Synthesis of Dihydrofurans and Dihydropyrans with Unsaturated Side Chains Based on Ring Size-Selective Ring-Closing Metathesis
作者:Bernd Schmidt、Stefan Nave
DOI:10.1002/adsc.200600473
日期:2007.1.8
Enantiomerically pure 1,5-hexadiene-3,4-diol, derived from D-mannitol in a few steps, may serve as a starting material for enantiopure dihydropyrans and dihydrofurans bearing an unsaturated side chain which is amenable for further synthetic transformations. The synthesis relies on a ring size-selective ring-closing metathesis reaction of a triene. Most likely, a catalyst-directing effect of an allylic
A compound of formula (I) or stereoisomers or pharmaceutically acceptable salts thereof, and their preparation and use as pharmaceuticals
wherein R
1
, R
2
and R
3
are as defined herein.
Synthesis and evaluation of two series of 4′-aza-carbocyclic nucleosides as adenosine A2A receptor agonists
作者:David Beattie、Andrew Brearley、Zarin Brown、Steven J. Charlton、Brian Cox、Robin A. Fairhurst、John R. Fozard、Peter Gedeck、Paul Kirkham、Koremu Meja、Lana Nanson、James Neef、Helen Oakman、Gillian Spooner、Roger J. Taylor、Robert J. Turner、Ryan West、Hannah Woodward
DOI:10.1016/j.bmcl.2009.11.131
日期:2010.2
The synthesis of two series of 4′-aza-carbocyclic nucleosides are described in which the 4′-substituent is either a reversed amide, relative to the carboxamide of NECA, or an N-bonded heterocycle. Using established purine substitution patterns, potent and selective examples of agonists of the human adenosine A2A receptor have been identified from both series. The propionamides 14–18 and the 4-hydroxymethylpyrazole
Purine Derivatives for Use as Adenosin A-2A Receptor Agonists
申请人:Fairhurst Robin Alec
公开号:US20080200483A1
公开(公告)日:2008-08-21
Compounds of formula I
in free or salt form, wherein R
1
, R
2
and R
3
have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A
2A
receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.
A compound of formula (I) or stereoisomers or pharmaceutically acceptable salts thereof, and their preparation and use as pharmaceuticals
wherein R
1
, R
2
and R
3
are as defined herein.