Synthesis,structure, and spectral properties of some bioxazoles

Syntheses of systems containing two oxazole rings [2-phenyl-, 2-(2-furyl)-, and 2-(2-thienyl)-2,5-bioxazoles, and 2,2-(2,5-furylene)bisoxazole] from aldehydes obtained by formylating 2-phenyl-, 2-(2-furyl)-, and 2-(2-thienyl)oxazole have been developed. Terephthalate and thiophen-2,5-dicarboxylate esters have been used to obtain 2,2-(1,4-phenylene)- and 2,2-(2,5-thienylene)bisoxazoles. The PMR, UV, and luminescence spectra of these systems have been examined, and quantum chemical calculations carried out in the PPP approximation.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 826–836, June, 1986.     

十八烷基取代吲哚啉螺吡喃衍生物的合成及光谱性质

本文合成了十种新的十八烷基取代的吲哚螺吡喃衍生物,拟进一步研究这类化合物在LB膜中的光致变色性质.     

Synthesis and spectral properties of hexafluoroaurates

It is established that krypton difluoride (KrF₂) interacts with metallic gold in anhydrous hydrogen fluoride (HF) in the presence of alkaline and alkaline-earth metal fluorides with the formation of complex hexafluoroaurates with the general formula M^IAu^VF₆ (M^I = Li, Na, K, Rb, Cs) and bis-hexafluoroaurates M^II(Au^VF₆)₂ (M^II = Mg, Ca, Sr, Ba). As a result of the subsequent interaction of bis-hexafluoroaurates with krypton difluoride, new coordination compounds with the composition M^II(Au^VF₆)₂ · nKrF₂ (M^II = Ca, Sr, Ba; n = 0–4) were synthesized. The Raman spectra were studied and a comparative analysis of the Raman spectra of the obtained compounds was performed. The possible variants of the structural transformation of the AuF ₆ ^? anions in compounds and the position and character of the chemical bond of the “guest” (KrF₂) in these compounds are discussed.     

Synthesis and spectral properties of mixedmeso-metallocenylporphyrins

A series of mixed porphyrins with different numbers of metallocenyl (ferrocenyl and cymantrenyl) and aryl (Ph and C₆F₅) groups at themeso-positions was obtained and characterized by¹H NMR, electronic absorption, and mass spectra. The downfield shift of NH signals as well as the bathochromic shift ofQ-bands can be attributed to a distortion of the porphyrin macrocycle upon the introduction of bulkymeso-substituents. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1045–1049, May, 1998.     

Synthesis and acid-base and thermochromic properties of 5-(2-thiazolyl)-substituted formazans

As compared with benzothiazolylformazans, the thiazole ring of synthesized 5-substituted thiazolylformazans weakens their acidic properties and decreases their tendency to form intramolecular hydrogen bonds. The thiazolylformazans have positive red-blue thermochromism. Their IR and UV spectra are presented.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 460–463, April, 1977.     

Synthesis and spectral properties of some 1,2-dithienylethenes and 1-thieny1-4-phenylbutadienes

A total of seven thiophene derivatives not previously reported have been prepared via the Knoevenagel condensation of an activated methylthiophene and a heterocyclic or aromatic aldehyde. The principal peaks in the ultraviolet and visible absorption spectra as well as some nuclear magnetic resonance data are reported for these compounds.     

o-Cyclohexadiamine complexes of some diorganotin,mono-organtotin and stannic carboxylates: Synthesis and spectral properties

o-Cyclohexadiamine (the base component of tetraplatin) adducts of Ph₂Sn(OCOCH₃)₂, nBu₂Sn(OCOH₃)₂, (PhCH₂)₂Sn(OCOCH₃)₂, PhSn(OCOCF₃)₃, BuSn(OCOCH₃)₃ and Sn(OCOCH₃)₄ have been synthesized and characterized by elemental analysis and spectroscopy. The compounds appear to be the first such adducts in their class.     

Synthesis and spectral properties of novel iminophosphoranes

Three new iminophosphoranes coded as FPZ1 (Ph–C≡C–C₆H₄–N = PPh₃), FPZ2 (Ph–N = P(C₆H₄–C≡C–Ph)₃) and FPZ3 (Ph–C≡C–C₆H₄–N = P(C₆H₄–C≡C–Ph)₃) were designed and synthesized by introducing different numbers of phenylene acetylene units to FPZ0 (Ph–N = PPh₃). The effect of structural modification was studied in detail analyzing the absorption spectra, the emission spectra, and the distributions of the electron density. The absorption spectra of the new iminophosphoranes are shown to be a linear combination of the spectra of each part by the artificial combinatorial absorption spectrum, which coincides with the real one. Most probably the individual parts can’t conjugate due to the tetrahedral structure. The probably formed excimer of FPZ0 and FPZ1 causes in their solid emission spectra an obvious bathochromic shift as compared to that of FPZ2 and FPZ3. The melting point data also showed that long branches of FPZ2 and FPZ3 will attenuate the interactions between the molecules. The results of quantum chemical calculations show that the electronic density in the HOMO of FPZ1, FPZ2, and FPZ3 is delocalized over the iminoaryl moieties. The electron density in the LUMO is delocalized over the triaryl phosphine moieties, but only concentrated on two branches, which directly determines the main direction of intramolecular charge transfer.     

香豆素酰胺类化合物的合成及光谱特性

用(取代)香豆素-3-甲酰氯(Ⅰa～Ⅰc)和取代2-氨基苯并噻唑(Ⅱa～Ⅱd)作用合成了12种新的目标化合物(Ⅲa～Ⅲl),用HRMS、IR、1H NMR对化合物结构进行了表征,确定了化合物的结构,并对其紫外吸收光谱和荧光光谱进行了分析。研究发现:在紫外光谱中,新化合物(Ⅲa～Ⅲl)和原料化合物(Ⅰa～Ⅰc)相比,因共轭链的增长而使其最大吸收波长(λmax)红移;12种化合物表现出比原料化合物(Ⅰa～Ⅰc)较强的荧光性能。     

Synthesis and spectral properties of cyclopropyl-substituted phosphaalkenes

Cyclopropanecarboxylic acid chlorides5a-d react with tris(trimethylsilyl)phosphane6 in benzene at –2 °C to form cyclopropylcarbonyl-bis(trimethylsilyl)phosphanes7. These products undergo silylic rearrangement at 25 °C to yield phosphaalkenes8. Compounds 8a,b,d are formed as mixtures ofZ- andE-isomers where the latter predominate. In the case of8c, theZ-isomer is formed exclusively.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 684–689, April, 1994.The authors are grateful to the Fonds der Chemischen Industrie (Germany) for financial support of this work. A. B. Kostitsyn is also grateful to the Deutscher Akademischer Austauschdienst for a grant to carry out this study. For a preliminary communicationcf. Ref. 1.     

Synthesis and spectral properties of phthalimidines and phthalides

Alkaline hydrolysis of substituted 2-cyanocinnamic acids leads to the corresponding substituted 3-carboxymethylpthalimidines; acid hydrolysis of the same acids results in the formation of phthalides with an analogous structure. NMR and mass spectrometric data are examined critically.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 472–476, April, 1992.     

5,15-diaminotetrabenzoporphyrins: Synthesis and spectral properties

A zinc complex of 5,15-di(N-phthalimidyl)tetrabenzoporphyrin was obtained by the reaction of Ncarboxymethylphthalimide with 1-oxo-1H-3-(1-oxoisoindolin-3-ylidenemethyl)isoindole and zinc oxide. The complex demetallation affords 5,15-di(N-phthalimidyl)tetrabenzoporphyrin. The reaction of N-phthalimidylsubstituted tetrabenzoporphyrins with hydrazine hydrate leads to the formation of 5,15-diaminotetrabenzoporphyrins. Spectral properties of these compounds were studied.     

Synthesis and properties of some polyesterimides

New polyesterimides have been obtained by condensation of pyromellitic dianhydride with various aromatic diamines and by esterifying, before the actual dehydration, some carboxyl groups of polyamic acid with 4,4′bis (2-hydroxyethoxy) dinaphthyl 1,1′. Some new polyesterimides containing polynaphthalene rings in the side chain have thus been obtained. Thermal properties of the new polymers were studied by thermogravimetric analysis. Investigations were carried out by determining the decomposition temperatures and measuring the weight losses on heating polymer samples under atmospheric conditions in the presence of air. The influence of the structure of the polymers on their properties was investigated.     

Synthesis and some properties of quinazolylformazans

Some previously undescribed N-quinazolylformazans were synthesized, and some of their properties were studied. The absorption spectra of the formazans and their ions are discussed. The compositions of complexes of the formazans with Ni²⁺ and their instability constants were determined.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 709–712, May, 1976.     

Synthesis and properties of some aryl-s-triazines

The synthesis and reactions of several substituted s-triazines were studied in attempts to prepare 4,6-bis(4-chlorophenyl)-s-lriazine-2-carboxylie acid ( 2 ) and 2-aldehyde ( 8 ). The 4,6-bis-(4-chlorophenyl)-s-triazine derivatives were surprisingly inert to a variety of reagents. 4,6-Bis-(4-chlorophenyl)-2-methyl-s-triazine ( 1 ) could not be oxidized with any of a variety of oxidants. On bromination 1 gave 4,6-bis(4-chlorophenyl)-2-dibromomethyl-s-triazine ( 4 ) which was resistant to hydrolysis but on oxidation with selenium dioxide gave 2 . Compound 2 was also prepared by the oxidation of 4,6-bis(4-chlorophenyl)-2-hydroxymethyl-s-triazme ( 7 ) with potassium permanganate. Other reagents did not oxidize 7 to 8 . 4,6-Bis(4-chloroanilino)-2-mcthyl-s-triazine ( 3 ) was also resistant to oxidizing agents. 2-Diazomethy1-4,6-dichloro-s-triazine ( 11 ) on reaction with 4-chloroaniline gave 4,6-bis(4-chloroanilino)-2-chloromethyl-s-triazine ( 12 ). All efforts to prepare 8 were unsuccessful.     

Synthesis and some properties of aminopropynylimidazoles

Conclusions A number of mono- and di (aminopropynyl) imidazoles was synthesized by the condensation of iodoimidazoles with N-substituted propargylamines, and some of their pharmacological properties were studied.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2638–2640, November, 1973.     

Synthesis and some properties of o-borylphenylphosphine

(o-Dibutylboryl)diphenylphosphine, containing tricoordinated phosphorus and boron atoms, was obtained for the first time in the reaction of (o-bromo-phenyl)diphenylphosphine, butyllithium, and butylchloroborane. Analysis of the spectral indices and their comparison with reported data showed the lack of stabilizing donor-acceptor interactions between phosphorus and boron atoms.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2397–2399, October, 1991.