Room Temperature Palladium-Catalyzed Decarboxylative Acyl/Aroylation using [Fe(III)(EDTA)(η<sup>2</sup>-O<sub>2</sub>)]<sup>3−</sup>as Oxidant at Biological pH
作者:Sugandha Sharma、Imran A. Khan、Anil K. Saxena
DOI:10.1002/adsc.201201085
日期:2013.3.11
The purple‐coloured iron peroxo complex [Fe(III)EDTA(η2‐O2)]3− as a novel reagent system for Pd‐catalyzed decarboxylative ortho‐acylation of acetanilides with α‐oxocarboxylic acids at roomtemperature in aqueous media has been realized. This reaction provides an effective access to ortho‐acylacetanilides under mild conditions.
A palladium-catalyzed oxidative C–H bond functionalization/ortho-acylation of acetanilides using easily accessible aldehyde as the acyl source is described. In the presence of a Pd(TFA)2 catalyst and tert-butylhydroperoxide at 90 °C in general, an array of ortho-acylacetanilides can be afforded in good yields.
Toluene derivatives as simple coupling precursors for cascade palladium-catalyzed oxidative C–H bond acylation of acetanilides
作者:Yinuo Wu、Pui Ying Choy、Fei Mao、Fuk Yee Kwong
DOI:10.1039/c2cc37352a
日期:——
A palladium-catalyzed cascade cross-coupling of acetanilide and toluene for the synthesis of ortho-acylacetanilide is described. Toluene derivatives can act as effective acyl precursors (upon sp(3)-C-H bond oxidation by a Pd/TBHP system) in the oxidative coupling between two C-H bonds. This dehydrogenative Pd-catalyzed ortho-acylation proceeds under mild reaction conditions.
Palladium-catalyzed dehydrogenative coupling reactions between acetanilides and benzylicalcohols under aqueous conditions are reported. A wide range of benzophenone derivatives could be obtained in good to excellent yields up to 98 %. Mechanism studies showed that a bimetallic palladium cyclopalladated complex might be involved in the catalysis.
A one-pot process for palladium catalyzed direct C–H acylation of anilines in water using a removable ortho directing group
作者:Fruzsina Szabó、Dániel Simkó、Zoltán Novák
DOI:10.1039/c3ra45160g
日期:——
A new mild, practical method for the synthesis of aminobenzophenone derivatives through a three step one-pot reaction sequence involving acylation of anilines, palladium catalyzed cross-dehydrogenative coupling of the formed anilides and the hydrolytic cleavage is reported. The full reaction sequence was performed under aqueous conditions.