CAS: 4249-10-9; 1,2,3,4-Tetramethylcyclopenta-1,3-Diene

相似化合物

4045-44-7 134695-74-2 207284-26-2

上下游产品

CAS号54458-61-6 2,3,4,5-四甲基-2-环戊烯酮 | CAS号82061-20-9 2,3,4,5-Tetrame... | CAS号77-78-1 硫酸二甲酯 | CAS号4984-82-1 环戊二烯化钠 | CAS号90644-55-6 Cyclobutene, 1,... | CAS号90002-77-0 3-chloro-1,2,3-... | CAS号54458-60-5 2,3,5,6-四甲基四氢吡喃-4-酮 | CAS号96-22-0 3-戊酮 | CAS号83321-16-8 2,3,4-trimethyl... | CAS号89597-05-7 二(2,3,4,5-四甲基-2... | CAS号134695-74-2 三甲基(2,3,4,5-四甲基 | CAS号125542-03-2 二甲基氯(2,3,4,5-四甲... | CAS号125542-04-3 N-叔丁基-1,1-二甲基-1...

1-Chloro-1,3,4-Trimethyl-2-Methylenecyclobutene置于硫酸体系中,用 四氯化碳,乙醚 作为反应溶剂,化学反应生成 1,2,3,4-四甲基-1,3-环戊二烯
参考文献:Koptyug,V.A. Et Al.,Journal Of Organic Chemistry Ussr (English Translation),1971,Vol. 7,P. 1117-1123
标题:Koptyug,V.A. Et Al.,Journal Of Organic Chemistry Ussr (English Translation),1971,Vol. 7,P. 1117-1123

专利信息

专利号:US-11498985-B2
优先权日:2017-04-18
标题:Continuous synthesis of an ethylene and butadiene copolymer
发明人：THUILLIEZ JULIEN; PACHECO NUNO
权利人:MICHELIN & CIE
摘要:A process for the synthesis of an ethylene/butadiene copolymer is provided. The process is continuous and comprises the following steps:n a. feeding at least one stirred polymerization reactor with a mixture of ethylene, butadiene, hydrocarbon-based solvent and catalytic system allowing the formation of cyclic trans-1,2-cyclohexane units in the polymer chain with a mole ratio of ethylene to the sum of the ethylene and butadiene monomers ranging from 0.5 to 0.99; the concentration of ethylene and butadiene monomers in the polymerization reaction medium being less than 15% by weight; the operating pressure of the reactor is greater than or equal to the saturated vapour pressure of the polymerization reaction medium; and the polymerization temperature is greater than 90° C.; b. recovering the ethylene/butadiene copolymer, this copolymer comprising, statistically distributed, ethylene units, butadiene units and trans-1,2-cyclohexane units, the molar fraction of ethylene units in the copolymer being greater than or equal to 50%.

专利号:US-11136422-B2
优先权日:2017-04-18
标题:Continuous synthesis of an ethylene and butadiene copolymer
发明人：THUILLIEZ JULIEN; PACHECO NUNO
权利人:MICHELIN & CIE
摘要:A process for the synthesis of an ethylene/butadiene copolymer is provided. The process is continuous and comprises: n a. feeding at least one stirred polymerization reactor with a mixture of ethylene, butadiene, hydrocarbon-based solvent and catalytic system allowing the formation of cyclic trans-1,2-cyclohexane units in the polymer chain with a mole ratio of ethylene to the sum of the ethylene and butadiene monomers ranging from 0.5 to 0.99; the concentration of ethylene and butadiene monomers in the polymerization reaction medium being at least 10% by weight relative to the total weight; the operating pressure of the reactor is greater than or equal to the saturated vapour pressure of the polymerization reaction medium; n b. recovering the ethylene/butadiene copolymer, this copolymer comprising, statistically distributed, ethylene units, butadiene units and trans-1,2-cyclohexane units, the molar fraction of ethylene units in the copolymer being greater than or equal to 50%.

专利号:US-4547603-A
优先权日:1982-04-23
标题:Methylcyclopentadiene synthesis
发明人：RAJAN SUNDAR J
权利人:ETHYL CORP
摘要:Synthesis of methylcyclopentadiene with limited amounts of dimethylcyclopentadiene by-product. Cyclopentadiene monomer is complexed with metallic sodium in diglyme (diethylene glycol dimethylether) and reacted with an alkylating agent such as methyl chloride in the presence of a large stoichiometric excess of cyclopentadiene monomer. A high yield of methylcyclopentadiene is obtained with only a small production of undesirable methylcyclopentadiene. The excess cyclopentadiene is easily recycled in a continuous process.

专利号:US-6084117-A
优先权日:1999-11-22
标题:Production of silated haloarenes by selective silylation of polyhaloarenes
发明人：BERRIS BRUCE C; OWENS DAVID W; MATHUR RAJEEV S
权利人:ALBEMARLE CORP
摘要:Lithiated haloarenes, although useful as intermediates in the synthesis of various end products, can be hazardous to prepare since unstable, shock sensitive compounds can be formed during lithiation of haloarenes. To avoid this problem, a reaction of a polyhaloarene with a hydrocarbyl lithium compound is conducted in the presence of another reactant so that the lithiated haloarene, if formed at all, exists as a transitory intermediate in low concentration. In this way, transitory lithiated haloarene which may be, and presumably is, formed in the reaction is converted into a non-hazardous functionally-substituted haloarene essentially as soon as such lithiated haloarene is formed. Thus, an arene having a halogen atom of atomic number greater than 9 substituted on at least two non-adjacent carbon atoms is concurrently reacted with a non-fluoro halotrihydrocarbylsilane and a hydrocarbyl lithium compound, in proportions such that a haloarene having at least one trihydrocarbylsilyl ring substituent is formed.

专利号:US-7112671-B2
优先权日:2000-08-30
标 题 :Non-symmetric tripyrranes in the synthesis of novel macrocycles
发明人：MODY TARAK D; GALANTER JOSHUA
权利人:PHARMACYCLICS INC
摘要:The present invention provides certain non-symmetric tripyrranes; that is, tripyrranes that do not contain a mirror plane of symmetry perpendicular to the plane containing the tripyrrane. Further, the invention includes texaphyrin compounds and sapphyrin compounds, as well as other polypyrrolic macrocycles, prepared using tripyrranes of Formula I as a precursor. These macrocycles are characterized by a tripyrrolic portion of the macrocyclic ring having substituents that cause the heterocycle to lack a plane of symmetry perpendicular to the plane of the macrocycle.

专利号:US-9643152-B2
优先权日:2012-02-17
标 题:Methods for the preparation of reaction vessels
发明人：CRONIN LEROY
权利人:UNIV GLASGOW COURT
摘要:Provided are methods for preparing and using reaction vessels obtained or obtainable by 3D-printing methods, including a method for preparing a product compound, the method comprising the steps of: (i) providing a reaction vessel that is obtained by a 3-D printing method, wherein the reaction vessel has a reaction space; (ii) providing one or more reagents, optionally together with a catalyst or a solvent, for use in the synthesis of the product compound; and (iii) permitting the one or more reagents to react in the reaction space, optionally in the presence of the catalyst and the solvent, in the reaction vessel, thereby to form the product compound.