Purine compounds endowed with immunomodulating activity.

摘要

The invention relates to a series of purine derivatives of formula (I)
<Chemistry id="chema01" num="0001"><Image id="ia01" he="26" wi="49" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R is hydrogen or NH<Sub>2</Sub>, n is an integer from 1 to 6, R<Sup>1</Sup> is one of the following chains:
<Chemistry id="chema02" num="0002"><Image id="ia02" he="12" wi="28" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry><Chemistry id="chema03" num="0003"><Image id="ia03" he="15" wi="52" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry><Chemistry id="chema04" num="0004"><Image id="ia04" he="17" wi="37" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sup>2</Sup> is the residue of an aminoacid, R<Sup>3</Sup> is hydrogen or the residue of an oligopeptide and R<Sup>4</Sup> is OH or the residue of an oligopeptide.