As-Triazine Derivatives with Potential Therapeutic Action XXVII. Synthesis of 5-[Alkyl-(ethoxycarbonyl)methyl]mercapto-6-azauridines
作者:Francisc Czobor、Carol Cristescu
DOI:10.1080/15257779908041517
日期:1999.4
5-Mercapto-6-azauracil (I) reacted in aqueous medium with ethyl alpha-haloalkanoates giving 5-[alkyl-(ethoxycarbonyl)methyl]mercapto (II). Their 2,4-bis(trimethylsilyloxy) derivatives (III) were condensed with 1-O-acetyl-2,3,5-tri-O-benzoyl-D-ribofuranose in the presence of anhydrous stannic chloride to afford the corresponding blocked nucleosides (IV). Under the action of sodium methoxide, the derivatives IV were debenzoylated with the formation of the title compounds (V).