CAS: 522-27-0; α-Furil Dioxime

📜糠偶酰置于吡啶,盐酸羟胺体系中,用 乙醇 作为反应溶剂,化学反应 48.0H,反应生成 α-糠偶酰二肟
参考文献:(二乙酰氧基碘)苯氧化邻二肟:绿色温和地获得呋喃
标题:(二乙酰氧基碘)苯氧化邻二肟:绿色温和地获得呋喃
摘要:Furoxan因其高密度,高标准反应生成焓和高含氮量等优异性能而被广泛应用于高能密度材料领域.然而,其现有的合成方法仍受到底物制备困难和危险试剂人工操作等问题的限制.在这里,我们公开了一种温和的氧化策略,以从容易获得的邻二肟底物开始有效地获得呋喃衍生物.该反应具有高官能团耐受性和易于放大的特点,对特定的非对称o具有优异的区域选择性-二肟.该方法大大降低了安全风险,简化了操作流程,意味着可以轻松获取多样化的呋喃衍生物,为呋喃衍生物的广泛应用铺平了道路.
DOI:10.1039/d1Nj05510K

专利信息

专利号:US-5859156-A
优先权日:1995-08-31
标 题 :Vapor phase synthesis of rubbery polymers
发明人：CALDERON NISSIM; MUSE JR JOEL; COLVIN HOWARD ALLEN; CASTNER KENNETH FLOYD
权利人:GOODYEAR TIRE & RUBBER
摘要:By utilizing the vapor phase polymerization techniques of the present invention, numerous distinct and highly beneficial advantages are realized. For instance, cis-1,4-polyisoprene rubber and high cis-1,4-polybutadiene rubber having a consistent and controllable molecular weight can be easily and practically prepared without utilizing a solvent. The subject invention more specifically discloses a method for vapor phase polymerizing isoprene into cis-1,4-polyisoprene in a process comprising the steps of: (1) charging into a reaction zone said isoprene and a preformed catalyst system which is made by reacting an organoaluminum compound with titanium tetrachloride, preferably in the presence of at least one ether; wherein the isoprene is maintained in the vapor phase in said reaction zone by a suitable combination of temperature and pressure; (2) allowing said isoprene to polymerize into cis-1,4-polyisoprene in said reaction zone at a temperature within the range of about 0 DEG C. to about 100 DEG C. in the presence of a diarylamine, wherein said reaction zone is a horizontal, stirred reactor of substantially circular cross section containing a centrally-located drive shaft extending longitudinally through said reactor to which are attached a plurality of adjacently located paddles, which paddles cause essentially no forward or backward movement of the cis-1,4-polyisoprene contained in said reactor; and (3) withdrawing said cis-1,4-polyisoprene from said reaction zone.

专利号:US-6310152-B1
优先权日:2000-10-24
标题 :Synthesis of elastomeric high trans-1,4-polybutadiene
发明人：CASTNER KENNETH FLOYD
权利人:GOODYEAR TIRE & RUBBER
摘要:This invention is based upon the unexpected discovery that elastomeric trans-1,4-polybutadiene can be made by utilizing a catalyst system that is comprised of an organocobalt compound, an organoaluminum compound, a para-alkyl substituted phenol, and ortho-phenyl phenol wherein the molar ratio of the para-substituted phenol to the organoaluminum compound is within the range of about 1.2:1 to about 1.8:1, and wherein the molar ratio of the ortho-phenyl phenol to the organoaluminum compound is within the range of about 0.7:1 to about 1.3:1. Accordingly, the elastomeric trans-1,4-polybutadiene made by the process of this invention does not need to be heated, such as in a hot-house, before being used in making rubber stocks. This invention more specifically discloses a process for synthesizing elastomeric trans-1-4-polybutadiene by polymerizing 1,3-butadiene monomer in the presence of a catalyst system that is comprised of an organocobalt compound, an organoaluminum compound, a para-alkyl substituted phenol, and ortho-phenyl phenol, wherein the molar ratio of the para-substituted phenol to the organoaluminum compound is within the range of about 1.2:1 to about 1.8:1, and wherein the molar ratio of the ortho-phenyl phenol to the organoaluminum compound is within the range of about 0.7:1 to about 1.3:1.

专利号:US-3829429-A
优先权日:1970-01-07
标题:Catalytic synthesis of substituted pyridines from acetylenes and nitriles
发明人：CLEMENT R
权利人:DU PONT
摘要:NOVEL PROCESS FOR THE PREPARATION OF SUBSTITUTED PYRIL DINES COMPRISING CONTACTING AN ALKYL, ALKYLENE OR ARYL SUBSTITUTED NITRILE WITH AT LEAST ONE ACETYLENIC COMPOUND OF THE FORMULA R1-C$C-R7, WHEREIN R1 AND R5 MAY BE H, ALKYL, ALKOXY, ALKENYL OR ARALKYL AT ABOUT 150*C.-600* C. IN THE PRESENCE OF A COBALT CATALYST.

专利号:US-6617406-B2
优先权日:2001-08-30
标 题:Synthesis of elastomeric high trans-1,4-polybutadiene
发明人：CASTNER KENNETH FLOYD
权利人:GOODYEAR TIRE & RUBBER
摘要:This invention is based upon the unexpected discovery that elastomeric trans-1,4-polybutadiene can be made by utilizing a catalyst system that is comprised of an organocobalt compound, an organoaluminum compound, a para-alkyl substituted phenol, and ortho-phenyl phenol wherein the molar ratio of the para-substituted phenol to the organoaluminum compound is within the range of about 1.2:1 to about 1.8:1, and wherein the molar ratio of the ortho-phenyl phenol to the organoaluminum compound is within the range of about 0.7:1 to about 1.3:1. Accordingly, the elastomeric trans-1,4-polybutadiene made by the process of this invention does not need to be heated, such as in a hot-house, before being used in making rubber stocks.

专利号:US-5448002-A
优先权日:1994-08-12
标 题 :Synthesis of trans-1,4-polybutadiene having controlled molecular weight
发明人：CASTNER KENNETH F
权利人:GOODYEAR TIRE & RUBBER
摘要:Trans-1,4-polybutadiene is normally synthesized utilizing transition metal or rare earth catalysts. However, molecular weight control is difficult to achieve with such catalysts and the molecular weight of the polymer produced is frequently much higher than desired. By utilizing the catalyst system and techniques of this invention, trans-1,4-polybutadiene can be synthesized continuously to a high level of conversion with molecular weight control being possible. This invention specifically relates to a process for synthesizing trans-1,4-polybutadiene by polymerizing 1,3-butadiene monomer in the presence of a catalyst system which is comprised of an organocobalt compound, an organoaluminum compound and a para-substituted phenol with molecular weight being controlled by conducting the polymerization in the presence of at least one dialkyl sulfoxide, diaryl sulfoxide or dialkaryl sulfoxide. Such polymerizations can be conducted on a batch or a continuous basis. In the case of continuous processes, it is normally desirable to conduct the polymerization in the presence of carbon disulfide as a gel inhibitor.

专利号:US-2003065114-A1
优先权日:2001-08-30
标题:Synthesis of elastomeric high trans-1,4-polybutadiene