耦合在一起:借助通用的催化剂体系(Pd(TFA)2 / Ag 2 CO 3 /丙酸),富电子和不足的苯甲酸都可以作为芳构化试剂,通过以下两种方法的结合直接将多种吲哚官能化脱羧和CH键活化。根据苯甲酸的性质,该反应选择性地发生在吲哚的C2或C3位置,这可能是由两种不同的催化途径引起的(请参阅方案; TFA =三氟乙酸盐)。
Intermolecular Decarboxylative Direct C-3 Arylation of Indoles with Benzoic Acids
作者:Josep Cornella、Pengfei Lu、Igor Larrosa
DOI:10.1021/ol902304n
日期:2009.12.3
A palladium catalyzed C-H activation of indoles and a silver catalyzed decarboxylative C-C activation of ortho substituted benzoic acids are synergistically combined to synthesize indoles arylated exclusively in the C-3 position. This novel decarboxylative C-H arylation methodology is compatible with electron-donating and -withdrawing substituents in both coupling partners.
A Versatile Catalyst for Intermolecular Direct Arylation of Indoles with Benzoic Acids as Arylating Reagents
作者:Jun Zhou、Peng Hu、Min Zhang、Shijun Huang、Min Wang、Weiping Su
DOI:10.1002/chem.201000529
日期:2010.5.25
(Pd(TFA)2/Ag2CO3/propionic acid) both electron‐rich and ‐deficient benzoicacids serve as arylating reagents for the direct functionalization of a wide rage of indoles by a combination of decarboxylation and CH bond activation. Depending on the nature of the benzoicacids, the reaction occurs selectively at either the C2‐ or C3‐position of indoles, which may arise from two different catalytic pathways (see scheme;
耦合在一起:借助通用的催化剂体系(Pd(TFA)2 / Ag 2 CO 3 /丙酸),富电子和不足的苯甲酸都可以作为芳构化试剂,通过以下两种方法的结合直接将多种吲哚官能化脱羧和CH键活化。根据苯甲酸的性质,该反应选择性地发生在吲哚的C2或C3位置,这可能是由两种不同的催化途径引起的(请参阅方案; TFA =三氟乙酸盐)。