Ruthenium(II)-NHC-catalyzed (NHC = perhydrobenzimidazol-2-ylidene) alkylation of amines using the hydrogen borrowing methodology under solvent-free conditions

Solvent/metal-free benzimidazolium-based carboxyl-functionalized porphyrin photocatalysts for the room-temperature alkylation of amines under the irradiation of visible light

“…1 H NMR and 13 C spectra of all the intercedes were recorded using a Bruker spectrometer operating at 400 MHz at normal temperature using DMSO-d 6 and CDCl 3 as solvents and TMS (δ = 0.00) for 1 H calibration. FT-IR spectra were recorded using an IR affinity 1 Shimadzu FT-IR spectrophotometer by the KBr pellet method.…”

“…1 H NMR 400 MHz, DMSO-d 6 : δ 7.20 (s, 4H), 7.03 (q, 4H), 4.12 (q, 4H). 13 C NMR 100 MHz, DMSO-d 6 : 132.52, 130.10, 129.83, 29.73.…”

“…3) N 1 ,N 4 -Dimethylbenzene-1,4-diamine (D3). 4H), 1.49 (q, 2H), 1.19 (q, 2H), 0.87 (t, 6H), 13 CNMR 100 MHz, DMSO-d 6 : δ 131. 86, 116.74, 60.48, 25.80, 20.93, 14.11, 10.18.…”

“…23) 4-Propylmorpholine (D23). 400 MHz, DMSO-d 6 : δ 3.42 (q, 4H), 3.15 (t, 2H), 2.94 (t, 4H), 2.82 (q, 2H), 1.06 (t, 3H) 13…”

“…A series of homogenous catalysis systems play a vital role in the generation of N -alkylated products. Basically, the homogenous system includes Au, 13 Ag, 14 Os, 15 Ru, 16,17 Ir, 18 Rh, 19 and non-noble systems such as Cu, 20 Ni, 21 and W (ref. 22) catalysts.…”