Substituted diazine and triazine spleen tyrosine kinease (Syk) inhibitors

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The Merck Sharp & Dohme Corp. patent solves the following problem:

Spleen Tyrosine Kinase (SYK) is a protein tyrosine kinase described as a key mediator of immunoreceptor signaling a host of inflammatory cells including mast cells, B-cells, macrophages and neutrophils. These immunoreceptors, including Fc receptor and the B-cell receptor, is important for allergic diseases, and antibody-mediated autoimmune diseases and thus pharmacologically interfering SYK conceivably treat these diseases.

Our analysis of this patent is as follows:

Merck Sharp & Dohme Corp.’s patent US 9416111 B2 deals with Substituted diazine and triazine spleen tyrosine kinease (Syk) inhibitors.
invention provides certain substituted diazine and triazine compounds of Formula (I) (I) or pharmaceutically acceptable salts thereof, wherein R1, R2, P3, R4, rcy, CY, and t as described here. invention also provides pharmaceutical compositions comprising such compounds, and methods of using the compounds for treating diseases or conditions mediated spleen tyrosine kinase (SYK) kinase.

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