CAS: 1740-19-8; Dehydroabietic Acid

上下游产品

abietic acid methyl abietate maleopimaric acid dodecaethylene glycolMethyl dehydroabietate 12-sulfodehydroabietic acid 7-oxy-8,11,13-abietatrien-18-oic acid N-((1R,4aS,10aR)-7-Isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-°Ctahydro-phenanthren-1-yl)-benzamide

8-Hydroxygeranyl Acetate置于(R)-3,3'-Dichloro-1,1'-Binaphthalene-2,2'-Diol,Manganese(Iv) Oxide,Potassium Permanganate,Sodium Periodate,正丁基锂,Dilithium Tetrachlorocuprate,氯化锑(V),水,Sodium Carbonate,Magnesium体系中,用 四氢呋喃,二氯甲烷,叔丁醇 用作溶剂,化学反应 38.75H,反应生成脱氢松香酸
参考文献:Useful Catalytic Enantioselective Cationic Double Annulation Reactions Initiated At An Internal π-Bond: Method And Applications
标题:Useful Catalytic Enantioselective Cationic Double Annulation Reactions Initiated At An Internal π-Bond: Method And Applications
摘要:The 1:1 Complex Of O,O'-Dichloro-R-Binol And Sbcl5 Initiates The Enantioselective Cationic Polycyclization Of Polyunsaturated Substrates At A Predictable Pi-Bond Which May Be Either Terminal Or,As Shown Herein,Internal. The Extension Of This Powerful Construction To Internal Pi-Bonds Expands The Scope Of This Method And Opens Up Very Short Pathways To Numerous Chiral Polycyclic Molecules,Including Natural Products And Their Analogues. Especially Simple Synthetic Routes Are Disclosed That Provide Access To Dysideapalaunic Acid,Dehydroabietic Acid,And Epipodocarpic Acid And Illustrate,The Value Of This Enantioselective Approach.
Doi:10.1021/ja4125093

专利信息

专利号:US-4399240-A
优先权日:1981-12-30
标 题:Removal of acrylonitrile from latex with saturated heterocyclic amines
发明人：SENYEK MICHAEL L
权利人:GOODYEAR TIRE & RUBBER
摘要:Acrylonitrile is a monomer that is widely used in the synthesis of a vast variety of polymers. Undesirable quantities of unpolymerized residual acrylonitrile are often present in these acrylonitrile polymers. This residual or free acrylonitrile dissolved in an acrylonitrile polymer and/or its emulsifier system and the water phase used in its polymerization can be reduced significantly in concentration by treatment with saturated 6 to 7 membered ring heterocyclic amines. These amines react with acrylonitrile by a nitrogen-cyanoethylation reaction which results in the formation of a tertiary amino linkage.

专利号:US-4365027-A
优先权日:1981-12-28
标 题 :Removal of acrylonitrile from latex with oximes
发明人：SENYEK MICHAEL L; COSTANZA ALBERT J
权利人:GOODYEAR TIRE & RUBBER
摘要:Acrylonitrile is a monomer that is widely used in the synthesis of a vast variety of polymers. Undesirable quantities of unpolymerized residual acrylonitrile are often present in these acrylonitrile polymers. This residual or free acrylonitrile dissolved in an acrylonitrile polymer and/or its emulsifier system and the water phase used in its polymerization can be reduced significantly in concentration by treatment with oximes. Oximes react with acrylonitrile by an oxygen-cyanoethylation reaction which results in the formation of a cyanoethyl oximino ether linkage.

专利号:US-5756606-A
优先权日:1997-05-22
标题:Means to control particle size and eliminate fouling in the synthesis of syndiotactic 1,2 - polybutadiene
发明人：WONG TANG HONG
权利人:GOODYEAR TIRE & RUBBER
摘要:Syndiotactic 1,2-polybutadiene is a thermoplastic resin which has double bonds attached in an alternating fashion to its polymeric backbone. Films, fibers and molded articles can be made utilizing syndiotactic 1,2-polybutadiene. It can also be blended into rubbers and cocured therewith. It is generally preferred to synthesize syndiotactic 1,2-polybutadiene in an aqueous medium by suspension or emulsion polymerization. In such aqueous polymerization techniques reactor fouling and particle size control problems are frequently encountered. This invention is based upon the unexpected finding that reactor fouling can be greatly reduced or eliminated and that particle size can be regulated by conducting such aqueous polymerizations in the presence of a controlled amount of dissolved oxygen which is within the range of about 0.01 ppm to about 4 ppm. This invention more specifically discloses a process for preparing syndiotactic 1,2-polybutadiene in an aqueous medium with minimal reactor fouling which comprises polymerizing 1,3-butadiene monomer in the aqueous medium in the presence of (1) a catalyst system which is comprised of (a) transition metal compound, (b) an organoaluminum compound and (c) at least one member selected from the group consisting of carbon disulfide, phenyl isothiocyanate and xanthic acid and (2) from about 0.01 ppm to about 4 ppm of oxygen.\\!

专利号:US-6344573-B1
优先权日:2000-09-25
标题:Process for extraction and concentration of liposoluble vitamins and provitamins, growth factors and animal and vegetable hormones from residues and by-products of industrialized animal and vegetable products
发明人：ROHR RODOLFO; TRUJILLO-QUIJANO JOSE ANIBAL
权利人:RESITEC IND QUIMICA LTDA
摘要:A process for the extraction and concentration of unsaponifiable substances, containing liposoluble vitamins and provitamins, growth factors and animal and vegetable hormones, from residues of the industrialization of animal or vegetable products. This process does not require the use of solvents. Its main goal is to obtain the separation of these 'valuable products', by means of distillation/evaporation at high vacuum, and the production of fatty acids and other high quality organic acids, once the recovery of the unsaponifiable fraction of residues from the industrialization of animal or vegetable products, is of great commercial interest. This is due to the fact that the 'valuable products', have in many cases, vitamin activity, such as: tocopherols, sterols, carotenoids, vitamin A, vitamin K, vitamin D, while other products present cholesterol reducing properties, such as: sterols, tocotrienols, esqualene, etc; or even, anti-oxidant properties like: tocopherols, tocotrienols; as well as anti-carcinogenic properties such as: tocotrienols, sterols, lycopene, and alpha-carotene. Some other products are used as a structure for chemical-synthesis, like for example: sterols for hormone synthesis, vitamin D synthesis; and other products which have nutraceutic properties, apart from the commercial interest in some products, the cosmetic formulas of which present emulsifying properties, emulsion stabilizers and/or viscosity modifiers like for example sterols.

专利号:US-7799906-B1
优先权日:2004-09-22
标题 :Compositions and methods for modulating lignin of a plant
发明人：ROTTMANN WILLIAM H; CONNETT MARIE B; BLOKSBERG LEONARD N; FORSTER RICHARD L
权利人:ARBORGEN LLC
摘要:Novel plant monolignol synthesis, monolignol transport, and lignin polymerization genes and polypeptides encoded by such genes are provided. These genes and polynucleotide sequences are useful regulating the lignification process and plant phenotype. Moreover, these genes are useful for expression profiling of plant monolignol synthesis, monolignol transport, and lignin polymerization genes. The invention specifically provides polynucleotide and polypeptide sequences isolated from Eucalyptus and Pinus.

专利号:US-5986026-A
优先权日:1997-05-05
标 题:Syndiotactic 1,2-polybutadiene synthesis
发明人：WONG TANG HONG; CLINE JAMES HEBER
权利人:GOODYEAR TIRE & RUBBER
摘要:Syndiotactic 1,2-polybutadiene is a thermoplastic resin which has double bonds attached in an alternating fashion to its polymeric backbone. Films, fibers and molded articles can be made utilizing syndiotactic 1,2-polybutadiene. It can also be blended into rubbers and cocured therewith. In such applications, sometimes it is beneficial for the syndiotactic 1,2-polybutadiene to have more than one melting point. This invention discloses a process for preparing syndiotactic 1,2-polybutadiene having at least two different melting points which comprises: polymerizing 1,3-butadiene monomer in an aqueous medium in the presence of (1) a catalyst composition which is made by reacting (a) at least one cobalt compound selected from the group consisting of (i) beta -diketone complexes of cobalt, (ii) beta -keto acid ester complexes of cobalt, (iii) cobalt salts of organic carboxylic acids having 6 to 15 carbon atoms and (iv) complexes of halogenated cobalt compounds of the formula CoXn, wherein X represents a halogen atom and n represents 2 or 3, with an organic compound selected from the group consisting of tertiary amine alcohols, tertiary phosphines, ketones and N,N-dialkylamides, (b) at least one organoaluminum compound of the formula AlR3, wherein R represents a hydrocarbon radical of 1 to 6 carbon atoms and (c) at least one conjugated diene; (2) at least one member selected from the group consisting of carbon disulfide, phenyl isothiocyanate and xanthic acid; and (3) at least one melting-point regulator and (4) a sodium halide salt or a potassium halide salt.