The behaviour of the N,N-dimethyl-, N,N-diethyl- and N,N-diisopropylpyridylcarboxylic amides in the reactions with Et2NLi and iPr2NLi, and a convenient way of synthesis of 2,3- and 3,4-disubstituted pyridines, by the direct lithiation of N,N-diisopropylamides leading subsequently to the ortho new CC bonds formation, are described.
N,N-二甲基-,N,N-
二乙基-和N,N-
二异丙基吡啶基
羧酸酰胺在与Et 2 NLi和iPr 2 NLi的反应中的行为,以及合成2,3-和3的简便方法,描述了通过N,N-
二异丙基酰胺的直接
锂化导致随后的邻位新的CC键形成的4-二取代的
吡啶。