Tunable Single and Double γ‐C−H Arylation of Phenylacetamides Directed by
<i>o</i>
‐Aminophenols
作者:Zhi Tu、Yi Du、Xiaoji Cao、Yunyun Liu
DOI:10.1002/adsc.201900866
日期:2019.11.5
available o‐aminophenols (OAPs) have been identified as practical directing component for the Pd‐catalyzed aromatic γ‐C−H bond arylation of phenylacetamides. Notably, the selective single and double arylation of the C−H bond(s) in the γ‐potion has been independently realized by simply modifying reaction conditions. The catalytic system of Pd(CF3OO)2/K2S2O8/K2CO3 enables the selective single C−H arylation
廉价且容易获得的邻氨基苯酚(OAP)已被确定为苯乙酰胺在Pd催化的芳族γ-C-H键芳基化反应中的实际指导成分。值得注意的是,通过简单地修改反应条件就可以独立地实现γ部分中CH键的选择性单芳基化和双芳基化。Pd(CF 3 OO)2 / K 2 S 2 O 8 / K 2 CO 3的催化体系能够实现选择性的单一CH芳基化。另一方面,在KIO 3 / K 2 CO 3存在下催化Pd(OAc)2 诱导两个γ-C-H键的选择性芳基化。