نتایج جستجو برای: quaternization
تعداد نتایج: 182 فیلتر نتایج به سال:
Rechargeable aluminium (Al) batteries (RABs) have long-been pursued due to the high sustainability and three-electron-transfer properties of Al metal. However, limited redox chemistry is available for rechargeable batteries, which restricts exploration cathode materials. Herein, we demonstrate an efficient Al–amine battery based on a quaternization reaction, in nitrogen (radical) cations (R3N.+...
Recently we reported the preparation and properties of some 2-(2or · 3-furyl)benzothiazoles1• Like many other thiazoles2 , due to their weak basic character they can give quaternary salts. Comparing 2-(2-methyl-3-furyl)benzothiazoles with the 2-(5-methyl-2-furyl) analogue it was observed that the nucleophilicity (and basicity) of benzothiazole nitrogen is influenced by the position of the methy...
Some aporphine alkaloids, such as crebanine, were found to present arrhythmic activity and also higher toxicity. A series of derivatives were synthesized by using three kinds of aporphine alkaloids (crebanine, isocorydine, and stephanine) as lead compounds. Chemical methods, including ring-opening reaction, bromination, methylation, acetylation, quaternization, and dehydrogenation, were adopted...
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