for the synthesis of 12H-indazolo[2,1-a]cinnolin-12-ones was developed. Significantly, a less developed cationic complex [Ru(p-cymene)(MeCN)3(SbF6)2] was found to be effective for this transformation. In this reaction, a tandem pathway of C–H ruthenation, Ru(II)–carbene formation, migratory insertion and condensation was involved. The results of a primary mechanistic study suggested that the C–H activation
开发了一种鲁棒,高效且可扩展的合成12 H-吲哚并[2,1 - a ] cinnolin-12-ones的方法。重要的是,发现欠发达的阳离子络合物[Ru(对-cymene)(MeCN)3(SbF 6)2 ]对这种转化有效。在该反应中,涉及到了C–H钌化,Ru(II)–卡宾形成,迁移插入和缩合的串联途径。初步机理研究的结果表明,C–H活化过程可能遵循亲电型金属化/去质子化机理。
Meeting organometallic chemistry with drug discovery: C H activation enabled discovery of a new ring system of 12H-Indazolo[2,1-a]cinnolin-12-ones with anti-proliferation activity
A diverse library of newringsystem 12H-indazolo[2,1-a]cinnolin-12-ones have been synthesized efficiently via Ru (II) and Rh (III) catalyzed tandem CH alkylation/[4 + 2] annulation with diazo compounds in high to excellent yields. For the first time, we evaluated the biological activity of these compounds with this new skeleton and found some compounds exhibited high cytotoxic activity against human