Total Synthesis of Micromide: a Marine Natural Product
作者:Jianrong Han、Jingtang Lian、Xia Tian、Shengwei Zhou、Xiaoli Zhen、Shouxin Liu
DOI:10.1002/ejoc.201402977
日期:2014.11
This paper describes an efficient procedure for the synthesis of micromide, a naturalproduct that shows anti-solid-tumor activity. Our strategy involved the synthesis of N-nosyl-protected amino acids and their N-methylation with iodomethane. The hindered oligopeptides containing N-methyl amino acids were synthesized in excellent yields and high purities.
Convenient Synthesis of <i>N</i>-Methylamino Acids Compatible with Fmoc Solid-Phase Peptide Synthesis
作者:Eric Biron、Horst Kessler
DOI:10.1021/jo050477z
日期:2005.6.1
Unfortunately, their synthesis is hampered by the high price and unavaibility of many Nα-methylamino acids. An efficient and practical preparation of Nα-methyl-Nα-(o-nitrobenzenesulfonyl)-α-amino acids without extensive purification is described. The procedure is based on the well-known N-alkylation of Nα-arylsulfonylamino esters which was improved by using dimethyl sulfate and DBU as base. Ester cleavage is