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4-Methylpyridine is the organic compound with the formula CH 3 C 5 H 4 N. It is one of the three isomers of methylpyridine. This pungent liquid is a building block for the synthesis of other heterocyclic compounds. Its conjugate acid, the 4-methylpyridinium ion, has a pK a of 5.98, about 0.7 units above that of pyridine itself. [1]
Methylpyridinium is prepared by treating pyridine with dimethylsulfate: [2]. C 5 H 5 N + (CH 3 O) 2 SO 2 → [C 5 H 5 NCH 3] + CH 3 OSO − 3. It is found in some coffee products. [3] It is not present in unroasted coffee beans, but is formed during roasting from its precursor chemical, trigonelline. [3]
Need to raise your potassium levels? Try these great potassium-rich foods!
The sodium–potassium pump a critical enzyme for regulating sodium and potassium levels in cells. Potassium is the main intracellular ion for all types of cells, while having a major role in maintenance of fluid and electrolyte balance. [1] [2] Potassium is necessary for the function of all living cells and is thus present in all plant and ...
“The DASH diet is heart-healthy and is rich in foods that have a high content of calcium, magnesium, potassium, protein, and fiber,” explains Marwah Abdalla, M.D., M.P.H., a cardiologist at ...
Anderson also named picoline by combining the Latin words pix (tar) and oleum (oil) because coal tar oil was a source of picoline. [4] [5] By 1870, the German chemist Adolf von Baeyer had synthesized picoline in two ways: by the dry distillation of acroleïnammoniak (CH 2 =CH-CH=N-CHOH-CH=CH 2) [6] and by heating tribromallyl (1,2,3 ...
Potassium lactate may also be used to reduce sodium levels in food products and is commonly used in meat and poultry products. [12] The recommended daily allowance of potassium is higher than that for sodium, [13] yet a typical person consumes less potassium than sodium in a given day. [14]
For this purpose, pyridine derivatives can be eliminated with good leaving groups using strong bases such as sodium and potassium tert-butoxide. The subsequent addition of a nucleophile to the triple bond has low selectivity, and the result is a mixture of the two possible adducts.
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