Table 2. Scope of N-Tosylhydrazones for Thiocarboxylation^a.

^aReaction conditions: unless otherwise noted, all reactions were carried out with 1 (0.2 mmol), 2a (0.3 mmol), Cs₂CO₃ (0.6 mmol), [Ir(dFCF₃ppy)₂dtbbpy]PF₆ (1 mol %), and 3 atm of CO₂ in 2 mL of DMSO, irradiation with blue LED (455 nm) at 25 °C for 24 h, and isolated yields were shown.

^b6 mmol scale, CO₂ was bubbled into the reaction continuously.

^cReaction was conducted at 0 °C in DMF (2 mL)