LAUSR

Heterogeneous manganese‐catalyzed C−H oxidative couplings were accomplished to gain access to pharmaceutically relevant 2‐aminophenoxazin‐3‐ones and to diaminophenazine and purpurogallin moieties in excellent yields. The user‐friendly K‐OMS‐2 oxidase strategy proved to be more versatile and robust than enzymatic catalysts‐based procedures allowing a wider substrate scope and being effectively reusable as proven by leaching measurements and XRD analyses.