作者:Simon D. Nielsen、Garrick P. Smith、Mikael Begtrup、Jesper L. Kristensen
DOI:10.1016/j.tet.2011.05.039
日期:2011.7
a new fluorous-tagged ammonia-equivalent for the synthesis of N-alkylated amino acids is described. The required building blocks were readily accessed in high yield and purity using F-SPE purification technique. Coupling of the fluorous-tagged hydroxylamines with a selection of boronic acids and glyoxalic acid gave the desired N-alkylated amino acids. Subsequent removal of the fluorous tag via catalytic
描述了用于合成N-烷基化氨基酸的等价的带有氟标签的氨的发展。使用F-SPE纯化技术可以轻松获得所需的构建基块,且产率高且纯度高。含氟标签的羟胺与选择的硼酸和乙二酸的偶合得到所需的N-烷基化的氨基酸。随后研究了使用多种不同的催化剂和溶剂通过催化氢化除去氟标签的方法。一种更可靠的去标记程序涉及将氨基酸转化为相应的甲酯,然后进行Mo(CH 3 CN)3(CO)3介导的N–O键裂解。