Nucleophilic Addition of Grignard Reagents to 3–Acylindoles: Stereoselective Synthesis of Highly Substituted Indoline Scaffolds
作者:Lu Wang、Yushang Shao、Yuanhong Liu
DOI:10.1021/ol301750b
日期:2012.8.3
3-Acylindoles undergo nucleophilic-type reactions with Grignardreagents to efficiently afford either cis- or trans-substituted indolines, depending on the different quenching procedures. The enolate intermediate could be trapped by aryl acyl chlorides to provide indolines bearing a quaternary carbon center with high stereoselectivity. In contrast, the use of benzyl bromide as an electrophile results
Copper-promoted decarboxylative direct C3-acylation of N-substituted indoles with α-oxocarboxylic acids
作者:Lin Yu、Pinhua Li、Lei Wang
DOI:10.1039/c3cc40389k
日期:——
A novel and efficient Cu-promoted decarboxylative direct C3-acylation of N-substituted indoles with α-oxocarboxylic acids for the synthesis of 3-acylindoles was developed.
A novel palladium-catalyzed carbonylation of indoles with CO and aromatic boronic acids for the synthesis of indol-3-yl aryl ketones was developed. The reaction tolerates a wide range of functional groups and gives a variety of valuable indol-3-yl aryl ketones in high yields under mild conditions.
Facile Synthesis of Fully Substituted Dihydro-β-carbolines via Brønsted Acid Promoted Cascade Reactions of α-Indolyl Propargylic Alcohols with Nitrones
作者:Lu Wang、Xin Xie、Yuanhong Liu
DOI:10.1021/ol302695p
日期:2012.12.7
Brønsted acid promoted cyclizations of α-indolyl propargylic alcohols with nitrones is described. The use of nitrones bearing alkenyl or electron-rich aryl groups as the R4 substituent dramatically switches the reaction pathway to afford tetrasubstituted alkenes and amines, which is assumed to proceed through a rearrangement reaction involving N–O bond cleavage and 1,2-migration of the R4 group to an adjacent
An efficient and general reductive heteroarylation approach toward the synthesis of bisindolylmethane, bispyrrolylmethane, and indolylpyrrolylmethane derivatives has been developed. Thus, treatment of acylpyrrole or acylindole derivatives with indoles or pyrroles in the presence of a combination of sodium borohydride and acetic acid resulted in the formation of the title compounds in moderate to excellent