Iron-Catalyzed Oxyalkylation of Terminal Alkynes with Alkyl Iodides
A general oxyalkylation of terminal alkynes enabled by iron catalysis has been developed. Primary and secondary alkyl iodides acted as the alkylating reagents and afforded a range of α-alkylated ketones under mild reaction conditions. Acetyl tert-butyl peroxide (TBPA) was used as the radical relay precursor, providing the initiated methyl radical to start the radical relay process. Preliminary mechanistic studies were conducted, and late-stage functionalizations of natural product derivatives were performed.
Friedel-crafts acylation of arenes with carboxylic acids using polystyrene-supported aluminum triflate
Cross-linked polystyrene-supported aluminum triflate (Ps-Al(OTf) 3) has been shown to be a mild, efficient, and chemoselective heterogeneous Lewis acid catalyst for the acylation of aromatic compounds. The catalyst can be easily prepared from cheap starting materials, is stable (as a bench top catalyst) and is reusable.
Boroujeni, Kaveh Parvanak,Parvanak, Kamran
experimental part
p. 155 - 163
(2012/01/02)
Friedel-Crafts acylation of arenes with carboxylic acids using silica gel supported AlCl3
Aromatic compounds react smoothly with carboxylic acids in the presence of silica gel supported aluminium trichloride to afford the corresponding ketones with high regioselectivity in high to excellent yields. The catalyst is stable (as a bench top catalyst) and can be easily recovered and reused without appreciable change in its efficiency. tuebitak.
Parvanak Boroujeni, Kaveh
experimental part
p. 621 - 630
(2010/11/04)
Ketone synthesis under neutral conditions. Cu(I) diphenylphosphinate-mediated, palladium-catalyzed coupling of thiol esters and organostannanes
(Matrix presented) A versatile approach to ketone synthesis is described. The reaction relies on the palladium-catalyzed, copper diphenylphosphinate-mediated coupling of thiol esters with organostannanes under neutral reaction conditions. This reaction complements the previously described coupling of thiol esters with boronic acids that used dual thiophilic-borophilic activation methodology.
Wittenberg, Ruediger,Srogl, Jiri,Egi, Masahiro,Liebeskind, Lanny S.
p. 3033 - 3035
(2007/10/03)
Efficient acylation of toluene and anisole with aliphatic carboxylic acids catalysed by heteropoly salt Cs2.5H0.5PW12O40
Heteropoly salt Cs2.5H0.5PW12O40 is a highly efficient and reusable solid acid catalyst for the liquid-phase acylation of toluene or anisole with C2 - C12 aliphatic carboxylic acids.
Kaur, Jaspal,Kozhevnikov, Ivan V.
p. 2508 - 2509
(2007/10/03)
SYNTHESE ET ETUDE DE LA DEGRADATION PHOTOCHIMIQUE DE TENSIO-ACTIFS CATIONIQUES PHOTOCLIVABLES
A homologous series of photocleavable cationic surfactants was prepared.These aryl-alkyl-ketone type surfactants have the following structure .Their critical micelle concentration in water was determined.The photodegradation study has shown that the cleavage occurs with a high quantum yield by a Norrish II mechanism with formation of alkene, substituted acetophenone and cyclobutanols.The photochemical yield of cleavage reaches 75 percent with formation of a hydrophilic (substituted acetophenone) and a hydrophobic derivative (alkene).
Strub-Leconte, M. P.,Riess, G.
p. 137 - 144
(2007/10/02)
Friedel-Crafts Acylation of Toluene and p-Xylene with Carboxylic Acids Catalyzed by Zeolites
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Chiche, Bich,Finiels, Annie,Gauthier, Catherine,Geneste, Patrick
p. 2128 - 2130
(2007/10/02)
Synthesis of Some New 1-Phenylalkan-1,2-diondioximes
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Beger, J.,Thielemann, C.
p. 137 - 148
(2007/10/02)
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