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Akbar Mobinikhaledi Naser Forughifar Jil A. Alipour Safari EhsaN. Amini 《Journal of heterocyclic chemistry》2007,44(3):697-699
A series of oxo‐ and thioxopyrimidines 4 ( a‐m ) were synthesized by one‐pot three components cyclocondensation reaction of β‐ketoester, aldehyde and urea/thiourea using benzyltriethylammonium chloride as a catalyst under solvent‐free conditions. The yields of products following recrystallization from ethanol were of the order of 65‐87%. IR and 1HNMR spectroscopy and elemental analysis were used for identification of these compounds. 相似文献
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Aihua Wang Yan Zhang Songfeng Lu William V. Murray Gee‐Hong Kuo 《Journal of heterocyclic chemistry》2010,47(6):1406-1410
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Gunther Buehrdel Rainer Beckert Birgit Friedrich Helmar Goerls 《Journal of heterocyclic chemistry》2008,45(3):845-851
The cyclization reactions between bis‐imidoylchlorides 1 and ketones, which possess different CH‐acidity, were investigated. Diphenylacetone 2 reacts under mild conditions via C,O‐cyclization of the preformed enolate to yield the iminofurane derivative 3 . Upon treatment with trifluoroacetic acid, the latter can be rearranged quantitatively into the pyrrolone 5 . In contrast, 1,3‐acetonedicarboxylate 9 and cyclohexanone 12 immediately lead to highly substituted pyrrolones 11 and 14 . Obviously, the primarily formed cyclization products undergo a very fast 1,3‐acyl rearrangement (Dimroth‐/Mumm‐Rearrangement). The structures of the maleiimide 11 and the indolone 14 were determined by single crystal X‐ray structure analysis. Due to its amino/imino substructure, compound 3 is an efficient ligand for metal complexation reactions, exemplified by the synthesis of two different Zn‐complexes 7 and 8 . 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
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