A General Route to 3-Thiosubstituted Steroids via Copper-Catalyzed C-S Coupling

A convenient and efficient approach to 3-thiosubstituted androstanes has been developed. The formation of a C(sp 2)-S bond was achieved through the Cu-catalyzed coupling of steroidal iododienes with a variety of S-nucleophiles, such as (het)aryl thiols and dithiocarbamates. A simple catalytic system comprising CuI without auxiliary ligands enabled the preparation of a library of target compounds in good to high yields. A moderate inhibitory activity against hormone-dependent cancer cell lines was demonstrated for representative 3-thiolated steroids. © 2025. Thieme. All rights reserved.