Visible light mediated aerobic radical C–H phosphorization toward arylphosphonates†
Abstract
A visible light mediated radical C–H phosphorization of benzothiazoles with O2 as the sole oxidant was developed towards the synthesis of various 2-diarylphosphoryl benzothiazoles. The phosphonyl radical was identified by EPR experiments. In situ31P NMR experiments showed that Ph2P(O)H mainly converted into the desired product and the oxidative byproduct Ph2P(O)OH.