In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Regioselective metalation of the 4-position of pyridine. New and convenient alkylation and acylation of 3-amino-5-methoxypyridine, published in 1981-08-14, which mentions a compound: 77903-28-7, mainly applied to regioselective lithiation pyridine derivative; alkylation pyridinamine; acylation pyridinamine, Computed Properties of C7H10N2O.
The reaction of 3-methoxy-5-pivaloylaminopyridine with BuLi at low temperature in THF gives the 4-lithiopyridines, which react with various electrophiles to give the corresponding 4-substituted 3-methoxy-5-pivaloylaminopyridines. The conversion of the 5-pivaloylamino group to other substituents via the pyridyl radical was also examined
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