Synthesis of (9<i>R</i>,12<i>S</i>)- and (9<i>S</i>,12<i>S</i>)-Cycloisodityrosine and Their <i>N</i>-Methyl Derivatives
作者:Dale L. Boger、Jiacheng Zhou、Robert M. Borzilleri、Seiji Nukui、Steven L. Castle
DOI:10.1021/jo961346o
日期:1997.4.1
Full details of the synthesis of (9R,12S)- and (9S,12S)-cycloisodityrosine and their N-methylderivatives are detailed based on an intramolecular nucleophilic aromatic substitution reaction for formation of the key biaryl ether with 14-membered ring macrocyclization. Their comparison with prior samples and the documentation of a facile C9 epimerization within the natural 9S series are described.