作者:V. A. Vasin、M. V. Fadin、I. V. Tarasova
DOI:10.1134/s1070428017120053
日期:2017.12
The reduction of polybrominated o- and p-nitrophenols with granular tin in concentrated aqueous HCl gave polybrominated aminophenols which were diazotized with sodium nitrite in concentrated sulfuric acid at 0°C to obtain polybrominated o- and p-quinone diazides. Their thermolysis with elimination of nitrogen generated ketocarbenes which reacted with acetylacetone to form insertion products at the
在浓盐酸水溶液中用粒状锡还原多溴邻-和对硝基苯酚,得到多溴氨基苯酚,将其与亚硝酸钠在浓硫酸中于0℃下重氮化,得到多溴对-邻和对醌二叠氮化物。它们通过消除氮而热分解生成酮卡宾,酮卡宾与乙酰丙酮反应形成在活化的亚甲基上的插入产物。由邻醌二叠氮化物生成的酮卡宾与典型的双极性亲和剂如乙腈,苄腈,苯乙烯和苯乙炔反应,得到相应的[3 + 2]-环加成产物。