91843-70-8Relevant articles and documents
Purines. LXXII. Oxidation of N6-alkyladenines with m-chloroperoxybenzoic acid leading to N6-alkyladenine 1-oxides
Itaya, Taisuke,Ogawa, Kazuo,Takada, Yasutaka,Fujii, Tozo
, p. 967 - 971 (1996)
Oxidations of N6-methyladenine (8a) and N6-benzyladenine (8b) with m- chloroperoxybenzoic acid (mcpba) in methanol have been found to afford the N(1)-oxides 7a,b in 36% and 35% yields, respectively. The structure of 7b has been established by leading it to N6-methoxyadenine (10) through O- methylation, Dimroth rearrangement, and nonreductive debenzylation. On the other hand, N6,N6-dimethyladenine (16) afforded the N(3)-oxide 17 in 40% yield on treatment with Mcpba in methanol. On the basis of these findings, together with data accumulated for N-oxidations of adenine, N(x)- monosubstituted adenines, and 6-substituted purines, the formation of hydrogen bonding between the 6-amino Nh and the carbonyl oxygen of a peroxycarboxylic acid may account for regioselective N(1)and N(7)-oxidations of adenine and N(x)-monosubstituted adenines.