778594-76-6Relevant articles and documents
Preparation of new N6,9-disubstituted 12-phenyl-adenines and corresponding 8-azaadenines. A feasibility study for application to solid-phase synthesis. I [1]
Biagi, Giuliana,Giorgi, Irene,Livi, Oreste,Pacchini, Federica,Scartoni, Valerio,Salerni, Oreste LeRoy
, p. 575 - 580 (2007/10/03)
A suitably substituted pyrimidine 1 was converted to a number of title compounds. Nucleophilic substitution involving the chlorine atoms in 1 by treatment with phenylmethanethiol yielded 2 or 3, depending on the reaction temperature. Treatment of 3 with an amine afforded 6-phenylmethanesulfanyl- N4-substituted-2-phenyl-pyrimidine-4,5-diamines 4-7. These pyrimidines were converted into 2-phenylpurines 8-11 and 2-phenyl-8-azapurines 12-14, by treatment with triethyl orthoformate in the presence of hydrochloric acid (or acetic anhydride), or with potassium nitrite and acetic acid respectively. The thioether function on C(6) was then converted into a sulfonyl group by oxidation with m-chloroperoxybenzoic acid affording purines 15-18 and their 8-azaanalogs 19-21; these compounds, as crude products, were treated with an amine to yield the corresponding adenines 22-25 or 8-azaadenines 26-31. All reactions were performed under conditions compatible with the possible use of a tniomethyl resin in place of phenylmethanethiol to bind the pyrimidine ring of 1 to a solid phase.