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Preparation method of Derivatives of yantina as divisional Invention patent application Number 515.936 requested on 24 September 1982) (as divisional patent number 515.936)
Preparation method of Derivatives of yantina as divisional Invention patent application Number 515.936 requested on 24 September 1982) (as divisional patent number 515.936)
Process for the production of xanthine Derivatives of formula (i) in which R, R and R may be various radicals.Involves the reaction of a compound of formula (ii) in the presence of bases or in the form of its Salts, with an agent alcohilacion whose Chain alcohilica has 4 to 8 Carbon ATOMS, of formula (iii), in which one of R1, R2 and R3 is Hydrogen and the other two are alcohilo, R is Hydrogen or Methyl O, X Group is a nucleophile, and can be various radicals.These compounds have pharmacological applications for the treatment of Airway diseases obstructivasde.
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