Microwave-assisted synthesis of α-aminophosphonates with sterically demanding α-aryl substituents
作者:Harry R. Hudson、Ádám Tajti、Erika Bálint、Mátyás Czugler、Konstantin Karaghiosoff、György Keglevich
DOI:10.1080/00397911.2019.1679186
日期:2020.5.18
Abstract A series of N-benzhydryl protected α-aminophosphonates with α-phenyl, α-(1-naphtyl), α-(9-anthryl) or α-(1-pyrenyl) substituents was synthesized by the Kabachnik–Fields condensation of diphenylmethylamine (benzhydrylamine), the corresponding aryl aldehyde and a dialkyl phosphite under MW irradiation. X-ray studies performed at low temperatures for a few of these α-aminophosphonates confirmed
Highly efficient green synthesis of α-hydroxyphosphonates using a recyclable choline hydroxide catalyst
作者:Reddi Mohan Naidu Kalla、Yu Zhang、Il Kim
DOI:10.1039/c6nj03948k
日期:——
Choline hydroxide has been found to be an efficient basic ionic liquid catalyst for the synthesis of α-hydroxyphosphonates. Hydrophosphonylation of aldehydes was performed via the nucleophilic addition of diethylphosphite to aldehydic carbonyl compounds, in the presence of choline hydroxide under neat as well as solvent conditions. A wide array of substrates, including aromatic, fused aromatic, and
The reaction of anthracenyl-α-hydroxyphosphonate with anthracene: Access to diverse (<i>bis</i>)-anthracenylmethylphosphonates as a suitable source for extensive π-conjugates
Abstract Molecular anthracene has been used as an arene in the Friedel-Crafts (FC) type arylation reaction of anthracenyl-α-hydroxyphosphonate in the presence of acid. A diverse product formation is observed, in which anthracene unit is found to be linked through its C1 position with α-C of phosphonate. Interestingly, the molecular conformation (X-ray structure) of this phosphonate reveals one of the
Isomeric Benzenediol-Linked Organophosphonates as a Handy Reusable Emitting Platform: Diversity in Polyamine Vapor Detection
作者:Akshita Jain、Pandiyan Sivasakthi、Pralok K. Samanta、Manab Chakravarty
DOI:10.1021/acs.joc.3c02490
日期:2024.4.5
diamine–dihydroxy (amine–phenol type) interactions in the solidphase, leading to a quenched emission with selectively smaller aliphatic PAs, that is, DAP and EDA. The disparity was noticed with an isomeric resorcinol-linked emitter (RAP), detecting various polyamine vapors with superior sensitivity. A one-carbon-away placed hydroxy group in RAP can only generate a monoamine–hydroxy complex, not diamine–dihydroxy.
synthesized from the reaction of aldehyde (1) with triethylphosphite (2) in the presence of oxone and evaluated for their antioxidantproperties against lipid peroxidation, reduced glutathione, superoxide dismutase, and catalase. The majority of the compounds showed promising antioxidant activity. Diethyl anthracen‐9‐yl (hydroxy) methylphosphonate (3n) is the most potent and biologically active compound