Clay‐Mediated Selective Hydrolysis of 5′‐<i>O</i>‐Acetyl‐2′,3′‐isopropylidene/Cyclohexylidene Nucleosides
作者:Mukund K. Gurjar、Dhananjoy Mondal、S. V. Ravindranadh、Mukund S. Chorghade
DOI:10.1080/00397910600639968
日期:2006.8
Abstract A generalized procedure for the selective hydrolysis of 5′‐O‐acetyl‐2′,3′‐isopropylidene/cyclohexylidene nucleosides with a solid catalyst, Montmorillonite K‐10 in refluxing methanol, to furnish 5′‐O‐acetyl‐nucleosides is described.
Simple method for fast deprotection of nucleosides by triethylamine-catalyzed methanolysis of acetates in aqueous medium
作者:Lidiane Meier、Gustavo C. Monteiro、Rodrigo A. M. Baldissera、Marcus Mandolesi Sá
DOI:10.1590/s0103-50532010000500013
日期:——
A straightforward methodology for deacetylation of protected ribonucleosides was developed based on triethylamine-catalyzed solvolysis in aqueous methanol. Reactions are completed in a few minutes under microwave irradiation and the free nucleosides are obtained in high yield after simple evaporation of volatiles. Other important features include the involvement of readily available reagents and the compatibility with diverse functional groups, which make this process very attractive for broad application.
Ishido, Yoshiharu; Sakairi, Nobuo; Okazaki, Kei, Journal of the Chemical Society. Perkin transactions I, 1980, p. 563 - 573
Lipase-catalyzed protection of the hydroxy groups of the nucleosides inosine and 2′-deoxyinosine: A new chemoenzymatic synthesis of the antiviral drug 2′,3′-dideoxyinosine
The selective acylation of the hydroxy groups of the nucleosides inosine la and 2'-deoxyinosine Ib has been achieved in the presence of Candida antarctica and Pseudomonas sp. lipases in organic solvents; starting from the 5'-acetyl derivative of 2'-deoxyinosine, compound 5a, an efficient chemoenzymatic synthesis of the antiviral drug 2',3'-dideoxyinosine 1c has been achieved, (C) 1999 Elsevier Science Ltd. All rights reserved.