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1.
Issa Yavari Abdolali Alizadeh 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6):1003-1008
Stable diastereomeric ethyl 1-benzoyl-6-(bromomethyl)-2,2,2,4-tetra- phenyl-3,7-dioxa-2λ 5 -phosphabicyclo[3.2.0]hept-4-ene-6-carboxylate was obtained in 98% yield from the reaction between dibenzoylacetylene as electron-deficient acetylenic compound, and ethyl 3-bromopyruvate in the presence of triphenylphosphine in dry ether. 相似文献
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4-chloroquinoline-3-carboxylates 2 and 5-mercapto-1,2,4-triazoles 3 have been cyclised to a novel heterocyclic system 4 . 相似文献
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《中国化学快报》1992,(4)
Starting from camphene and NBS the 1-bromomethyl-7, 7-dimethylblcyclo-[2.2.1]hept-2-yl acrylate [BMCHA] has been synthesized by two steps. The polymerization kinetics equation of this monomer was obtained as follows: Rp=K[BPO]~(0.50)[BMCHA]~(1.0) and the apparent activation energy of the polymerization was evaluated to be 82.96KJ/mol. 相似文献
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Harutyunyan A. A. Gukasyan G. T. Panosyan H. A. Tamazyan R. A. Ayvazyan A. G. Grigoryan A. S. Danagulyan G. G 《Russian Journal of Organic Chemistry》2019,55(11):1698-1703
Russian Journal of Organic Chemistry - The reactions of 4-methyl- and (RS)-4,6-dimethyl-2-phenyl-5,6-dihydrobenzo[4′,5′]imidazo-[2′,1′:6,1]pyrido[2,3-d]pyrimidines and... 相似文献
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V. S. Tolkunov A. B. Eres’ko A. I. Khizhan A. V. Mazepa G. V. Palamarchuk O. V. Shishkin S. V. Tolkunov 《Chemistry of Heterocyclic Compounds》2012,48(4):666-671
A series of previously unknown 2-([1]benzothieno[2,3-c]pyridin-1-yl)benzoic acids and 8,13b-dihydro-[1]benzothieno[2',3':3,4]pyrido[2,1-a]isoindol-5(7 H)-ones has been synthesized using domino reactions, taking place at the cyclization of 2-[3-oxo-4-(phenylsulfanyl)butyl]-1,3-isoindolinediones in polyphosphoric acid. 相似文献
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E. A. Bakhite A. A. Geies H. S. El-Kashef 《Phosphorus, sulfur, and silicon and the related elements》2013,188(2):303-323
4-Methyl-2-phenyl-5-(1-pyrryl)-6-substituted-thieno[2,3-d]pyrimidines ( 3a-c , 4a-c , 5a , b , and 6 ) have been synthesized. Some of the substituents in position 6 were used to build up different sulfur-, nitrogen- and/or oxygen-containing heterocyclic rings at that position. The 4-methyl-2-phenyl-5-(1-pyrryl)-thieno[2,3-d]pyrimidine-6-carboazide ( 20 ) was also used as a key intermediate in the synthesis of the target pyrrolo[1",2":1',6']pyrazino[2',3':4,5]thieno[2,3-d]pyrimidines. 相似文献
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I. D. Bystryakova N. M. Smirnova T. S. Safonova 《Chemistry of Heterocyclic Compounds》1993,29(6):687-690
The reaction of 1,3-dimethyl-5-chloro-6-nitropyrido[2,3-d]pyrimidine-2,4-dione with CH-acids yielded 5-substituted pyridol[2,3-d]pyrimidines which were used in the synthesis of pyrrolo(2,34,5)pyrido[2,3-d]pyrimidines.For Communication 7, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 800–803, June, 1993. 相似文献
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Abdou O. Abdelhamid Zeineb H. Ismail Soad M. Abdel-Gawad Moustafa M. Ghorab Anhar Abdel-Aziem 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):58-75
Thieno[2,3-b]pyridines were synthesized from 6-benzofuran-2-yl-4-phenyl-2-sulfanylpyridine-3-carbonitrile and each of chloro acetone, ethyl chloroacetate, ω -bromoacetophenone, and chloroacetonitrile. These compounds were conveniently converted into novel pyrido[4′,5′:4,5]thieno[3,2-d]pyrimidines. Also, 2,3-dihydro-1,3,4-thiadiazole was synthesized from hydrazonoyl halides and 2-benzofuran-2-yl-3-(phenylamino)-3-thioxopropanenitrile. The structures of the products have been elucidated by elemental analyses, spectral data studies, and alternative syntheses whenever possible. The newly synthesized compounds were tested towards microorganisms. 相似文献
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The axial-equatorial conformational isomer distribution of the reactant diazoacetoacetate or its metal carbene intermediate is reflected in Rh(II) catalyzed oxonium ylide forming reactions of 3-(trans-2-arylvinyl)tetrahydropyranone-5-diazoacetoacetates that afford diastereoisomeric products for both the symmetry-allowed [2,3]- and the formally symmetry-forbidden [1,2]-oxonium ylide rearrangements. 相似文献
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The reaction of 5,7-dichloro-6-nitropyrido[2,3-d]-pyrimidine-2,4-dione with amines gave products of the substitution of one or two chlorine atoms by ammo groups. The catalytic reduction of 6-nitro-5,7-disubstituted pyrido[2,3-d]pyrimidines with hydrogen over palladium oxide on carbon leads to 5,6-diamino- and 5,6,7-triaminopyridopyrimidines, the reaction of which with amyl nitrite in acetic acid gives triazolo(4,5:4,5) pyrido[2,3-d]pyrimidines.For communication 6 see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 398–401, March, 1993. 相似文献
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对以NA封头的“PMR型”聚酰亚胺溶液中产生的沉淀物进行了分离和鉴定。测定了NA乙酯、二苯甲酮四甲酸二乙酯与二氨基二苯甲烷的反应速度常数,并对树脂溶液的稳定性和低聚物的结构进行了讨论。 相似文献
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An anhydride monomer containing ether oxide bridge,7-oxa-bicyclo[2,2,1]hept-5-ene-2,3-dicarboxylic anhydride (ONA),was successfully synthesized by Diels-Alder reaction of furan and maleic anhydride.The ONA was also studied as an end-cap for the polymerization of monomer reactant(PMR) type polyimides.Three molecular weight levels of the ONA end-capped PMR resins were evaluated.The effects of process conditions of these novel PMR resins on thermal and mechanical properties were investigated.It was demonstr... 相似文献
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Bernd G. Müller 《Journal of fluorine chemistry》1981,17(5):409-421
[O2]+[Mn2F9]? has been prepared for the first time by reaction of MnO2 or MnFx (x = 2,3,4) with a mixture of fluorine and oxygen (PF2/O2 ≈ 300–3500 atm., t ≈ 350–550°C) either as a dark red powder or as ruby red needles or plates. From single crystal studies the space group is C2/c - C62h (No. 15) with a = 17.552, b = 8.373, c = 9.101 Å, β = 102.3°, Z = B (at ?150°C). The crystal structure has been refined to R = 0.053 (1619 unique reflections). From the structure determination [O2]+[Mn2F9] has ‘mänder’ like bands of double chains of [MnF6] octahedra, which are stacked up in layers parallel to (100) with O2+-cations (d0?0 = 1.100 Å) located between the layers. νO2 is at 1838 cm?1 and the magnetic moment μeff = 5.63 B.M. is as expected for a ‘spin only’ case without spin-spin interaction. 相似文献
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Cycloaddition of diazoalkanes to diazabicyclo[2.2.0]hexenes and subsequent extrusion of nitrogen afford diazatricyclo[3.2.0.02,4]heptanes that are easily valence isomerized to novel dihydrodiazepines. 相似文献
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Bernd G. Müller 《Journal of fluorine chemistry》1981,17(5):489-499
[O2]2+2[Ti7F30]2? has been obtained by reaction of TiO2 with a mixture of fluorine and oxygen (pF2/O2 ≈ 300–3500 atm., t ≈ 300–450°C) either as colourless powder or in form of colourless, clear needles. From single crystal studies the spacegroup is P - C3i1 (No. 147) with a = 10.192, c = 6.50o Å, Z = 1. The crystal structure has been refined to R = 0.086 [Rw = 0.058] (748 unique reflexions [Fo > 2σ(Fo)]). From the structure determination [O2]2+2[Ti7F30]2? has isolated columns of partially distorted [TiF6] octahedra (- column structure) which are connected only quite loosely by (disordered) O2+ cations. νO2+ is at 1857 cm?1, the magnetic moment μeff = 2.35 B.M. (295 K) is quite as expected for a ‘spin-only’ case. 相似文献
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本文讨论了双环[2.2.1]庚-5-烯-2-羧酸乙酯在采用无水甲酸作反应介质时的Prins反应.在反应中发现有Wagner-Meerwein类重排发生,并分到重排产物,也有未经重排但发生内酯化的产物存在. 相似文献
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