Cobalt-Catalyzed C−H Nitration of Indoles by Employing a Removable Directing Group
作者:Paridhi Saxena、Manmohan Kapur
DOI:10.1002/asia.201800036
日期:2018.4.4
nitration of 3‐substituted indoles, by using the economical and non‐toxic cobalt nitrate hexahydrate [Co(NO3)2⋅6 H2O] as a catalyst and tert‐butyl nitrite (TBN) as the nitro source, is reported. This approach provides a unique methodology involving a site‐selective C−N bond formation for preparation of C‐2 substituted nitro indoles. Utilization of the tBoc as the removable directing group enhances the
温和和有效的C(SP 2)-H的3-取代的吲哚硝化,通过使用经济,无毒的六水合硝酸钴[Co(NO 3)2 ⋅ 6 H 2 O]作为催化剂,叔丁基亚硝酸盐报道了以(TBN)为硝基源。这种方法提供了一种独特的方法,该方法涉及制备C-2取代的硝基吲哚的位点选择性C-N键形成。将t Boc用作可去除的导向基团增强了该方法的合成效用。