四丁基溴化铵。四丁基溴化铵，别称溴化四丁基铵，是一种有机盐，分子式为C??H??BrN，纯品为白色晶体或粉末，有潮解性，具有特殊气味，在常温、常压下稳定。
Salen—A1C1/n—Bu4NBr体系在催化酯交换中协同效应研究 冯秀娟,吕小兵,何仁 (大连理工大学精细化工国家重点实验室,辽宁大连116012) 捅要:碳酸二甲酯是一种有多种用途的环境友好化学品,主要由甲醇氧化羰基化法(非光气 法)和甲醇光气法(光气法)合成,这两种方法都使用了剧毒或有毒的光气和一氧化碳.而酯 ...
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"IBX/n-Bu4NBr/CH2Cl2-H2O: A new mild system for selective oxidation of secondary alcohols" Tetrahedron 2005, 61, 8995–9000. (b) Kuhakarn, C.; Kittigowittana, K.; Ghabkham, P.; Pohmakotr, M.; Reutrakul, V. "Mild oxidation of alcohols with o-iodoxybenzoic acid (IBX) in a ...
为此研究了Salen-Al配合物体系催化碳酸乙烯酯与甲醇酯交换反应生成碳酸二甲酯的行为.证明了Salen-Al配合物体系不仅是环氧烷烃与二氧化碳合成碳酸乙烯酯的优良催化剂,而且也能很好地催化后续酯交换反应.发现最佳催化剂是Salen-AlCl/n-Bu4NBr,它们间存在协同效应.测得最佳反应条件是温度120℃,反应时间2 h,n(MeOH):n...
G. C. PapavassiliouJohn Wiley & Sons, Ltd.Journal of Raman SpectroscopyZambounis, J. S., Kamitsos, E. I., Patsis, A. P. & Papavassiliou, G. C. Resonance Raman and far-infrared studies of n-Bu4NI3 and n-Bu4NBr3. J. Raman Spectrosc. 23, 81-85 (1992)....
MOF-5/n-Bu4NBr: an efficient catalyst system for the synthesis of cyclic carbonates from epoxides and CO2under mild conditionsElectronic supplementary info... MOF-5/n-Bu4NBr: An efficient catalyst system for the synthesis of cyclic carbonates from epoxides and CO2 under mild conditions. Song ...
3.7. A possible mechanism for the present n-Bu4NBr/n- Bu3N-catalyzed one-pot synthesis of dimethyl carbonate From Table 1, it can be concluded that dimethyl carbonate was produced from the transesterification of methanol with 2a that was formed from SO and CO2. As easily seen from Fig. 1...
Synthesis of cyclic carbonate by CO2 fixation to epoxides using interpenetrated MOF-5/n-Bu4NBrPhase-pure interpenetrated MOF-5 ([Zn4(O)(BDC)3]) was synthesized by pH* control in a reaction medium, and its stability in the presence of epoxides was confirmed by powder X-ray diffraction.....
Interestingly, addition of n-Bu4NBr could improve the activity (entry 3 vs.7). Notably, the anion of catalyst II has great influence on reactivity. The yield of 3 was found to be n-Bu4NBr > n-Bu4NCl > n-Bu4NF (entries 5–7), being presumably correlated with nucleophilicity and ...