Formation of disubstituted β-lactones using bifunctional catalysis
(Chemical Equation Presented) Acid chlorides and aromatic aldehydes react in the presence of a stoichiometric amount of a tertiary amine and catalytic amounts of a cinchona alkaloid derivative and a Lewis acid to produce β-lactones in high diastereo- and
Calter, Michael A.,Tretyak, Olexandr A.,Flaschenriem, Christine
Chemo-selective copper-catalyzed C-O coupling reactions of phenols with aryl/vinyl halides using enaminone as efficient ligand
The copper-catalyzed Ullmann C-O coupling reactions between phenols and aryl/vinyl halides have been efficiently performed by employing (E)-3-(dimethylamino)-1-(2-hydroxyphenyl)prop-2-en-1-one, an easily available enaminone, as ligand. This new ligand is advantageous for its easy availability, broad applicability and good efficiency. Copyright 2012 John Wiley & Sons, Ltd. Copyright
Wan, Jie-Ping,Wang, Chunping,Liu, Yunyun
experimental part
p. 445 - 447
(2012/09/25)
Diazo reactions with unsaturated compounds: V.1 reaction of phenyl vinyl ether with arenediazonium chlorides
Phenyl vinyl ether reacts with arenediazonium chlorides in aqueous acetone at pH 3-4 in the presence of a catalytic amount of copper(II) chloride to give arylacetaldehydes and small amounts 1-aryl-2-phenoxyethenes. No reaction occurs between the same reactants in the presence of sulfur(IV) oxide. 2000 MAIK "Nauka/Interperiodica".
Naidan
p. 1600 - 1602
(2007/10/03)
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