Scheme 2.
Mechanochemical CuCl‐catalyzed coupling of commercially available arylsulfonamides 1 a–1 r with carbodiimides 2 a–2 c. [a] Used 10% CuCl. [b] Used 20% CuCl. Adapted with permission from Ref. [47a]. Copyright 2014, Wiley‐VCH.
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