Synthesis of Indoles and Pyrroles Utilizing Iridium Carbenes Generated from Sulfoxonium Ylides
作者:Janakiram Vaitla、Annette Bayer、Kathrin H. Hopmann
DOI:10.1002/anie.201610520
日期:2017.4.3
and regioselective synthesis of indoles and pyrroles. The tandem action of iridium and Brønsted acid catalysts enables rapid assembly of the heterocycles from unmodified anilines or readily accessible enamines under microwave irradiation. The key mechanistic steps are the catalytic transformation of the sulfoxonium ylide into an iridium–carbene complex, followed by N−H or C−H functionalization of an
金属卡宾可以进行无数的合成转化。硫化氢是金属卡宾的潜在安全前体。在本文中,我们报道了级联反应,其中涉及衍生自亚砜基的类胡萝卜素,用于吲哚和吡咯的高效和区域选择性合成。铱和布朗斯台德酸催化剂的串联作用使未修饰的苯胺或容易得到的烯胺在微波辐射下快速组装成杂环。关键的机械步骤是将亚砜基叶立德催化转化为铱-卡宾络合物,然后分别对苯胺或烯胺进行NH或CH官能化,最后进行酸催化的环化反应。本方法已成功地应用于阿托伐他汀的稠密官能化吡咯亚基的合成。