scholarly journals One-pot four-component reaction for convenient synthesis of functionalized 1-benzamidospiro[indoline-3,4'-pyridines]

2014 ◽  
Vol 10 ◽  
pp. 2671-2676 ◽  
Author(s):  
Chao Wang ◽  
Yan-Hong Jiang ◽  
Chao-Guo Yan
Keyword(s):  
Nmr Spectra ◽  
Ethyl Cyanoacetate ◽  
Base Catalyst ◽  
One Pot ◽  
H Nmr ◽  
Convenient Synthesis ◽  
The One

The one-pot four-component reaction of benzohydrazide (2-picolinohydrazide), acetylenedicarboxylate, isatins and malononitrile (ethyl cyanoacetate) with triethylamine as base catalyst afforded functionalized 1-benzamidospiro[indoline-3,4'-pyridines] in good yields. 1H NMR spectra indicated that an equilibrium of cis/trans-conformations exist in the obtained products.

scholarly journals One-Pot Eco-Safe Saccharin-Catalyzed Procedure for Expedient and Convenient Synthesis of Dihydropyrano[2,3-c]pyrazole, Tetrahydrobenzo[b]pyran and Pyrano[2,3-d]pyrimidinone Scaffolds as a Green and Versatile Catalyst

2018 ◽  
Vol 18 (1) ◽  
pp. 7
Author(s):  
Farzaneh Mohamadpour ◽  
Mojtaba Lashkari ◽  
Nourallah Hazeri
Keyword(s):  
Reaction Times ◽  
Atom Economy ◽  
One Pot ◽  
Convenient Synthesis ◽  
Cyclocondensation Reaction ◽  
The One

A green and facile saccharin-catalyzed procedure is developed for the one-pot convenient synthesis of dihydropyrano[2,3-c]pyrazole, tetrahydrobenzo[b]pyran and pyrano[2,3-d]pyrimidinone scaffolds via multi-component tandem Knoevenagel cyclocondensation reaction. This procedure has the chief advantages of green, inexpensive and readily available catalyst, high atom-economy, high to quantitative yields and the reaction procedure is mild and involves facile workup procedure to obtain the desired products in short reaction times.

One-pot approach to synthesize hyperbranched poly(thiol–ether amine) (hPtEA) through sequential “thiol–ene” and “epoxy–amine” click reactions

2015 ◽  
Vol 6 (39) ◽  
pp. 6946-6954 ◽  
Author(s):  
Jing Yu ◽  
Zhilong Su ◽  
Hongjie Xu ◽  
Xiaodong Ma ◽  
Jie Yin ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
One Pot ◽  
Click Reactions ◽  
H Nmr ◽  
Epoxy Amine ◽  
Hyperbranched Poly

We demonstrated a one-pot approach to synthesize hyperbranched poly(thiol–ether amine) (hPtEA) through sequential “thiol–ene” and “epoxy–amine” click reactions, both of which were well traced using in situ1H-NMR spectra.

scholarly journals A Facile and Catalyst-free Synthesis of Hexahydroacridine-1,8(2H,5H )-dione and Octahydroacridin-10(1H )-yl)thiourea Derivatives: Inter- and Intramolecular Aza-Michael addition

2020 ◽  
Vol 26 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Nader Noroozi Pesyan ◽  
Narmin Akhteh ◽  
Hana Batmani ◽  
Barış Anıl ◽  
Ertan Şahin
Keyword(s):  
Hydroxylamine Hydrochloride ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
One Pot ◽  
Thiourea Derivatives ◽  
H Nmr ◽  
Nmr Spectrometry ◽  
The One ◽  
Convenient Technique ◽  
C Nmr

AbstractAn easy and convenient technique for the one-pot synthesis of novel compounds of hexahydroacridine-1,8(2H,5H)-dione and octahydroacridin-10(1H)-yl) thiourea derivatives has been developed by the reaction of the octahydro-1H-xanthenes with hydroxylamine hydrochloride and thiosemicarbazide in ethylene glycol, which is a green solvent, under mild reaction conditions. IR, 1H NMR, 13C NMR spectrometry, and X-ray diffraction analysis were used to identify the structures of these compounds.

scholarly journals Synthesis of Tert-Octylsalicylaldoxime and Its Application in Extraction of Cu(II)

2021 ◽  
Vol 9 ◽  
Author(s):  
Liqing Li ◽  
Luo Feng ◽  
Chunfa Liao ◽  
Fangxu Li ◽  
Liqin Yang
Keyword(s):  
Elemental Analysis ◽  
Extraction Ability ◽  
One Pot ◽  
H Nmr ◽  
Alkyl Groups ◽  
Ft Ir ◽  
Copper Nickel Alloy ◽  
The One ◽  
Yield And Purity ◽  
C Nmr

The alkyl salicylaldoxime has attracted more and more attention recently due to the complex branched alkyl groups. In this study, a novel alkyl salicylaldoxime, tert-octylsalicylaldoxime, was successfully synthesized by the one-pot method. The yield and purity by the elemental analysis were 96.17 and 94.13%, respectively. The structure was confirmed by elemental analysis, FT-IR, 1H NMR (Nuclear Magnetic Resonance), 13C NMR spectroscopy, and MS. Results showed that tert-octylsalicylaldoxime with a new structure exhibited excellent extraction ability and selectivity for Cu(II) and can be successfully used to recover Cu from copper-nickel alloy electroplating wastewater. Thus, this product has the potential to be used as a powerful copper extractant in the future.

A convenient synthesis of 1-aryl-1H-1,2,3-triazoles from aliphatic substrates

2017 ◽  
Vol 15 (40) ◽  
pp. 8529-8534 ◽  
Author(s):  
Qiang Wang ◽  
Xiaonan Shi ◽  
Xinying Zhang ◽  
Xuesen Fan
Keyword(s):  
Cascade Reactions ◽  
One Pot ◽  
Convenient Synthesis ◽  
The One

A convenient synthesis of 1-aryl-1H-1,2,3-triazoles via the one-pot cascade reactions of alkynes with aliphatic azides and allenic ketones is presented.

scholarly journals Synthesis, pretreatment, and recovery of [TEA][HSO4] ionic liquid for OPEFB lignocellulosic transformation

2020 ◽  
Author(s):  
Muhammad Nurdin ◽  
Haznan Abimanyu ◽  
Hadijah Putriani ◽  
L.O.M. Setiawan ◽  
Maulidiyah Maulidiyah ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lignin Content ◽  
Decomposition Temperature ◽  
Biomass Pretreatment ◽  
Chemical Components ◽  
One Pot ◽  
Empty Fruit Bunches ◽  
H Nmr ◽  
The One ◽  
Chemical Groups

Abstract In recent years, various studies have been utilized lignocellulosic biomass from oil palm empty fruit bunches (OPEFB) to be converted into bioethanol fuels. In this study, we present the techno-economical preparation for biomass pretreatment based on triethylamine hydrogen sulfate ([TEA][HSO4]) ionic liquid. Synthesis, pretreatment, and recovery of [TEA][HSO4] ionic liquid have been carried out via the one-pot method. Based on these results, the synthesized [TEA][HSO4] has been characterized using IR spectroscopy showing the appearance chemical groups such as H, CH3, CN, and SO2. In addition, H-NMR spectroscopy was presenced the CH3CH2- structure towards low ppm. Thermal stability has also demonstrated unique physical properties of ionic liquid (IL) with a melting point of 49°C and a decomposition temperature of 274.3°C. The effectiveness to produce the chemical components shows that the useful use of [TEA][HSO4] was successfully synthesized with an optimum composition of 83% resulting in chemical levels of 45.84% (cellulose), 5.00% (hemicellulose), and 34.40% (lignin). The recovered [TEA][HSO4] with a composition of 90.90% was effective in reducing the lignin content about 80%. These results also depend heavily on the temperature and separation techniques applied during the pretreatment process.

Convenient synthesis of 2,3-disubstituted quinazolin-4(3H)-ones and 2-styryl-3-substituted quinazolin-4(3H)-ones: applications towards the synthesis of drugs

RSC Advances ◽  
2015 ◽  
Vol 5 (39) ◽  
pp. 30819-30825 ◽  
Author(s):  
Dinesh Kumar ◽  
Pradeep S. Jadhavar ◽  
Manesh Nautiyal ◽  
Himanshu Sharma ◽  
Prahlad K. Meena ◽  
...  
Keyword(s):  
Solvent Free ◽  
One Pot ◽  
One Pot Synthesis ◽  
Convenient Synthesis ◽  
Solvent Free Conditions ◽  
The One

Simple, convenient, and green synthetic protocols have been developed for the one pot synthesis of 2,3-disubstituted quinazolin-4(3H)-ones and 2-styryl-3-substituted quinazolin-4(3H)-ones under catalyst and solvent free conditions.

Synthesis, photoinduced amination and topological indices of novel porphyrin dyads

2020 ◽  
Vol 24 (08) ◽  
pp. 1054-1065
Author(s):  
Muhammad Yaseen ◽  
Muhammad A. Rashid ◽  
Muhammad A. Iqbal ◽  
Zahid Farooq ◽  
Muhammad Idrees ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Transition Metal ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Topological Indices ◽  
Operational Cost ◽  
One Pot ◽  
H Nmr ◽  
Metal Catalyzed ◽  
The One

Transition-metal-catalyzed homo and hetero coupling is a rapidly growing area of research. This work refers to the nickel-catalyzed photoinduced amination study of [Formula: see text]-bromotetraarylporphyrin and its Ni(II), Zn(II) and Cu(II) complexes. The selective mono [Formula: see text]-bromination of 5,10,15,20-tetrakis(4[Formula: see text]-isopropylphenyl)porphyrin was achieved with [Formula: see text]-bromosuccinimide. Under similar conditions, [Formula: see text]-bromination of Ni(II), Zn(II) and Cu(II) complexes of 5,10,15,20-tetrakis(4[Formula: see text]-isopropylphenyl)porphyrin successfully afforded the corresponding 2-bromometalloporphyrins. The [Formula: see text]-bromoporphyrin/metalloporphyrins were coupled with three different amines through the creation of the C–N bond by using an economical and air-tolerant photoactive catalyst (NiBr[Formula: see text] · 3H2O) at room temperature under 365 nm radiations. Nickel-catalyzed amination yields are compared with the traditional Buchwald–Hartwig amination yields. Due to the low operational cost, photoinduced nickel-catalyzed C–N couplings were found to be more economical than the Buchwald–Hartwig amination procedure, although the latter afforded higher yields. The nickel-catalyzed photoamination reaction was also extended for the one-pot synthesis of pyridine-3,5-diamine bridged porphyrin dyad. The intramolecular cyclization of the pyridine-3,5-diamine-bridged porphyrin dyad afforded a novel quinolino-fused porphyrin dyad. Degree- and distance-based topological indices of the newly synthesized porphyrins were calculated and correlated with their molar refractivity. All newly synthesized porphyrins are characterized by UV-vis, FTIR, 1H NMR, elemental analysis and mass spectrometry.

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