Treatment of 2,7-diazabiphenylene with thiophosgene in the presence of barium carbonate and water gives the cyclobutapyridine derivative (8) which was shown by 1H n.m.r. spectroscopy to undergo spontaneous configurational change.
在
碳酸钡和
水的存在下用
硫光气处理2,7-二氮杂联二苯产生了环丁
哌啶衍
生物(8),其通过1 H nmr光谱显示出发生了自发的构型变化。