Di 2 picolyl amine

All experiments were carried out using dry solvents. The boronic acid, dialkyl phosphites, DIPEA, triethylamine, pyridine, 2,2′-dipyridylamine, 2-picolylamine, di-(2-picolyl)amine, and ter-pyridine, as well as the cobalt salts, were purchased from Sigma Aldrich. Silica gel for column chromatography and thin layer chromatography (TLC) plates (Silica gel 60 F₂₅₄) were ordered from EMD/Merck. The analytical thin layer chromatography was eluted in the Ethylacetate/Hexane (30:70) solvent system. An ultra-violet lamp, iodine chamber, and PMA solution spray was used to visualize the product spots on thin layer chromatography (TLC). ¹H-NMR and ¹³C-NMR spectra were recorded on Bruker Advance 400 and 100 MHz, respectively, and were referenced to residual protic solvent (CDCl3 ¹H [7.26 ppm] and CDCl3 ¹³C [77.00 ppm]. Mass analyses were performed on the Joel GC-MS instrument (EI). The products were fully characterized using ¹H-NMR, ¹³C-NMR, ³¹P-NMR, and GC-MS, and the relevant data has been provided in this section. All reagents were used as received from commercial sources without further purification.