The author of 《Direct access to 2-difluoromethyl indoles via photoredox catalysis》 were Rubinski, Miles A.; Lopez, Simon E.; Dolbier, William R. Jr.. And the article was published in Journal of Fluorine Chemistry in 2019. Reference of fac-Tris(2-phenylpyridine)iridium The author mentioned the following in the article:
A visible-light mediated approach to radical difluoromethylation of 3- and 3,5-substituted indoles was investigated using a readily synthesized difluoromethyl source, CF2HPPh3Br. Direct difluoromethylation of indoles in the two position is a rare feat in the literature. The reactions were conducted at room temperature, using Ir(ppy)3 as photocatalyst in acetone, afforded the 2-difluoromethyl indoles in relatively low to moderate yields. The experimental part of the paper was very detailed, including the reaction process of fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Reference of fac-Tris(2-phenylpyridine)iridium)
fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Reference of fac-Tris(2-phenylpyridine)iridium