586-95-8Relevant articles and documents
New heterocyclic mono- and bis(α-hydroxymethyl)phosphinic acids: Synthesis and CuII binding abilities
Olszewski, Tomasz Krzysztof,Galezowska, Joanna,Boduszek, Bogdan,Kozlowski, Henryk
, p. 3539 - 3546 (2007)
A simple and efficient method for the synthesis of (α-hydroxymethyl) phosphinic acids in a pyridine and imidazole series from their corresponding aldehydes and aqueous hypophosphorous acid was developed. The same reaction carried out with an excess of aldehyde in the presence of a mineral acid led mainly to the corresponding bis(α-hydroxymethyl)phosphinic acids in moderate yields. The coordination properties of these compounds towards Cu II ions were determined. Additionally, it was found that [(hydroxy)-(2-pyridyl)- and (hydroxy)(4-pyridyl)methyl]phosphinic acids were easy to cleave in aqueous sulfuric acid solutions, to form phosphorus acid (H3PO3) and the corresponding pyridinemethanols. The kinetics of the cleavage reaction was studied. On the basis of the obtained results, a mechanism of the cleavage was formulated. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
Homoleptic cobalt(II) phenoxyimine complexes for hydrosilylation of aldehydes and ketones without base activation of cobalt(II)
Hori, Momoko,Ishikawa, Ryuta,Koga, Yuji,Matsubara, Kouki,Mitsuyama, Tomoaki,Shin, Sayaka
, p. 1379 - 1387 (2021/05/29)
Air-stable, easy to prepare, homoleptic cobalt(II) complexes bearing pendant-modified phenoxyimine ligands were synthesized and determined. The complexes exhibited high catalytic performance for reducing aldehydes and ketones via catalytic hydrosilylation, where a hydrosilane and a catalytic amount of the cobalt(II) complex were added under base-free conditions. The reaction proceeded even in the presence of excess water, and excellent functional-group tolerance was observed. Subsequent hydrolysis gave the alcohol in high yields. Moreover, H2O had a critical role in activation of the Co(II) catalyst with hydrosilane. Several additional results also indicated that the cobalt(II) center acts as an active catalyst in the hydrosilylation of aldehydes and ketones.
Iron-catalyzed chemoselective hydride transfer reactions
Coufourier, Sébastien,Ndiaye, Daouda,Gaillard, Quentin Gaignard,Bettoni, Léo,Joly, Nicolas,Mbaye, Mbaye Diagne,Poater, Albert,Gaillard, Sylvain,Renaud, Jean-Luc
supporting information, (2021/06/07)
A Diaminocyclopentadienone iron tricarbonyl complex has been applied in chemoselective hydrogen transfer reductions. This bifunctional iron complex demonstrated a broad applicability in mild conditions in various reactions, such as reduction of aldehydes over ketones, reductive alkylation of various functionalized amines with functionalized aldehydes and reduction of α,β-unsaturated ketones into the corresponding saturated ketones. A broad range of functionalized substrates has been isolated in excellent yields with this practical procedure.