A copper-catalyzed reaction between 2-bromo-benzothioamides and S or Se involving sulfur rearrangement is reported, enabling access to benzodithioles and benzothiaselenoles in the presence of CsCO. In the absence of S or Se, the reaction affords dibenzodithiocines via two consecutive C(sp)-S Ullmann couplings.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7343286 | PMC |
| http://dx.doi.org/10.1021/acs.orglett.0c00907 | DOI Listing |
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