CAS: 1540-34-7; 3-Ethyl-2,4-Pentanedione

上下游产品

ethyl iodide acetylacetone 1,1-diacetylcyclopropane 3,3-diacetylpropyl mercury chloride pentane-2,3-dione-3-phenylhydrazone ethyl 3,5-dimethyl-4-ethylpyrrole-2-carboxylate Pentane-2,3-dione 3-(p-tolylhydrazone) 4-ethyl-3,5-dimethyl-1-phenyl-1H-pyrazole

📜1,1-乙酰基环丙烷 反应生成3-乙基-2,4-戊二酮
参考文献:Groeger C.; Musso H.; Rossnagel I.,Chem. Ber.,1980,113,No 11,3621-3628
标题:Groeger C.; Musso H.; Rossnagel I.,Chem. Ber.,1980,113,No 11,3621-3628

专利信息

专利号:US-7576234-B2
优先权日:2002-05-15
标题 :Synthesis of 2-alkyl amino acids
发明人：CHORGHADE MUKUND S; GURJAR MUKUND K; MOHAPATRA DEBENDRA K
权利人:GENZYME CORP
摘要:Non-natural amino acids such as 2-alkylated amino acids allow for the synthesis of a wider variety of peptidal and non-peptidal pharmaceutically active agents. A method of preparing a 2-alkyl amino acid involves a Michael-type addition of a nucleophile to a dialkyl 2-methylidenylpropan-1,3-dioate and the conversion of a ester moiety into an amino moiety. The present invention also discloses a method of preparing a class of iron chelating agents related to desferrithiocin, all of which contain a thiazoline ring. In this method, an aryl nitrile or imidate is condensed with cysteine, a 2-alkyl cysteine, or a cysteine ester.

专利号:US-5502126-A
优先权日:1993-06-17
标 题 :Process for the synthesis of isoprene butadiene rubber
发明人：BELL ANTHONY J; MATRANA BARRY A; HALASA ADEL F
权利人:GOODYEAR TIRE & RUBBER
摘要:The subject invention relates to a technique for synthesizing rubbery non-tapered, random, copolymers of 1,3-butadiene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire sidewall rubber compounds for truck tires. By utilizing these isoprene-butadiene rubbers in tire sidewalls, tires having improved cut growth resistance can be built without sacrificing rolling resistance. Such rubbers can also be employed in tire tread compounds to improve tread wear characteristics and decrease rolling resistance without sacrificing traction characteristics. This invention more specifically discloses a process for the synthesis of isoprene-butadiene rubbers which comprises copolymerizing isoprene monomer and 1,3-butadiene monomer in an organic solvent in the presence of a catalyst system which is made by the sequential steps of (1) mixing (a) an organoaluminum hydride, (b) a member selected from the group consisting of aliphatic alcohols, cycloaliphatic alcohols, aliphatic thiols, cycloaliphatic thiols, trialkyl silanols, and triaryl silanols, and (c) optionally, 1,3-butadiene in an organic solvent to produce a modified organoaluminum catalyst component; (2) adding an organometallic compound which contains a metal from Group III-B of the Periodic System to the modified organoaluminum catalyst component to produce a Group III-B metal containing catalyst component; and (3) adding a compound which contains at least one labile halogen atom to the Group III-B metal containing catalyst component.

专利号:US-2003125487-A1
优先权日:2001-12-31
标题 :Group III-B metal catalyst system
发明人：HSU WEN-LIANG; HALASA ADEL FARHAN; JASIUNAS CHAD AARON
权利人:HSU WEN-LIANG; HALASA ADEL FARHAN; JASIUNAS CHAD AARON
摘要:The subject invention relates to a technique for synthesizing rubbery non-tapered, random, copolymers of 1,3-butadiene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire sidewall rubber compounds for truck tires. By utilizing these isoprene-butadiene rubbers in tire sidewalls, tires having improved cut growth resistance can be built without sacrificing rolling resistance. Such rubbers can also be employed in tire tread compounds to improve tread wear characteristics and decrease rolling resistance without sacrificing traction characteristics. This invention more specifically discloses a process for the synthesis of isoprene-butadiene rubbers which comprises copolymerizing isoprene monomer and 1,3-butadiene monomer in an organic solvent in the presence of a catalyst system that is comprised of (I) a compound which contains at least one labile halogen atom and (II) a Group III-B metal containing catalyst component which is made by the sequential steps of (1) mixing (a) an organoaluminum hydride, (b) a member selected from the group consisting of aliphatic alcohols, cycloaliphatic alcohols, aliphatic thiols, cycloaliphatic thiols, trialkyl silanols, and triaryl silanols, and (c) optionally, 1,3-butadiene in an organic solvent to produce a modified organoaluminum catalyst component, and (2) adding an organometallic compound which contains a metal from Group III-B of the Periodic System to the modified organoaluminum catalyst component to produce a Group III-B metal containing catalyst component.

专利号:US-9226876-B2
优先权日:2001-10-19
标 题:Rubber for baby bottle nipples, pacifiers, and syringe plungers
发明人：KERNS MICHAEL LESTER; RACHITA MICHAEL JOSEPH
权利人:KERNS MICHAEL LESTER; RACHITA MICHAEL JOSEPH; GOODYEAR TIRE & RUBBER
摘要:The production of a protein free synthetic polyisoprene which has both low levels of chemical impurities and good physical properties has yet to be realized. It has now been envisioned that the use of neodymium catalyzed polyisoprene will offer the combined advantages of both a clean, as well as, high cis-1,4 polymer. Synthesis of polyisoprene rubber using a neodymium based catalyst system is described. Characterization of the material shows the absence of an ultra high molecular weight fraction and the presence of very high cis-1,4-microstructure. Gum stock and black filled compound studies comparing neodymium polyisoprene with natural rubber, titanium polyisoprene, and lithium polyisoprene have been performed. Results indicate that polyisoprene rubber synthesized using a neodymium catalyst system (Nd—PI) has similar stress-strain and tear properties as synthetic titanium polyisoprene. Analysis of residual volatile, extractable, and oligomer levels indicates Nd—PI is indeed a clean source of high cis synthetic polyisoprene. In the practice of this invention such Nd—PI is used in manufacturing articles used in manufacturing health care products, garments, clothing, and food and beverage packaging. Some specific applications include: bandages, drug delivery patches, suture tape, pharmaceutical closures, including syringe plungers and sleeves, vial closures and stoppers, tourniquets, exercise bands, condoms and prophylactic devices, gloves and glove dip, intervenous bags and tubing, baby bottle nipples, pacifiers, and teething devices, breast hoods, and dental and orthodontic devices.

专利号:US-2006167267-A1
优先权日:2002-05-15
标题:Synthesis of 2-alkyl amino acids

专利号:US-2004024224-A1
优先权日:2002-05-15
标题:Synthesis of 2-alkyl amino acids