📜巴豆酸,乙烯置于三己基(四癸基)氯化膦,四丁基氯化铵,Copper Diacetate,四己基氯化铵,钯,Copper Dichloride体系中,化学反应 54.0H,以8%的收率获得2-丁烯酸乙烯酯 参考文献: Process For The Production Of Higher Carboxylic Acid Vinyl Esters[fr] Procédé Pour La Production D'Esters Vinyliques D'Acide Carboxylique 标题: Process For The Production Of Higher Carboxylic Acid Vinyl Esters[fr] Procédé Pour La Production D'Esters Vinyliques D'Acide Carboxylique 摘要:本发明涉及一种生产具有3至20个碳原子的羧酸乙烯酯的方法,通过在存在钯(pd)催化剂的情况下与铜(cu)协同催化剂结合,通过有机盐稳定,在存在乙烯和空气或氧气的情况下进行乙烯化反应.
专利号:US-7268144-B2 优先权日:2004-04-14 标 题 :Regiospecific synthesis of rapamycin 42-ester derivatives 发明人:GU JIANXIN; CAI PING; RUPPEN MARK E 权利人:WYETH CORP 摘要:A method for the regiospecific synthesis of rapamycin 42-ester derivatives is described. The method involves lipase-catalyzed acetylation of 42-hydroxy of rapamycin with an acyl donor such as a vinyl ester, an isopropenyl ester or an anhydride in a suitable organic solvent.
专利号:US-8771719-B2 优先权日:2002-08-12 标题 :Synthesis of a bone-polymer composite material 发明人:SHIMP LAWRENCE A; WINTERBOTTOM JOHN M; BOYCE TODD M; KNAACK DAVID 权利人:SHIMP LAWRENCE A; WINTERBOTTOM JOHN M; BOYCE TODD M; KNAACK DAVID; WARSAW ORTHOPEDIC INC 摘要:A method of producing a bone-polymer composite. The method comprises the steps of providing a plurality of bone particles, combining the bone particles with a polymer precursor, and polymerizing the polymer precursor.
专利号:US-7728088-B2 优先权日:2002-08-06 标题 :Synthesis of statistical microgels by means of controlled radical polymerisation 发明人:DESTARAC MATHIAS; BAVOUZET BRUNO; TATON DANIEL 权利人:RHODIA OPERATIONS 摘要:The invention relates to a method of preparing statistical microgels. The inventive method comprises a step involving the radical polymerisation of a composition containing: at least one monoethylenically-unsaturated monomer, at least one multiethylenically-unsaturated monomer, a free radical source and a control agent. The invention also relates to first generation microgels thus prepared and all the compounds resulting from said microgels (next-generation microgels).
专利号:US-7037990-B2 优先权日:2003-01-03 标题 :Transition metal complexes in the controlled synthesis of polyolefins substituted with functional groups 发明人:TAGGE CHRISTOPHER D; WILSON JR ROBERT B; ONO HIROYUKI 权利人:NIPPON SYNTHETIC CHEMICAL COMP 摘要:A method is provided for the polymerization of olefins substituted with a functional group using a transition metal catalyst that, by virtue of one or more stabilizing groups incorporated within the catalyst structure, “fixesâ€? the stereoconfiguration of each olefinic monomer relative to the transition metal complex during each successive reaction in the polymerization process. The invention substantially reduces the likelihood of olefin rearrangement at the active site of the catalyst during polymerization. In one particular embodiment, the functional group is a polar, electron-donating group and the stabilizing group is a Lewis acid substituent; examples of polymers that can be prepared with such a system include poly(vinyl acetate), poly(vinyl alcohol), and poly(vinyl ethers). Novel complexes and catalyst systems useful in the polymerization method are also provided.
专利号:US-6180133-B1 优先权日:1997-11-25 标 题 :Antioxidant composition for topical/transdermal prevention and treatment of wrinkles 发明人:QUAN DANYI; VENKATESHWARAN SRINIVASAN; EBERT CHARLES D 权利人:WATSON PHARMACEUTICALS INC 摘要:An anti-wrinkle skin treating composition comprises a pressure sensitive matrix patch having dissolved in the adhesive a mixture of antioxidants in the form of a Vitamins C ester and Vitamin E. Also preferably dissolved in the adhesive are glycerine and a polydiorganosiloxane adhesion-adjusting agent. Optionally dissolved in the adhesive is also one or more members selected from the group consisting of moisturizing agents, skin collagen synthesis promoting agents and exfoliating agents. When applied to a wrinkled skin area the composition acts to diminish fine wrinkles and improves the overall thickness, elasticity, firmness and smoothness of the skin. The modified adhesive properties of the patch are sufficient to maintain the patch in place on the skin for the recommended treatment period while allowing the patch to be readily removed without causing skin irritation or leaving adhesive residue on the skin.
专利号:US-2006106178-A1 优先权日:2002-08-06 标题:Synthesis of statistical microgels by means of controlled radical polymerisation