CAS: 52509-52-1; 1-Propanaminium, N,N-Dimethyl-N-Propyl-, Bromide

📜溴丙烷,二甲胺 在 Potassium Carbonate体系中,用 四氢呋喃作为反应溶剂,以97.8 %的收率获得dimethyl Dipropyl Ammonium Bromide
参考文献:A Binary Silicon‐centered Organoboron Catalyst With Superior Performance To That Of Its Bifunctional Analogue
标题:A Binary Silicon‐centered Organoboron Catalyst With Superior Performance To That Of Its Bifunctional Analogue
摘要:摘要 本研究报告指出,硅中心烷基硼烷/铵盐二元(双组分)催化剂在环氧丙烷开环聚合反应中的活性远高于其双官能类似物(单组分)催化剂,在催化剂负载量为 0.01 摩尔%的低催化剂条件下,活性是其双官能类似物的 7.3 倍,在负载量为 0.002 摩尔%的极低催化剂条件下,活性甚至是其双官能类似物的 15.3 倍.通过使用 19F Nmr 光谱,对照实验和理论计算,我们发现中心硅原子显示出适当的电子密度和较大的分子内空腔,这有利于共同激活单体和输送传播链,从而导致比双功能类似物更好的分子内协同效应.研究人员提出了一种独特的双途径启动模式,以解释二元催化系统非同寻常的高活性.这项研究打破了人们对二元路易斯酸/亲核催化剂因熵增加而活性低下的传统印象.
Doi:10.1002/Anie.202312376

专利信息

专利号:US-2008214386-A1
优先权日:2004-03-01
标题:Catalyst for Cyclic Carbonate Synthesis
发明人：TAKAHASHI TOSHIKAZU; WATAHIKI TSUTOMU; YASUDA HIROYUKI; SAKAKURA TOSHIYASU
权利人:TAKAHASHI TOSHIKAZU; WATAHIKI TSUTOMU; YASUDA HIROYUKI; SAKAKURA TOSHIYASU
摘要:Provided are a solid catalyst which gives a cyclic carbonate at a high yield and a high selectivity, which is stable and which may be readily separated after reaction; and a method of industrially advantageous, inexpensive and safe production of a cyclic carbonate by the use of the catalyst. The catalyst contains an inorganic solid substance having a surface modified with an ionic substance containing a Group 15 element; or contains an ionic substance containing a Group 15 element, and an inorganic solid substance. The modifying group for surface modification of an inorganic solid substance is an ionic substance containing a Group 15 element. The ionic substance containing a Group 15 element is at least one substance selected from organic phosphonium salts, organic ammonium salts, organic arsonium salts and organic antimonium salts.