2-halobenzonitriles is presented. The reaction proceeds through a domino reaction sequence, consisting of a regioselective palladium-catalyzed coupling of monosubstituted hydrazines with 2-halobenzonitriles, followed by an intramolecular hydroamination through a 5-exo-dig cyclization and subsequent isomerization to directly afford a wide variety of substituted 2H-indazole analogues in good to excellent yields
提出了从容易获得的2-卤代
苄腈中选择性合成3-
氨基-2 H-
吲唑的新方法。该反应通过多米诺反应顺序进行,该顺序由单取代的
肼与2-卤代
苄腈的区域选择性
钯催化偶联,然后通过5-exo-dig环化和随后的异构化进行分子内加
氢胺化,直接得到各种取代的2 H-
吲唑类似物以良好或优异的产率。