Reactions of Sodium Salts of Tosylhydrazone Compounds with Silver Chromate. Formation of Indazole, Pyrazole, and Benzonitrile Derivatives
作者:Katsuhiro Saito、Takashi Toda、Toshio Mukai
DOI:10.1246/bcsj.57.1567
日期:1984.6
the same conditions, sodium salts of m-nitrobenzaldehyde tosylhydrazone (5), benzylideneacetone tosylhydrazone derivatives (7a and 7b), and β-ionone tosylhydrazone (9) reacted to yield m-nitrobenzonitrile from 5 and pyrazole derivatives from 7a, b, and 9, respectively. m-Nitrobenzonitrile is formed by homolytic fission of nitrogen–nitrogen bond of 5. Formation of the pyrazole derivatives can be explained
使托酮甲苯磺酰腙钠盐与铬酸银反应得到2-甲苯磺酰-2H-吲唑。该反应被认为是通过肼基中间体的环化进行的。在相同条件下,间硝基苯甲醛甲苯磺酰腙 (5)、亚苄基丙酮甲苯磺酰腙衍生物 (7a 和 7b) 和 β-紫罗兰酮甲苯磺酰腙 (9) 的钠盐反应生成间硝基苯甲腈 5 和吡唑衍生物 7a、b 和9、分别。间硝基苯甲腈通过 5 的氮-氮键的均裂裂变形成。吡唑衍生物的形成可以通过相应重氮中间体的分子内 1,3-偶极加成来解释。