scholarly journals Synthesis of N –sulfamethoxazolederivative imide on polymeric chain

2014 ◽  
Vol 11 (4) ◽  
pp. 1567-1576
Author(s):  
Baghdad Science Journal
Keyword(s):  
Melting Point ◽  
Physical Properties ◽  
13C Nmr ◽  
Acid Chloride ◽  
Uv Spectroscopy ◽  
Second Step ◽  
Polymeric Chain ◽  
Acryloyl Chloride ◽  
Prepared Compound ◽  
Ft Ir

The present work involved synthesis of several new N-Sulfamethoxazol derivatives imide on Polymeric chain by two steps. The first stip involved preparation of N- (sub.orunsub benzoyl and sub unsub acetyl) amidyl sub sulfamethoxazole (1-5) by condensation of sulfamethoxazole drug with many substituted acid chloride, then the second step include, preparation new five N-(acrly-N–sub or unsub benzoyl) imidyl substituted sulfamethoxazol(6-10) by reaction of poly acryloyl chloride with the prepared compound (1-5) in first stepin asuitable solvent in the presenceamount triethylamine (Et3N) with heating. The structure confirmations of all polymers wereconfirmed using FT-IR,1H-NMR,13C-NMR and UV spectroscopy. Other physical properties including softeningpoint's, melting point, and solubility of the polymers were also measured.

scholarly journals Synthesis of new Polyimides Derived from 4- minoantipyrine

2016 ◽  
Vol 13 (4) ◽  
pp. 782-792
Author(s):  
Baghdad Science Journal
Keyword(s):  
Melting Point ◽  
Nmr Spectroscopy ◽  
Physical Properties ◽  
13C Nmr ◽  
Acid Chloride ◽  
Softening Point ◽  
13C Nmr Spectroscopy ◽  
Acryloyl Chloride ◽  
One Step ◽  
Ft Ir

In the present study, new five polymers of acryloyl chloride have been synthesized by reaction 4-aminoantipyrine with many substituted acid chloride (A-E). Then condensation of polyacryloyl chloride with the product in one step (A-E), in a suitable solvent in the presence amount of (Et3N) to obtain new polyimides(A1-E5). The prepared compounds were characterized by UV. FT-IR, 1H-NMR and 13C-NMR spectroscopy and measuring of other physical properties such as softening point, melting point and solublities.

scholarly journals Synthesis of N-benzothiazole derivative imide on polymeric chain, have possible biological activity

2013 ◽  
Vol 10 (3) ◽  
pp. 673-685
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thermal Analysis ◽  
Biological Activity ◽  
Melting Point ◽  
13C Nmr ◽  
Uv Spectroscopy ◽  
Polymeric Chain ◽  
Thermal Stabilities ◽  
Triethyl Amine ◽  
Ft Ir ◽  
Structure Confirmation

In this reserch Some new substituted and unsubstituted poly imides compounds. were synthesized by reaction of acrylol chloride with different amides (aliphatic and aromatic) in a suitable solvent in the presence amount triethyl amine (Et3N) with heating. The Structure confirmation of all polymers were confirmed using FT-IR,1H-NMR,13C-NMR and UV spectroscopy. Thermal analysis (TG) for some polymers showed their thermal stabilities. Other physical properties including softening points, melting point and solubility of the polymers were also measured

scholarly journals Synthesis, Characterization of Derivatives Tetrazoles for Trimethoprim Drug

2016 ◽  
Vol 13 (2) ◽  
pp. 266-274
Author(s):  
Baghdad Science Journal
Keyword(s):  
Nmr Spectroscopy ◽  
Physical Properties ◽  
Schiff Bases ◽  
1H Nmr ◽  
13C Nmr ◽  
1H Nmr Spectroscopy ◽  
Second Step ◽  
Direct Reaction ◽  
Ft Ir

The present work involved synthesis of serval new substituted tetrazole via Schiff bases for trimethoprim drug by two steps. The first step involved direct reaction of different ketones and aldehydes with trimethoprim producing the corresponding Schiff bases (1-10), whereas the second step, involved preparation new tetrazoles derivatives (11-20) through reaction of the ready Schiff bases (in the first step) with sodium azidein in dioxin. The prepared compounds were characterized by UV, FT-IR, and some of them by 13C-NMR, 1H-NMR spectroscopy and physical properties.

scholarly journals Quinazolin-4(3H)-ones and 5,6-Dihydropyrimidin-4(3H)-ones from β-Aminoamides and Orthoesters

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2925 ◽  
Author(s):  
Joshua Gavin ◽  
Joel Annor-Gyamfi ◽  
Richard Bunce
Keyword(s):  
Acetic Acid ◽  
Melting Point ◽  
1H Nmr ◽  
13C Nmr ◽  
Pressure Tube ◽  
Absolute Ethanol ◽  
Basic Nitrogen ◽  
One Step ◽  
Ft Ir

Quinazolin-4(3H)-ones have been prepared in one step from 2-aminobenzamides and orthoesters in the presence of acetic acid. Simple 2-aminobenzamides were easily converted to the heterocycles by refluxing in absolute ethanol with 1.5 equivalents of the orthoester and 2 equivalents of acetic acid for 12–24 h. Ring-substituted and hindered 2-aminobenzamides as well as cases incorporating an additional basic nitrogen required pressure tube conditions with 3 equivalents each of the orthoester and acetic acid in ethanol at 110 °C for 12–72 h. The reaction was tolerant towards functionality on the benzamide and a range of structures was accessible. Workup involved removal of the solvent under vacuum and either recrystallization from ethanol or trituration with ether-pentane. Several 5,6-dihydropyrimidin-4(3H)-ones were also prepared from 3-amino-2,2-dimethylpropionamide. All products were characterized by melting point, FT-IR, 1H-NMR, 13C-NMR, and HRMS.

scholarly journals Biodegradable Oligoesters of ε-Caprolactone and 5-Hydroxymethyl-2-Furancarboxylic Acid Synthesized by Immobilized Lipases

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1402 ◽  
Author(s):  
Todea ◽  
Bîtcan ◽  
Aparaschivei ◽  
Păușescu ◽  
Badea ◽  
...  
Keyword(s):  
Melting Point ◽  
Raw Materials ◽  
Polymeric Chain ◽  
Chemical Route ◽  
Renewable Raw Materials ◽  
Immobilized Lipases ◽  
Polymeric Compounds ◽  
Ft Ir ◽  
Candida Antarctica B ◽  
Heterocyclic Structure

Following the latest developments, bio-based polyesters, obtained from renewable raw materials, mainly carbohydrates, can be competitive for the fossil-based equivalents in various industries. In particular, the furan containing monomers are valuable alternatives for the synthesis of various new biomaterials, applicable in food additive, pharmaceutical and medical field. The utilization of lipases as biocatalysts for the synthesis of such polymeric compounds can overcome the disadvantages of high temperatures and metal catalysts, used by the chemical route. In this work, the enzymatic synthesis of new copolymers of ε-caprolactone and 5-hydroxymethyl-2-furancarboxylic acid has been investigated, using commercially available immobilized lipases from Candida antarctica B. The reactions were carried out in solvent-less systems, at temperatures up to 80 °C. The structural analysis by MALDI TOF-MS, NMR, and FT-IR spectroscopy confirmed the formation of cyclic and linear oligoesters, with maximal polymerization degree of 24 and narrow molecular weight distribution (dispersity about 1.1). The operational stability of the biocatalyst was explored during several reuses, while thermal analysis (TG and DSC) indicated a lower thermal stability and higher melting point of the new products, compared to the poly(ε-caprolactone) homopolymer. The presence of the heterocyclic structure in the polymeric chain has promoted both the lipase-catalyzed degradation and the microbial degradation. Although, poly(ε-caprolactone) is a valuable biocompatible polymer with important therapeutic applications, some drawbacks such as low hydrophilicity, low melting point, and relatively slow biodegradability impeded its extensive utilization. In this regard the newly synthesized furan-based oligoesters could represent a “green” improvement route.

scholarly journals Synthesis and Characterization of New Polyimide by Curing Poly Acryloyl Chloride with Different Amides

2013 ◽  
Vol 10 (3) ◽  
pp. 686-698
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thermal Analysis ◽  
Uv Spectroscopy ◽  
Synthesis And Characterization ◽  
Acryloyl Chloride ◽  
Melting Points ◽  
Thermal Stabilities ◽  
Ft Ir ◽  
Ethyl Amine ◽  
Structure Confirmation

The present work involved preparation of new substituted and unsubstituted and poly imides (1-17) using reaction of acryloyl chloride with different amides (aliphatic ,aromatic) in the presence of a suitable solvent and amount tri ethyl amine (Et3N) with heating – the structure confirmation of all polymers were proved using FT-IR,1H-NMR,C13NMR and UV spectroscopy ,thermal analysis (TG) for some polymers confirmed their thermal stabilities . Other physical properties including softening and melting points, PH and solubility of the polymers were also measured

scholarly journals Synthesis of Polyimides derived from 2,6-diamino-4-methyl-1,3,5-triazine

2016 ◽  
Vol 13 (2) ◽  
pp. 196-209
Author(s):  
Baghdad Science Journal
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Second Step ◽  
Acid Chlorides ◽  
Triethyl Amine ◽  
Ft Ir

This work included synthesis of several new polymers of polyacryloyl chloride in two steps . The first step the included the reaction of N-( sub. or un sub. benzoyl and sub. or un sub. acetyl ) amidyl sub. 2,6- diamino -4-methyl-1,3,5-triazine (1-5) by condensation of many substituted acid chlorides with 2,6- diamino -4-methyl-1,3,5-triazine . While the second step included the reaction of polyacryloyl chloride with the produced compounds (1-5) in step (1) in the presence amount triethyl amine (Et3N) to obtain new polyimides (6-10). The prepared compounds were characterized by UV. , FT-IR, and some of them by 1H-NMR and 13C- NMR spectroscopy.

Highly effective synthesis of dibromide of (+)-(1R, 2R)-and (-)-(1S, 2S) -1,2- diphenyl-1,2-ethylenediammonium (DPEN∙2HBr) assisted by microwave

2020 ◽  
Vol 07 ◽  
Author(s):  
Jeyson Andrés Cortés Mitte ◽  
Andrés Felipe Ojeda Delgado ◽  
Luis Alberto Lenis Velásquez
Keyword(s):  
Melting Point ◽  
Microwave Heating ◽  
13C Nmr ◽  
Optical Resolution ◽  
Conventional Heating ◽  
1H And 13C Nmr ◽  
Highly Effective ◽  
Effective Synthesis ◽  
Ft Ir ◽  
Optical Rotations

Abstract:: In this work, the chiral salts (R,R)- and (S,S)-dibromide of 1,2-diphenyl-1,2-ethylenediammonium (R,R)-9 and (S,S)-9 were synthesized, both by conventional and microwave heating, obtaining yields and optical rotations (c 0.43, H2O) of 92%, +17.48° and 90%, -17.50°, respectively (conventional heating by 24 h) and 92%, +17.52° and 89%, -17.44°, respectively (microwave heating by 1.4 h). These compounds were synthesized by means of the racemic intermediate (±)- iso-amarine (±)-6, leading to the separation of their enantiomers, by fractional optical resolution and using as resolution agents the enantiomers of (+)-(S)- and (-)-(R)-MA 3. The starting reagents were benzaldehyde and 28-30% NH4OH, which are economical and commercially affordable. All synthesized compounds were characterized by melting point, solubility, UV-vis, FT-IR (ATR). Imidazoline (±)-6 and salts (R,R)-9 and (S,S)-9 were additionally characterized by 1H and 13C NMR. Polarimetry was determined to (R,R)-(+)-6, (S,S)-(-)-6, (S,R,R)-(+)-7, (R,S,S)-(-)-7, (S,S)-(+)-8, (R,R)-(-)-8, (R,R)-(+)-9 and (S,S)-(-)-9 compounds.

scholarly journals Synthesis of new poly diimides from reaction of poly acryloyl chloride and diamides.

2009 ◽  
Vol 6 (4) ◽  
pp. 738-747 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Physical Properties ◽  
Second Step ◽  
Acryloyl Chloride

Five N-substituted poly diimides were prepared by two steps. First step was included the preparation of five N-substituted diamides by reaction of adipoyl chloride with different amines .The second step was involved reaction of diamides with poly acryloyl chloride to obtain five new poly diimides having different physical properties which may used in different applications.

Chemical and Physical Properties of FSC Cigarette Papers and Physical Properties of the Cigarettes They Were Taken From: Results From a Small Product Survey of Cigarette Brand-Styles Sold in the USA

2018 ◽  
Author(s):  
John Lauterbach
Keyword(s):  
Physical Properties ◽  
Cigarette Brand ◽  
The Usa ◽  
Physical Tests ◽  
Ft Ir ◽  
Small Product

We undertook a small product survey in which we purchased a range of brand-styles at retail and sent them to commercial laboratories for dimensional and physical tests, including banded and nonbanded area porosities. Other analyses obtained used chemical, chromatographic, and spectrophotometric (FT-IR) techniques to identify main banding agents and additives used with them. One finding from this study was at least at the time the samples were collected, some companies used just one FSC paper for all products while others used multiple FSC papers.<br>

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