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。