A Tandem Ring Opening/Closure Reaction in A BF<sub>3</sub>
-Mediated Rearrangement of Spirooxindoles
作者:Xuliang Guo、Qingyu Xing、Kunhua Lei、Daisy Zhang-Negrerie、Yunfei Du、Kang Zhao
DOI:10.1002/adsc.201700728
日期:2017.12.19
spiro‐cyclohexadienones from the PhI(OCOCF3)2‐mediated spiro‐cyclization of N‐substituted benzanilides, with BF3⋅Et2O initiates a tandem ring opening/closure reaction leading to the formation of the biologically interesting 8‐hydroxy‐phenanthridin‐6(5H)‐one compounds. This unique rearrangement pattern involves the ‘migration’ of the electron‐deficient N‐methyl carbamoyl moiety rather than the electron‐rich aryl group
从岛(OCOCF的易于接近螺环己二烯酮的治疗3)2介导的N-取代的benzanilides螺环化,用BF 3 ⋅Et 2所ö发起的串联开环/闭环反应导致生物有趣的形成8-羟基菲啶-6(5 H)-1化合物。这种独特的重排模式涉及缺电子的N-甲基氨基甲酰基部分的“迁移”,而不是先前在所有其他类似转化中观察和报道的富电子芳基。