Rhodium(III)-Catalyzed<i>N</i>-Nitroso-Directed CH Addition to Ethyl 2-Oxoacetate for Cycloaddition/Fragmentation Synthesis of Indazoles
作者:Jinsen Chen、Pei Chen、Chao Song、Jin Zhu
DOI:10.1002/chem.201404506
日期:2014.10.27
RhIII‐catalyzed N‐nitroso‐directed CH addition to ethyl 2‐oxoacetate allows subsequent construction of indazoles, a privileged heterocycle scaffold in synthetic chemistry, through the exploitation of reactivity between the directing group and installed group. The formal [2+2] cycloaddition/fragmentation reaction pathway identified herein, a unique reactivity pattern hitherto elusive for the N‐nitroso
RH III催化的Ñ亚硝基定向Ç 小时加入到2-氧代乙酸乙酯允许吲唑的后续施工,在合成化学特权杂环支架,通过所述引导组和安装基之间的反应性的开采。本文鉴定的正式[2 + 2]环加成/片段化反应途径,一个独特的反应性模式迄今难以捉摸的Ñ亚硝基氧基,强调正向反应性的分析中有用的C的发展的重要性基于H功能化的综合工具。该协议的综合效用通过三环稠合环系统的合成得到了证明。可用于亚硝基的共价键的多样性应能使本文报道的反应性类型扩展至其他类型杂环的合成。