Synthesis of individual glutamate-containing phosphonamidothionate stereoisomers
作者:Haiyan Lu、Ying Hu、Cindy J Choy、Jeremy P Mallari、Alina F Villanueva、Annamarie F Arrozal、Clifford E Berkman
DOI:10.1016/s0040-4039(01)00746-8
日期:2001.6
acquisition of the individual stereoisomers of chiral phosphonothioic acids is anticipated to reveal the significance of phosphorus stereochemistry upon the inhibition of metallocarboxypeptidases as well as their utility as chiral and stereoselective inhibitory probes. Two methods for preparing individual glutamate-containing phosphonamidothioic acid diastereomers have been identified. One method achieves the
Stereoselective inhibition of glutamate carboxypeptidase by organophosphorus derivatives of glutamic acid
作者:Jeremy P. Mallari、Cindy J. Choy、Ying Hu、Alicia R. Martinez、Mia Hosaka、Yoko Toriyabe、Jack Maung、Joseph E. Blecha、Stephen F. Pavkovic、Clifford E. Berkman
DOI:10.1016/j.bmc.2004.08.016
日期:2004.11
stereoselective inhibition consistent with the configuration of the chiral phosphorus center, this effect was generally not remarkable. More important, was the effect of carbon stereochemistry upon glutamate carboxypeptidaseinhibition as exemplified by a limited series of enantiomeric pairs of phosphonamidate and phosphonamidodithionate derivatives of glutamic acid. The phosphonamidate analogs derived
The importance of the amide bond nearest the thiol group in enzymatic reactions of coenzyme A
作者:Jin Xun、Haidong Huang、Kurt W. Vogel、Dale G. Drueckhammer
DOI:10.1016/j.bioorg.2004.10.002
日期:2005.4
Analogues of coenzyme A (CoA) and of CoA thioesters have been prepared in which the amide bond nearest the thiol group has been modified. An analogue of acetyl-CoA in which this amide bond is replaced with an ester linkage was a good substrate for the enzymes carnitine acetyltransferase, chloramphenicol acetyltransferase, and citrate synthase, with K(m) values 2- to 8-fold higher than those of acetyl-CoA
Sugar-modified nucleosides are prime synthetic targets in anticancer and antiviral drug development. Radical mediated thiol–ene coupling was applied for the first time on nucleoside enofuranoside derivatives to produce a broad range of thio-substituted D-ribo, -arabino, -xylo and L-lyxo configured pyrimidine nucleosides. In contrast to the analogous reactions of simple sugar exomethylenes, surprisingly
Stereoselective Thioconjugation by Photoinduced Thiol‐ene Coupling Reactions of Hexo‐ and Pentopyranosyl
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‐ and
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‐Glycals at Low‐Temperature—Reactivity and Stereoselectivity Study
A comprehensive optimization and mechanistic study on the photoinduced hydrothiolation of different d- and l- hexo- and pentoglycals with various thiols was performed, at the temperature range of RT to -120 °C. Addition of thiols onto 2-substituted hexoglycals proceeded with complete 1,2-cis-α-stereoselectivity in all cases. Hydrothiolation of 2-substituted pentoglycals resulted in mixtures of 1,2-cis-α-