Pyrazolyl derivatives as Syk inhibitors

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The Merck Sharp & Dohme Corp., , Merck Canada Inc. 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., , Merck Canada Inc.’s patent US 9242984 B2 deals with Pyrazolyl derivatives as Syk inhibitors.
The present invention provides new pyrazole derivatives of formula I are potent inhibitor of spleen tyrosine kinase, and is useful in the treatment and prevention of diseases mediated by said enzyme, such as asthma, COPD, rheumatoid arthritis, and cancer .

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