Cyclopeptide Alkaloids: Stereochemistry and Synthesis of the Precursors of Discarines C and D and Myrianthine A
作者:Marco A. Mostardeiro、Vinicius Ilha、Janice Dahmer、Miguel S. B. Caro、Ionara I. Dalcol、Ubiratan F. da Silva、Ademir F. Morel
DOI:10.1021/np400313w
日期:2013.7.26
The stereochemistry of discarines C (1) and D (2) and myrianthine A (3), three cyclopeptidealkaloids isolated from Discaria febrifuga, was determined by a combination of NMR studies of 1–3, enantioselective gas chromatography, and comparison of NMR data with those of synthetic tripeptides. For the synthesis of peptides, the nonproteinogenic amino acid 3-phenylserine was also obtained in its four diastereoisomeric