Highly efficient methodology for aromatization of 1, 4-dihydropyridines using silica-supported transition metal nitrates under infra-red radiations

Chandrachood, Pranav; Gadkari, Tushar; Deshpande, Nilesh; Kashalkar, R. V.

doi:10.1007/s13738-011-0010-2

Cited by 4 publications

(2 citation statements)

References 29 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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“…The oxidation of DHPs has been conducted using catalytic amounts of silica-supported transition metal nitrates such as Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O under solvent-free conditions, previously grinding in a mortar ( Scheme 21 ) [ 30 ].…”

Section: Multicomponent Reactionsmentioning

confidence: 99%

Infrared Irradiation: Toward Green Chemistry, a Review

Escobedo

Miranda

Martínez

2016

IJMS

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This review provides a comprehensive overview of where infrared irradiation has been employed, mainly as regards activating green mode for natural products extractions, as well as to favor a reaction, highlighting its actual importance. It is also underlined that infrared irradiation heating has been around for a long time; however, only in the last eighteen years have many of its advantages been applied to satisfy a wide range of chemical processes, natural products extractions, and for the promotion of many kinds of reactions. In addition, it is brought to light that near infrared irradiation is more efficient than middle and far infrared irradiations, being easily controllable and with the quality of a fast responding heat source. Thus, the main objective of this review is to offer infrared irradiation as an alternative clean energy source to activate reactions, in addition to favor the selective extraction of natural products, all of which is within the Green Chemistry protocol. Some recent results from our laboratory are also included.

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Synthesis, Characterization and Catalytic Activity of Molybdenum Oxide Nanoparticles by Albumen, Assisting Microwave Process for Dehydrogenation of 1,4-Dihydropyridines

2014

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Highly efficient methodology for aromatization of 1, 4-dihydropyridines using silica-supported transition metal nitrates under infra-red radiations

Cited by 4 publications

References 29 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

Infrared Irradiation: Toward Green Chemistry, a Review

Synthesis, Characterization and Catalytic Activity of Molybdenum Oxide Nanoparticles by Albumen, Assisting Microwave Process for Dehydrogenation of 1,4-Dihydropyridines

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Highly efficient methodology for aromatization of 1, 4-dihydropyridines using silica-supported transition metal nitrates under infra-red radiations

Cited by 4 publications

References 29 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

Infrared Irradiation: Toward Green Chemistry, a Review

Synthesis, Characterization and Catalytic Activity of Molybdenum Oxide Nanoparticles by Albumen, Assisting Microwave Process for Dehydrogenation of 1,4-Dihydropyridines

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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