scholarly journals One-pot synthesis and structure of isomeric aryl-substituted triazolohexahydroquinazolines

2021 ◽  
Vol 21 (2) ◽  
pp. 128-133
Author(s):  
Natalia O. Vasil’kova ◽  
◽  
Darya M. Demidova ◽  
Adel’ P. Kriven’ko ◽  
◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Two Dimensional ◽  
One Pot ◽  
General Direction ◽  
One Dimensional ◽  
One Pot Synthesis ◽  
Composition And Structure ◽  
Selective Process

Aryl-substituted triazolohexahydroquinazolines have been synthesized by means of three-component condensation of pnitro(pbromo) benzaldehydes, cyclohexanone, 1,2,4-triazol-3-amine. A scheme of the reaction mechanism is proposed, which makes it possible to explain the features of the behavior of p-nitro(bromo) benzaldehydes in condensation reactions in comparison with their ortho-substituted analogs. It has been found that the movement of the substituent from the ortho- tо -para-position of the benzene ring while maintaining the general direction of the reaction has a decisive effect on the number and ratio of the formed isomers and leads to the absence of hydroxylated forms of triazolohexahydroquinazolines. The composition and structure of the products have been confirmed by the data of elemental analysis, IR and one-dimensional, two-dimensional NMR spectroscopy. One-pot synthesis of aryl-substituted triazohexahydroquinazolines is a non-selective process that leads to a mixture of isomers, the structure and ratio of which is determined by the nature and position of the substituent groups in the aldehyde component.

One-Pot Synthesis of Lanthanide and Yttrium Cryptates Containing Pyridine Units

1997 ◽  
Vol 52 (10) ◽  
pp. 1273-1277 ◽  
Author(s):  
Fernando Avecilla ◽  
Rufina Bastida ◽  
Andrés de Blas ◽  
Eugenia Carrera ◽  
David E. Fenton ◽  
...  
Keyword(s):  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Molar Conductivity ◽  
One Pot ◽  
H Nmr ◽  
One Pot Synthesis ◽  
Step Procedure ◽  
One Step ◽  
High Yields

Complexes of yttrium (III) and lanthanide(III) ions with an axial macrobicycle derived from the 2+3 Schiff-base condensation of tris(2-aminoethyl)amine with 2,6-diformylpyridine have been prepared in high yields using a one-step procedure. The complexes, with formula [M2L](NO3)6 · xH2O · ySolv, (M = Y, La - Lu, except Pm) and [M 2L](ClO4)6 · xH2O · ySolv, (M = La - Er, except Pm ), have been characterised by elemental analysis, molar conductivity, mass, IR and 1H NMR spectroscopy.

scholarly journals An Efficient One Pot Synthesis of some New 1,4-Dihydropyridine Derivatives Using Multicomponent Reaction

2015 ◽  
Vol 57 ◽  
pp. 45-50
Author(s):  
Devang R. Prajapati ◽  
Hardik K. Senjani ◽  
Yogesh T. Naliapara
Keyword(s):  
Nmr Spectroscopy ◽  
Multicomponent Reaction ◽  
Elemental Analysis ◽  
One Pot ◽  
H Nmr ◽  
One Pot Synthesis ◽  
Target Molecules ◽  
Dihydropyridine Derivatives ◽  
C Nmr

Synthesize target molecules, multicomponent reaction of 4-(4-aminophenyl) morpholin-3-one with various pyrazole aldehydes and ethylacetoacetate or methylacetoacetate afforded various 1,4-dihydropyridines derivatives. The newly synthesized compounds were characterized by IR, Mass, 1H NMR, 13C NMR spectroscopy and elemental analysis.

One-pot synthesis of two-dimensional multilayered graphitic carbon nanosheets by low-temperature hydrothermal carbonization using the in situ formed copper as a template and catalyst

2020 ◽  
Vol 56 (78) ◽  
pp. 11645-11648
Author(s):  
Huangqing Ye ◽  
Jiahui Chen ◽  
Yougen Hu ◽  
Gang Li ◽  
Xian-Zhu Fu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Hydrothermal Carbonization ◽  
Graphitic Carbon ◽  
Two Dimensional ◽  
One Pot ◽  
Carbon Nanosheets ◽  
One Pot Synthesis

Two-dimensional (2D) multilayered graphitic carbon nanosheets are prepared via a facile, green, and mild method of one-pot hydrothermal carbonization at a temperature below 300 °C.

scholarly journals Regioselective Green Synthesis and Antimicrobial properties of full fused non mixed Heterocyclic Systems

2017 ◽  
Vol 13 (2) ◽  
pp. 6006-6020
Author(s):  
Amira A. El-Sayed ◽  
Maher El-HAshash ◽  
Sameh Rizk
Keyword(s):  
Antimicrobial Activity ◽  
Green Synthesis ◽  
Elemental Analysis ◽  
Spectroscopic Data ◽  
Heterocyclic Compounds ◽  
Antimicrobial Properties ◽  
One Pot ◽  
One Pot Synthesis ◽  
Electrophilic Reagents

One pot synthesis and reaction of triazinthione and triazinohydrazide derivatives with different electrophilic reagents in ordered to synthesis of some interesting non-mixed heterocyclic compounds. Structures of thiazolotriazine, triazolotriazine, pyrimidinyltriazine, and triazinotriazine derivatives were established via spectroscopic data and elemental analysis. The synthesized compounds were screened for their antimicrobial activity.

Identification of active sites and reaction mechanism on low-temperature SCR activity over Cu-SSZ-13 catalysts prepared by different methods

2016 ◽  
Vol 6 (16) ◽  
pp. 6294-6304 ◽  
Author(s):  
Tao Zhang ◽  
Feng Qiu ◽  
Huazhen Chang ◽  
Xiang Li ◽  
Junhua Li
Keyword(s):  
Aqueous Solution ◽  
Reaction Mechanism ◽  
Low Temperature ◽  
Ion Exchange ◽  
Active Sites ◽  
One Pot ◽  
One Pot Synthesis ◽  
Low Temperature Scr

Cu-SSZ-13 catalysts with similar Si/Al and Cu/Al ratios were prepared by aqueous solution ion-exchange (Cu-SSZ-13-I) and one-pot synthesis (Cu-SSZ-13-O) methods.

A Facile One-Pot Synthesis of a Two-Dimensional MoS2/Bi2S3Composite Theranostic Nanosystem for Multi-Modality Tumor Imaging and Therapy

2015 ◽  
Vol 27 (17) ◽  
pp. 2775-2782 ◽  
Author(s):  
Shige Wang ◽  
Xiang Li ◽  
Yu Chen ◽  
Xiaojun Cai ◽  
Heliang Yao ◽  
...  
Keyword(s):  
Tumor Imaging ◽  
Two Dimensional ◽  
One Pot ◽  
One Pot Synthesis

A novel one-dimensional silver cylinder stabilized by mixed 2-mercaptobenzoic acid and ethylenediamine ligands

2012 ◽  
Vol 68 (8) ◽  
pp. m229-m232
Author(s):  
Di Sun ◽  
Zhi-Hao Yan
Keyword(s):  
Three Dimensional ◽  
Van Der Waals Interactions ◽  
Two Dimensional ◽  
Binding Modes ◽  
Supramolecular Framework ◽  
One Pot ◽  
Tetrahedral Geometry ◽  
Coordination Environment ◽  
One Dimensional ◽  
The One

A novel infinite one-dimensional silver cylinder, namely poly[μ-ethylenediamine-μ5-(2-sulfanidylbenzoato)-μ4-(2-sulfanidylbenzoato)-tetrasilver(I)], [Ag4(C7H4O2S)2(C2H8N2)]n, has been synthesized by one-pot reaction of equivalent molar silver nitrate and 2-mercaptobenzoic acid (H2mba) in the presence of ethylenediamine (eda). One Ag atom is located in an AgS2NO four-coordinated tetrahedral geometry, two other Ag atoms are in an AgS2O three-coordinated T-shaped geometry and the fourth Ag atom is in an AgSNO coordination environment. The two mba ligands show two different binding modes. The μ2-N:N′-eda ligand, acting as a bridge, combines with mba ligands to extend the AgIions into a one-dimensional silver cylinder incorporating abundant Ag...Ag interactions ranging from 2.9298 (11) to 3.2165 (13) Å. Interchain N—H...O hydrogen bonds extend the one-dimensional cylinder into an undulating two-dimensional sheet, which is further packed into a three-dimensional supramolecular framework by van der Waals interactions; no π–π interactions were observed in the crystal structure.

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