Palladium-Catalyzed, Highly Efficient, Regiocontrolled Arylation of Electron-Rich Allylamines with Aryl Halides
作者:Yuheng Deng、Zhen Jiang、Min Yao、Dan Xu、Lingjuan Zhang、Huanrong Li、Weijun Tang、Lijin Xu
DOI:10.1002/adsc.201100835
日期:2012.3.16
and regioselective palladium‐catalyzed Heck coupling of aryl bromides with electron‐rich allylamine derivatives is described. It was found that the choice of solvent, olefin, ligand and additive had a fundamental influence on the regioselectivity and reactivity of the reaction. The combination of palladium acetate [Pd(OAc)2] and 1,3‐bis(diphenylphosphino)propane (dppp) in ethylene glycol (EG) constitutes
描述了芳基溴化物与富电子烯丙基胺衍生物的高效和区域选择性钯催化的Heck偶联。发现溶剂,烯烃,配体和添加剂的选择对反应的区域选择性和反应性具有根本影响。乙二醇(EG)中乙酸钯[Pd(OAc)2 ]和1,3-双(二苯基膦基)丙烷(dppp)的组合构成了N -Boc-烯丙胺(叔丁基)内部芳基化的高效催化剂体系芳基二碳酸二甲酯)与芳基溴化物具有良好的区域选择性,而催化剂体系由Pd(OAc)2组成铵,四丁基溴化铵(TBAB)和2,2,6,6-四甲基-1-哌啶氧(TEMPO)添加剂允许多种芳基溴化物的与有效地反应Ñ,ñ - (BOC)2 -allylamine(二-叔-水中的烯丙基二碳酸二丁酯)以高产率专门提供线性(E)-烯丙胺产品。