共查询到20条相似文献,搜索用时 31 毫秒
1.
V. R. Sinyakov T. V. Mezhenkova V. M. Karpov V. E. Platonov 《Russian Journal of Organic Chemistry》2007,43(11):1677-1685
Perfluoro(1-ethyl-1,2-dihydrocyclobutabenzene) reacts with pentafluorobenzene in SbF5 to give perfluoro(1-ethyl-2-phenyl-1,2-dihydrocyclobutabenzene). Analogous reaction of a mixture of perfluoro(1,1-diethyl-1,2-dihydrocyclobutabenzene) and perfluoro(1,2-diethyl-1,2-dihydrocyclobutabenzene) leads to the formation (after hydrolysis of the reaction mixture) of perfluorinated 7-phenyl-8,8-diethylbicyclo[4.2.0]octa-1,4,6-trien-3-one, 1,1-diethyl-2-(4-oxocyclohexa-2,5-dienylidene)-1,2-dihydrocyclobutabenzene, and 2-(pent-2-en-3-yl)benzophenone (from the 1,1-isomer) and perfluorinated (E)-1,2-diethyl-1-phenyl-1,2-dihydrocyclobutabenzene, 7,8-diethyl-8-phenylbicyclo[4.2.0]octa-1,4,6-trien-3-one, and 1-[2-(1-phenylprop-1-en-1-yl)-phenyl]propan-1-one (from the 1,2-isomer). 相似文献
2.
CMR spectra of the following bicyclo[2,2,2]octane compounds were measured: 1-azabicyclo[2,2,2]octan-3-one ( 3 ), 2-azabicyclo[2,2,2]octan-3-one ( 5 ), bicyclo[2,2,2]octaone ( 4 ), 3-ethyl-1-azabicyclo[2,2,2]oct-2-ene ( 6 ) and of the Z and E isomers of 3-ethylidene-1-azabicyclo-[2,2,2]octane ( 1 and 2 ). The attribution of the signals and confirmation of the Z and E configuration of isomers ( 1 ) and ( 2 ) is described. 相似文献
3.
Sittisombut C Boutefnouchet S Trinh Van-Dufat H Tian W Michel S Koch M Tillequin F Pfeiffer B Pierré A 《Chemical & pharmaceutical bulletin》2006,54(8):1113-1118
Condensation of 2-hydroxy-1-naphthalenecarboxylic acid with phloroglucinol afforded 9,11-dihydroxy-12H-benzo[a]xanthen-12-one (6). Construction of an additional dimethylpyran ring onto this skeleton, by alkylation with 3-chloro-3-methyl-1-butyne followed by Claisen rearrangement, gave access to 6-hydroxy-3,3-dimethyl-3H,7H-benzo[a]pyrano[3,2-h]xanthen-7-one (12) and 5-hydroxy-2,2-dimethyl-2H,6H-benzo[a]pyrano[2,3-i]xanthen-6-one (13), which were methylated into 6-methoxy-3,3-dimethyl-3H,7H-benzo[a]pyrano[3,2-h]xanthen-7-one (14) and 5-methoxy-2,2-dimethyl-2H,6H-benzo[a]pyrano[2,3-i]xanthen-6-one (15), respectively. Osmium tetroxide oxidation of 14 and 15 gave the corresponding (+/-)-cis-diols 16 and 17, which afforded the corresponding esters 18-21 upon acylation. Similarly, condensation of 2-hydroxy-1-naphthalenecarboxylic acid with 3,5-dimethoxyaniline gave 11-amino-9-methoxy-12H-benzo[a]xanthen-12-one (23) which was converted into 11-amino-9-hydroxy-12H-benzo[a]xanthen-12-one (24) upon treatment with hydrogen bromide in acetic acid. Alkylation with 3-chloro-3-methyl-1-butyne followed by Claisen rearrangement afforded 6-amino-3,3-dimethyl-3H,7H-benzo[a]pyrano[3,2-h]xanthen-7-one (25) and 5-amino-2,2-dimethyl-2H,6H-benzo[a]pyrano[2,3-i]xanthen-6-one (26). The new benzopyranoxanthone derivatives only displayed marginal antiproliferative activity when tested against L1210 and KB-3-1 cell lines. The only compounds found significantly active against L1210 cell line, 16 and 20, belong to the benzo[a]pyrano[3,2-h]xanthen-7-one series, which possess a pyran ring fused angularly onto the xanthone basic core. 相似文献
4.
A. Sh. Oganisyan A. S. Noravyan M. Zh. Grigoryan 《Chemistry of Heterocyclic Compounds》2003,39(9):1203-1206
The previously unreported pyrano[3',4':6,7]pyrido[2,3-d]pyrimidines have been synthesized from 2-ethyl-2-methyltetrahydropyran-4-one. 相似文献
5.
Condensation of propanal with cyanothioacetamide and morpholine gave 3-cyano-4-ethyl-5-methyl-6-morpholino-2-piperidone, the
structure of which was studied by X-ray analysis. Reaction of propanal with cyanothioacetamides and cycloalkanone enamines
gave 3-cyano-4-ethyl-2,5,6,7-tetrahydropyrindin-2(1H)-one and 3-cyano-4-ethyl-5,6-hexamethylenepyridine-2(1H)-thione. The
latter was used for the preparation of substituted 2-benzyloxycarbonylmethylthiopyridine and 3-amino-2-benzyloxycarbonylthieno[2,3-b]pyridine.
__________
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1053–1059, July, 2005. 相似文献
6.
Ippolito Antonini Francesco Claudi Gloria Cristalli Mario Grifantini Sante Martelli 《Journal of heterocyclic chemistry》1981,18(2):399-404
The course of the thermal decomposition of various 2-amino-3-substituted aziridino-1,4-naphthoquinones (Ia-g) was investigated. In all the cases, the thermal decomposition gave variable amounts of 2,3-diamino-1,4-naphthoquinone (II) and of substituted 1,2,3,4,5,10-hexahydrobenzo[g]quinoxaline-5,10-diones (IIIa-g) with complete stereospecificity. The decomposition of the aziridines Ib,f also gave significative amounts of 2-amino-3-allylamino-1,4-naphthoquinones (IVb,f). In the case of 2-amino-3-(2′-phenyl-3′-ethylaziridino)-1,4-naphthoquinone (Ig), the formation of trans-1-phenyl-1-butene (V), 2-(1-phenylpropyl)-1H-naphtho-imidazole-4,9-dione (VI), 2-phenyl-3-ethyl-3,4,5,10-tetrahydrobenzo[g]quinoxaline-5,10-dione (VII), 2-phenyl-3-ethyl-5,10-dihydrobenzo[g]quinoxaline-5,10-dione (VIII), and a mixture of cis- and trans-4H-2,3,5,6-tetra-hydro-2-phenyl-3-ethyl-5-iminonaphtho[1,2-b]oxazin-6-one (IX) also occurred. Hypotheses concerning the mechanism and the steric course of this reaction are given. The reaction is a general method for the stereospecific synthesis of 2,3-disubstituted 1,2,3,4,5,10-hexahydrobenzo[g]quinoxalines. 相似文献
7.
Sunil Sinha Anil Tyagi R. K. Pandey B. C. Joshi 《Journal of heterocyclic chemistry》1985,22(1):235-237
Synthesis and medicinal importance of 4-methyl-6-nitro-8,9,10,11-tetrahydro-2H-benzofuro[2,3-b]-1-benzo-pyran-2-one (I), 4-ethyl-11-nitro-6,7,8,9-tetrahydro-2H-benzofuro[3,2-g]-1-benzopyran-2-one (II), and 6,7-di-hydro-4,13-dimethylbis-1-benzopyrano[6,7-d:7′,6′-d']-2H,11H-benzo[1,2-b:3,4-b']difuran-2,11-dione (III) is presented. The structures of these compounds were confirmed by elemental analysis and spectral studies. 相似文献
8.
Tatyana V. Mezhenkova Vyacheslav E. Platonov Yuri V. Gatilov 《Journal of fluorine chemistry》2009,130(10):951-958
Interaction of perfluoro-1-ethyl-1-phenylbenzocyclobutene with SbF5 at room temperature gives, after treatment of the reaction mixture with H2O, perfluoro-4-[1-(2-methylphenyl)propylidene]cyclohexa-2,5-dienone as a main product. The reaction at 90-95 °C leads, after treatment with H2O, to a mixture of perfluorinated 9-ethyl-9-methyl-1,2,3,4-tetrahydro-9H-fluorene, 9-ethyl-4a-methyl-4,4a-dihydrofluoren-1-one, 3-ethyl-3-phenylphthalide, 1-hydroxy-2-methyl-1-phenylindan, 3-methyl-2-phenylindenone and small amounts of other products. 相似文献
9.
Condensation of 1-alkyl-, 1-allyl-, and 1-benzyl-1,2,3,9a-tetrahydro-9H-imidazo[1,2-a]indol-2-ones with benzaldehydes in acetic acid and subsequent treatment of the reaction mixture with potassium hydroxide afforded 1-substituted 9a-(2-phenylethenyl)-1,2,3,9a-tetrahydro-9H-imidazo[1,2-a]indol-2-one derivatives. 1-Methyl- and 1-ethyl-9a-[2-(4-dimethylaminophenyl)ethenyl]-1,2,3,9a-tetrahydro-9H-imidazo[1,2-a]indol-2-ones were synthesized by alkylation of 9a-[2-(4-dimethylaminophenyl)ethenyl]-1,2,3,9a-tetrahydro-9H-imidazo[1,2-a]indol-2-one with methyl- and ethyl iodides in DMF in the presence of a strong base. 相似文献
10.
Reaction of the Reissert anion with the carbonyl group of 1,3,4,6,7,11b-hexahydro-9,10-dimethoxybenzo[a]quinolizin-2-one and with 3-ethyl-1,2,3,4,6,7-hexahydro-9,10-dimethoxy-11bH-benzo[a]quinolizin-2-carboxaldehyde give emetine analogs. This anion does not react with the carbonyl group of 3-aIkyl-1,3,4,6,7,11b-hexahydro-9,10-dimethoxybenzo[a]quinolizin-2-one but instead gives a rearrangement product and the benzoquinolizinone cyanohydrin. 相似文献
11.
Granados AM Kreiker J de Rossi RH Fuertes P Torroba T 《The Journal of organic chemistry》2006,71(2):808-810
[reaction: see text] Tricyclic 4-ethyl-5-thioxo-3H,5H-bis[1,2]dithiolo[3,4-d][4,3-b]pyrrol-3-one and monocyclic 3H-1,2-dithiole-3-thione derivatives reacted with Fischer carbene complexes, giving 1,3-dithiin dithioortho esters through insertion of the carbenic carbon into the S-S bond next to the thiocarbonyl function of the substrate. 相似文献
12.
综合运用硅胶柱色谱、反相硅胶柱色谱、Sephadex LH-20凝胶柱色谱以及制备型高效液相色谱技术对药用植物巴戟天内生真菌Trichoderma spirale A725的次生代谢产物进行分离纯化,得到6个聚酮类化合物,采用多种现代波谱技术确定其结构,分别为:6-羟基-4-异丙基-1,8-二甲基螺环[4.5]癸-1,8-二烯-7-酮(1),2-羟基-2,5-二甲基-7-氧代-5,7-二氢-2H-呋喃[3,4-b]吡喃-4-羧酸(2), 3-乙基-4-羟基-6-甲基-二氢-吡喃-2-酮(3),苯乙内酯A (4), 3-羟基-5-(4-羟基苄基)二氢呋喃-2(3H)-酮(5), 4-乙酰-3-羟基-6-甲基吡喃-2-酮(6).其中化合物1和2为新化合物,化合物3为新天然产物.此外,利用四株肿瘤细胞株(Hep G-2、MCF-7、SF-268及A549)对化合物1~6细胞毒活性进行评估,结果表明化合物1~6对上述肿瘤细胞均无明显的细胞毒活性. 相似文献
13.
Under basic conditions. [1]benzopyrano[2,3-b]quioxakin-12-one leads to 3-(i-hydroxybenzoy1)-1H-quinoxalin-2-one. This ketone reacts with hydroxylamine and phenylhydrazine to give the expected derivatives or those of [1]benzopyrano92,3-b]quinoxalin-12-one. The reduction of [1]benzopyrano[2,3-b]quinoxalin-12-one was unsucessful by chemical means. However, electrochemical reduction leads to a dihydropyrazine nucleus. 相似文献
14.
Salicylidenes prepared from 5-ethyl-4-thiolen-2-one undergo base-catalyzed rearrangement (salicylidene-thiolactone rearrangement) to 4H-thieno[3,2-c][1]benzopyran-4-ones. 相似文献
15.
Salvadorin, a new dimeric dihydroisocoumarin (1), was isolated from the chloroform fraction of Salvadora oleoides. Its chemical structure was established as 8-benzyl-6-[6-(6-ethyl-7-methyl-5,8-dihydro-2-naphthalenyl)-1-oxo-3,4-dihydro-1H-isochromen-8yl]-3, 4-dihyro-1H-isochromen-1-one, through spectroscopic techniques and chemical analysis. 相似文献
16.
This paper reports our recent efforts to develop novel tricycles based on 4H-benzo[1,4]thiazin-3-one ( 2) and 1,1-dioxo-1,4-dihydro-2H-1lambda(6)-benzo[1,4]thiazin-3-one (3) using 1,5-difluoro-2,4-dinitrobenzene (1). All of these tricycles integrate two privileged structures into one skeleton, including 3,8-dihydro-5-thia-1,3,8-triaza-cyclopenta[b]naphthalene-7-one (4, 10, 12), 5,5-dioxo-3,5,6,8-tetrahydro-5lambda(6)-thia-1,3,8-triaza-cyclopenta[b]naphthalene-7-one (5, 11), 3,8-dihydro-5-thia-1,2,3,8-tetraaza-cyclopenta[b]naphthalene-7-one (6), 5,5-dioxo-3,5,6,8-tetrahydro-5lambda(6)-thia-1,2,3,8-tetraaza-cyclopenta[b]naphthalene-7-one (7), 3,8-dihydro-1H-5-thia-1,3,8-triaza-cyclopenta[b]naphthalene-2,7-dione (8), and 5,5-dioxo-3,5,6,8-tetrahydro-1H-5lambda(6)-thia-1,3,8-triaza-cyclopenta[b]naphthalene-2,7-dione (9). A typical library of scaffold 5 was synthesized in a parallel solution-phase manner and analyzed by HPLC-UV-MS or HPLC-UV-ELSD method. 相似文献
17.
Asensio González 《合成通讯》2013,43(5):669-674
A facile synthesis of 8-ethyl-4,9-dihydro-3H-pyrano [3,4-b]indole-1-one 5 is described which features the condensation of hydrazines with 2-oxo-5-hydroxypentanoic acid, followed by Fischer Cyclization of these adducts. 相似文献
18.
V. A. Mamedov A. A. Kalinin A. T. Gubaidullin I. A. Litvinov 《Russian Chemical Bulletin》2007,56(12):2471-2478
Bis-3-(α-bromoethyl)quinoxalin-2-ones with 3-oxapentane or 3,6-dioxaoctane spacer binding two heterocyclic fragments react
with thiourea to give the corresponding bis-spirothiazoloquinoxalines, which upon treatment with acetic anhydride can be converted
to podands with terminal thiazoloannulated quinoxaline fragments. X-Ray data for 2′-amino-4-ethyl-5-methyl-1,2,3,4,4′,5′-hexahydrospiro[quinoxaline-2,4′-thiazol]-3-one
indicate for this compound a potentiality to form clathrate structures with various solvate molecules.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2386–2393, December, 2007. 相似文献
19.
A Synthesis of Bicyclo[10.3.0]pentadec-1(12)-en-13-one and its 14-Methyl Derivative. A new route to bicyclo[10.3.0]pentadec-1(12)-en-13-one ( 2 ) and its 14-methyl derivative 3 – useful intermediates in the synthesis of cyclopentadecanone ( 4 = exaltone®) and rac-muscone ( 5 ) – is described. 相似文献
20.
Two low level impurities in 3-[2-(2-benzoxazolyl)ethyl]-5-ethyl-6-methyl-2(1H)-pyridinone drug substance (L-696,229) have been isolated by a combination of preparative HPLC, solid-phase extraction and liquid-liquid extraction. They were identified as 3-[2-(2-benzoxazolyl)ethyl]-5-ethyl-6-(2-phenylethyl)-2(1H)-pyridinone (I) and 6,6'-(2-phenyl-1,3-propanediyl)bis[3-[2-(2-benzoxazolyl)ethyl]-5-ethyl-2(1H)-pyridinone] (II) by mass spectrometry and by their (13)C and (1)H-NMR spectra. 相似文献