91633-13-5

Upstream product

• 91633-10-2 Tetraethyl (2-hydroxy-5-methoxy-1,3-phenylene)bis(phosphonate) 
• 91633-08-8 Diethyl 2-(diethoxyphosphinyl)-4-methoxyphenyl phosphate 
• 80615-41-4 diethyl ether of 2-hydroxy-5-methoxyphenylphosphonic acid 
• 98057-63-7 di-t-butyl (4-methoxyphenyl) phosphate 
• 150-76-5 4-methoxy-phenol 
• 5076-68-6 diethyl 4-methoxyphenyl phosphate 

Relevant academic research and scientific papers

Solvent and catalyst-free synthesis, corrosion protection, thermodynamic, MDS and DFT calculation of two environmentally friendly inhibitors: Bis-phosphonic acids

Solvent and catalyst-free synthesis of two bis-phosphonic acids were realized adopting one-pot reaction of 2,6-bis (hydroxymethyl)-4-methoxyphenol or 4-chloro- 2,6-bis (hydroxymethyl) phenol with trialkyl phosphite. Their structures were confirmed by 1H, 13C, 31P NMR and IR spectroscopies. The molecular structures have been optimized using DFT, and the related calculated vibrational frequencies and NMR shift confirm the proposed structures. Chemical and electrochemical tests evaluated the inhibitive capabilities on the XC48 steel corrosion against 1 M HCl. The weight loss (chemical one) shows that the adsorption on the XC48 steel surface obeys to Langmuir isotherm, while the polarization measurements suggest that the inhibition process is mixt, the results of Electrochemical Impedance Spectroscopy (EIS) prove an increase of the inhibition efficiency with the increase of inhibitor concentrations. The surface topographies were analyzed by the Atomic Force Microscopy (AFM). The Density Functional Theory (DFT) with B3LYP as correlation function and 6-31G (p, d) as basis sets were used to determine some theoretical physic-chemical parameters affecting the corrosion inhibition and on the other hand the DFT develop the Frontier Molecular Orbitals (FMOs) and the Molecular Electrostatic Potentials (MEP) and through a discussion was made about their relationship with the inhibition of the corrosion. At the end, Molecular Dynamics Simulations (MDS) based on Monte-Carlo calculations were accomplished to simulate the interface configuration between the inhibitor molecules and Fe (110)/H2O.

REARRANGEMENT OF DI-T-BUTYL ARYL PHOSPHATES TO DI-T-BUTYL(2-HYDROXYARYL)PHOSPHONATES. PREPARATION OF (2-HYDROXY-1,3-PHENYLENE)BISPHOSPHONIC ACIDS

Di-t-butyl aryl phosphates 3 on treatment with lithium diisopropylamide rearrange to di-t-butyl (2-hydroxyaryl)phosphonates 5.A di-t-butyl (2-hydroxyaryl) phosphonate on reaction with di-t-butyl phosphorochloridate yields a phosphate-phosphonate 8 which o

o-Hydroxyaryl Diphosphonic Acids

Treatment of dialkyl aryl phosphates with n-butyllithium or lithium diisopropylamide results in a rearrangement that involves the fission of an oxygen-phosphorus bond and formation of a C-P bond yielding dialkyl (2-hydroxyaryl)phosphonates.A dialkyl (2-hy