作者:P. Z. SLACK、R. SLACK
DOI:10.1038/160437a0
日期:1947.9
A number of attempts have been made to devise general methods for the synthesis of phenazines1,2,3; but in a series of researches carried out during 1945â46 we found that most of the well-known methods failed in the case of some di-alkoxyphenazines. On the other hand, comparatively good results were obtained using the little-known reaction of Waterman and Vivian4, which depends on the treatment of a 2-nitro-or 2:2â²-dinitrodiphenylamine with an âOxygen acceptorâ such as reduced iron, lead or charcoal at a high temperature. In simple cases the reaction presumably proceeds, as suggested by the original authors, through the elimination of oxygen and water, but in the case of the 2: 2â²-dinitro derivatives the course of the condensation is more obscure.
已经有多次尝试制定合成苯嗪的通用方法;但是在1945年至1946年期间进行的一系列研究中,我们发现大多数知名的方法在某些二烷氧基苯嗪的情况下失败。另一方面,使用Waterman和Vivian不太知名的反应取得了相对较好的结果,该反应依赖于在高温下用还原铁、铅或炭等“氧受体”处理2-硝基或2,2'-二硝基二苯胺。在简单情况下,反应可能如原作者所建议的那样,通过去除氧气和水进行,但在2,2'-二硝基衍生物的情况下,缩合过程则更为复杂。