The present invention is directed to compounds of formula I-V and tautomers thereof or pharmaceutically acceptable salts, esters, and prodrugs thereof which are inhibitors of
syk kinase. The present invention is also directed to intermediates used in making such compounds, the preparation of such a compound, pharmaceutical compositions containing such a compound, methods of inhibition
syk kinase activity, methods ofinhibilion the
platelet aggregation, and methods to prevent or treat a number of conditions mediated at least in part by
syk kinase activity, such as cardiovascular
disease, inflammatory
disease and
autoimmune disease and
cell proliferative disorder. Formula (I) Y1 is selected from the group consisting of: (a) and (b); Z is O or S; D1 is selected from the group consisting of: (a) phenyl substituted with a group, R5 (b) naphthyl (c) C3-8cycloalkyl (d) heteroaryl (e) heterocyclyl.