Syntheses of isodityrosine, dityrosine and related compounds by phenolic oxidation of tyrosine and phenylglycine derivatives using an electrochemical method
The phenolic oxidation of l-tyrosine derivatives by electrolysis and zinc reduction produced the coupling products leading to isodityrosine and dityrosine. The oxidation mode could be controlled by altering halogen substituents (Br or I) at two ortho positions of phenol groups. Additionally, this methodology was applied to 4-hydroxy-d-phenylglycine derivatives, providing the corresponding oxidative
Enantioselective synthesis of dityrosine and isodityrosine via asymmetric phase-transfer catalysis
作者:Barry Lygo
DOI:10.1016/s0040-4039(98)02616-1
日期:1999.2
Application of N-anthracenylmethyl cinchonidinium chloride quaternary ammonium phase-transfer catalysts to the enantio- and diastereoselective synthesis of dityrosine and isodityrosine is reported. Under liquid-liquid phase-transfer conditions the key α-amino acid substituents are introduced with high enantioselectivity (≥95%e.e.).
Formation and characterization of crosslinks, including Tyr–Trp species, on one electron oxidation of free Tyr and Trp residues by carbonate radical anion
作者:Juan David Figueroa、Ana María Zárate、Eduardo Fuentes-Lemus、Michael J. Davies、Camilo López-Alarcón
DOI:10.1039/d0ra04051g
日期:——
result in the formation of Tyr–Trp species, as well as dityrosine and ditryptophan crosslinks. Here we report a simple experimental procedure, employing CO3˙− generated photochemically by illumination of a Co(III) complex at 254 nm, that produces micromolar concentrations of Tyr–Trp crosslinks. Analysis by mass spectrometry of solutions containing only the individual amino acids, and the Co(III) complex