An organocatalyzed enantioselective protonation sequence that starts from readily available disubstituted Meldrum's acid derivatives and phenols, proceeds under phase‐transfer‐catalytic (PTC) conditions, and provides chiral nonracemic 2‐aryl propionic esters in good isolated yields with up to 70 % ee is presented. The usefulness of this method was demonstrated by the synthesis of enantioenriched (S)‐ibuprofen
PINHEY J. T.; ROWE B. A., TETRAHEDRON LETT., 1980, 21, NO 10, 965-968
作者:PINHEY J. T.、 ROWE B. A.
DOI:——
日期:——
KOPINSKI, R. P.;PINHEY, J. T.;ROWE, B. A., AUSTRAL. J. CHEM., 1984, 37, N 6, 1245-1254
作者:KOPINSKI, R. P.、PINHEY, J. T.、ROWE, B. A.
DOI:——
日期:——
Kopinski, Richard P.; Pinhey, John T.; Rowe, Bruce A., Australian Journal of Chemistry, 1984, vol. 37, # 6, p. 1245 - 1254
作者:Kopinski, Richard P.、Pinhey, John T.、Rowe, Bruce A.
DOI:——
日期:——
The α-arylation of derivatives of malonic acid with aryllead triacetates. New syntheses of ibuprofen and phenobarbital.
作者:John T. Pinhey、Bruce A. Rowe
DOI:10.1016/s0040-4039(00)77752-5
日期:1980.1
Derivatives of Meldrum's acid and the sodium salts of substituted malonic esters undergo rapid arylation in high yield when treated with aryllead triacetates. These reactions have been applied to the synthesis of ibuprofen, an analgesic, and in a closely related reaction 5-ethylbarbituric acid has been reacted with phenyllead triacetate to give phenobarbital.