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A ZnCl2‐promoted one‐pot synthesis of multisubstituted thiazolo[4,5‐b]pyridines and thieno[2,3‐b:4,5‐b′]dipyridines from mercaptonitrile salts, α‐bromo ketones and ketones has been developed. This approach involves a tandem SN2 alkylation/Thorpe–Ziegler cyclization/Friedländer reaction, which allows the creation of two hetero rings and four new bonds in a single operation. The reaction proceeds smoothly...