Photoredox catalysis has emerged as a valuable method in synthetic chemistry, as it utilizes light to attain a highly reducing or oxidizing photoactive intermediate states to facilitate synthetic transformations. However, many of the photoredox catalysts are based on rare-earth transition metals, which are expensive and can be challenging to adopt in metal-sensitive applications including pharmaceutical and micro-electronics. We have recently reported 10-phenylphenothiazine (PTH) as a metal-free catalyst capable of reductive dehalogenation. Herein, we introduce synthetically modified PTH catalysts to achieve a varying degree of redox potentials and demonstrate new reactions realized by these PTH-based catalysts.

New reactions with a simple, versatile, and metal-free photoredoxcatalyst

251st National Meeting (2016)

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