A General and Facile Synthetic Approach to <i>N</i>
<sup>α</sup>-Boc Ureidoalanine Derivatives
作者:Xianming Hu、Hanbing Teng、Yunjiao He、Lamei Wu、Jiangtao Su、Xichun Feng、Guofu Qiu、Shucai Liang
DOI:10.1055/s-2006-939044
日期:——
We report a new and facile synthetic approach to N α -Boc ureidoalanine derivatives from commercially available Boc-L-aspartic acid. Not only N'-substituted but also N',N'-disubstituted ureidoalanine derivatives may be obtained by this method. The key aspect of this method is the employment of a 5-oxazolidinone to provide proper protection of the α-nitrogen of L-aspartic acid. This ensures successful
我们报告了一种从市售 Boc-L-天冬氨酸中合成 N α-Boc 脲基丙氨酸衍生物的新方法。通过该方法不仅可以得到N'-取代的而且还可以得到N',N'-二取代的脲基丙氨酸衍生物。该方法的关键方面是使用 5-恶唑烷酮为 L-天冬氨酸的 α-氮提供适当保护。这确保通过 Curtius 重排成功获得相应的异氰酸酯。