共查询到20条相似文献,搜索用时 15 毫秒
1.
O. V. Serdyuk I. V. Evseenko G. A. Dushenko Yu. V. Revinskii I. E. Mikhailov 《Russian Journal of Organic Chemistry》2012,48(1):78-82
Previously unknown 2-[2-(9-anthryl)vinyl]quinolin-8-ol and 2-[2-(9-anthryl)vinyl]-8-methoxyquinoline were synthesized by condensation
of 8-hydroxy(methoxy)-2-methylquinoline with 9-anthraldehyde in acetic anhydride, as well as by the Wittig reaction. The product
structure was determined on the basis of their 1H NMR, IR, UV, and mass spectra and quantum-chemical calculations. 2-[2-(9-Anthryl)vinyl]-8-methoxyquinoline
showed luminescence with a quantum yield φ of 0.25, which was considerably higher than that of its 8-hydroxy analog (φ = 0.067). 相似文献
2.
Nitration of 4-methyl-2-[2-(nitro-2-furyl)vinyl]thiazole with a mixture of concentrated nitric and sulfuric acids leads to 4-methyl-5-nitro-2-[2-(3,5-dinitro-2-furyl)vinyl]thiazole. Under the same conditions 2-methyl- and 2-acetamido-4-[1-R-2-(5-nitro-2-furyl)vinyl]thiazoles (R=CH3, Cl) are nitrated in the 3 position of the furan ring, 2-amino-4-[1-chloro-2-(5-nitro-2-furyl)vinyl]thiazole is nitrated in the 5 position of the thiazole ring and 2-acetamido-5-nitro-4-[2-(2-furyl)vinyl]thiazole undergoes profound changes. Under the influence of a mixture of of nitric acid and acetic anhydride the latter compound is converted quantitatively to the 5-nitro derivative (with respect to the furan ring), whereas 4-[2-(5-nitro-2-furyl)vinyl]thiazole derivatives do not undergo reaction.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 314–317, March, 1977. 相似文献
3.
A. Shahrisa M. Zirak A. R. Mehdipour R. Miri 《Chemistry of Heterocyclic Compounds》2011,46(11):1354-1363
New symmetrical 4-[2-chloro-2-(4-chloro-6-methyl-2-oxo-2H-pyran-3-yl)vinyl]-substituted 1,4-di-hydropyridines were synthesized
in moderate to good yields via the modified Hantzsch reaction of β-dicarbonyl compounds with (Z)-3-chloro-3-(4-chloro-6-methyl-2-oxo-2H-pyran-3-yl)acrolein in the presence of an excess amount of NH4OAc. Also, the reaction of β-dicarbonyl compounds with (Z)-3-chloro-3-(4-chloro-6-methyl-2-oxo-2H-pyran-3-yl)acrolein in the presence of enamino esters and ketones was performed,
and asymmetrical 4-[2-chloro-2-(4-chloro-6-methyl-2-oxo-2H-pyran-3-yl)vinyl]-substituted 1,4-dihydropyridines were obtained
in moderate to good yields at room temperature. The calcium channel blocking activity of these compounds was assessed. They
demonstrated moderate to weak effects, although one compound had a comparable effect (IC50 =1.40×10−7 M) with respect to the reference drug Nifedipine. 相似文献
4.
Berezovskii V. V. Ishkov Yu. V. Mazepa A. V. 《Russian Journal of Organic Chemistry》2010,46(9):1409-1413
2-[2-(1,3-Dioxolan-2-yl)vinyl]-5,10,15,20-tetraphenylporphyrin and its copper complex were reduced into the corresponding
ethyldioxolanes by diimide generated in the system hydrazine hydrate — air oxygen — pyridine. The hydrolysis of the obtained
ethyldioxolanes results in the formylethyl derivatives that react with the methylenetriphenylphosphorane to form 2-(3-butenyl)-5,10,15,20-tetraphenyl
porphyrin and its copper complex. 相似文献
5.
V. N. Elokhina A. S. Nakhmanovich L. I. Larina O. V. Shishkin V. N. Baumer V. A. Lopyrev 《Russian Chemical Bulletin》1999,48(8):1516-1518
1-[1-Bromo-2-benzoyl(2-thenoyl)vinyl]-1,1-dimethylhydrazinium bromides were synthesized by the reactions of 1-aroyl-2-bromoacetylenes
withN,N-dimethylhydrazine in acetonitrile at 20°C. The structure of 1-(2-benzoyl-1-bromovinyl)-1,1-dimethylhydrazinium bromide was
established by X-ray diffraction analysis.
Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 8, pp. 1536–1538, August, 1999. 相似文献
6.
(E)-N-芳基-3-[2-(8-羟基喹啉基)-乙烯基]咔唑的合成、抗氧化活性及促进鼠骨髓间质干细胞增殖的研究 总被引:4,自引:0,他引:4
设计合成了3-[2-(8-羟基喹啉基)-乙烯基]-N-对甲苯基咔唑(8)和3-[2-(8-羟基喹啉基)-乙烯基]-N-对甲氧苯基咔唑(9)两个新的化合物, 用IR, MS, 1H NMR和元素分析确认其结构. 并利用DPPH8226;方法, 超氧阴离子自由基( )法, 羟基自由基HO8226;法和噻唑蓝比色法(MTT法)分别测定了目标产物的抗氧化活性和调控鼠骨髓间质干细胞(MSCs)的作用. 结果表明, 这两种化合物对DPPH8226;自由基、超氧阴离子自由基和羟基自由基具有较强的抗氧化活性, 化合物9在低浓度时对鼠骨髓间质干细胞增殖有很好的促进作用. 相似文献
7.
A synthesis is reported for N1-mono- and N1,N3-disubstituted uracil derivatives containing a terminal carbon-carbon double bond in the side-chain. Alkylation of vinyl 2-chloroethyl ether by uracil potassium salts leads to a mixture of 1-[2-(vinyloxy)ethyl] and 1,3-di[2-(vinyloxy)ethyl] derivatives while treatment of 2,4-bis(trimethylsilyloxy)pyrimidines by vinyl 2-chloroethyl ether leads exclusively to N1-monosubstituted products. Alkylation of cytosine by this chloroether gave 1-[2-(vinyloxy)ethyl]cytosine. The synthesis of 1-[2-(allyloxy)ethyl]uracil derivatives was carried out by treatment of uracil potassium salts by 1-(allyloxy)-2-(p-toluenesulfonyloxy)ethane.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 393–397, March, 1993. 相似文献
8.
The corresponding 2-(2-furyl)naphth[1,2-d]imidazoles were obtained by heating Schiff bases, prepared from 1,2-naphthalenediamine and furfural and 5-bromo- and 5-nitrofurfurals, in nitrobenzene. 2-[-(2-Furyl)vinyl]naphth[1,2-d]imidazoles were synthesized by condensation of 2-methylnaphth[1,2-d]imidazole with furfural and 5-bromo- and 5-nitrofurfural. The methylation, nitration, and acetylation of the compounds obtained were studied, and the replacement of the bromine atom in the furan ring by a nitro group was also investigated.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1555–1557, November, 1972. 相似文献
9.
D. Jansone M. Fleisher J. Popelis G. Andreeva L. Baumane E. Abele 《Chemistry of Heterocyclic Compounds》2012,47(12):1533-1538
A quantum-chemical investigation has been carried out by the semiempirical AM1 method of the trans-cis photoisomerization mechanism of 4-[2-(2-chlorophenyl)vinyl]-6,6-dimethyl-2-oxo-1,2,5,6-tetra- hydropyridine-3-carbonitrile.
It was shown that the isomerization process proceeds in the excited singlet state S1 by rotation of the 2-chlorophenyl substituent around the C(2)–C(3) bond. Electronic absorption spectra of the isomers were
calculated by the INDO/S method Transitions caused by exitation of an electron from HOMO to LUMO were characterized by the
greatest intensity. 相似文献
10.
本文用三苯基氢化锡、三对甲苯基氢化锡作为锡氢化试剂与1-乙炔基环辛醇进行反应, 合成了两个有机锡化合物: [Z]-1-[2-(三苯基锡基)乙烯基]环辛醇(1)和[Z]-1-[2-(三对甲苯基锡基)乙烯基]环辛醇(2), 并测定了1的晶体结构。1和2分别与ICl, Br2, I~2反应, 得到六个有机锡一卤化物和三个有机锡二卤化物(3-11)。有机锡二卤化物6和一卤化物5与KOH乙醇溶液反应, 分别得到相应的锡氧化物和锡氢氧化物(12, 13)。有机锡二卤化物8分别与含氮双齿配体[2,2'-联吡啶(Bipy),5-硝基-1,10-邻菲罗啉(Nphen),8-羟基喹啉(Oxin)]反应, 得到三个相应的配合物(14-16)。十六个新化合物通过元素分析、锡含量测定、IR、^1H NMR测定对其结构进行了表征, 同时提出了1和2的生成反应历程。 相似文献
11.
Merlin C. E. Bandeira Joseph A. Crayston Norberto S. Gonçalves Lúcia K. Noda Andrew Glidle César V. Franco 《Journal of Solid State Electrochemistry》2007,11(2):231-239
The electropolymerization of trans-[RuCl2(vpy)4] (vpy=4-vinylpyridine) on Au or Pt electrodes was studied by cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM) technique, and Raman spectroscopy. Cyclic voltammetry of the monomer at a microelectrode shows the typical Ru(III/II) and Ru(IV/III) waves, together with the vinyl reduction waves at −1.5 and −2.45 V and adsorption wave at −0.8 V. Electrodeposition on EQCM technique performed under potential cycling between −0.9 and −2.0 V revealed that the polymerization proceeded well in advance of the vinyl reduction waves. At potentials more positive than −0.9 V, soluble oligomers were deposited irreversibly on the electrode during the oxidative sweep. The film also showed reversible mass changes due to the oxidation and accompanying ingress of charge-balancing anions and solvent into the film. In contrast, potentiostatic growth of the polymer at −1.6 V was slower because the oligomeric material was lost completely from the electrode. Unreacted vinyl groups were detected by in situ Raman spectroscopy for films grown at −0.7, −0.9, and −1.6 V but were absent when the polymerization was carried out at −2.9 V vs Ag/Ag+. 相似文献
12.
The Knoevenagel condensations of 5-[3-(trifluoromethyl)phenyl]furan-2-carbaldehyde with seven compounds containing an active
methyl or methylene group have been studied. The compounds used were: methyl 2-cyanoacetate, malononitrile, 2-furylacetonitrile,
acetophenone, 2-thioxo-1,3-thiazolidin-4-one (rhodanine), 5,5-dimethylcyclohexane-1,3-dione (dimedone), and methyl 2-azidoacetate.
The effect of microwave irradiation on the condensation reactions was studied and compared with “’classical”’ conditions.
Thermolysis of methyl 2-azido-3-{5-[3-(trifluoromethyl)phenyl]-2-furyl}propenoate afforded methyl 2-[3-(trifluoromethyl)phenyl)]-4H-furo[3,2-b]pyrrole-5-carboxylate.
(2E)-3-{ 5-[3-(Trifluoromethyl)phenyl]-2-furyl}propenoic acid was converted to the corresponding azide, which was cyclized
on heating into 2-[3-(trifluoromethyl)phenyl)]-4,5-dihydrofuro[3,2-c]pyridin-4-one. The latter after successive action of
POCl3 and NH2NH2-Pd/C gave 2-[3-(trifluoromethyl)-phenyl]furo[3,2-c]pyridine.
Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 825–831, June, 2006. 相似文献
13.
V. N. Nesterov 《Russian Chemical Bulletin》1998,47(1):182-184
1-[1-Benzoyl-2-(2-furyl)vinyl]-2-dicyanomethylene-1,2-dihydropyridine was studied by X-ray structural analysis. The compound under study occurs as aZ isomer with respect to the central vinyl fragment. 相似文献
14.
α-Subslituted β-2-(5-nitrofuryl)viriylamines were synthesized from α-ary]-β-2-(5-nitrofuryl)-aeryloyl azides and N-[α-substituled β-2-(5-nitrofuryl)vinyl] pyridinium bromides. 相似文献
15.
Antonio Guirado Andrés Zapata Carmen Ramírez de Arellano Jesús Gálvez 《Tetrahedron》2009,65(19):3886-1516
Cathodic reductions of 2,2′-furils in the presence of N-arylcarbonimidoyl dichlorides lead to 2-arylimino-4,5-di(2-furyl)-1,3-dioxoles in high yields, along with minor amounts of (E)-1,2-di(2-furyl)vinylene bis(N-arylchloroformimidates). HF and B3LYP density functional theory methods have been applied to the determination of molecular geometries and to study the topomerization mechanism of aryliminodioxoles. The molecular structure of (E)-1,2-di(2-furyl)vinylene bis[N-(2-chloro-4-methylphenyl)chloroformimidate] has been determined by X-ray crystallography and compared with the calculated structure. 相似文献
16.
The corresponding 2-phenyl-3-(2-furyl)- and 2-phenyl-3-[-(2-furyl)vinyl]-1,2-dihydronaphtho-[1,2-d]-1,2,4-triazines were obtained by heating Schiff bases [prepared by reaction of 1-(phenyl-azo)-2-aminonaphthalene with furfural, -(2-furyl)acrolein, and their 5-bromo and 5-nitro derivatives] in glacial acetic acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 158–160, February, 1973. 相似文献
17.
Luis R. Domingo 《Theoretical chemistry accounts》2000,104(3-4):240-246
The chemoselectivity and regioselectivity of the domino intermolecular [4 + 2]/[3 + 2] cycloaddition reactions of nitroalkenes
with substituted alkenes, vinyl ethers as electron-rich alkenes and vinyl ketones as electron-poor alkenes, have been studied
using density functional theory (DFT) methods with the B3LYP functional and the 6-31G* basis set. These domino processes comprise two consecutive cycloaddition reactions: the first one is an intermolecular [4 + 2]
cycloaddition of the vinyl ether to the nitroalkene to give a nitronate intermediate, which then affords the final nitroso
acetal adduct through an intermolecular [3 + 2] cycloaddition reaction with the vinyl ketone. The two consecutive cycloadditions
present total chemoselectivity and ortho regioselectivity. While first [4 + 2] cycloaddition reaction takes place along the
attack of the electron-rich alkene to nitroalkene, the [3 + 2] one takes place along the attack of the electron-poor alkene
to the corresponding nitronate intermediate. This DFT study is in complete agreement with the experimental results.
Received: 16 September 1999 / Accepted: 3 February 2000 / Published online: 2 May 2000 相似文献
18.
Certain 5-aryl-6-[tetra(O-benzoyl)-β-D-glucopyranosylimino]-4-benzylthio-2-phenylimino-5,6-dihydro-2H-1,3,5-thiadiazines have
been prepared by interaction of N-[tetra(O-benzoyl)-β-D-glucopyranosyl] isocyanodichloride and 1-aryl-5-phenyl-2-(S-benzyl)-2,4-isodithiobiurets.
The products have been characterized through the usual chemical transformations, IR, NMR and mass spectral analyses. The compounds
have been screened for their antibacterial activities against various bacteria.
__________
Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 910–913, June, 2005. 相似文献
19.
The corresponding 2-(2-furyl)- and 2-[-(2-furyl)vinyl]imidazo[4,5-b]phenazines were obtained by the condensation of 2,3-diaminophenazine with furfural and 2-furylacrolein and with their 5-bromo and 5-nitro derivatives. The phenazines were also synthesized by the reaction of 2-methylimidazo[4,5-b]phenazine with furfural and 5-bromo- and 5-nitrofurfural. The alkylation, acetylation, and nitration of the compounds obtained, as well as replacement of the halogen in the furan ring by a nitro group, were studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1425–1428, October, 1971. 相似文献
20.
Palladium-catalysed reactions of aryl iodides/vinyl triflates with 2,2,2-trifluoro-N-(2-(4-[2,2,2-trifluoro-acetylamino)-phenyl]-buta-1,3-diynyl)-phenyl)-acetamide provide a straightforward entry into 3,3′-disubstituted-2,2′-biindolyls. Subsequent application of the procedure to homochiral aryl iodides affords the corresponding chiral 3,3′-disubstituted-2,2′-biindolyls. The methodology can also be applied to the synthesis of benzo[c]indolo[2,3-a]carbazoles. 相似文献