Visible-light-induced reductive coupling of arylacetylenes with benzothiazole sulfones
Tetsuya Sengoku, Haruka Iwama, Takuma Shimotori, Keisuke Fujimoto, Toshiyasu Inuzuka, Koki Matsune, Hidemi Yoda
The Journal of Organic Chemistry 2023, 88, 12776-12782. (DOI: 10.1021/acs.joc.3c01554)

The reductive coupling of alkyl or benzylic benzothiazole sulfones with arylacetylenes are performed in the presence of Hantzsch esters and K₂CO₃ under visible-light irradiation. The utility of this protocol is expanded to α-deuterative coupling using a deuterated Hantzsch ester, furnishing the corresponding alkenes with high deuterium incorporation.