Iron(III) Chloride as a Mild Catalyst for the Dearomatizing Cyclization of <i>N</i>-Acylindoles
作者:Jingyu Zhang、Jing Li、Jas S. Ward、Khai-Nghi Truong、Kari Rissanen、Markus Albrecht
DOI:10.1021/acs.joc.0c01373
日期:2020.10.2
A catalytic approach for the preparation of indolines by dearomatizing cyclization is presented. FeCl3 acts as a catalyst to afford tetracyclic 5a,6-dihydro-12H-indolo[2,1-b][1,3]benzoxazin-12-ones in good yields. The cyclization also proceeds with tosylamides forming C–N bonds in 53% yield.
提出了一种通过脱芳香环化反应制备二氢吲哚的催化方法。FeCl 3用作催化剂,以高收率得到四环5a,6-二氢-12 H-吲哚并[ 2,1 - b ] [1,3]苯并恶嗪-12-。环化反应还会继续进行,甲苯磺酰胺以53%的收率形成C–N键。