162174-56-3Relevant articles and documents
A general and efficient iron-catalyzed benzylation of 1,3-dicarbonyl compounds
Kischel, Jette,Mertins, Kristin,Michalik, Dirk,Zapf, Alexander,Beller, Matthias
, p. 865 - 870 (2008/03/18)
Various CH-acidic 1,3-dicarbonyl compounds and methyl 3-acetamidobut-2- enoate react with benzylic alcohols to give the corresponding 2-benzylated products in good to excellent yield. Typically, reactions proceed under mild conditions (50-80°C; air) in the presence of catalytic amounts of inexpensive iron chloride hexahydrate. The benzylation of 4-hydroxycoumarin gives the pharmaceutically interesting 4-hydroxy-3-(1-phenylethyl)-2H-chromen-2- ones. As an example the anticoagulant Phenprocoumon is prepared in one step from commercially available substrates in 94 % yield.