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)。
Direct Bis-Alkyl Thiolation for Indoles with Sulfinothioates under Pummerer-Type Conditions
作者:Peng Qi、Fang Sun、Ning Chen、Hongguang Du
DOI:10.1021/acs.joc.1c02502
日期:2022.1.21
applications. This approach enabled double C–H thiolation at the C2 and C3 of the indole in one pot. The mechanism studies suggested the thiolation was realized through the sulfoxonium salt rather than sulfenylcarboxylate.
Combined Experimental and Computational Mechanistic Investigation of the Palladium-Catalyzed Decarboxylative Cross-Coupling of Sodium Benzoates with Chloroarenes
作者:Jenna N. Humke、Ryan A. Daley、Aaron S. Morrenzin、Sharon R. Neufeldt、Joseph J. Topczewski
DOI:10.1021/acs.joc.1c00910
日期:2021.9.3
is a mechanistic investigation into the palladium-catalyzed decarboxylative cross-coupling of sodium benzoates and chloroarenes. The reaction was found to be first-order in Pd. A minimal substituent effect was observed with respect to chloroarene, and the reaction was zero-order with respect to chloroarene. Palladium-mediated decarboxylation was assigned as the turnover-limiting step based on an Eyring
been functionalized using this property. Indole also forms indolium, which allows electrophilic addition in acidic conditions, but current examples have been limited to intramolecular reactions. C2 site-selective nucleophilic addition to indole derivatives using fluoroalcohol and a Lewisacid was developed.