A series of homoannularly and heteroannularlysubstituted adamantyl ferrocene derivatives has been synthesized and their effects on membrane fluidity were investigated using liposomes as the membrane models. The liposome formulations of adamantyl ferrocene derivatives were characterized by using dynamic light scattering, differential scanning calorimetry and fluorescence anisotropy measurements. It
synthesis and conformational analysis of mono- and disubstituted ferrocene bioconjugates bearing dipeptide chains (Boc-AA-AA-Fn-X, AA=Gly, l-Ala, l-Val). The conformational preferences of novel aminoferrocene derived conjugates with X=H, as well as their 1-acetyl analogues (X=COMe), were investigated by spectroscopic techniques (IR, NMR and CD) and corroborated by DFT calculations. Chirally organized
study of Boc−(Aib)n-NH−Fc and Boc-l-Ala−(Aib)n-NH−Fc (n=1–3) derivatives revealed the transfer of a chiral information from the l-Ala amino acid through the highly organized (Aib)3 sequence to a ferrocene core, which is easily detectable in CD spectra near the absorption maximum of the ferrocene chromophore.
Boc-(Aib) n -NH-Fc 和 Boc- l -Ala-(Aib) n -NH-Fc ( n =1-3) 衍生物的实验和计算研究揭示了手性信息从l -Ala的转移氨基酸通过高度有组织的 (Aib) 3序列到达二茂铁核心,在二茂铁生色团吸收最大值附近的 CD 光谱中很容易检测到。
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.
Ferrocenyl-Labeled Sugar Amino Acids: Conformation and Properties
Novel organometallic sugar amino acid conjugates 1-5 have been prepared by amide coupling of O-protected N-acetylmuramic acid and iso-muramic acid (2-[3-amino-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxypropanoic acid) with 1-aminoferrocene, 1'-aminoferrocene-1'-carboxylic acid (H-Fca-OH), or 1,1'-diaminoferrocene, respectively. The influence of the ferrocenyl moiety and presence of additional remote potential hydrogen atom acceptors and donors at the ferrocenyl core on the conformation and lipophilicity is investigated by TLC, IR, NMR, and CD spectroscopic methods augmented by density functional calculations. Furthermore, the redox potential of the ferrocene/ferrocenium couple is tuned by the electron-withdrawing and -donating nature of the substituents at the ferrocenyl label.