Synthesis of Unnatural Amino Acids Functionalized with Sterically Shielded Pyrroline Nitroxides
作者:Ying Wang、Joseph T. Paletta、Kathleen Berg、Erin Reinhart、Suchada Rajca、Andrzej Rajca
DOI:10.1021/ol502449r
日期:2014.10.17
A series of unnatural amino acids functionalized with sterically shielded pyrroline nitroxides were synthesized. Their reduction by ascorbate/glutathione indicates that l-cysteine functionalized with gem-diethylpyrroline nitroxide is reduced at the slowest rate and is comparable to that measured for the most resistant to reduction pyrroline and pyrrolidine nitroxides.
Synthesis and Reduction Kinetics of Sterically Shielded Pyrrolidine Nitroxides
作者:Joseph T. Paletta、Maren Pink、Bridget Foley、Suchada Rajca、Andrzej Rajca
DOI:10.1021/ol302506f
日期:2012.10.19
A series of sterically shielded pyrrolidine nitroxides were synthesized, and their reduction by ascorbate (vitamin C) indicate that nitroxide 3, a tetraethyl derivative of 3-carboxy-PROXYL, is reduced at the slowest rate among known nitroxides, i.e., at a 60-fold slower rate than that for 3-carboxy-PROXYL.
[EN] FLUORINE-CONTAINING COMPOUND AND CONTRAST AGENT<br/>[FR] COMPOSÉ CONTENANT DU FLUOR ET AGENT DE CONTRASTE<br/>[JA] 含フッ素化合物および造影剤