Mandelic Acid as Synthetic Equivalent of Benzoyl Carbanion. Synthesis of Nitrobenzophenones
作者:José R. Pedro、Gonzalo Blay、Luz Cardona、Isabel Fernández、Raquel Michelena、Teresa Ramírez、Rafael Ruiz-García
DOI:10.1055/s-2003-42123
日期:——
p-fluoronitrobenzenes, followed by hydrolysis of theacetal moiety and oxidative decarboxylation of the resulting α-hydroxyacids. The whole sequence involves the use of mandelic acid as synthetic equivalent of the benzoyl carbanion.
Highly Diastereoselective Arylation of (<i>S</i>)-Mandelic Acid Enolate: Enantioselective Synthesis of Substituted (<i>R</i>)-3-Hydroxy-3-phenyloxindoles and (<i>R</i>)-Benzylic Acids and Synthesis of Nitrobenzophenones
作者:Santiago Barroso、Gonzalo Blay、Luz Cardona、Isabel Fernández、Begoña García、José R. Pedro
DOI:10.1021/jo0402069
日期:2004.10.1
leads directly to enantiomericallypure (R)-3-hydroxy-3-phenyloxindoles. On the other hand the basic hydrolysis of the dioxolanone moiety in all the arylation products (ortho and para) leads to enantiomericallypuresubstituted (R)-benzylic acids. The oxidative decarboxylation of these latter with oxygen as terminal oxidant in the presence of pivalaldehyde and the Co(III)-Me2opba complex as catalyst gives