One‐Pot effective synthesis of new heterocyclic system: pyrano[4',3':4,5]pyrido[2,3‐ d ]pyrimidin‐6‐one

2021 ◽  
Author(s):  
Arpine S. Harutyunyan ◽  
Shushanik Sh. Dashyan ◽  
Astghik A. Shahkhatuni
Keyword(s):  
Heterocyclic System ◽  
One Pot ◽  
Effective Synthesis

scholarly journals Facile Synthesis of COF-Supported Reduced Pd-Based Catalyst for One-Pot Reductive Amination of Aldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 287
Author(s):  
Jianguo Liu ◽  
Mingyue Zhang ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalysts ◽  
Reductive Amination ◽  
Secondary Amines ◽  
Metallic State ◽  
One Pot ◽  
Effective Synthesis ◽  
Pharmaceutical Industries ◽  
The One ◽  
Heterocyclic Aldehydes ◽  
Supported Pd

Dibenzylamine motifs are an important class of crucial organic compounds and are widely used in fine chemical and pharmaceutical industries. The development of the efficient, economical, and environmentally friendly synthesis of amines using transition metal-based heterogeneous catalysts remains both desirable and challenging. Herein, we prepared the covalent organic framework (COF)-supported heterogeneous reduced COF-supported Pd-based catalyst and used it for the one-pot reductive amination of aldehydes. There are both Pd metallic state and oxidated Pdσ+ in the catalysts. Furthermore, in the presence of the reduced COF-supported Pd-based catalyst, many aromatic, aliphatic, and heterocyclic aldehydes with various functional groups substituted were converted to their corresponding amines products in good to excellent selectivity (up to 91%) under mild reaction conditions (70 °C, 2 h, NH3, 20 bar H2). This work expands the covalent organic frameworks for the material family and its support catalyst, opening up new catalytic applications in the economical, practical, and effective synthesis of secondary amines.

ChemInform Abstract: A Facile One-Pot Highly Chemo- and Regioselective Synthesis of the Novel Heterocyclic System Indolo[1,2-c]azolo[1,5-a]quinazoline-8,10-dione.

ChemInform ◽  
2014 ◽  
Vol 45 (24) ◽  
pp. no-no
Author(s):  
Olesya N. Petrova ◽  
Lali L. Zamigajlo ◽  
Svetlana V. Shishkina ◽  
Oleg V. Shishkin ◽  
Vladimir I. Musatov ◽  
...  
Keyword(s):  
Heterocyclic System ◽  
Regioselective Synthesis ◽  
The Novel ◽  
One Pot

scholarly journals Ag2O/GO/TiO2 Composite Nanostructure: an efficient heterogeneous catalyst for one pot synthesis of Bis (dihydropyrimidinone) and tetrahydro-4H-chromenes derivatives

2021 ◽  
Author(s):  
Fatemeh Samandi Zadeh ◽  
Mohammad Kazem Mohammadi ◽  
Ayeh Raeiatzadeh ◽  
Neda Hasanzadeh
Keyword(s):  
Condensation Reaction ◽  
Aromatic Aldehydes ◽  
Synthesis Methods ◽  
X Ray Diffraction ◽  
One Pot ◽  
Transmission Electron ◽  
One Pot Condensation ◽  
Effective Synthesis ◽  
Ft Ir ◽  
Biginelli Condensation

Abstract The simple and efficient synthesis reaction was used for preparing Bis (dihydropyrimidinone) derivatives through Biginelli condensation reaction of terephthalic aldehyde, 1, 3-dicarbonyl compounds and (thio) urea or guanidine and tetrahydro-4H-chromenes via one pot condensation of aromatic aldehydes, malononitrile and dimedone with Ag2O/GO/TiO2 composite nanostructures as a catalyst. The structural functionalities and morphological observations of catalyst were obtained using characterization techniques of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transfer infrared (FT-IR) spectroscopy and transmission electron microscope (TEM). The structures of Bis (dihydropyrimidinone) and tetrahydro-4H-chromenes confirmed by FT- IR, NMR and mass spectroscopy. Excellent yields of the products, simple reaction process and simple work-up are attractive features of these effective synthesis methods.

Chemoselective synthesis of long-chain alkyl-H-phosphinic acids via one-pot alkylation/oxidation of red phosphorus with alkyl-PEGs as recyclable micellar catalysts

2021 ◽  
Author(s):  
Vladimir A. Kuimov ◽  
Svetlana F. Malysheva ◽  
Natalia A. Belogorlova ◽  
Nina K. Gusarova ◽  
Boris A. Trofimov
Keyword(s):  
Red Phosphorus ◽  
One Pot ◽  
Alkyl Bromide ◽  
Chemoselective Synthesis ◽  
Phosphinic Acids ◽  
Effective Synthesis ◽  
The One ◽  
Multi Phase ◽  
Long Chain

Alkyl-PEG recyclable micellar catalysts are used for the chemoselective and effective synthesis of long-chain n-alkyl-H-phosphinic acids via the one-pot alkylation/oxidation of red phosphorus in the multi-phase alkyl bromide/KOH/H2O/toluene system.

An efficient one-pot synthesis of a new heterocyclic system with high-fluorescent properties

2011 ◽  
Vol 49 (1) ◽  
pp. 208-211 ◽  
Author(s):  
Mohammad Rahimizadeh ◽  
Mehdi Pordel ◽  
Mahsa Ranaei ◽  
Mehdi Bakavoli
Keyword(s):  
Heterocyclic System ◽  
Fluorescent Properties ◽  
One Pot ◽  
One Pot Synthesis

scholarly journals Green synthesis approach and theoretical studies for Cr(III), Mn(II), Fe(III), Co(II) and Ni(II) complexes with NNS donor Schiff base ligand

2019 ◽  
Vol 9 (6) ◽  
pp. 4567-4574 ◽  
Keyword(s):  
Spectral Studies ◽  
Environmental Harm ◽  
Magnetic Studies ◽  
One Pot ◽  
Synthesis Conditions ◽  
13C Nuclear Magnetic Resonance ◽  
Effective Synthesis ◽  
Diffraction Patterns ◽  
Magnetic Resonance Scanning ◽  
Xrd Techniques

The green synthetic processes have synthetized five Cr(III), Mn(II), Fe(III), Co(III) and Ni(II) complexes. In the current study, their synthesis by ball mining is decorated in a simple one-pot synthesis, cost efficiency, easy to measure for commercial manufacture, effective synthesis conditions such as moderate temperature and shorter length, thus preventing further by-products which could cause environmental harm, and being environmentally friendly as it is. All five complexes are well-defined, polyncrystalline materials as their Powder X-ray diffraction patterns indicate. The characterization of these complexes had been Fourier Transform Infrared Spectroscopy(FT-IR), 1H-13C Nuclear magnetic resonance, Scanning Electron Microscopy (SEM), electronic absorption spectral studies as well as magnetic studies and Powder XRD techniques.

scholarly journals Ag2O/GO/TiO2 Composite Nanostructure: An Efficient Heterogeneous Catalyst for one Pot Synthesis of Bis (Dihydropyrimidinone) and Tetrahydro-4H-chromenes Derivatives

2020 ◽  
Author(s):  
Fatemeh Samandi Zadeh ◽  
Mohammad Kazem Mohammadi ◽  
Ayeh Rayatzadeh ◽  
Neda Hasanzadeh
Keyword(s):  
Condensation Reaction ◽  
Aromatic Aldehydes ◽  
Synthesis Methods ◽  
X Ray Diffraction ◽  
One Pot ◽  
Transmission Electron ◽  
One Pot Condensation ◽  
Effective Synthesis ◽  
Ft Ir ◽  
Biginelli Condensation

Abstract The simple and efficient synthesis reaction was used for preparing Bis (dihydropyrimidinone) derivatives through Biginelli condensation reaction of terephthalic aldehyde, 1, 3-dicarbonyl compounds and (thio) urea or guanidine and tetrahydro-4H-chromenes via one pot condensation of aromatic aldehydes, malononitrile and dimedone with Ag2O/GO/TiO2 composite nanostructures as a catalyst. The structural functionalities and morphological observations of catalyst were obtained using characterization techniques of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transfer infrared (FT-IR) spectroscopy and transmission electron microscope (TEM). The structures of Bis (dihydropyrimidinone) and tetrahydro-4H-chromenes confirmed by FT- IR, NMR and mass spectroscopy. Excellent yields of the products, simple reaction process and simple work-up are attractive features of these effective synthesis methods.

scholarly journals Amberlite IR-120 Catalyzed Green and Efficient One-Pot Synthesis of Benzylpyrazolyl Coumarin in Aqueous Medium

2021 ◽  
Vol 10 (3) ◽  
pp. 2525-2534
Keyword(s):  
Reaction Time ◽  
Aqueous Medium ◽  
Ethyl Acetoacetate ◽  
Low Cost ◽  
Cost Effective ◽  
High Yield ◽  
Phenyl Hydrazine ◽  
One Pot ◽  
Time Operation ◽  
Effective Synthesis

An efficient, green, and cost-effective synthesis of benzylpyrazolyl coumarin by one-pot four-component condensation of hydrazine hydrate or phenyl hydrazine, ethyl acetoacetate, aromatic aldehyde, and 4-hydroxycoumarin in the presence of Amberlite IR-120 as a catalyst in an aqueous medium has been reported. Shorter reaction time, operation simplicity, low cost of catalyst, and aqueous medium are key advantages of this method for synthesizing benzylpyrazolyl coumarin in moderate to high yield.

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