A facile and general synthesis of 2,4‐Di‐ and 2,4,7‐trisubstituted thieno[2,3‐c]pyridines
摘要:
Abstractmagnified imageTreatment of 3,5‐dibromo‐ or 3,5‐dichloro‐pyridine‐4‐carboxaldehyde 2 with one equivalent of methyl thioglycolate, followed by exposure to base, provided 4‐bromo‐ or 4‐chloro‐thieno[2,3‐c]pyridine‐2‐carboxylate 4 in good yields. Oxidation of the thieno[2,3‐c]pyridine scaffold such as 7 with mCPBA, followed by treatment with POBr3, introduced a bromine exclusively at the 7‐position of the heterocycle. The 4‐ or 7‐bromide of the thienopyridines readily underwent Suzuki, Stille coupling, and Buchwald amination reactions, to afford 4‐ or 7‐substituted analogs 6 or 11. The 2‐carboxylate of 4b or 12 was smoothly removed through saponification and decarboxylation to furnish 15 or 16. Deprotonation of the thienopyridine at C‐2 position, followed by trapping with trimethyltin chloride, afforded a 2‐stannyl analog, which was readily converted to other C‐2 derivatives via Stille reaction.
Compounds having Formula I
are useful for treating inflammation. Also disclosed are pharmaceutical compositions comprising compounds of Formula I, and methods of inhibiting/treating inflammatory diseases in a mammal.
The invention relates to thiazole compounds of Formula I and Formula II and compositions thereof useful for treating diseases mediated by protein kinase B (PKB) where the variables have the definitions provided herein.
The invention also relates to the therapeutic use of such thiazole compounds and compositions thereof in treating disease states associated with abnormal cell growth, cancer, inflammation, and metabolic disorders.
Compounds of Formula 1, as shown below and defined herein:
pharmaceutically acceptable salts thereof, synthesis, intermediates, formulations, and methods of disease treatment therewith, including treatment of cancers, such as tumors driven at least in part by TAK1 or for which an appropriate TAK1 inhibitor is effective. This Abstract is not limiting of the invention.