CAS: 51980-54-2; 4-(1-Pyrrolidino)Benzaldehyde

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CAS号123-75-1 四氢吡咯 | CAS号1122-91-4 对溴苯甲醛 | CAS号459-57-4 对氟苯甲醛 | CAS号4096-21-3 1-苯基吡咯烷 | CAS号68-12-2 N,N-二甲基甲酰胺 | CAS号93-61-8 N-甲基甲酰苯胺 | CAS号123-11-5 4-甲氧基苯甲醛; 对甲氧基苯... | CAS号13114-23-3 N-(4-甲氧基亚苄基)甲胺 | CAS号79865-85-3 (4-methoxypheny... | CAS号114365-04-7 [4-(吡咯烷基-1-基)苯基]甲胺

苯胺置于potassium Carbonate,三氯氧磷体系中,用 N-甲基吡咯烷酮,N,N-二甲基甲酰胺 作为反应溶剂,化学反应 56.0H,反应生成 4-(1-吡咯啉基)苯甲醛
参考文献:不对称取代和π共轭的2,2'-联吡啶衍生物:合成,光谱,计算和晶体学
标题:不对称取代和π共轭的2,2'-联吡啶衍生物:合成,光谱,计算和晶体学
摘要:一系列新的单取代的苯乙烯基和双苯乙烯基-2,2'-联吡啶发光体(化合物16-23)是通过霍纳-沃兹沃思-埃蒙斯反应合成的,涉及单膦酸酯和给体芳族醛.在标题发色团中,氨基供体在无环和环状之间变化,而烷氧基供体的数目和位置不同.这些生色团的吸收最大值主要是由于不同供体和受体部分之间的分子内电荷转移(ict)引起的.标题供体-受体分子在室温下的溶液中表现出强烈的荧光,并且发现其发射行为对溶剂极性高度敏感.所有的发色团的荧光光谱和量子产率被记录在四个不同的溶剂介质,以及发色团16,17,19,和21也表现出固态荧光.供体官能团的性质和位置的在标题的发色团(电子吸收特性的联吡啶基部分的共轭主链的影响16-23)已被证实,其还进一步由dft和td-Dft计算证实这两种在气相和溶液相中.化合物的晶体结构18已被描述为家庭(代表构件16-23).
DOI:10.1021/acs.Joc.5B02345

专利信息

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:WO-0053313-A2
优先权日:1999-03-09
标 题:Lanthanide catalysts for synthesis of compounds and combinatorial libraries

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.

专利号:US-5011896-A
优先权日:1990-09-10
标 题:Syndiotactic 1,2-polybutadiene synthesis in an aqueous medium
发明人：BELL ANTHONY J; OFSTEAD EILERT A
权利人:GOODYEAR TIRE & RUBBER
摘要:Pure 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. Syndiotactic 1,2-polybutadiene can be made by solution, emulsion or suspension polymerization. It typically has a melting point which is within the range of about 195° C. to about 215° C. However, it is often desirable for the syndiotactic 1,2-polybutadiene to have a melting point of less than about 195° C. This invention discloses a process for preparing syndiotactic 1,2-polybutadiene having a melting point of less than about 195° C. 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 (b) at least one organoaluminum compound, and (c) at least one conjugated diene; (2) carbon disulfide; and (3) at least one modifier selected from the group consisting of (a) 4-(alkylamino)benzaldehydes, (b) 4-(dialkylamino)benzaldehydes, (c) 2,4-di-(alkoxy)benzaldehydes, (d) 2,6-di-(alkoxy)benzaldehydes, (e) 2,4,6-tri-(alkoxy)benzaldehydes, and (f) 4-(1-azacycloalkyl)benzaldehydes.

专利号:JP-H04234402-A
优先权日:1990-09-10
标 题 :Synthesis of syndiotactic 1,2-polybutadiene in aqueous medium

专利号:EP-0879834-A1
优先权日:1997-05-22
标题:Means to control practicle size and eliminate fouling in the synthesis of syndiotactic 1,2-polybutadiene