Process for obtaining almost fluorescence-free xanthines

Details Process for obtaining almost fluorescence-free xanthines Process for obtaining almost fluorescence-free xanthines

1991-02-13

1992-09-01

Rizzo, Nicholas S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen bonded directly to ring carbon of the purine ring...

544267, C07D47304

Patent

active

051440334

ABSTRACT:
Process for obtaining almost fluorescence-free xanthines by precipitation of xanthines which still contain an unsubstituted nitrogen atom in the molecule from aqueous-alkaline solution by means of CO.sub.2.

REFERENCES:
Ullmanns, Encyklopadie der technischen Chemie, "Polyacryl-Verbindungen bis Quecksilber" pp. 578-579 (1980).

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