*3.1. General Experimental Procedures*

The NMR spectra of **3a–j** were acquired using a Bruker Avance 400 MHz spectrometer (Bruker, Billerica, MA, USA) (400,133 MHz for 1H, 100.624 MHz for 13C). Measurements were done in CDCl3 at 27 ◦C. Chemical shifts were calibrated to solvent signal: CHCl3 7.26 ppm (residual signal solvent) and 77.16 ppm for 1H and 13C, respectively, and informed relative to Me4Si. Thin-layer chromatography was done with a Merck Kiesegel 60 F254, 0.2 mm thick and semipreparative thin layer chromatography on Merck Kieselgel 60 F254 0.25 mm thick. A Thermo Scientific GC-MS system (GC: model: Trace 1300 and MS: model TSQ8000Evo) (Waltham, Massachusetts, USA) was used to analyze the sample. The separation was performed on a 60 m × 0.25 mm internal diameter fused silica capillary column coated with 0.25 μm film Rtx-5MS. The oven temperature was maintained at 40 ◦C for 5 min, then it was programmed from 40 to 80 at 5 ◦C/min for 1 min, then from 80 to 300 at 10 ◦C/min and finally maintained at 300 ◦C for 10 min. The mode used was splitless injection, helium was used as carrier gas, and flow-rate was 1.2 mL/min. Mass spectra were recorded over a range of 40 to 400 atomic mass units at 0.2 s/scan. Solvent cut time was 11 min. Ionization energy was 70 eV.
