface-active additives in the direct synthesis of trialkoxysilanes
发明人：MENDICINO FRANK D; LEWIS KENRICK M; MAGRI SEBASTIANO; YU HUA; CHILDRESS THOMAS E
权利人:GEN ELECTRIC
摘要:Disclosed is a process in which surface-active additives are used in the slurry phase Direct Synthesis of trialkoxysilanes to shorten the period between the start of the reaction and the attainment of steady-state rates and selectivities, to improve product yields and to control or prevent foam formation. Compositions comprising silicone antifoam compounds and fluorosilicone polymers are the preferred surface-active additives of the instant process.

专利号:US-7495120-B2
优先权日:2001-01-31
标题 :Nanosized copper catalyst precursors for the direct synthesis of trialkoxysilanes
发明人：LEWIS KENRICK M; ENG REGINA NELSON; CROMER SABRINA R; MEREIGH ABELLARD T; O'YOUNG CHI-LIN
权利人:MOMENTIVE PERFORMANCE MAT INC
摘要:The present invention provides a process for using nanosized copper, nanosized copper oxides, nanosized copper chlorides, other nanosized copper salts, and mixtures thereof, as sources of catalytic copper in the Direct Synthesis of trialkoxysilanes of the formula HSi(OR) 3 wherein R is an alkyl group containing from 1 to 6 carbon atoms inclusive. The nanosized copper, nanosized copper oxides, nanosized copper chlorides, other nanosized copper salts, and their mixtures of this invention have average particle sizes that are in the range from about 0.1 to about 600 nanometers, preferably from about 0.1 to about 500 nanometers, and most preferably from about 0.1 to about 100 nanometers. Nanosized sources of catalytic copper afford high dispersion of catalytic sites on silicon and contribute to high reaction rates, high selectivity and high silicon conversion. The nanosized copper catalyst precursors of the invention permit the use of substantially reduced levels of copper compared to conventional practice.

专利号:US-5728858-A
优先权日:1996-10-10
标题:Activation of copper-silicon slurries for the direct synthesis of trialkoxysilanes
发明人：LEWIS KENRICK M; YU HUA
权利人:OSI SPECIALTIES INC
摘要:Disclosed is an improved process for the slurry phase Direct Synthesis of trialkoxysilanes which comprises the activation of copper catalyst and silicon with a reducing agent such as hydrogen gas, carbon monoxide or monosilane. Such activation affords high, stable reaction rates and selectivities and high silicon overall conversion especially in alkylated benzene solvents.

专利号:US-10040752-B2
优先权日:2015-08-24
标 题 :Synthesis of levomethadone hydrochloride or dextromethadone hydrochloride and methods for use thereof
发明人：MKRTCHYAN GNEL; YAO QINGWEI
权利人:CODY LABORATORIES INC
摘要:Highly efficient methods for synthesis of levomethadone hydrochloride or dextromethadone hydrochloride are provided starting from D-alanine, or L-alanine, respectively, with retention of configuration. Methods for treating a subject are provided comprising administering a composition comprising an effective amount of levomethadone hydrochloride having not more than 10 ppm dextromethadone.