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
Dual visible-light photoredox and palladium(<scp>ii</scp>) catalysis for dehydrogenative C2-acylation of indoles at room temperature
作者:Manash Kumar Manna、Gurupada Bairy、Ranjan Jana
DOI:10.1039/c7ob01418j
日期:——
A highly regioselective direct C2-acylation of N-pyrimidine protected indoles with aldehydes is reported at roomtemperature through the merger of visible light photoredox and palladium(II) catalysis. Late-stage acylation of tryptophan, selective mono-acylation of carbazole and the syntheses of tubulin inhibitors D-64131 and D-68144 are also demonstrated.
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.
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