A Straightforward Synthesis of 1,2‐Azaphosphindoles

Abstract

Treatment of ortho‐(diphenylphosphanyl)phenyl nitriles with an excess of lithium at room temperature in THF gives 1,2‐azaphosphindolides, which can react with RX (benzyl bromide, 1‐bromopropane, and 1,2‐dibromoethane) to form 2H‐1,2‐azaphosphindoles and give the aromatic 1H‐1,2‐azaphosphindoles upon protonation.

Pd(II) Complexes with Chelating Phosphinoferrocene Diaminocarbene Ligands: Synthesis, Characterization, and Catalytic Use in Pd-Catalyzed Borylation of Aryl Bromides

“…Recently, Duan and Matthey and our group have reported the synthesis of the first phosphines bearing isocyanide substituents potentially suitable for the preparation of chelate complexes (compounds E and 1 in Chart ). Having demonstrated that isocyanide 1 readily inserts into Pd–C bonds to produce Pd­(II) imidoyl complexes, we decided to extend our studies toward the synthesis of new phosphinoferrocene–carbene complexes via reactions of Pd- 1 species with amine nucleophiles.…”

NHC-Catalyzed Synthesis of Benzazole-Phosphine Ligands under an Air Atmosphere

“…The solvents were removed under reduced pressure to give a crude product which was purified by column chromatography on silica gel. 2-(diphenylphosphino) benzonitrile (S1) [6] 2-bromobenzonitrile (9.0 g, 49.7 mmol) was following the General Procedure A. The residue was purified by recrystallization from methanol to afford (10.0 g, 70 %) as a white solid.…”

“…1 H NMR (300 MHz, CDCl 3 ) δ 7.73-7.70 (m, 1 H), 7.50-7.26 (m, 12 H), 7.04-7.01 (m, 1 H); 31 P NMR (121 MHz,CDCl 3 ) δ -7.74. 2-(diphenylphosphino)-5-methylbenzonitrile (S2) [6] 2-bromo-5-methylbenzonitrile (2.6 g, 13.3 mmol) was following the General Procedure A. The residue was purified by recrystallization from methanol to afford (3.0 g, 75 %) as a white solid.…”

Tailoring Co(OH)2 hollow nanostructures via Cu2O template etching for high performance supercapacitors

“…Among the pseudocapacitive electrode materials, Co(OH) 2 is very attractive due to its high theoretical specific capacitance (3470 F/g), low cost and well-defined electrochemical redox activity [15]. In the early times, Co(OH) 2 was mainly synthesized by traditional chemical precipitation method, which shows limited specific capacitance in a range of 200-341 F/g [16][17][18][19]. Later, Co(OH) 2 was electrochemically deposited on various substrate [20,16] or support material [21,22], but mainly resulting in micro-thin or nano-thin Co(OH) 2 films.…”