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。