CAS: 6305-43-7; 1,4-Dibromo-2,3-Butanedione

相似化合物

5308-51-0 816-40-0 14396-65-7

2,3-丁二酮置于溴体系中,用 氯仿 作为反应溶剂,化学反应 3.0H,以56%的收率获得产物1,4-二溴-2,3-丁二酮
参考文献:π共轭杂芳族分子的合成,晶体结构,光电性能和电阻记忆应用
标题:π共轭杂芳族分子的合成,晶体结构,光电性能和电阻记忆应用
摘要:设计并合成了三种基于联噻唑或联吡啶的π共轭小分子dpbt,Depbt和depbpy.在depbt和depbpy中,中心核和末端苯基通过c C双键连接,而在dpbt中,它们通过c-c单键结合.比较研究了分子结构变化对其晶体结构,光电性能和薄膜形态的影响.此外,它们的电阻记忆性能是首次被研究.无论depbt-和depbpy为基础的设备表现出典型的二元记忆行为,而基于dpbt的设备没有内存属性.实验结果证实,将c C桥键引入分子中可以增强分子相互作用,这在薄膜上的分子排列中起着重要作用,并且对存储器件中的电荷传输有重要贡献.这项工作表明,芳基乙烯基封端的联噻唑和联吡啶都是有机存储的非常好前途候选者.
DOI:10.1016/j.Tet.2020.131471

专利信息

专利号:US-5576442-A
优先权日:1991-07-22
标 题:Process and chiral intermediates for thiazole antidiabetics
发明人：QUALLICH GEORGE J
权利人:PFIZER
摘要:Two novel optically pure intermediates, (R)-4-(2-bromo-1-hydroxyethyl)-2- trifluoro(-)methylthiazole and (S)-4-oxiranyl-2-trifluoromethylthiazole, which have utility in the synthesis of a potent class of antidiabetic agents. The invention also embraces an enantioselective reduction process for their preparation.

专利号:US-2014315720-A1
优先权日:2012-10-24
标 题 :Polysaccharide ester microspheres and methods and articles relating thereto
发明人：FALLON DENIS G; GARRETT THOMAS S; KIZER LAWTON E; ZAZZARA KAREN L; COMBS MICHAEL T; JOHNSON RICHARD K; DEHART GARY
权利人:CELANESE ACETATE LLC
摘要:A method for producing a polysaccharide ester microsphere may include forming a polysaccharide ester product from a polysaccharide synthesis, wherein the polysaccharide ester product comprises a polysaccharide ester and a solvent; diluting the polysaccharide ester product, thereby yielding a polysaccharide ester dope; and forming a plurality of polysaccharide ester microspheres from the polysaccharide ester dope. Suitable polysaccharides may include, but are not limited to, starch, cellulose, hemicellulose, algenates, chitosan, and any combination thereof. Esters thereof may be organic esters (e.g., acetate and the like), inorganic esters (e.g., sulfonates and the like), or combinations thereof. Further, the solids conent of the polysaccharide ester dope, in some instances, may be greater than about 16 wt %.