A highly efficient, cheap, and organic alternative to the commonly used iridium photosensitizer (Ir[dF(CF 3)ppy] 2 (dtbpy))PF 6 ([Ir−F]) is presented for visible-light energy transfer catalysis. The organic dye 2CzPN surpasses [Ir−F] in selectivity while at the same time being easily accessible in one step. The catalyst is recyclable and, due to its uncharged nature, soluble in nonpolar solvents such as toluene. Furthermore, the scope of molecular scaffolds that are compatible substrates for visible-light catalyzed dearomative cycloadditions is expanded.

A broadly applicable method for the trifluoromethylthiolation of methylene C(sp 3 )−H, methine C(sp 3 )−H, αoxygen C(sp 3 )−H, and formyl C(sp 2 )−H bonds is presented using the decatungstate anion as the sole catalyst. By adjusting the substrate ratio and reaction concentration, this method was applied to 40 examples in good regioselectivities, including the derivatization of natural products. Furthermore, SCF 3 −drug analogues were synthesized by subsequent functionalization of the SCF 3 products, highlighting the importance of this photocatalyzed C−H functionalization.

The synthesis of P-chiral compounds is challenging, especially since useful catalytic methods for preparing such molecules are scarce. Herein we disclose a desymmetrization that employs phosphinic acids as prochiral nucleophiles in a Pd-catalyzed asymmetric allylic alkylation reaction, furnishing phosphinates with high enantio- and diastereoselectivity. This new method has broad scope and is applied to the synthesis of an enantioenriched tertiary phosphine oxide.

A highly efficient, cheap, and organic alternative to the commonly used iridium photosensitizer (Ir[dF(CF 3)ppy] 2 (dtbpy))PF 6 ([Ir−F]) is presented for visible-light energy transfer catalysis. The organic dye 2CzPN surpasses [Ir−F] in selectivity while at the same time being easily accessible in one step. The catalyst is recyclable and, due to its uncharged nature, soluble in nonpolar solvents such as toluene. Furthermore, the scope of molecular scaffolds that are compatible substrates for visible-light catalyzed dearomative cycloadditions is expanded.

The syntheses of two novel, organic, and chiral photocatalysts are presented. By combining donor−acceptor cyanoarene-based photocatalysts with a chiral phosphoric acid, bifunctional catalysts have been designed. In preliminary proof-ofconcept reactions, their use in both enantioselective energy transfer and photoredox catalysis is demonstrated.