Synthesis of oligotetramethylene oxides with terminal amino groups as curing agents for an epoxyurethane oligomer

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Alexey Slobodinyuk ◽  
Vladimir Strelnikov ◽  
Dmitriy Kiselkov ◽  
Daria Slobodinyuk
Keyword(s):  
High Pressure ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Molecular Mass ◽  
Elemental Analysis ◽  
Amino Groups ◽  
Average Molecular Mass ◽  
Terminal Amino ◽  
Curing Agents ◽  
C Nmr

Abstract A method for the synthesis of oligotetramethylene oxides with terminal amino groups is presented. Its use as a hardener for urethane-containing oligomers has been demonstrated. The diamines were synthesized by a two-stage method based on oligotetramethylene oxide diol. The compounds can be used for the production of non-toxic, biocompatible and biodegradable segmented urethane-containing elastomers. The oligotetramethylene oxide diol with an average molecular mass of 1008 was chosen as a typical precursor component. Its dibromide was formed using a quasi-phosphonium reagent in various solvents. The corresponding amine was obtained by high-pressure amination. The compounds have been identified by 1H and 13C NMR spectroscopy, IR spectroscopy, and elemental analysis.

[Zn(phen)2(CX3COO)]+, X = H orCl; Influence of X on the Coordination Mode of the Carboxylate Group (phen = 1,10-Phenanthroline)

2005 ◽  
Vol 60 (10) ◽  
pp. 1049-1053 ◽  
Author(s):  
Zeanab Talaei ◽  
Ali Morsali ◽  
Ali R. Mahjoub
Keyword(s):  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Coordination Mode ◽  
Bidentate Ligand ◽  
Carboxylate Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
H Nmr ◽  
Coordinate Geometry ◽  
C Nmr

Two new ZnII(phen)2 complexes with trichloroacetate and acetate anions, [Zn(phen)2(CCl3COO)- (H2O)](ClO4) and [Zn(phen)2(CH3COO)](ClO4), have been synthesized and characterized by elemental analysis, IR, 1H NMR, 13C NMR spectroscopy. The single crystal X-ray data of these compounds show the Zn atoms to have six-coordinate geometry. From IR spectra and X-ray crystallography it is established that the coordination of the COO− group is different for trichloroacetate and acetate. The former acts as a monodentate whereas the latter acts as a bidentate ligand.

Synthesis and Pharmacological Activities of Some New 2-[1-Heptyl-3-(4- methoxybenzyl)-5-oxo-1,5-dihydro-4H-1,2,4-triazol-4-yl]acetohydrazide Derivatives

2014 ◽  
Vol 69 (9-10) ◽  
pp. 969-981 ◽  
Author(s):  
Olcay Bekircan ◽  
Emre Mentese ◽  
Serdar Ulker
Keyword(s):  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Lipase Activity ◽  
Spectral Studies ◽  
Antituberculosis Activity ◽  
Pharmacological Activities ◽  
Mass Spectral ◽  
H Nmr ◽  
Acetohydrazide Derivative ◽  
C Nmr

Abstract In the present investigation, the key intermediate acetohydrazide derivative 5 was synthesized starting from 3-(4-methoxybenzyl)-4-amino-4,5-dihydro-1,2,4-triazol-5-one (1) by a four-step reaction. Thiosemicarbazides 6a-f and arylidenehydrazide derivatives 8a-d were obtained from compound 5. The cyclization of compounds 6a-f in the presence of NaOH resulted in the formation of compounds 7a-f. The compounds were characterized by IR, 1H NMR, 13C NMR spectroscopy, elemental analysis and mass spectral studies. The compounds were tested for their anti-lipase, anti-α-glucosidase and anti-mycobacterial activities. Compounds 6b and 8c exhibited excellent anti-lipase activity, and compound 8d showed excellent anti-a-glucosidase activity. Compounds 3 and 4 exhibited good antituberculosis activity

scholarly journals Synthesis and Single Crystal X-Ray Structure of Bis[4-oxo-3- (2-ethoxycarbonylphenyl)-3,4-dihydroquinazolin-2-yl]disulfide

2009 ◽  
Vol 64 (9) ◽  
pp. 1065-1069 ◽  
Author(s):  
Mehdi Rimaz ◽  
Jabbar Khalafy ◽  
Khadijeh Tavana ◽  
Katarzyna Ślepokura ◽  
Tadeusz Lis ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Structure Determination ◽  
Room Temperature ◽  
Sodium Ethoxide ◽  
Reaction Conditions ◽  
X Ray ◽  
Ethyl Nitroacetate ◽  
C Nmr

Diethyl 2,2´-thiocarbonyl-bis(azanediyl)dibenzoate was synthesized from the reaction of ethyl anthranilate with thiophosgene. Its treatment with sodium ethoxide in ethanol at room temperature gave ethyl 2-(4-oxo-2-thioxo-1,2-dihydroquinazolin-3(4H)-yl) benzoate, whereas in the presence of ethyl nitroacetate and under the same reaction conditions, the corresponding bis(quinazolin)disulfide was formed. Its structure was confirmed by IR, 1H and 13C NMR spectroscopy elemental analysis and single crystal X-ray structure determination.

scholarly journals Synthesis of cis, cis-1,3,5-trisubstituted cyclohexane based chelators with polyfunctional pendant arms

2005 ◽  
Vol 2005 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Minati Baral ◽  
B.K. Kanungo ◽  
Peter Moore
Keyword(s):  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Organic Compounds ◽  
Elemental Analysis ◽  
H Nmr ◽  
Benzenetricarboxylic Acid ◽  
New Compounds ◽  
Pendant Arms ◽  
C Nmr

Some novel organic compounds of the type: cis, cis-1,3,5-tris(X)cyclohexane, where X= –CONH(CH2)2NH2, –CONH(CH2)3NH2, –CONH(CH2)2NCH –C6H4OH, CONH(CH2)3NCHC6H4OH, which are expected to function as potential polydentate chelators have been synthesised from 1,3,5-benzenetricarboxylic acid through multi-steps reactions. 1,3,5-benzenetricarboxylic acid was reduced to cis, cis-1,3,5-tris(ethylcarboxylate)cyclohexane, which on reaction with excess of 1,2-diaminoethane and 1,2-diaminopropane afforded two new compounds. Condensation of the obtained derivatives with three equivalents of salicylaldehyde resulted the formation of two new Schiff base compounds. All the compounds were characterised by a combination of elemental analysis, mass, IR, UV-Vis, 1H NMR and 13C NMR spectroscopy.

SYNTHESIS AND PROPERTIES OF INTERACTION PRODUCTS OF TRIS[TRI(BUTOXY)TITANATE]BORON AND ALIPHATIC FLUORINATED ALCOHOLS

2018 ◽  
Vol 59 (1) ◽  
pp. 75 ◽  
Author(s):  
N.Ya. Kuzmenko ◽  
S.N. Kuzmenko ◽  
O.V. Skrinnik ◽  
V.V. Bugrym
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Mass ◽  
1H Nmr ◽  
Elemental Analysis ◽  
1H Nmr Spectroscopy ◽  
Alkoxy Group ◽  
Partial Substitution ◽  
Fluorinated Alcohols ◽  
Analysis Determination

Synthesis and properties of products based on tris[[tri(butoxy)titanate]boron with complete or partial substitution of butoxy groups linked with titanium by fluorinated alkoxy group were described. Extracted products were liquid or solid substances which are high soluble in aliphatic-, aromatic- chloraromatic- and chlorinated hydrocarbons, low alcohols, and ketone. Their structure was confirmed by elemental analysis, determination of molecular mass, IR and 1H NMR spectroscopy.

The characterization of clay-organic systems

Clay Minerals ◽  
1982 ◽  
Vol 18 (4) ◽  
pp. 357-371 ◽  
Author(s):  
D. T. B. Tennakoon ◽  
R. Schlögl ◽  
T. Rayment ◽  
J. Klinowski ◽  
W. Jones ◽  
...  
Keyword(s):  
High Pressure ◽  
Nmr Spectroscopy ◽  
Catalytic Properties ◽  
Clear Distinction ◽  
Organic Systems ◽  
Catalytically Active ◽  
Natural Clays ◽  
Temperature Controlled ◽  
C Nmr

AbstractThe importance of a number of techniques (including1H and13C NMR, XRD and IR) in exploring the important catalytic properties of synthetic and natural clays is described. A clear distinction is observed between proven catalytically-active clays (e.g. Al-exchanged) and those which are generally less effective (e.g. Na-exchanged).13C NMR spectroscopy is used to identify directly products formed within the interlayer regions, and temperature-controlled powder XRD serves as a useful tool for identifying whether or not intercalation occurs under variously defined conditions. High-pressure XRD is used to verify the formation of different products during reaction.

scholarly journals Synthesis and Photophysical and Electrochemical Properties of Functionalized Mono-, Bis-, and Trisanthracenyl Bridged Ru(II) Bis(2,2′:6′,2″-terpyridine) Charge Transfer Complexes

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Adewale O. Adeloye ◽  
Peter A. Ajibade
Keyword(s):  
Charge Transfer ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Electrochemical Techniques ◽  
Visible Region ◽  
Charge Transfer Complexes ◽  
Cyclic Voltammograms ◽  
Butenoic Acid ◽  
Ft Ir ◽  
C Nmr

With the aim of developing new molecular devices having long-range electron transfer in artificial systems and as photosensitizers, a series of homoleptic ruthenium(II) bisterpyridine complexes bearing one to three anthracenyl units sandwiched between terpyridine and 2-methyl-2-butenoic acid group are synthesized and characterized. The complexes formulated as bis-4′-(9-monoanthracenyl-10-(2-methyl-2-butenoic acid) terpyridyl) ruthenium(II) bis(hexafluorophosphate) (RBT1), bis-4′-(9-dianthracenyl-10-(2-methyl-2-butenoic acid) terpyridyl) ruthenium(II) bis(hexafluorophosphate) (RBT2), and bis-4′-(9-trianthracenyl-10-(2-methyl-2-butenoic acid) terpyridyl) ruthenium(II) bis(hexafluorophosphate) (RBT3) were characterized by elemental analysis, FT-IR, UV-Vis, photoluminescence,1H and13C NMR spectroscopy, and electrochemical techniques by elemental analysis, FT-IR, UV-Vis, photoluminescence,1H and13C NMR spectroscopy, and electrochemical techniques. The cyclic voltammograms (CVs) of (RBT1), (RBT2), and (RBT3) display reversible one-electron oxidation processes atE1/2= 1.13 V, 0.71 V, and 0.99 V, respectively (versus Ag/AgCl). Based on a general linear correlation between increase in the length ofπ-conjugation bond and the molar extinction coefficients, the Ru(II) bisterpyridyl complexes show characteristic broad and intense metal-to-ligand charge transfer (MLCT) band absorption transitions between 480–600 nm,ε=9.45×103 M−1 cm−1, and appreciable photoluminescence spanning the visible region.

Crystal Structures and Properties of High-nitrogen Energetic Salts Based on (Z)-1,1-diamino-2-nitro-2-(1H-tetrazol-5-yl)ethene

2021 ◽  
Author(s):  
Zhaoyang Yin ◽  
Yaqun Dong ◽  
Zhiwei Zeng ◽  
Wei Huang ◽  
Yongxing Tang
Keyword(s):  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Crystal Structures ◽  
Elemental Analysis ◽  
High Nitrogen ◽  
Structures And Properties ◽  
Energetic Salts

Three energetic salts (2, 3, 5) based on (Z)-1,1-diamino-2-nitro-2-(1H-tetrazol-5-yl)ethene (1) were designed and prepared. All of them were fully characterized by NMR spectroscopy, IR spectroscopy, and elemental analysis. The structures...

scholarly journals Unprecedented Photoinduced Insertion Reactions of N-methyl-1,2-naphthalenedicarboximide with Phenylacetylene

2007 ◽  
Vol 2007 (8) ◽  
pp. 437-438 ◽  
Author(s):  
Qingjian Liu
Keyword(s):  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Elemental Analysis ◽  
Crystallographic Analysis ◽  
Insertion Reactions ◽  
X Ray

Irradiation of N-methyl-1,2-naphthalendicarboximide 1 together with phenylacetylene in benzene afforded unprecedented reductive insertion products dihydronaphthazepinediones 2a and 2b, which were characterised by NMR spectroscopy (1H, 13C), IR spectroscopy, MS, elemental analysis and assignments confirmed by X-ray crystallographic analysis.

SYNTHESIS AND STUDY OF THE NEMATOCIDAL ACTIVITY OF 1,2,4-TRIAZOLO-1,2,4-TRIAZOLES

2020 ◽  
Vol 54 (1 (251)) ◽  
pp. 3-11
Author(s):  
M.A. Samvelyan ◽  
T.V. Ghochikyan ◽  
T.H. Yeganyan ◽  
M. Sarfraz ◽  
C. Jakob
Keyword(s):  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Thioglycolic Acid ◽  
Ethyl Esters ◽  
Steinernema Feltiae ◽  
Acid Basis ◽  
Biological Studies ◽  
Nematocidal Activity ◽  
C Nmr

The method has been developed for the preparation of ethyl esters of triazolo-substituted thioglycolic acid, basis on which the corresponding hydrazides, thiosemicarbazides and 1,2,4-triazolo-1,2,4-triazoles were synthesized by successive transformations. By the data of $ ^{1} \mathrm{H} $ and $ ^{13} \mathrm{C} $ NMR spectroscopy and elemental analysis have been established the structures of obtained compounds. Biological studies have shown that triazolo-triazoles at concentrations of 50 and 100 $ \mu m/mL $ reduce the viability of nematodes Steinernema Feltiae by 10–40%.

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