Direct C≡C Triple Bond Formation from the C=C Double Bond and Direct Hydroxylation into the<i>o</i>-Position of a Nitro Group on the Benzene Nucleus with Potassium<i>t</i>-Butoxide in<i>N</i>,<i>N</i>-Dimethylformamide in the Air
作者:Shuzo Akiyama、Kunihiko Tajima、Shin’ichi Nakatsuji、Kenichiro Nakashima、Kazuko Abiru、Miwa Watanabe
DOI:10.1246/bcsj.68.2043
日期:1995.7
4-diethylamino-4′ -nitrostilbene was measured to identify an anion radical species expected for explanation of the mechanism of the dehydrogenation reaction. Further, cyclic voltammetric measurements of a series of stilbenes and diphenylacetylenes were carried out in connection with the above mechanism. In many cases, interestingly, the use of a large excess of t-BuOK brought about succeeding hydroxylation
在空气中的 N,N-二甲基甲酰胺中用叔丁醇钾 (t-BuOK) 处理从 C=C 双键直接形成 C≡C 炔键的新方法和简便方法已在 9,10-双(4-取代苯乙烯基)蒽系列、4-取代4'-硝基二苯乙烯系列和1-(对硝基苯基)-4-(对-取代苯基)-1,3-丁二烯系列;已经审查了其范围和局限性。测量针对 4-二乙氨基-4'-硝基二苯乙烯的反应的 ESR 光谱,以确定预期用于解释脱氢反应机理的阴离子自由基种类。此外,结合上述机理进行了一系列二苯乙烯和二苯乙炔的循环伏安测量。在许多情况下,有趣的是,使用大量过量的 t-BuOK 导致后续羟基化到苯核上硝基的邻位。简单的羟基化可用于合成取代的 5-(芳基乙炔基)-2-硝基苯酚,...