There are provided according to the invention novel compounds of formula I
1
wherein R
1
, R
2
and R
3
are as described in the specification, processes for preparing them, formulations containing them and their use in therapy for the treatment of inflammatory diseases.
Efficient Synthesis of an Adenosine A2a Agonist: Glycosylation of 2-Haloadenines and an <i>N</i><sup>2</sup>-Alkyl-6-chloroguanine
作者:John M. Caddell、Alan M. Chapman、Bob E. Cooley、Brian P. Downey、Michael P. LeBlanc、Mary M. Jackson、Thomas M. O'Connell、Hahn-My Phung、Thomas D. Roper、Shiping Xie
DOI:10.1021/jo049963x
日期:2004.4.1
A convergent synthesis of adenosine A2a agonist 1 in the form of its maleate salt 2 was achieved. The key step in this approach was the highly selective 9beta-glycosylation reaction between 2-haloadenines or an N-2-alkyl-6-chloroguanine and a D-ribose derivative containing a 2-ethyltetrazolyl moiety. Glycosylations of other purine derivatives were also examined, and the methods developed provide efficient access to a variety of adenosine analogues such as 2-alkylaminoadenosines, an attractive class of compounds with antiinflammatory activity.