Synthesis of acylated glycoconjugates as templates to investigate in vitro biopharmaceutical properties
摘要:
A series of novel glycopyranosyl azides were synthesised wherein the carbohydrate moiety was peracylated with four acetyl, propionyl, butanoyl, pentanoyl (valeryl) or 3-methylbutanoyl (isovaleryl) ester linked groups. A panel of glycoconjugates was synthesised from these glycopyranosyl azides using copper-catalysed azide-alkyne cycloaddition. The in vitro metabolic stability, plasma stability and plasma protein binding was then measured to establish the impact of the different acyl group when presented on a common scaffold. The acetyl, propionyl and butanoyl esters exhibited metabolism consistent with esterase processing, and various mono-, di- and tri-acylated hydrolysis products as well as the fully hydrolysed compound were detected. In contrast, the pentanoyl and 3-methylbutanoyl esters were stable. (c) 2012 Elsevier Ltd. All rights reserved.
Design, Synthesis, and Biological Evaluation of Novel Carbohydrate-Based Sulfamates as Carbonic Anhydrase Inhibitors
作者:Marie Lopez、Jonathan Trajkovic、Laurent F. Bornaghi、Alessio Innocenti、Daniela Vullo、Claudiu T. Supuran、Sally-Ann Poulsen
DOI:10.1021/jm101525j
日期:2011.3.10
Carbonic anhydrases (CAs) IX and XII are enzymes with newly validated potential for the development of personalized, first-in-class cancer chemotherapies. Here we present the design and synthesis of novel carbohydrate-based CA inhibitors, several of which were very efficient inhibitors (K-i < 10 nM) with good selectivity for cancer-associated CA isozymes over off-target CA isozymes. All inhibitors comprised a carbohydrate core with one hydroxyl group derivatized as a sulfamate. Five different carbohydrates were chosen to present a selection of molecular shapes with subtle stereochernical differences to the CA enzymes active site. Variable modifications of the remaining sugar hydroxyl groups were incorporated to provide an incremental coverage of chemical property parameters that are associated with biopharmaceutical performance. All sulfamate inhibitors displayed ligand efficiencies that are consistent with those reported for good drug lead candidates.
Indium(III) Triflate: A Highly Efficient Catalyst for Reactions of Sugars<sup>[1]</sup>
作者:Santosh Kumar Giri、Monika Verma、K. P. Ravindranathan Kartha
DOI:10.1080/07328300802458970
日期:2008.12.11
Indium(III) trifluoromethanesulfonate has been found to be extremely efficient in catalyzing acyl transfer reactions of various carbohydrates and their derivatives. Selective acetolyses of certain benzyl ethers/isopropylidene acetals of sugars have been possible using In(OTf)3 in Ac2O (neat). Reaction of the per-O-acetate of 2-deoxy-2-phthalimido-D-glucose with benzyl mercaptan in the presence of In(OTf)3
Synthesis of acylated glycoconjugates as templates to investigate in vitro biopharmaceutical properties
作者:Cindy J. Carroux、Janina Moeker、Josephine Motte、Marie Lopez、Laurent F. Bornaghi、Kasiram Katneni、Eileen Ryan、Julia Morizzi、David M. Shackleford、Susan A. Charman、Sally-Ann Poulsen
DOI:10.1016/j.bmcl.2012.11.056
日期:2013.1
A series of novel glycopyranosyl azides were synthesised wherein the carbohydrate moiety was peracylated with four acetyl, propionyl, butanoyl, pentanoyl (valeryl) or 3-methylbutanoyl (isovaleryl) ester linked groups. A panel of glycoconjugates was synthesised from these glycopyranosyl azides using copper-catalysed azide-alkyne cycloaddition. The in vitro metabolic stability, plasma stability and plasma protein binding was then measured to establish the impact of the different acyl group when presented on a common scaffold. The acetyl, propionyl and butanoyl esters exhibited metabolism consistent with esterase processing, and various mono-, di- and tri-acylated hydrolysis products as well as the fully hydrolysed compound were detected. In contrast, the pentanoyl and 3-methylbutanoyl esters were stable. (c) 2012 Elsevier Ltd. All rights reserved.