Table 2. Decarboxylative Synthesis of Sulfinamides 1a.

Reaction conditions: (i) carboxylic acid (0.2 mmol), R-NSO (0.3 mmol), PC2 (10 mol %), 395–405 nm LEDs, CH2Cl2 (4 mL), rt, and 18 h. Isolated yields.
Carboxylic acid (0.3 mmol), Tr-NSO (0.2 mmol).
CH2Cl2 (1 mL).
Using PC1.
PC2 (20 mol %).
Using t-Oct-NSO in place of Tr-NSO.
Using (i-Pr)3Si-NSO (0.2 mmol) in place of Tr-NSO, carboxylic acid (0.3 mmol).
Using t-BuO-NSO (0.2 mmol) in place of Tr-NSO, carboxylic acid (0.3 mmol).