Pyrazolo[3,4-d]pyrimidines with adenosine-like binding affinities
申请人:Griffith University
公开号:US05227485A1
公开(公告)日:1993-07-13
The A21 receptor extracelluar site and the A2 receptor extracellular site of adenosine analogues are structurally different and that binding orientations of adenosine or adenosine analogues are different at these sites and this may be used to determine their structure. Novel pyrimidine compounds are described.
Reactions of 5-methyl-2H-1, 4-thiazin-3 (4H) -one (4) with various N-acylpyridinium salts (7a-g) led to (N-acyldihydropyridyl) thiazinones (5a-g), oxidation of which yielded a new class of pyridylthiazinones (6a-g). These reactions were applied to the synthesis of other azaarylthiazinones. Some of these azaarylthiazinones, particularly 6- (4-pyridyl) thiazinones (6a, 14a and 14b) showed positive inotropic activity with little chronotropic effect on guinea pig left atria.
1,4-thiazine derivative, and cardiotonic agent comprising it as
申请人:Zenyaku Kogyo Kabushiki Kaisha
公开号:US04800201A1
公开(公告)日:1989-01-24
A novel 1,4-thiazine derivative represented by the formula I, a pharmaceutically acceptable acid addition salt thereof, a process for preparation thereof and a cardiotonic agent comprising it as an effective component; ##STR1## wherein R.sub.1 and R.sub.2 represent respectively hydrogen atom, lower alkyl group, lower alkoxy group, amino group, lower alkyl-amino group, aryl-amino group, hydroxy group, aryl group or 5- or 6-membered heterocyclic residue; R.sub.3 and R.sub.4 represent hydrogen atom or lower alkyl group; and R.sub.5 represents N-containing heterocyclic residue and is not pyridinyl group when R.sub.1 and R.sub.2 represent hydrogen atom and R.sub.3 and R.sub.4 represent hydrogen atom or lower alkyl group.
Studies on Organophosphorus Compounds; LXIII. A New and Facile Synthetic Route to Protected Phosphonodipeptides: A Backbone for the Formation of Oligophosphonopeptides
作者:Chengye Yuan、Shoujun Chen
DOI:10.1055/s-1992-26319
日期:——
A modified three-component condensation of 2-haloalkanamides, benzaldehydes and dialkyl phosphites leading to α-(2-haloacylamino)-substituted dialkyl benzylphosphonates 1 is described. Compounds 1 upon reaction with phthalimide and potassium carbonate under phase transfer catalysis conditions afford protected phosphonodipeptides, which can be used as important intermediates for the synthesis of oligophosphonopeptides.
Capitalizing on the proven clinical efficacy of levetiracetam as an antiepileptic drug, a drug discovery program lead to the identification of a new generation of SV2Aligands with equal or better tolerability profiles than levetiracetam, and improvedpotencytowardseizuresuppression in animal models.