Boron Trifluoride Catalyzed Divergent Synthesis of 3-Alkenyl-3-amino-2-oxindoles and Spiro-indeneindolones from Propargylic Alcohols
作者:Sengodagounder Muthusamy、Alagesan Balasubramani、Eringathodi Suresh
DOI:10.1002/adsc.201801106
日期:2019.2.19
expedient method was demonstrated for the synthesis of 3‐alkenyl‐3‐amino‐2‐oxindoles from readily available propargylic alcohols and isatin imines in the presence of BF3 ⋅ Et2O as a catalyst under open‐air atmosphere. The above reaction was time‐dependent and further extended to the one‐pot synthesis of highly substituted spiro‐indeneindolones via 1,3‐amino group migration/Friedel‐Crafts cyclization. This
一种适宜的方法被证明为3-链烯基-3-氨基-2-羟吲哚从容易获得的炔丙醇和靛红亚胺中的BF存在下合成3 ⋅的Et 2 O作为露天气氛下的催化剂。上述反应是时间依赖性的,并进一步扩展到通过1,3-氨基迁移/ Friedel-Crafts环化反应一锅合成的高取代螺-茚并吲哚酮。这种方法可耐受多种官能团,可在室温下以高收率获得原子经济的多用途3-烯基-3-氨基-2-氧吲哚或螺茚烯吲哚酮衍生物。