1153949-15-5Relevant articles and documents
AN IMPROVED PROCESS FOR THE PREPARATION OF BARICITINIB
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Page/Page column 18, (2021/04/01)
The present invention provides an improved process for the preparation of Baricitinib of formula (I),
Discovery of Tyrosine Kinase 2 (TYK2) Inhibitor (PF-06826647) for the Treatment of Autoimmune Diseases
Gerstenberger, Brian S.,Ambler, Catherine,Arnold, Eric P.,Banker, Mary-Ellen,Brown, Matthew F.,Clark, James D.,Dermenci, Alpay,Dowty, Martin E.,Fensome, Andrew,Fish, Susan,Hayward, Matthew M.,Hegen, Martin,Hollingshead, Brett D.,Knafels, John D.,Lin, David W.,Lin, Tsung H.,Owen, Dafydd R.,Saiah, Eddine,Sharma, Raman,Vajdos, Felix F.,Xing, Li,Yang, Xiaojing,Yang, Xin,Wright, Stephen W.
supporting information, p. 13561 - 13577 (2021/01/01)
Tyrosine kinase 2 (TYK2) is a member of the JAK kinase family that regulates signal transduction downstream of receptors for the IL-23/IL-12 pathways and type I interferon family, where it pairs with JAK2 or JAK1, respectively. On the basis of human genetic and emerging clinical data, a selective TYK2 inhibitor provides an opportunity to treat autoimmune diseases delivering a potentially differentiated clinical profile compared to currently approved JAK inhibitors. The discovery of an ATP-competitive pyrazolopyrazinyl series of TYK2 inhibitors was accomplished through computational and structurally enabled design starting from a known kinase hinge binding motif. With understanding of PK/PD relationships, a target profile balancing TYK2 potency and selectivity over off-target JAK2 was established. Lead optimization involved modulating potency, selectivity, and ADME properties which led to the identification of the clinical candidate PF-06826647 (22).
PYRAZOLO[1,5-A]PYRAZIN-4-YL DERIVATIVES
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Paragraph 0264; 0265; 0266; 0267, (2017/09/08)
A compound compound having the structure: or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate of said compound or pharmaceutically acceptable salt, wherein A, A′ and A″ are independently O, C═O, C—R′ or N—R″, where R′ and R″ may independently be H, amino, —NR7COR6, COR6, —CONR7R8, C1-C6 alkyl, or hydroxy(C1-C6 alkyl), and R″ may be present or absent, and is present where the rules of valency permit, and where not more than one of A, A′ and A″ is O or C═O; R0 and R are independently H, Br, Cl, F, or C1-C6 alkyl; R1 is H, C1-C6 alkyl, or hydroxy(C1-C6 alkyl); R2 is selected from the group consisting of H, C1-C6 alkyl, C1-C6 alkoxy, hydroxy(C1-C6 alkyl), phenyl(C1-C6 alkyl), formyl, heteroaryl, heterocyclic, —COR6, —OCOR6, —COOR6, —NR7COR6, —CONR7R8, and —(CH2)n—W, where W is cyano, hydroxy, C3-C8 cycloalkyl, —SO2NR7R8, and —SO2—R9, where R9 is C1-C6 alkyl, C3-C8 cycloalkyl, heteroaryl, or heterocyclic; wherein each of said alkyl, cycloalkyl, heterocyclic, or heteroaryl may be unsubstituted or substituted by halo, cyano, hydroxy, or C1-C6 alkyl; X is C—R3 or N, where R3 may be H or C1-C6 alkyl; R4 and R5 are independently H, amino, C1-C6 alkyl, or hydroxy(C1-C6 alkyl); R6, R7 and R8 are each independently H, C1-C6 alkyl, C1-C4 alkoxy(C1-C6 alkyl), or C3-C8 cycloalkyl, said C1-C6 alkyl is optionally substituted by halo, CN or hydroxy; or, R7 and R8 together with the atom bonded thereto form a 5- or 6-membered ring, said ring being optionally substituted by halo, hydroxy, CN, or C1-C6 alkyl; and, n is 0, 1, 2 or 3. Also provided are methods of treatment as Janus Kinase inhibitors and pharmaceutical compositions containing the compounds of the invention and combinations thereof with other therapeutic agents.
