Add time:09/01/2019         Source:sciencedirect.com

2-Amino-3-(purin-9-yl)propanoic acids substituted at position 6 of the purine base moiety by dimethylamino, cyclopropylamino, pyrrolidin-1-yl, hydroxy, and sulfanyl group as well as their 2-aminopurine analogues were prepared from corresponding 9-(2,2-diethoxyethyl)purines and 2-aminopurines, respectively, by the Strecker synthesis. 2-Aminopropanoic acid derivatives were tested for their immunostimulatory and immunomodulatory potency. Some of these compounds significantly enhanced secretion of chemokines RANTES and MIP-1α, the most potent was 2-amino-6-sulfanylpurine derivative. Most of these compounds also augmented NO biosynthesis triggered primarily by IFN-γ.

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