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A series of novel title compounds have been designed and synthesized by a multi‐step reaction, the stereochemistry of the reaction was investigated, the structures of all compounds prepared have been confirmed by 1H NMR, IR, EI‐MS spectroscopy and elemental analysis. The crystal structures of cis 6b and trans 6b were determined by single crystal X‐ray diffraction. The results of preliminary bioassay indicate that some compounds possess a certain extent inhibition effect against aphides at the concentration of 250 ppm. 相似文献
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Boris A. Trofimov Lyubov' N. Sobenina Al'bina I. Mikhaleva Ol'Ga V. Petrova Vladislav N. Drichkov Igor A. Ushakov Ol'Ga A. Tarasova Darya‐Suren D. Toryashinova Yuriy Yu. Rusakov Leonid B. Krivdin 《Journal of heterocyclic chemistry》2007,44(3):505-513
2‐(2‐Cyano‐1‐ethylthioethenyl)pyrroles are readily coupled (50–55°) with primary and secondary amines at the position 1 of the ethenyl moiety to eliminate ethanethiol and afford 2‐(1‐amino‐2‐cyanoethenyl)pyrroles and/or their cyclic isomers ‐ functionalized 1‐amino‐3‐iminopyrrolizines in good to high yields. 相似文献
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Sivaperuman Saravanan Arumugam Nithya Shanmugam Muthusubramanian 《Journal of heterocyclic chemistry》2006,43(1):149-155
The synthesis of a new set of selenadiazoles, 4‐aryl‐5‐(1‐aryl‐2‐methyl‐2‐nitropropyl)‐1,2,3‐selenadiazoles ( 4 ) derived from 2‐[4‐methyl‐4‐nitro‐1,3‐diarylpentylidene]‐1‐hydrazinecarboxamide ( 3 ) has been reported. THF has been found to be the solvent of choice for this reaction. Structural features of 3 and 4 have been analyzed by NMR and X‐ray techniques. 相似文献
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Ganesabaskaran Sivaprasad Radhakrishnan Sridhar Paramasivan T. Perumal 《Journal of heterocyclic chemistry》2006,43(2):389-394
A selective and easy method is described for the synthesis of 4,5‐dihydro‐2H‐benzo[g]indazoles and 8,9‐dihydro‐2H‐benzo[e]indazoles by the Vilsmeier‐Haack reaction of various tetralone phenylhydrazones under thermal and microwave irradiation conditions. 相似文献
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Shujiang Tu Qian Wang Yan Zhang Jianing Xu Jinpeng Zhang Xiaotong Zhu Feng Shi 《Journal of heterocyclic chemistry》2006,43(6):1647-1651
A series of N‐carboxymethylacridine‐1,8‐dione derivatives were synthesized by one‐pot reaction of aldehyde, dimedone and glycine in glycol under microwave irradiation without catalyst with excellent yields (78‐92%) and short reaction time (4‐8min). And the reaction was not only suitable for aromatic monoaldehyde, but also aromatic dialdehyde. 相似文献
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A general synthesis of 6‐azaoxindoles, substituted in the 3‐ and 5‐position, has been developed starting from 4‐methoxycarbomethyl‐3‐nitropyridine, via hydrogenation of the nitro group and cyclisation of the resulting 3‐amino‐4‐methoxycarbomethyl‐pyridine. 相似文献
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A concise and efficient synthetic approach to 3‐arylaminopyrroline‐2‐ones from anilines and β,γ‐unsaturated α‐ketoesters in boiling dichloromethane has been developed. This protocol possesses many advantages such as short reaction time, high isolated yields, and expanding substrate scopes. According to the isolated intermediates and controlled reactions, the reaction was tentatively proposed to involve the Michael addition/condensation and subsequent intramolecular cyclization. The structures of the title compounds were unambiguously confirmed by various spectral data such as X‐ray crystallographic analysis. 相似文献
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Fangfang Jian Hailian Xiao Chongyi Zhu Liangzhong Xu 《Journal of heterocyclic chemistry》2006,43(4):925-929
Seven 1,2,4‐triazole compounds containing the N,N‐dialkyldithiocarbamate group were designed and synthesized. Their structures were identified using infrared spectroscopy, element analysis, 1H NMR spectroscopy and mass spectrometry, and in two cases by single crystal X‐ray diffraction. The result of the biological test showed that the seven compounds all have fungicidal and plant growth‐regulating activities. 相似文献
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Yi‐Feng Wang Wei‐Min Liu You‐Quan Zhu Xiao‐Mao Zou Fang‐Zhong Hu Hua‐Zheng Yang 《Journal of heterocyclic chemistry》2006,43(5):1275-1280
A series of novel 6,7,8,9‐tetrahydro‐2‐(2‐aryloxypyrimidin‐4‐yl)‐2H‐[1,2,4]triazolo[4,3‐a]azepin‐3(5H)‐ones were designed and efficiently synthesized. Their structures were determined by IR, 13C and 1H NMR, mass spectroscopy, and elemental analysis. These compounds were screened for herbicidal activities against rape and barnyard grass. Compounds 5a‐5f and 5m exhibited moderate herbicidal activity against rape. In addition, the synthesis of the intermediate 1‐(azepan‐2‐ylidene)‐2‐(2‐chloropyrimidin‐4‐yl)‐hydrazine ( 3 ) was studied and the reason for the low yield in the initial procedure is discussed as well. 相似文献
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Lucina Arias Hactor Salgado‐Zamora Elena Campos Alicia Reyes Humberto Cervantes Edward C. Taylor 《Journal of heterocyclic chemistry》2006,43(3):565-569
In some nucleophilic substitution reactions of 2‐cyano‐3‐nitroimidazo[1,2‐a]pyridine, nitrogen (alkylamines, guanidine) and oxygen nucleophiles (alkoxides) underwent substitution of the 2‐cyano group, while sulfur nucleophiles (alkylthiols) underwent substitution of the 3‐nitro group. 相似文献
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A facile and rapid synthesis of the title compounds via one‐pot reaction of 2‐aminobenzonitrile, orthoesters and ammonium acetate under solvent‐free and microwave condition is described. 相似文献
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Srinivas Kantevari C. K. Snehalatha Nair M. Pardhasaradhi 《Journal of heterocyclic chemistry》2006,43(5):1353-1356
Practical synthesis of 5‐(4′‐methylbiphenyl‐2‐yl)‐1H‐tetrazole, key intermediate in several angiotensin II receptor antagonists from 2‐fluorobenzonitrile in excellent yields and very high purity is described. 相似文献
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Wei‐Min Liu You‐Quan Zhu Yi‐Feng Wang Bin Liu Xiao‐Mao Zou Hua‐Zheng Yang 《Journal of heterocyclic chemistry》2007,44(4):967-971
A series of 2‐(3‐(trifluoromethyl)‐5‐(alkoxy)‐1H‐pyrazol‐1‐yl)‐4‐aryloxypyrimidine derivatives were designed and synthesized. The structures of all the title compounds were confirmed by 1H NMR and elementary analysis. These compounds were screened for herbicidal activity against rape and barnyard grass. Compound B13 exhibited moderate herbicidal activity. 相似文献
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Ahmad Shaabani Abbas Rahmati Jafar Moghimirad 《Journal of heterocyclic chemistry》2008,45(6):1629-1632
A solvent‐ and catalyst‐free one‐pot three‐component condensation reaction approach was developed for the synthesis of a new class of 3‐(2′‐benzothiazolyl)‐2,3‐dihydroquinazolin‐4(1H)‐ones in relatively good yields. 相似文献