1-ethylpyridinium

Early in their work on molten salt electrolytes for thermal batteries, the Air Force Academy researchers surveyed the aluminium electroplating literature for electrolyte baths that might be suitable for a battery with an aluminium metal anode and chlorine cathode. They found a 1948 patent describing ionically conductive mixtures of AICI3 and 1-ethylpyridinium halides, mainly bromides [6]. Subsequently, the salt 1-butylpyridinium chloride/AlCl3 (another complicated pseudo-binary)... 

Irradiation of an aqueous solution of 2-azido-1-ethylpyridinium tetrafluoroborate (3) results in the formation of diazepinone 4.156... 

In many ways, chloroaluminate molten salts are ideal solvents for the electrodeposition of transition metal-aluminum alloys because they constitute a reservoir of reducible aluminum-containing species, they are excellent solvents for many transition metal ions, and they exhibit good intrinsic ionic conductivity. In fact, the first organic salt-based chloroaluminate melt, a mixture of aluminum chloride and 1-ethylpyridinium bromide (EtPyBr), was formulated as a solvent for electroplating aluminum [55, 56] and subsequently used as a bath to electroform aluminum waveguides [57], Since these early articles, numerous reports have been published that describe the electrodeposition of aluminum from this and related chloroaluminate systems for examples, see Liao et al. [58] and articles cited therein. 

Kosower in 1958 was the first to use solvatochromism as a probe of solvent polarity. The relevant Z-scale is based on the solvatochromic shift of 4-methoxycarbonyl-1-ethylpyridinium iodide (1). Later, Dimroth and Reichardt suggested using betain dyes, whose negative solvatochromism is exceptionally large. In particular, 2,6-... 

Methyl-3,4-dihydro-2tf-pyrido[l,2-a]pyrimidin-2-one is used in fluorescence (chiral) derivatization of carboxylic acids in HPLC with different 2-substituted 2H-benzotriazoles 688 in the presence of 2-bromo-1-ethylpyridinium tetrafluoroborate at room temperature (89MI2, 89MI15). This sensitive method has proved useful for the determination of carboxylic acids (e.g., ibuprofen) in small amounts of biological samples (89MI2). 

Ethylpyridinium tetrafluoroborate, a readily accessible ionic liquid, is an effective solvent for BINOL-promoted enantioselective reduction of aryl alkyl ketones by LAH.324 A chiral diol modifies LAH reagents to give up to 98% ee.325... 

C7H10BrN 1-ethylpyridinium bromide 1906-79-2 25.00 1.3691 2 11384 C7H12N20 cis-2-amino-4-cyclohexene-1-carboxamide 111302-96-6 25.00 1.0278 2... 

The early work mainly used alkylammonium and alkylphosphonium salts dispersed on commercially available packing materials such as chromosorb [25-27]. These packed SILP columns had two major drawbacks, namely, low thermal stability (Tjjjjx < 200 °C) and poor separation efficiency. One of the first examples of an IL overcoming these limitations was 1-ethylpyridinium bromide ([EPy]Br)... 

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