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All in it together: A highly efficient and extremely versatile method for the assembly of benzothiazoles with a nitrogen substituent in the 2‐position relies on a copper‐catalyzed cascade reaction of a 2‐haloaniline, carbon disulfide, and an N nucleophile (see scheme). The products are useful precursors for the synthesis of a range of important pharmaceutical agents. DMF=N,N‐dimethylformamide; R,R′=H,...
Copper-catalyzed amination of N-heterocycle derived aryl iodides followed by intramolecular condensative cyclization afforded N-substituted pyrrolo[2,1-c][1,4]-benzodiazepine-5,11-diones with good yields. By varying primary amines and substituents at aromatic ring of aryl iodides, a wide range of these heterocycles were assembled.
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