Incorporation of Phosphole Moieties into the Side Chain of Tyrosine and Phenylalanine
作者:Fabrice Bisaro、Pascal Le Floch
DOI:10.1055/s-0030-1259066
日期:2010.12
A tyrosine derivative with a phosphole moiety covalently attached to the phenolic hydroxy group was successfully prepared through P-O bond-forming reaction, via a nucleophilic substitution reaction at the phosphorus, by slow addition of N-CBz-protected tyrosine methyl ester to a chlorophosphole adduct in the presence of triethylamine, albeit with a low yield. Furthermore, a phenylalanine derivative with a phosphole-containing side chain was conveniently synthesized by Stille cross-coupling reaction of a stannylphosphole reagent with N-Boc-protected 4-iodophenylalanine methyl ester, using Pd(dba)2 as catalyst, in the absence of any additional ligand. These molecules must be seen as valuable building blocks for the preparation of metalloproteins of interest for chemical, biological, and medical applications.
通过P-O键形成反应,通过磷上的亲核取代反应,成功制备了一种酪氨酸衍生物,其中吡咯磷杂环己二烯部分与酚羟基通过共价键连接,尽管产率较低。此外,通过Stille交叉耦合反应,利用钯催化剂Pd(dba)2,在没有额外配体的情况下,方便地合成了含吡咯磷杂环己二烯侧链的苯丙氨酸衍生物,该反应涉及锡基吡咯磷杂环己二烯试剂与N-Boc保护的4-碘苯丙氨酸甲酯。这些分子必须被视为有价值的构建模块,用于制备化学、生物学和医学应用领域感兴趣的金属蛋白。