Monatshefte fur Chemie p. 341 - 352 (1985)
Update date:2022-08-11
Topics:
Kowalska, Alicja
Maslankiewicz, Andrzej
Syrek, Barbara
Cieplinski, Piotr
The preparation of unsymmetrical 2,6-dialkoxy-7-methylpurines (2), and 2-alkoxy-1,7-dialkyl-6-oxo-1,6-dihydropurines (5) is described.In contrast to 1 and 2, a facile thermal lactim-lactam rearrangement from hypoxanthines 5 and 7 into xanthines 6 was observed. - Keywords: Nucleophilic heteroaromatic substitution; thermal lactim-lactam rearrangement; Sigmatropic shifts; Dialkoxy-7H-purines; Dialkyl-1H(or 3H),7H-hypoxanthines; Trialkyl-7H-xanthines
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