"Here we describe a photoredox-enabled functionalized carbon-atom insertion reaction into #indene. We disclose the utilization of a radical #carbyne precursor that facilitates the insertion of carbon atoms bearing a variety of functional groups, including #trifluoromethyl, #ester, phosphate ester, sulfonate ester, sulfone, nitrile, #amide, aryl ketone and aliphatic #ketone fragments to access a library of 2-substituted #naphthalenes"

https://www.nature.com/articles/s41929-023-01089-x