led to the formation of the previously reported 1,6-diazathianthrene as a by-product in a 22% yield. The new ring systems were characterized by a combination of 13C nmr and 1H lanthanide-induced shifts using Eu(fod)3.
据报道,以前未知的1,7-1,8-和1,9-二氮杂
蒽蒽的合成。前两种体系是通过2,3-二巯基
吡啶的二价阴离子与3-
氯-4-
硝基吡啶-1-氧化物的缩合制备的,而后者采用了2-
氯-3-
硝基吡啶。1,9-二氮杂
蒽蒽的制备还导致了先前报道的副产物1,6-二氮杂
蒽蒽的形成,产率为22%。新环系统的特征是使用Eu(fod)3结合13 C nmr和1 H
镧系元素引起的位移。