The (±)-1-(4-Methoxyphenyl)ethyl ester as a carboxyl protecting group
作者:Michael S. Bernatowicz、Hann-Guang Chao、Gary R. Matsueda
DOI:10.1016/0040-4039(94)88310-6
日期:1994.3
their (±)-1-(4-methoxyphenyl)ethyl (Mpe) esters in good yields by condensation with (±)-1-(4-methoxyphenyl)ethanol under mild conditions. The Mpe esters were rapidly and quantitatively cleavable by either 1% TFA in CH2Cl2 or 10% DCA in CH2Cl2, conditions which leave Boc, t-butyl ester and ether intact. An Mpe ester was removed by hydrogenolysis much more slowly than the analogous benzyl ester.