CAS: 1464-53-5; 2,2'-Bioxirane

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CAS号299-70-7 DL-1,4-二溴-2,3-二丁醇 | CAS号6968-16-7 DL-苏糖醇

2,3-二溴-1,4-丁二醇置于氢氧化钾体系中,用 乙醚 用作溶剂,化学反应生成双环氧化丁二烯
参考文献:拉曼,红外和微波光谱以及内消旋双环氧乙烷的构象偏好
标题:拉曼,红外和微波光谱以及内消旋双环氧乙烷的构象偏好
摘要:摘要 记录了液态和固态内消旋双环氧乙烷的振动红外光谱和拉曼光谱以及气相的红外光谱.此外,还记录了 40 至 18 Ghz 的微波旋转光谱.振动光谱表明在流体相中存在两种构象,但在固态中只有一种.红外和拉曼活动以及气相带轮廓表明具有 Ci 分子对称性的反式构象异构体比 Gauche 构象异构体(c1 对称性)更稳定.两对拉曼谱线的变温研究与液态下的 δh 值为 0.31+/-0.10 Kcal/mol.旋转常数 (A=9187.45+/-0.04,B=2651.80+/-0.01,C=2608.92+/-0.01 Mhz ) 和偶极矩 (μ Total =3.03 D ) 被确定为 Gauche 构象异构体.对于 60°的 H-C-C'-H' 二面角,模型计算给出了与观测到的旋转常数的可接受匹配.讨论了内消旋双环氧乙烷与其他类似三元环化合物的关系.
Doi:10.1016/s0022-2860(00)00437-3

专利信息

专利号:US-2023348657-A1
优先权日:2020-07-23
标题 :Synthesis of linear polyoxazolidinones using uretdiones as diisocyanate component
发明人：QUELL AGGELIKI; THOMAS HANS-JOSEF; ELING BEREND
权利人:BASF SE
摘要:A process for preparing a thermoplastic polymer involves reacting at least components (a) to (b), in the presence of a catalyst composition (c). Component (a) is an isocyanate composition containing at least one uretdione diisocyanate (a-i), and component (b) is an epoxide composition containing at least one diepoxide (b-i). The catalyst composition (c) contains at least one ionic liquid (c-i), preferably selected from 1-ethyl-3-methyl imidazolium bromide, 1-benzyl-3-methyl imidazolium chloride. 1-butyl-1-methylpiperidinium chloride, 1-ethyl-2,3-dimethylimidazolium bromide, 1-(2-hydroxyethyl)-3-methyl imidazolium chloride, butyl-1-methylpiperidinium acetate, or mixtures of two or more thereof. A thermoplastic polymer obtained or obtainable from the process is useful for the preparation of a fibre or a molded article or as a modifier for another thermoplastic material.

专利号:US-12215369-B2
优先权日:2019-03-01
标题:Method for the in vivo synthesis of 4-hydroxymethylfurfural and derivatives thereof
发明人：ALEXANDRINO PAULO MOISES RADUAN; GOUVEA IURI ESTRADA; QUEIROZ VERONICA LEITE
权利人:BRASKEM SA
摘要:The present disclosure provides recombinant microorganisms and methods for the production of 4-HMF, 2,4-furandimethanol, furan-2,4-dicarbaldehyde, 4-(hydroxymethyl)furoic acid, 2-formylfuran-4-carboxylate, 4-formylfuran-2-carboxylate, and/or 2,4-FDCA from a carbon source. The method provides for engineered microorganisms that express endogenous and/or exogenous nucleic acid molecules that catalyze the conversion of a carbon source into 4-HMF, 2,4-furandimethanol, furan-2,4-dicarbaldehyde, 4-(hydroxymethyl)furoic acid, 2-formylfuran-4-carboxylate, 4-formylfuran-2-carboxylate, and/or 2,4-FDCA. The disclosure further provides methods of producing polymers derived from 4-HMF, 2,4-furandimethanol, furan-2,4-dicarbaldehyde, 4-(hydroxymethyl)furoic acid, 2-formylfuran-4-carboxylate, 4-formylfuran-2-carboxylate, and/or 2,4-FDCA.

专利号:US-3888844-A
优先权日:1971-09-10
标 题:Halogenated esters of phosphorus-containing acids (ii)
发明人：D ALELIO GAETANO F
权利人:ALELIO GAETANO F D
摘要:This invention deals with new phosphorus containing polymeric esters having pendent groups therein of the formula OBTAINED BY THE REACTION OF A POLYMER HAVING AT LEAST 2 AND PREFERABLY AT LEAST 4 HYDROXY GROUPS THEREIN WITH A PHOSPHORUSHALOGEN COMPOUND OF THE FORMULA XP(O) (ORCX CXR'')2 wherein: R represents a divalent hydrocarbon radical containing 1-20 carbon atoms; R'' represents X, hydrogen or R''''; R'''' represents a monovalent hydrocarbon radical containing 1-20 carbon atoms; and X represents chlorine or bromine. Somewhat related polymers are also disclosed as derived by the reaction of WHEREIN Q'' is an organic moiety, n'' has a value of at least one, n'''' is one or two, R'''''' represents hydrogen or a monovalent hydrocarbon group of 1-20 carbon atoms, and the other symbols have the same meaning as defined above. Also disclosed are the reaction products of the phosphite compound HOP(ORCX CXR'')2 with an aldehyde and an organic nitrogen compound having one or two hydrogen atoms on the nitrogen, or with a compound having an ethylenic group therein. These new ester polymers and compounds are useful particularly as fire retardants, agricultural chemicals, fuel additives, plasticizers, monomers and intermediates for the synthesis of other useful derivatives.

专利号:US-7968673-B2
优先权日:2007-02-20
标 题:Polyazacrown-based materials for mercury capture and synthesis of those materials
发明人：REDKO MIKHAIL Y; JACKSON JAMES E; TARABARA VOLODYMYR; TAUROZZI JULIAN
权利人:UNIV MICHIGAN STATE
摘要:Polyazacrown polymers based on the azacrown monomer 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane (“H 6 Aza222â€?) are disclosed. Azacrown monomer units are preferably linked with a suitable linking agent, and the resulting polymers are can absorb mercury from a water stream and form a stable complex therewith. Methods of making and using the polyazacrown polymers are also disclosed. The polymers have a high absorption capacity for and selectivity towards mercury, which properties are useful for the remediation of mercury-contaminated water. The polymers can be regenerated by the efficient removal of the absorbed mercury. Further, the absorbed mercury that is liberated from the polyazacrown polymers can be effectively concentrated and captured to prevent its re-release into the environment.

专利号:US-2025188222-A1
优先权日:2022-02-23
标 题:Synthesis of phosphonated polymer resins for the extraction of rare-earth elements
发明人：ARCHER WILLIAM RYAN; SCHULZ MICHAEL D
权利人:VIRGINIA TECH INTELLECTUAL PROPERTIES INC
摘要:In one aspect, the disclosure relates to the use of poly(diethylenepolyamine) derivatives for the extraction of metals, in particular rare-earth metals. In another aspect the disclosure relates to articles and methods for extracting rare-earth metals.

专利号:US-5278266-A
优先权日:1991-02-06
标 题 :Synthesis of poly(vinyl phosphonic acid)
发明人：BRAYBROOK JULIAN H; ELLIS JOHN
权利人:BRITISH TECH GROUP
摘要:Poly(vinyl phosphonic acid) is synthesized by polymerizing vinyl phosphonyl dichloride in the presence of a cross-linker such as formaldehyde or 1,3-butadiene di-epoxide, with a free-radical initiator. The product can be reacted with aluminosilicate glass to form an improved cement.