Mild oxidative aromatization of 1,4-dihydropyridines with trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxalane promoted by ammonium bromide/HOAc in water/MeCN

Khosravi, Kaveh

doi:10.1080/23312009.2015.1052615

Cited by 7 publications

(1 citation statement)

References 56 publications

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“…92-99 15-560 min [54] 6 O 2 /Transition metal chloride/Sodium nitrite/TEMPO MeCN/AcOH/r.t. 90-98 30-60 min [48] 7 silica-supported/metal (Ni,Co,Fe,Cu)nitrates/ infra-red radiations 74-95 10-45 min [55] 8 H 2 O 2 /MoO 3 EtOH/Reflux 88-100 6 h [18] 9 Air/Na [57] 13 NaClO 2 /HCl EtOH/H 2 O/50 C 8 9 -99 20 min [6] solution was added dropwise in to the solution under mechanical stirring to adjust the pH to 10 and cause precipitation. The precipitated particles were separated using a strong permanent magnet and were washed three times using double distilled water.…”

Section: General Procedures For the Preparation Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Janani

Abdoli‐Senejani

Isfahani

2021

Applied Organom Chemis

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A facile and efficient method was described for oxidation of some 3,5-diacyl or 3,5-diester 1,4-dihydropyridines using H 2 O 2 in the presence of superparamagnetic core-shell metal-organic framework Fe 3 O 4 @Ni-MOF. The Fe 3 O 4 @Ni-MOF has been obtained byStep-by-Step method in which magnetic Fe 3 O 4 magnetic nanoparticles were coated with Ni-MOF using a mercaptoacetic acid linker. The synthesized catalyst was characterized using thermogravimetric analysis, FT-IR spectroscopy, powder X-ray diffraction, field emission scanning electron microscopy and energy-dispersive X-ray analysis. The novel superparamagnetic core-shell metal-organic framework Fe 3 O 4 @Ni-MOF revealed high efficiency for oxidation of various 1,4-dihydropyridines using hydrogen peroxide. The Box-Behnken design matrix and the response surface method were applied to investigate the optimization of the reaction conditions. The conditions for optimal reaction yield and time were: amount of catalyst ≈17 mmol, temperature ≈78 C and amount of hydrogen peroxide ≈ 1 ml. A variety of 3,5-diacyl or 3,5-diester 1,4-dihydropyridines with different substituted functional groups have been converted to corresponding pyridines with good to excellent isolated yields using H 2 O 2 and Fe 3 O 4 @Ni-MOF. The catalyst was reused up to five times for the oxidation of 1,4-dihydropyridines without a significant loss in catalytic activity. The short reaction times, simplicity of method, good to excellent yields and reusability of catalyst were some advantages of the proposed procedure.

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Section: General Procedures For the Preparation Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Janani

Abdoli‐Senejani

Isfahani

2021

Applied Organom Chemis

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Solvent‐ and Metal‐free Oxidative Esterification of Aromatic Aldehydes Using Urea‐2,2‐dihydroperoxypropane as a New Solid Oxidant

Khosravi

Khalaji

Naserifar

2017

J Chinese Chemical Soc

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Urea‐2,2‐dihydroperoxypropane as a Novel and High Oxygen Content Alternative to Dihydroperoxypropane in Several Oxidation Reactions

Khosravi

Naserifar

2019

ChemistrySelect

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Urea‐2,2‐dihydroperoxypropane (UDHPP)‐ a white crystalline solid oxidant which is formed when urea is recrystallized from dihydroperoxypropane‐ was applied as the terminal oxidant in several oxidative procedures namely epoxidation of α, β‐unsaturated ketones and alkenes, oxidation of sulfides to sulfoxides and sulfones, bayer‐villeger reaction, bromination and iodation of aniline and phenol derivatives, oxidative esterification, oxidative amidation of aromatic aldehydes, thiocyanation of aromatic compounds, and oxidation of pyridines, oxidation of secondary, allylic and benzylic alcohols. All the approaches were carried out under mild conditions and short reaction times and afforded the corresponding products in high yields.

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Mild oxidative aromatization of 1,4-dihydropyridines with trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxalane promoted by ammonium bromide/HOAc in water/MeCN

Cited by 7 publications

References 56 publications

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Solvent‐ and Metal‐free Oxidative Esterification of Aromatic Aldehydes Using Urea‐2,2‐dihydroperoxypropane as a New Solid Oxidant

Urea‐2,2‐dihydroperoxypropane as a Novel and High Oxygen Content Alternative to Dihydroperoxypropane in Several Oxidation Reactions

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Mild oxidative aromatization of 1,4-dihydropyridines with trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxalane promoted by ammonium bromide/HOAc in water/MeCN

Cited by 7 publications

References 56 publications

Superparamagnetic core‐shell metal–organic framework Fe3O4@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Superparamagnetic core‐shell metal–organic framework Fe3O4@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Solvent‐ and Metal‐free Oxidative Esterification of Aromatic Aldehydes Using Urea‐2,2‐dihydroperoxypropane as a New Solid Oxidant

Urea‐2,2‐dihydroperoxypropane as a Novel and High Oxygen Content Alternative to Dihydroperoxypropane in Several Oxidation Reactions

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Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide

Superparamagnetic core‐shell metal–organic framework Fe₃O₄@Ni‐MOF as efficient catalyst for oxidation of 1,4‐dihydropyridines using hydrogen peroxide