azathioprine analogs- 2-subsituted derivatives of 7-methyl-6-(l-methyl-4-nitroimidazol-5-ylthio)purines 5 has been achieved by the reaction of 2-subsituted 6-purinethiones 4 with 5-chloro-1-methyl-4-nitroimidazole in ethanol. In the case of 7-methyl-2,6-dithioxanthine 4j, reaction in DMF gave di(imidazolyl) product 51. The key step in this synthesis was preparation of the appropriate 2-substituted 6-purinones
In the title compound, C(9)H(13)N(4)O(2)(+) x I(-) x 0.5 H(2)O, the non-H atoms of the ionic components lie on a mirror plane in Cmca, with the O atom of the partial water molecule lying on a twofold rotation axis. Whereas one of the methoxy methyl groups is directed away from the adjacent N-methyl group, the other methoxy methyl group is directed towards its adjacent N-methyl group. The conformation of the methoxy methyl groups provides an explanation for the outcomes of intramolecular thermal rearrangements of 2,6-dialkoxy-7,9-dimethylpurinium salts.
Kowalska, A.; Maslankiewicz, A.; Chojnacki, H., Polish Journal of Chemistry, 1993, vol. 67, # 5, p. 857 - 868
作者:Kowalska, A.、Maslankiewicz, A.、Chojnacki, H.、Wisor, A. K.