3-Methyl-7-(
1,1-dioxothietan-3-yl)-8-cyclohexylamino-
1-ethyl-
1H-purine-2,6(3H,7H
Alkylation of dimethyl 2-bromo-
1H-imidazole-4,5-dicarboxylate with 2-chloromethylthiirane gave
1-Alkyl-8-bromo-3-methyl-7-(
1,1-dioxo-
1λ6-thietan-3-yl)-3,7-dihydro-
1H-purine-2,6-diones reacted