Fig. 2: The scope of carboxylic acids.
From: Site-specific Umpolung amidation of carboxylic acids via triplet synergistic catalysis
Standard conditions: carboxylic acids 1 (0.2 mmol), 2a (1.2 equiv), PC-I (1 mol%), P-A (30 mol%), FeI2 (15 mol%), K2HPO4 (0.5 equiv), PhSiH3 (1 mmol), MeCN (4 ml), blue LEDs, ambient temperature, 24-40 h.
