1.1: 5,15,10,20-tetraphenylporphyrin; oxygen / dichloromethane / 24 h / 25 °C / |Inert atmosphere; |UV-irradiation 2.1: thiourea / methanol / 2 h / 25 °C / |Inert atmosphere 3.1: triethylamine / dichloromethane / 1.5 h / 0 °C / |Inert atmosphere 4.1: toluene / 3 h / 110 °C / |Inert atmosphere 5.1: phosphorous acid trimethyl ester / 16 h / 111 °C / |Inert atmosphere 6.1: hydrogenchloride / dichloromethane; diethyl ether / 0.25 h / 0 °C / |Inert atmosphere 7.1: lithium hydroxide hydrate / tetrahydrofuran; water / 5 h / 0 - 25 °C 7.2: pH 3 8.1: N-ethyl-N,N-diisopropylamine; 1-hydroxy-7-aza-benzotriazole; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate / dichloromethane / 15 h / 0 - 25 °C / |Inert atmosphere 9.1: dichloromethane / 3 h / 0 - 25 °C / |Inert atmosphere 10.1: triethylamine / dichloromethane / 15 h / 0 - 25 °C / |Inert atmosphere 11.1: lithium hexamethyldisilazane; sulfur / tetrahydrofuran / 2.08 h / 25 °C / |Inert atmosphere View Scheme