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A number of acyclic nucleosides have been prepared. 5-substituted-6-azauracils were persilylated with HMDS and then alkylated with aliphatic side chains e.g., (2-acetoxyethoxy)methyl bromide, 1,3-dibenzuloxy-2-chloromethoxypropane, (1-benzyloxy-3-phthalimido-2-propoxy)methyl chloride, and 1-benzyloxy-2-chloro-methoxybutane to yield protected acyclic nucleosides which were deprotected by Lewis acid or palladium to give various 6-azauracil acyclonucleosides.
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