Purines, pyrimidines, and imidazoles. Part XXVII. The synthesis of some derivatives and analogues of N-(5-amino-1-β-<scp>D</scp>-ribofuranosylimidazole-4-carbonyl)-<scp>L</scp>-aspartic acid 5′-phosphate (SAICAR) including a competitive enzyme (adenylosuccinate AMP-lyase no. 4.3.2.2.) inhibitor-N-(5-amino-1-β-<scp>D</scp>-ribofuranosylimidazole-4-carbonyl)-<scp>L</scp>-threo-β-methyl aspartic acid 5′-phosphate
作者:I. E. Burrows、G. Shaw、D. V. Wilson
DOI:10.1039/j39680000040
日期:——
zole-4-carbonyl)-L-aspartic acid 5′-phosphate (SAICAR) have been prepared by reaction of 5-amino-1-β-D-ribofuranosylimidazole-4-carboxylic acid with a number of α-amino-acids and dicyclohexylcarbodi-imide, and phosphorylation of the products. One of the derivatives of SAICAR namely N-(5-amino-1-β-D-ribofuranosylimidazole-4-carbonyl)-L-threo-β-methylaspartic acid 5′-phosphate was a competitive inhibitor
的几个类似物ñ - (5-氨基-1-β- d -ribofuranosylimidazole -4-羰基) -大号天冬氨酸5'-磷酸(SAICAR)已经制备通过5-氨基-1-β-的反应d -呋喃呋喃基氨基咪唑-4-羧酸与许多α-氨基酸和二环己基碳二亚胺,以及产物的磷酸化作用。一个SAICAR的衍生物即ñ - (5-氨基-1-β- d -ribofuranosylimidazole -4-羰基) -大号-苏-β-methylaspartic酸5'-磷酸是酶adenylosuccinase的竞争性抑制剂。讨论了酶催化SAICAR脱酰胺的机理。
Stereochemistry and Conformation of Skyllamycin, a Non-Ribosomally Synthesized Peptide from<i>Streptomyces</i>sp. Acta 2897
作者:Vivien Schubert、Florent Di Meo、Pierre-Loïc Saaidi、Stefan Bartoschek、Hans-Peter Fiedler、Patrick Trouillas、Roderich D. Süssmuth
DOI:10.1002/chem.201304562
日期:2014.4.22
Skyllamycin is a non‐ribosomally synthesized cyclic depsipeptide from Streptomyces sp. Acta2897 that inhibits PDGF‐signaling. The peptide scaffold contains an N‐terminal cinnamoyl moiety, a β‐methylation of aspartic acid, three β‐hydroxylated amino acids and one rarely occurring α‐hydroxy glycine. With the exception of α‐hydroxy glycine, the stereochemistry of the amino acids was assigned by comparison
Mapping the Aspartic Acid Binding Site of <i>Escherichia coli</i> Asparagine Synthetase B Using Substrate Analogs
作者:Ian B. Parr、Susan K. Boehlein、Anthony B. Dribben、Sheldon M. Schuster、Nigel G. J. Richards
DOI:10.1021/jm9601009
日期:1996.1.1
Novel inhibitors of asparagine synthetase, that will lower circulating levels of blood asparagine, have considerable potential in developing new protocols for the treatment of acute lymphoblastic leukemia. We now report the indirect characterization of the aspartate binding site of Escherichia coli asparagine synthetase B (AS-B) using a number of stereochemically, and conformationally, defined aspartic
Palladium-catalyzed construction of amino acid derivatives possessing vicinal chiral quaternary and tertiary carbon centers at the α and β positions
作者:Daiji Ikeda、Motoi Kawatsura、Junichi Uenishi
DOI:10.1016/j.tetlet.2005.07.139
日期:2005.9
The palladium catalyzed regio- and diastereo-selective allylicalkylation of (R)-2-acetoxy-4-aryl-3-butene with N-(diphenylmethylidene)glycinate and N-(diphenylmethylidene)alaninate occurred. The stereochemistry was controlled by the use of o-(diphenylphosphino)carboxylic acid, and produced new amino acid derivatives possessing vicinal chiral quaternary and tertiary carbon centers at the α and β positions
Continued investigation of the polar extracts of the marine spongeLatrunculia sp. has resulted in the discovery of callipeltins J–M. The new structures were determined by interpretation of their NMR and MS data. The stereochemistry of the unusual 3-methylglutamine residue in callipeltins J and K was secured by stereoselective synthesis and Marfey's LC–MS analysis.