Reductive Acylamination of Pyridine N-Oxide with Aminopyridines and Their N-p-Tolylsulfonyl Derivatives
作者:M. A. Solekhova、Yu. V. Kurbatov
DOI:10.1007/s11178-005-0134-x
日期:2005.1
Pyridine N-oxide reacts with 2- and 3-aminopyridines and their N-p-tolylsulfonyl derivatives in alkaline medium in the presence of p-toluenesulfonyl chloride to give N-p-tolylsulfonyl-2,2′- and 2,3′-dipyridylamines, respectively, as a result of reductive acylamination. In the reactions with 4-aminopyridine and 4-p-tolylsulfonyl-aminopyridine, their N-p-tolylsulfonyl- and N,N-bis(p-tolylsulfonyl) derivatives are formed, while reductive acylamination does not occur.
N-氧化吡啶与2-和3-氨基吡啶及其N-对甲苯磺酰基衍生物在碱性介质中在对甲苯磺酰氯存在下反应,分别生成N-对甲苯磺酰基-2,2'-和2,3'-联吡啶胺,作为还原酰胺化的结果。在与4-氨基吡啶和4-对甲苯磺酰氨基吡啶的反应中,形成它们的N-对甲苯磺酰基和N,N-双(对甲苯磺酰基)衍生物,但不发生还原酰胺化。