Thiolate-Initiated Synthesis of Dibenzothiophenes from 2,2 '-Bis(methylthio)-1,1 '-Biaryl Derivatives through Cleavage of Two Carbon-Sulfur Bonds

摘要

A catalytic reaction involving the cleavage of two carbon-sulfur bonds in 2,2 '-bis(methylthio)-1,1 '-biaryl derivatives is reported. This reaction does not require a transition-metal catalyst and is promoted by a thiolate anion. Notably, based on DFT calculations, the product-forming cyclization step is shown to proceed through a concerted nucleophilic aromatic substitution (CSNAr) mechanism.