CAS: 1476-11-5; (Z)-1,4-Dichlorobut-2-Ene

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110-57-6 1775-39-9 54880-27-2

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顺式-1,2-二羟甲基乙烯置于t406石油添加剂,氯化亚砜体系中,用 二氯甲烷 用作溶剂,以94%的收率获得顺式-1,4-二氯-2-丁烯
参考文献:Thionyl Chloride-Benzotriazole In Methylene Chloride: A Convenient Solution For Conversion Of Alcohols And Carboxylic Acids Expeditiously Into Alkyl Chlorides And Acid Chlorides By Simple Titration
标题:Thionyl Chloride-Benzotriazole In Methylene Chloride: A Convenient Solution For Conversion Of Alcohols And Carboxylic Acids Expeditiously Into Alkyl Chlorides And Acid Chlorides By Simple Titration
摘要:在干燥的二氯甲烷中,以1:1等量混合的亚硫酰氯和苯并三唑溶液,在室温下能高效地将醇和羧酸分别转化为相应的烷基氯化物和酰氯,且通过简单的滴定法即可获得极佳的收率.
Doi:10.1055/s-1999-2943

专利信息

专利号:US-6613910-B2
优先权日:2001-04-02
标题 :One-pot synthesis of group 8 transition metal carbene complexes useful as olefin metathesis catalysts
发明人：GRUBBS ROBERT H; MORGAN JOHN P; BENITEZ DIEGO; LOUIE JANIS
权利人:CALIFORNIA INST OF TECHN
摘要:The invention provides a novel method for synthesizing transition metal carbene complexes useful as olefin metathesis catalysts. The method is a convenient one-pot synthesis in which transition metal carbenes are prepared in high yield from readily available starting materials via a dihydrogen complex containing two different anionic ligands, preferably a phosphine and a heteroatom-stabilized carbene. The invention additionally provides a method for synthesizing precursors to carbene ligands useful, inter alia, in the aforementioned one-pot synthesis. The precursors are in the form of trichloromethyl adducts of the formula L 1 -CCl 3 , where L 1 is a heteroatom-stabilized carbene ligand, and are prepared by contacting an unsaturated, ionized analog of L-CCl 3 with a non-nucleophilic base in the presence of chloroform.

专利号:US-4713479-A
优先权日:1986-11-28
标题 :Synthesis of high-purity dialkyl 2-vinylcyclopropane-1,1-dicarboxylate
发明人：CLARK JR CLARENCE E; FAYTER JR RICHARD G
权利人:NAT DISTILLERS CHEM CORP
摘要:This invention relates to a two-step synthesis of high purity dialkyl 2-vinyl-cyclopropane-1,1-dicarboxylate in which a mixture of trans- and cis-1,4-dihalobutene-2 is first isomerized to essentially trans-1,4-dihalobutene-2 followed immediately by cyclocondensing the resultant trans-1,4-dihalobutene-2 with a malonic ester in the presence of an alcoholic solution of a metallic alkoxide.

专利号:US-4365094-A
优先权日:1979-12-28
标 题 :Process for the synthesis of tertiary phosphine oxides, and new tertiary phosphine oxides
发明人：BOILEAU SYLVIE L; N GUYEN THANH-DUNG; GAUTIER JEAN-CLAUDE C
权利人:POUDRES & EXPLOSIFS STE NALE
摘要:The invention relates to the synthesis of tertiary phosphine oxides and also to certain tertiary phosphine oxides. According to the invention, an organic phase containing a halogenomethyl derivative, a secondary phosphine oxide and a phase transfer catalyst in an organic medium is reacted with an aqueous phase containing an inorganic base. The halogenomethyl derivative can be a micromolecule or a macromolecule. The tertiary phosphine oxides are substances which are useful, in particular, in fireproofing, in hydrometallurgy and in the field of plant health.

专利号:US-4111933-A
优先权日:1976-04-30
标题:Protection of functional groups during reaction and their subsequent restoration
发明人：ECKERT HEINER; UGI IVAR; KABBE HANS-JOACHIM
权利人:BAYER AG
摘要:In the process for preparing an organic compound of the formula n n A' -- X n n in which n X is an amino group, a hydroxyl group or a carboxyl group, and n A' is the remainder of the molecule, from an organic compound of the formula n n A -- X n n in which n A is the remainder of the molecule which can undergo reaction to form A', by converting A -- X into a compound of the formula n n A -- Z -- COOR n n in which n Z is --NH--, --O-- or a direct C--C bond, and n R is a radical of the formula ##STR1## IN WHICH Y is a direct C--C single bond, the --CHâ•?CH-- group or an arylene group, n R 1 to R 4 each independently is hydrogen, halogen or an alkyl, aryl, aralkyl, alkoxycarbonyl, alkylaminocarbonyl, arylaminocarbonyl or cycloalkylaminocarbonyl radical, or n R 1 + r 2 and R 3 + R 4 each independently completes a 5- or 6-membered carbocyclic ring, or n R 1 and R 3 conjointly with the grouping --C--Y--C-- forms a carbocyclic ring with 5 or 6 carbon atoms, and Hal is halogen, n Thereby to protect X, then converting A -- Z -- COOR into a compound of the formula n n A' -- Z -- COOR n n and then treating the compound A' -- Z -- COOR to restore the group X, the improvement which comprises effecting the treatment of the compound A' -- Z -- COOR with an alkali metal compound of a complex of monovalent cobalt. The process is applicable particularly to aminocarboxylic acids including intermediates from various stages of the synthesis of penicillins and cephalosporis.

专利号:WO-8102735-A1
优先权日:1980-03-24
标题 :A process for the preparation of difunctional aldehydes
发明人：HOPFINGER A; SJOEBERG K
权利人:HOPFINGER A; SJOEBERG K
摘要:Alkylation of (Alpha),(Alpha) dialkylaldehydes with organic dihalides in two or three phase systems in the presence of alkali and a phase transfer catalyst. Depending on the reaction conditions and the structure of the dihalides, difunctional aldehydes with formula I or II or their mixture are obtained. (FORMULA) Where Z is an alkylyl, alkenylyl, aryldialkyl or cykloalkylyl structure and R1 and R2 are alkyl groups with 1-6 carbon atoms, and X is an halide atom. These compounds are suitable starting materials for the synthesis of monomers. The aldehyde group can be converted to an alcohol, acid, amine or isocyanate function. The halogen atom can be converted to an hydroxy-or aminogroup.

专利号:US-2025136535-A1
优先权日:2021-12-13
标 题:Heterogeneous bimetallic catalyst, method for preparing same and use thereof in the synthesis of ethylene glycol from carbon monoxide
发明人：ABDELLAH IBRAHIM; BIDAL YANNICK; NASR ALLAH TAWFIQ
权利人:FAIRBRICS
摘要:A supported bimetallic catalyst according to the formula Pd-M/Support, which includes palladium and a metal M on a support, wherein M represents Cu or Ag, for use in a method for preparing ethylene glycol from an alcohol. The method includes two reaction steps catalyzed by the bimetallic catalyst of formula Pd-M/Support.