Synthesis and structural characterization of metallated bioconjugates: C-terminal labeling of amino acids with aminoferrocene
作者:Jorge L. Jios、Srećko I. Kirin、Norma N. Buceta、Thomas Weyhermüller、Carlos O. Della Védova、Nils Metzler-Nolte
DOI:10.1016/j.jorganchem.2007.06.044
日期:2007.9
Aminoferrocene, H2N–Fc, has been substituted to the C-terminus of six aminoacids using the HBTU/HOBt coupling protocol. The synthesized bioconjugates Boc-Aaa-NH-Fc, Aaa = Gly (1), Leu (2), Phe (3), Val (4), Cys(Acm) (5), Tyr(tBu) (6) (Acm = acetamidomethyl, tBu = tert-butyl), have been characterized by 1H NMR, 13C NMR, EI-MS, EI-HRMS, UV and CD spectroscopies. In addition, a VT NMR study on 4 and
氨基二茂铁H 2 N–Fc已使用HBTU / HOBt偶联方案取代了六个氨基酸的C末端。合成的生物共轭物Boc-Aaa-NH-Fc,Aaa = Gly(1),Leu(2),Phe(3),Val(4),Cys(Acm)(5),Tyr(t Bu)(6)(通过1 H NMR,13 C NMR,EI-MS,EI-HRMS,UV和CD光谱对Acm =乙酰氨基甲基,t Bu = 叔丁基)进行了表征。此外,在一个VT NMR研究4和X射线结构1被呈现。
Spectroscopic and Theoretical Study of Asymmetric 1,1′-Diaminoferrocene Conjugates of α-Amino Acids
The synthesis and characterization of asymmetric 1,1'-diaminoferrocene conjugates of alpha-amino acids Boe-AA-NH-Fn-NH-Ac [AA = Gly (10), Ala (11), D-Ala (12), Val (13), Fn = 1,1'-ferrocenediyl] is reported. The conformational preferences of these organometallic peptidomimetics in solution are determined experimentally by circular dichroism spectroscopy, IR spectroscopy, and NMR spectroscopy and corroborated theoretically by DFT calculations.