Abstract
Treatment of 9-alkyladenines (Ia, b, c) with 30% aqueous hydrogen peroxide in acetic acid at 30° produced the corresponding 9-alkyladenine 1-oxides (II a, b, c) in 51-71% yield. The 1-N-oxides were found to undergo alkylation almost exclusively at the oxygen atoms of the N-oxide groups when treated separately with methyl iodide, ethyl iodide, and benzyl bromide in N, N-dimethylacetamide at room temperature, and the corresponding salts (III) of all the nine possible 1-alkoxy-9-alkyladenines were obtained in excellent yields. 1-Ethoxyadenosine hydriodide and 1-benzyloxyadenosine perchlorate were also prepared from adenosine 1-oxide (II d) in a similar way. The ultraviolet and nuclear magnetic resonance spectral data on the 1-alkoxyadenine derivatives obtained in the previous and present studies are collected in Tables II and III.
