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以4-乙基苯胺1为原料,经Sandmeyer反应得5-乙基靛红2;2经水合肼还原得到5-乙基-2-吲哚酮3;N,N-二甲基甲酰胺与三氯氧磷先形成Vilsmeier-Haack试剂,再与化合物3反应,合成2-氯-5-乙基-3-乙酰吲哚4;以丙酮为溶剂,对化合物4烃基化,以78.5%-95.6%的收率得到N-取代-2-氯-5-乙基-3-乙酰吲哚5a-5e。其中化合物4、5a-5e均未见文献报道,它们的结构均通过红外光谱、核磁共振氢谱(碳谱),质谱等确认。 相似文献
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以3-甲基-2-硝基苯甲酸甲酯为起始原料,经两步反应制得中间体1H-吲唑-7-甲酸甲酯(3); 3分别与三氯氧磷、液溴和碘单质反应制得3的3-位卤代产物(4b~4d); 4d与氟试剂或氰化锌反应制得3-氟(氰基)-3(4a和4e); 4d与苯硼酸或甲基硼酸在四三苯基磷钯催化下反应制得3-甲基(苯基)-3(5a和5b);以氢化钠为碱,3, 4a~4c, 4e, 5分别与4-甲烷磺酰氧基哌啶或3-甲烷磺酰氧基四氢吡咯经缩合反应制得3的2,3-位取代产物(6a~6n); 6a~6n在甲醇中氨解,随后采用氯化氢气体脱去Boc保护基合成了14个新型吲唑类PARP-1抑制剂(7a~7n),其结构经1H NMR和ESI-MS表征。生物活性评价结果显示,有7个目标化合物对PARP-1酶活性抑制IC50低于30 nmol·L-1,其中2-(四氢吡咯-4-基)-2H-吲唑-7-甲酰胺(7e)和3-氟-2-(四氢吡咯-4-基)-2H-吲唑-7-甲酰胺(7f)的IC50分别为4.2 nmol·L-1和4.6 nmol·L-1。 相似文献
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以吲唑-3-羧酸为原料,依次经溴代和酯化反应制得中间体5-溴吲唑-3-羧酸甲酯(2);2经N-烷基化并原位水解生成1/2-取代-5-溴吲唑-3-羧酸(3);3与吡啶酮甲胺类化合物经缩合反应制得酰胺(4);4与芳基频哪醇硼酸酯发生Suzuki偶联反应合成了14个新型二取代吲唑-3-甲酰吡啶酮甲胺衍生物(5a~5n),收率26%~32%,其结构经~1H NMR,~(13)C NMR和HR-MS(ESI-TOF)表征。通过NOE差谱确证了取代基在吲唑氮原子上的取代位置。采用MTT法研究了5a~5n对人B淋巴瘤细胞(Ramos)、人黑色素瘤细胞(CHL-1,WM-266-4)和乳腺癌细胞(BT-474)的体外抗肿瘤活性。结果表明:5a,5b,5m对Ramos细胞、5a,5b,5l对WM-266-4细胞、5a,5b,5d,5e,5h,5j,5m,5n对CHL-1细胞和5a,5b,5d,5h,5m对BT-474细胞具有较好的抑制活性(IC5010.0μmol.L-1)。 相似文献
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4-(5-喹啉-3-基-四氮唑-2-基)丁胺的合成 总被引:1,自引:0,他引:1
三苯基膦钯催化3-溴喹啉完成氰化取代制得3-氰喹啉(1);1与叠氮化钠经[2+3]环加成合成了3-(2H-四氮唑-5-基)喹啉(2);2与N-(4-溴丁基)邻苯二甲酰亚胺反应制得2-[4-(5-喹啉-3-基-四氮唑-2-基)丁基]异吲哚-1,3-二酮(3);3经肼解合成了4-(5-喹啉-3-基-四氮唑-2-基)丁胺(4... 相似文献
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吲哚-3-甲酸是一种重要的有机中间体,被广泛应用于医药与农药的合成.以取代邻硝基甲苯为原料,与N,N-二甲基甲酰胺二甲基缩醛(DMFDMA)反应制得取代2-硝基-β-二甲氨基苯乙烯,再经铁粉和冰乙酸还原环合生成取代吲哚,取代吲哚与三氟乙酸酐经酰化、碱性条件下水解制得5种取代吲哚-3-甲酸类化合物,该合成方法操作简单,条件温和,收率较高. 相似文献
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β-Keto-β-sulfonylenamines 2a,b reacted with benzamidine or guanidines to give 2,4-disubstituted 5-methanesulfonylpyrimidines 3a-d , whose methanesulfonyl groups were substituted by n-butyllithium or alkylmagnesium bromides to yield 2,4-disubstitued 5-alkylpyrimidines 6a-d. 2-Substituted 4-amino-5-sulfonylpyrimidines 7a,b, 8 and 2-substituted 5-benzenesulfonylpyrimidin-4-ones 9a,b were similarly obtained from β-cyano-β-sulfonylenamines 2c,d and β-ethoxycarbonyl-β-sulfonylenamine ( 2e ), respectively. 相似文献
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A. K. Mansour Mohga M. Eid R. A. Hassan A. Haemers S. R. Pattyn D. A. Vanden Berghe L. Van Hoof 《Journal of heterocyclic chemistry》1988,25(1):279-283
6-Substituted benzyl-4-phenyl-3-thioxo-2,3,4,5-tetrahydro-1,2,4-triazin-5-ones 3a-d were prepared and converted into their corresponding 3-methylthio derivatives 4a-d . Reaction of compounds 4a-d with hydrazine hydrate gave the corresponding 4-amino-3-anilino-4,5-dihydro-1,2,4-triazin-5-ones 5a-d . 6-Substituted benzyl-4-phenyl-2,3,4,5-tetrahydro-1,2,4-triazin-3,5-diones 9a-c were synthesized and allowed to react with hydrazine hydrate to give the corresponding 6-substituted benzyl-4-amino-2,3,4,5-tetrahydro-1,2,4-triazin-3,5-diones 10a-c . The biological evaluation of some of these triazines is described. All compounds were screened for antiviral, antibacterial, antimycobacterial, antifungal and antiyeast activity. No important biological activity was found. 相似文献
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Barbeau OR Cano-Soumillac C Griffin RJ Hardcastle IR Smith GC Richardson C Clegg W Harrington RW Golding BT 《Organic & biomolecular chemistry》2007,5(16):2670-2677
8-Substituted 2-morpholin-4-yl-quinolin-4-ones and 9-substituted 2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-ones with selected aryl and heteroaryl groups as the substituent have been synthesised as potential inhibitors of DNA-dependent protein kinase. A multiple-parallel approach, employing Suzuki cross-coupling methodology, was utilised in the preparation of 8-substituted 2-morpholin-4-yl-quinolin-4-ones. For this purpose 8-bromo-2-morpholin-4-yl-quinolin-4-one was required as an intermediate. This compound was obtained by adapting a literature route in which thermal cyclocondensation of (2-bromoanilino)-morpholin-4-yl-5-methylene-2,2-dimethyl[1,3]dioxane-4,6-dione afforded 8-bromo-2-morpholin-4-yl-quinolin-4-one. A multiple-parallel approach, employing Suzuki cross-coupling methodology, was also utilised to prepare 9-substituted 2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-ones using 9-hydroxy-2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-one O-trifluoromethanesulfonate as an intermediate. 8-Substituted 2-morpholin-4-yl-quinolin-4-ones and 9-substituted 2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-ones were both inhibitors of DNA-dependent protein kinase. When the substituent was dibenzothiophen-4-yl, dibenzofuran-4-yl or biphen-3-yl, IC50 values in the low nanomolar range were observed. Interestingly, the pyridopyrimidinones and quinolinones were essentially equipotent with the corresponding 8-substituted 2-morpholin-4-yl-chromen-4-ones previously reported (I. R. Hardcastle, X. Cockcroft, N. J. Curtin, M. Desage El-Murr, J. J. J. Leahy, M. Stockley, B. T. Golding, L. Rigoreau, C. Richardson, G. C. M. Smith and R. J. Griffin, J. Med. Chem., 2005, 48, 7829-7846). 相似文献
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3-N-Substituted 5-(1Z-carboxymethylene)-2-chloro-4,4-dimethoxycyclopent-2-en-1-ones have been prepared from the corresponding 3-N-substituted 5-allenyl-2,5-dichloro-4,4-dimethoxycyclopent-2-en-1-ones using selective oxidative cleavage of their allene
bond by the RuCl3−NaIO4 system.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1646–1648, September, 1997. 相似文献
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A. A. Avetisyan A. G. Alvandzhyan K. S. Avetisyan 《Russian Journal of Organic Chemistry》2011,47(3):433-436
5,5-Substituted 2-imino-4-methyl-2,5-dihydrofuran-3-carbonitriles reacted with aromatic aldehydes to give the corresponding 5,5-substituted 2-imino-4-(2-R-vinyl)-2,5-dihydrofuran-3-carbonitriles. The latter were converted into hydrochlorides which were hydrolyzed to 3-cyano-4-(2-R-vinyl)-2,5-dihydrofuran-2-ones whose condensation with malononitrile afforded dicyanomethylidene derivatives. 相似文献
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Sirisilla Raju Venkateswara Rao Batchu R. Vasu Dev J. Moses Babu P. Rajender Kumar Pazhanimuthu Annamalai 《Tetrahedron》2006,62(41):9554-9570
We herein report a highly convenient protocol for rapid construction of α-pyrone fused with thiophene. This includes one-pot and regioselective synthesis of 4,5-disubstituted and 5-substituted thieno[2,3-c]pyran-7-ones, 6,7-disubstituted and 6-substituted thieno[3,2-c]pyran-4-ones. The synthesis of thieno[2,3-c]pyran-7-ones involves palladium mediated cross coupling of 3-iodothiophene-2-carboxylic acid with terminal alkynes in a simple synthetic operation. The coupling-cyclization reaction was initially studied in the presence of Pd(PPh3)2Cl2 and CuI in a variety of solvents. 5-Substituted 4-alkynylthieno[2,3-c]pyran-7-ones were isolated in good yields when the reaction was performed in DMF. Similarly, 6-substituted 7-alkynylthieno[3,2-c]pyran-4-ones were synthesized via palladium-catalyzed cross coupling of 2-bromothiophene-3-carboxylic acid with terminal alkynes. A tandem C-C bond forming reaction in the presence of palladium catalyst rationalizes the formation of coupled product in this apparently three-component reaction. The cyclization step of this coupling-cyclization-coupling process occurs in a regioselective fashion to furnish products containing six-membered ring only. This sequential C-C bond forming reaction however, can be restricted to the formation of single C-C bond by using 10% Pd/C-Et3N-CuI-PPh3 as catalyst system in the cross coupling reaction. 5-Substituted thieno[2,3-c]pyran-7-ones were obtained in good yields when the coupling reaction was performed under this condition. Some of the compounds synthesized were tested in vitro for their anticancer activities. 相似文献
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以3-取代氧化吲哚与丙烯酸酯为原料,经Michael加成反应制得中间体--3-丙酸酯取代氧化吲哚(3a~3d); 3a~3d与甲胺发生酰胺化反应制得3 丙酰胺取代氧化吲哚(4a~4d); 4a~4d用氢化铝锂还原-环化,合成了4个六氢吡啶-2,3-并吲哚化合物(5a~5d); 5a和5b用氢化铝锂还原合成了2个六氢吡啶-2,3-并吲哚化合物(6a和6b), 5a~5d, 6a和6b均为新化合物,总产率42%~61%,其结构经1H NMR, 13C NMR和HR-ESI-MS表征。采用MTT法研究了5a~5d, 6a和6b对人肺癌细胞(A549),人前列腺(PC-3)和人白血病细胞(K562)的体外抗肿瘤活性。结果表明:5b对A549, PC 3和K562的抑制活性均较好,其IC50分别为27.2μmol·L-1, 37.5 μmol·L-1和21.7 μmol·L-1。 相似文献
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E.G. Frandsen 《Tetrahedron》1977,33(8):869-873
The reaction of 4- and 5-aryl-3-methylthio-1,2-dithiolylium iodides with 4-hydroxy-6-methyl-2-pyran-2-one and 4-hydroxycoumarin has been studied. 4-Substituted salts yielded 3-aryl-7-methyl-2-thioxo-2,5-pyrano [3,2-c]pyran-5-ones and 3-aryl-2-thioxo-2H,5H-pyrano[3,2-c]benzo[e]pyran-5-ones, respectively, whereas 5-substituted salts gave rise to 3-(5′-aryl-1′,2′-dithiol-3′-ylidene)-6-methyl-2-pyran-2,4-diones and 3-(5′-aryl-1′,2′-dithiol-3′-ylidene)-2-benzo [b]-pyran-2,4-diones. 相似文献