Synthesis of Novel Se-Substituted Selenocysteine Derivatives as Potential Kidney Selective Prodrugs of Biologically Active Selenol Compounds: Evaluation of Kinetics of β-Elimination Reactions in Rat Renal Cytosol
作者:Ioanna Andreadou、Wiro M. P. B. Menge、Jan N. M. Commandeur、Eduard A. Worthington、Nico P. E. Vermeulen
DOI:10.1021/jm950750x
日期:1996.1.1
Eighteen Se-substituted selenocysteine derivatives were synthesized as potential kidney selective prodrugs which can be activated by renal cysteine conjugate beta-lyase to selenium-containing chemoprotectants or antitumor agents. Selenocysteine derivatives with aliphatic and benzylic Se-substituents were synthesized by reducing selenocystine to selenocysteine followed by a reaction with the corresponding
accessible aromatic thiols. We demonstrate that nearly 50 ncAAs with a diverse array of structures can be biosynthesized from these simple small‐molecule precursors by hijacking the cysteine biosynthetic enzymes, and the resulting ncAAs can subsequently be incorporated into proteins via an expanded genetic code. Moreover, we demonstrate that bioorthogonal reactive groups such as aromatic azides and
Facile Chemoselective Synthesis of Dehydroalanine-Containing Peptides
作者:Nicole M. Okeley、Yantao Zhu、Wilfred A. van der Donk
DOI:10.1021/ol006485d
日期:2000.11.1
for the synthesis of dehydroalanineresidues (II) within peptides. The unnatural amino acid (Se)-phenylselenocysteine (I) can be incorporated into growing peptidechains via standard peptide synthesis procedures. Subsequent oxidative elimination affords a dehydroalanine at the desired position. The oxidation conditions are mild and tolerate functionalities commonly found in peptides, including variously
Novel compounds having antimicrobial activitiy, in particular against Pseudomonas aeruginosa, Burkholderia cepaciaand/or Clostridium difficile, and a pharmaceutical composition containing the novel compound.
Total Synthesis and Stereochemical Assignment of Baringolin
作者:Xavier Just-Baringo、Paolo Bruno、Lars K. Ottesen、Librada M. Cañedo、Fernando Albericio、Mercedes Álvarez
DOI:10.1002/anie.201302372
日期:2013.7.22
The thiopeptide antibiotic baringolin has been synthesized, and its structure and stereochemistry have been confirmed. The use of a strategy based on palladium‐catalyzed cross‐couplings permitted a modular construction of this natural product.