Merger of Visible-Light Photoredox Catalysis and C–H Activation for the Room-Temperature C-2 Acylation of Indoles in Batch and Flow
作者:Upendra K. Sharma、Hannes P. L. Gemoets、Felix Schröder、Timothy Noël、Erik V. Van der Eycken
DOI:10.1021/acscatal.7b00840
日期:2017.6.2
and versatile protocol for the C–H acylation of indoles via dual photoredox/transition-metal catalysis was established in batch and flow. The C–H bond functionalization occurred selectively at the C-2 position of N-pyrimidylindoles. This room-temperature protocol tolerated a wide range of functional groups and allowed for the synthesis of a diverse set of acylated indoles. Various aromatic as well as
A palladium-catalyzed decarboxylative C2-acylation of indoles with α-oxocarboxylic acids was achieved. This protocol represents a novel and complementary approach to 2-aroylindoles.
Synthesis of 2-Acylated Indoles through Palladium-Catalyzed Dehydrogenative Coupling of N-Pyrimidine-Protected Indoles with Aldehydes and Ethyl Glyoxylate
作者:Ze Tan、Wenduo Wang、Jidan Liu、Qingwen Gui
DOI:10.1055/s-0034-1379935
日期:——
C2-Acylated indoles have been synthesized in good yields through palladium-catalyzed dehydrogenative coupling of N -pyrimidine-protected indoles using aldehydes as the source of acyl reagent and tert -butyl hydroperoxide as the oxidant. 2-Indole carboxylates can be synthesized when aldehydes are substituted by ethyl glyoxylate.
Cobalt-catalyzed intramolecular decarbonylative coupling of acylindoles and diarylketones through the cleavage of C–C bonds
作者:Tian-Yang Yu、Wen-Hua Xu、Hong Lu、Hao Wei
DOI:10.1039/d0sc04326e
日期:——
carbene catalytic systems for the intramolecular decarbonylative coupling through the chelation-assisted C−C bond cleavage of acylindoles and diarylketones. The reaction tolerates a wide range of functional groups such as alkyl, aryl, and heteroaryl groups, giving the decarbonylative products in moderate to excellent yields. This transformation involves the cleavage of two C−C bonds and formation of