- Correction: A novel polymer containing phosphorus-nitrogen ligands for stabilization of palladium nanoparticles: An efficient and recyclable catalyst for Suzuki and Sonogashira reactions in neat water (Dalton Transactions (2015) 44 (14293-14303) DOI: 10.1039/C5DT01642H)
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The authors regret that the second step in Scheme 1 of the above mentioned paper was incorrect, this has been corrected below and the characterization supporting the identity of compound 2 is presented herein. This correction does not affect the discussion or conclusions of the original article. (Figure Presented). The 31P NMR spectrum of product 2 showed a chemical shift for 31P at 36.7 ppm (Fig. 1). The 1H NMR spectrum of compound 2 showed a single peak at 9.64 which is related to a phenolic proton (Fig. 1a). Adding a drop of D2O to the sample, resulted in removing the phenolic hydrogen signal at 9.6 ppm and confirmed that the compound has a phenolic proton (Fig. 2b). The presence of the hydroxyl group was also confirmed by FTIR showing a related peak at 3347 cm-1 (Fig. 3). The 1H NMR spectrum of the product shows three multiple signals at (5.7-5.8), (6.3-6.6), (7.5-7.7), and (7.8-8.0) ppm that may be coupled with the 31P nucleus. To investigate this issue, we compared the original 1H NMR spectrum with its 1H{31P} spectrum. Results indicated removal of the small splitting caused by the phosphorous group in the above mentioned area (Fig. 4). Procedure for the preparation of polymer 3. (Figure Presented). Acryloyl chloride (1 mmol, 0.08 mL) was added to a flask containing a solution of 2-aminophenol (1 mmol, 0.11 g) in dry THF (5 mL) at 0 °C under an argon atmosphere. Then, Et3N (1 mmol, 0.14 mL) was added dropwise at 0 °C and the mixture was stirred for 2 h at room temperature. Afterwards, the reaction mixture was filtered to separate the triethylammonium chloride salt produced. To the resulting solution, chlorodiphenylphosphine (1.1 mmol, 0.2 g) and Et3N (1 mmol, 0.14 mL) was added and the reaction was stirred for 24 h at 50 °C. Then, solvent was evaporated and the desired product was purified by plate chromatography. For polymerization of the obtained monomer, the phosphinite monomer (2) (5 mmol, 1.7 g) was dissolved in t-BuOH (5 mL) and AIBN (0.008 g, 0.5% w/w) was added to the mixture under argon protection. The mixture was stirred for 24 h at 70 °C under an argon atmosphere. Then, t-BuOH was evaporated and the obtained pale yellow solid was washed with H2O (10 mL) and hexane (30 mL) and dried in an oven for 24 h at 80 °C. (Figure Presented). The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.
- Gholinejad,Hamed,Biji
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The invention relates to the field of research of temperature-resistant salt-resistant oil-displacing agents, and discloses a temperature-resistant salt-resistant monomer and polymer, and a preparation method and application thereof. The structure of the
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Paragraph 0091; 0092; 0093; 0095; 0096
(2017/08/28)
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Gold nanoparticles supported on a polyacrylamide containing a phosphinite ligand have been synthesized and characterized using different techniques such as TEM, SEM, EDX, XPS, and solid UV analyses. The new material was successfully applied as a heterogen
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supporting information
p. 1193 - 1201
(2016/05/10)
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- A novel polymer containing phosphorus-nitrogen ligands for stabilization of palladium nanoparticles: An efficient and recyclable catalyst for Suzuki and Sonogashira reactions in neat water
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A new polymer containing phosphorus and nitrogen ligands was successfully synthesized, characterized and used for the stabilization of highly monodispersed palladium nanoparticles having an average diameter of 2-3 nm. The thermally stable heterogeneous catalyst was successfully applied in Suzuki-Miyaura and copper-free Sonogashira-Hagihara coupling reactions of aryl halides under low palladium loading conditions. Reactions were proceeded in neat water without using any organic co-solvents. The catalyst was successfully recycled for the sample Suzuki-Miyaura reaction nine consecutive times with small drop in catalytic activity.
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Ring around the rosy: An amino group can act as the leaving group or the nucleophile in a palladium-catalyzed allylic amination. As a result, readily accessible cyclic amines can be either ring contracted or ring expanded (see scheme).
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supporting information; experimental part
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The present invention relates to a novel (meth)acrylamide compound represented by the general formula (1), a (co)polymer of the (meth)acrylamide compound, and a chemically amplified photosensitive resin composition composed of the polymer and a photoacid generator. In the formula, R1 represents a hydrogen atom or a methyl group; R2 represents an acid-decomposable group; and R3 to R6 independently represent a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms.
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AlCl3-mediated decomposition of N-methoxy-N-phenylamides in dichloroethane leads to regioselective intramolecular migration of the methoxy group from the nitrogen to the ortho position of the phenyl ring via a tight ion pair intermediate.
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The intramolecular Diels-Alder reactions between acyclic dienes and alpha , beta -unsaturated amides utilizing the internal coordination of the metal salts have been studied in detail. When the magnesium salts of N-(trans, trans-2,4-alkadienyl)-N-(2-hydro
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