All reactions were carried out with dry solvents unless otherwise stated. Dry nitrogen was used as inert gas atmosphere. All solvents and required chemicals were purchased from commercial suppliers (Acros, Alfa Aesar, Fluka, Fluorochem, Merck, Sigma Aldrich, TCI) as reagent grade or at the highest commercial quality and were used directly without further purification unless stated otherwise. Thin-layer chromatography (TLC) was performed on silica gel coated alumina plates (MN TLC sheets ALUGRAM®Xtra SIL G/UV254). Visualization was accomplished with UV light (254 nm or 366 nm) sources. Standard flash chromatography was performed on a Biotage® IsoleraTM Spektra system automated with high performance flash purification system using either a prepacked Biotage® SNAP Ultra HP-SphereTM silica gel of particle size 25 μm or silica gel 60 M (particle size 40-63 μm, 230-440 mesh, Merck) or a reverse column (specification: Biotage® SNAP KP-C18-HS-12g). Photocatalytic reactions were performed using TAK 120 photoreactor equipped with blue LEDs (OSRAM OSLON® SSL 80 GD CS8PM1.14 LEDs (λ= 450 nm ± 15 nm), 5 W optical power), unless stated otherwise. The optical power of LEDs was determined using FieldMaxII-TOTM laser power meter equipped with PM3 sensor. GC measurements were performed on a GC 7890 from Agilent Technologies. Data acquisition and evaluation was done with Agilent Chem Station Rev.C.01.04. GC-MS measurements were performed on a 7890A GC system from Agilent Technologies with an Agilent 5975 MSD Detector. Data acquisition and evaluation was done with MSD Chem Station E.02.02.1431. A capillary column HP-5MS/30 m x 0.25 mm/0.25 μM film and helium as carrier gas (flow rate of 1 mL/min) were used. The injector temperature (split injection: 40:1 split) was 280 0 C, detection temperature 300 0 C (FID). GC measurements were made and investigated via integration of the signal obtained. The GC oven temperature program was adjusted as follows: initial temperature 40 0 C was kept for 3 minutes, the temperature was increased at a rate of 15 0 C/min over a period of 16 minutes until 280 0 C was reached and kept for 5 minutes, the temperature was again increased at a rate of 25 0 C/min over a period of 48 seconds until the final temperature (300 0 C) was reached and kept for 5 minutes. All NMR spectra were recorded at room temperature using a Bruker Avance 300 (300 MHz for 1 H, 75 MHz for All mass spectra were recorded on a Finnigan MAT 95, Thermo Quest Finnigan TSQ 7000, Finnigan MATSSQ 710 A or an Agilent Q-TOF 6540 UHD instrument. Photocatalytic reactions were performed using TAK 120 photoreactor equipped with blue LEDs (OSRAM OSLON® SSL 80 GD CS8PM1.14 LEDs (λ= 450 nm (± 15 nm), 5 W optical power), unless stated otherwise (Fig. ). The optical power of LEDs was determined using FieldMaxII-TOTM laser power meter equipped with PM3 sensor. The glass tube with reaction mixture and LED cooling block were thermostated at 35 °C. UV-Vis and fluorescence measurements were performed with a Varian Cary 100 UV/Vis spectro-photometer and FluoroMax-4 spectrofluorometer, respectively. Commercially available starting materials and solvents were used without further purification.