7,7-Dipyridyl-2,6-di-<i>tert</i>-butyl-<i>p</i>-quinone Methides: Synthesis, Complexation with Silver(I) Ion, and Oxidation to Their Pyridine<i>N</i>-Oxide
作者:Kouzou Matsumoto、Junya Ikeda、Hiroyuki Kurata、Takeshi Kawase、Masaji Oda
DOI:10.1246/cl.2006.74
日期:2006.1
A series of 7,7-dipyridyl-p-quinone methides are prepared from the corresponding dipyridylketones with 4-lithio-2,6-di-tert-butylphenoxide followed by dehydration. 7,7-Bis(2-pyridyl)-p-quinone methide formed the binuclear Ag(I) complex in which the quinone methide rings are deformed to the boat form. Oxidation of 7,7-dipyridyl-p-quinone methides gave the corresponding bis(pyridine N-oxide)s.
一系列7,7-二吡啶基-对醌甲烷化合物是通过相应的二吡啶基酮与4-锂-2,6-二叔丁基苯酚氧化物反应,随后进行脱水制备的。7,7-双(2-吡啶基)-对醌甲烷形成了一个双核Ag(I)配合物,其中醌甲烷环变形为船型结构。对7,7-二吡啶基-对醌甲烷进行氧化反应,得到了相应的双(吡啶N-氧化物)。