Chemical process

Details Chemical process Chemical process

C - Chemistry, Metallurgy

07

D

C07D 471/04 (2006.01)

Patent

CA 2086647

ABSTRACT CHAMICAL PROCESS The invention provides a novel chemical process for the manufacture of certain imidazo[4,5-b]pyridine derivatives of the formula I wherein R1,R2, R3 and R4 have the various meanings defined herein, and their non-toxic salts, which are angiotensin II inhibitors. The process involves the removal of an electron-deficient phenyl group or a pyridyl or pyrimidyl group from a compound of the formula II as defined herein. Certain of the intermediates are novel and are provided as a further feature of the invention.

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