Results 81 to 90 of about 20,444 (199)

NUCHLEOPHILIC SUBSTITUTION REACTION OF CYANIDE AND METHOXYDE IONS TO QUATERNARY MANNICH BASE FROM VANILLIN

Indonesian Journal of Chemistry, 2010
The nucleophilic substitution reaction to quaternary Mannich base from vanillin has been investigated. Mannich reaction to vanillin was carried out by refluxing mixture of vanillin, formaldehyde and dimethyl amine.
Bambang Purwono, Estiana E.P Daruningsih
doaj   +1 more source

Towards an asymmetric β-selective addition of azlactones to allenoates

Beilstein Journal of Organic Chemistry
We herein report the asymmetric organocatalytic addition of azlactones to allenoates. Upon using chiral quaternary ammonium salt catalysts, i.e., Maruoka’s binaphthyl-based spirocyclic ammonium salts, the addition of various azlactones to allenoates ...
Behzad Nasiri, Ghaffar Pasdar, Paul Zebrowski, Katharina Röser, David Naderer, Mario Waser   +5 more
doaj   +1 more source

Solution-Processed White Organic Light-Emitting Diodes with Enhanced Efficiency by Using Quaternary Ammonium Salt Doped Conjugated Polyelectrolyte

, 2016
Solution-processed white organic light emitting diodes (WOLEDs) with quaternary ammonium salt doped water/alcohol soluble conjugated polyelectrolyte, poly­[(9,9-bis­(3′-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluoren ...
Yuan Tian (225002), Xinjun Xu (1449574), Chuang Yao (1793389), Jinshan Wang (1614487), Lidong Li (1449565)   +4 more
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Helvetica Chimica Acta / Chiral Quaternary Ammonium Salt-Catalyzed Enantioselective Addition Reactions of Hydantoins

We herein report a protocol for the asymmetric 1,4-addition of hydantoins to various Michael acceptors by utilizing Cinchona alkaloid-based chiral quaternary ammonium salt catalysts.
Prameshuber, Lucas, Röser, Katharina, Jahangir, Sajid, Mallojjala, Sharath Chandra, Hirschi, Jennifer S., Waser, Mario   +5 more
core   +1 more source

Organo-montimorillonites containing a reactive thiophene group for polythiophenes nanocomposites

Cerâmica
A sodium montmorillonite clay (Na+MMT) was modified with different contents of a reactive salt derived from thiophene (trimethyl-(2-thiophen-3-yl-ethyl)-ammonium bromide) (TMETA). The thiophene salt in the organoclay (xtioMMT) was oxidatively polymerized
J. C. Macêdo-Fonsêca, A. A. A. Tino, M. P. A. Silva-Alves, R. M. Souto-Maior   +3 more
doaj   +1 more source

Reporter-Free Potentiometric Sensing of Boronic Acids and Their Reactions by Using Quaternary Ammonium Salt-Functionalized Polymeric Liquid Membranes

, 2016
The tremendous applications of boronic acids (BAs) in chemical sensing, medical chemistry, molecular assembly, and organic synthesis lead to an urgent demand for developing effective sensing methods for BAs.
Enguang Lv (1844395), Lei Wu (202933), Wei Qin (205374), Xuewei Wang (195027), Dengfeng Yue (1844392)   +4 more
core   +1 more source

Corrosion inhibition performance and mechanism analysis of high-efficiency imidazoline quaternary ammonium salt on Q235

Gongye shui chuli
To further improve the corrosion inhibition efficiency in acid washing environments and reduce costs, an efficient bis-imidazoline quaternary ammonium salt(SMZB) compound was synthesized by using oleic acid, triethylenetetramine,and bromo-n-butane as raw
WANG Pengjie, SONG Yuhao, FAN Lin, DENG Kuanhai, LI Zhonghui, MEI Zongbin, GUO Lei, LIN Yuanhua   +7 more
doaj   +1 more source

Vapor–Liquid Equilibrium Study on Amino Acid + Quaternary Ammonium Salt Aqueous Ternary Systems

In order to expand the knowledge of the soluting-out/in phenomena occurring in aqueous solutions, in this work, several ternary systems of {water + amino acid + quaternary ammonium salt} were subjected to vapor–liquid equilibrium (VLE) measurements at ...
Somayeh Naderi (17374306), Rahmat Sadeghi (1483954), Nosaibah Ebrahimi (1757761)   +2 more
core   +1 more source

Hydrogenation of Alkynes and Olefins Catalyzed by Quaternary Ammonium Salts

Advanced Science
Catalytic hydrogenation of unsaturated hydrocarbons to alkenes and alkanes using molecular hydrogen is one of the most fundamental transformations in organic synthesis.
Qi Guo, Guoli Shen, Guangfu Lu, Jinyi Qian, Qitao Que, Jiuling Li, Yafei Guo, Baomin Fan   +7 more
doaj   +1 more source

Fabrication of Mesoporous ZrO₂ by Using Rosin-Based Quaternary Ammonium Salt

, 2011
Mesoporous zirconias were prepared by precipitation method using rosin-based quaternary ammonium salt as a directing agent. The samples were characterized by means of XRD, FT-IR and N2-adsorption and desorption measurements.
Peng Wang, Yu Xiang Chen, Li Zhi He, Zhen Dong Zhao, Liang Wu Bi   +4 more
core   +1 more source