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Chemical Research in Chinese Universities 2011年第1期27卷 49-53页

作者： CHEN Jiao SHI Jian YAN Chao-guo College of Chemistry ＆ Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

The 1,4-diazabicyclo[2.2.2]octane（DABCO） catalyzed reaction of cyclohexane-1,3-dione or dimedone with various aldehydes in acetonitrile resulted in the polysubstituted tetraketones, spiro dihydrofurans or 1,8-dioxo-... 详细信息

关键词： Tandem reaction dimedone Spiro dihydrofuran Tetraketone 1,8-Dioxo-xanthene

Synthesis of Antipyrine Derivatives Derived from dimedone

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Chinese Journal of Chemistry 2007年第4期25卷 570-573页

作者： EIASHRY E. S. H. AWAD L. F. IBRAHIM E. I. BDEEWY O. Kh. Chemistry Department Faculty of Science Alexandria University Alexandria Egypt Suez Cannel University lsmailia Egypt

Coupling of dimedone with the diazonium salt of 4-aminoantipyrine afforded 2,3-dimethyl-4-[2-（5,5-dimethyl- 2,6-dioxocyclohex-2-ylidend）-hydrazino]-5-oxo-1-phenylpyrazoline （3）. Reaction of 3 with excess phenylhydrazine gave the mixed trishydrazone derivative 4. Treatment of 3 with hydroxylamine produced the bisoxime 5 which upon dehydrative cyclization with acetic anhydride gave the corrsponding tetrahydrobenzo[d][1,2,3]triazole derivative 7. A one-pot synthesis of 7 was done by reacting 3 with hydroxylamine hydrochloride in pyridine, followed by heatment with acetic anhydride.

关键词： dimedone antipyrine 1,2,3-triazole phenylhydrazone

Synthesis of 2,2'-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) in aqueous medium at room temperature

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Chinese Chemical Letters 2009年第6期20卷 656-659页

作者： Mohammad Bayat Hossien Imanieh Seydeh Hajar Hossieni Chemistry Department Imam Khomeini International University

The reaction of dimedone with various aromatic aldehydes produces 2,2＇-arylmethylene bis （3-hydroxy-5,5-dimethyl-2- cyclohexene-l-one） in excellent yields. The reactions occur in water as solvent at room temperature and avoiding the addition of any catalyst. The workup procedure is very simple and the products do not required further purification.

关键词： dimedone Water Environmentally benign synthesis Aromatic aldehydes Uncatalysed reaction

Alum （KAI（SO4）2·12H2O） Catalyzed Multicomponent Transformation： Simple, Efficient, and Green Route to Synthesis of Functional- ized Spiro[chromeno[2,3-d]pyrimidine-5,3＇-indoline]-tetraones in Ionic Liquid Media

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Chinese Journal of Chemistry 2012年第3期30卷 709-714页

作者： Mirhosseini Moghaddam, Mojtaba Bazgir, Ayoob Mohammad Mehdi, Akhondi Ghahremanzadeh, Ramin Nanobiotechnology Research Center Avicenna Research Institute ACECR Tehran Iran Department of Chemistry Shahid Beheshti University Tehran Iran Reproductive Research Center Avicenna Research Institute ACECR Tehran Iran

The combination of isatin, barbituric acid, and cyclohexane-1,3-dione derivatives in the presence of alum （KAI（SO4）2· 12H2O） as a catalyst for 15 min was found to be a suitable and efficient method for the synthe... 详细信息

关键词： isatin spirooxindoles dimedone barbituric acid ionic liquids

A rapid and efficient method for the synthesis of 14H-dibenzo[α.j]xanthenes,aryl-5H-dibenzo[b.i]xanthene-5,7,12,14-(13H)-tetraone and 1,8-dioxooctahydroxanthenes by acidic ionic liquid

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Chinese Chemical Letters 2010年第7期21卷 761-764页

作者： Abbas Rahmati Department of Chemistry University of IsfahanP.O.Box 81746-7344IsfahanIran

Various xanthenes have been synthesized by the condensation ofβ-naphthol,2-hydroxynaphthalene-1,4-dione or dimedone with various aldehydes in the presence of trifluoroacetic acid as catalyst in 1,1,3,3-N,N,N′,N′-te... 详细信息

关键词： Ionic liquid 14H-Dibenzo[α.j]xanthenes β-Naphthol 2-Hydroxynaphthalene-1 4-dione dimedone

Clean synthesis of 1,8-dioxooctahydroxanthenes promoted by DABCO-bromine in aqueous media

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Chinese Chemical Letters 2010年第10期21卷 1180-1182页

作者： Mohammadali Bigdeli Faculty of Chemistry Tarbiat Moallem University

An efficient procedure is reported for the synthesis of 3,3,6,6-tetramethyl-9-aryl-1,8-dioxooctahydroxanthenes using a one-pot condensation of arylaldehydes and 5,5-dimethyl-l,3-cyclohexandione in the presence of DABCO-bromine （TDB） as an acid catalyst. To the best of our knowledge this is the first time that DABCO-bromine is used as an acid catalyst in aqueous media for this type of reaction. This method provides several advantages such as use of water as solvent, easy and clean synthesis, simple work up and versatility.

关键词： 1,4-Diazabicyclooctane (DABCO)-bromine Octahydroxyxanthene Aqueous media Arylaldehyde dimedone

An efficient synthesis of 2,2′-arylmethylene bis-(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) and 1,8-dioxooctahydroxanthenes using ZnO and ZnO-acetyl chloride

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Chinese Chemical Letters 2010年第6期21卷 686-689页

作者： Malek Taher Maghsoodlou Sayyed Mostafa Habibi-Khorassani Zahra Shahkarami Nariman Maleki Mohsen Rostamizadeh Department of Chemistry The University of Sistan and BaluchestanP.O.Box 98135-674ZahedanIran

2,2'-Arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) 4l-s produced from reaction between dimedone with various aldehydes in acetonitrile using ZnO as a catalyst;whereas in the presence of ZnO-acetyl chlo... 详细信息

关键词： ZnO ZnO-acetyl chloride dimedone Aldehyde 1 8-Dioxooctahydroxanthene 2 2'-Arylmethylene bis(3-hydroxy-5 5-dimethyl-2-cyclohexene-1-one)

Cerium(Ⅳ) ammonium nitrate catalysed facile and efficient synthesis of polyhydroquinoline derivatives through Hantzsch multicomponent condensation

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Chinese Chemical Letters 2008年第7期19卷 775-779页

作者： Cherkupally Sanjeeva Reddy Mekala Raghu Department of Chemistry Kakatiya UniversityWarangal 506009India

A general and convenient practical approach for the synthesis of polyhydroquinoline derivatives has been achieved via one-pot four-component Hantzsch condensation of aromatic aldehydes, dimedone, ethyl acetoacetate and ammonium acetate in the presence of a catalytic amount of cerium（IV） ammonium nitrate （CAN）, in ethanol solvent at ambient temperature. Simple work-up, mild reaction conditions, inexpensive and non-toxic catalyst, and excellent product yields are the advantageous features of this method.

关键词： Aldehydes dimedone Ethyl acetoacetate Ammonium acetate CAN Polyhydroquinolines

Microwave-prompted Reaction of Cinnamonitrile Derivatives with 5,5-Dimethyl-1,3-cyclohexanedione

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Chinese Journal of Chemistry 2002年第7期20卷 703-706页

作者：屠树江缪春宝高原冯友健冯骏材 Department of Chemistry Xuzhou Normal University Xuzhou Jiangsu 221009 China Department of Chemistry Shenzhen University Shenzhen Guangdong 518060 China Department of Chemistry Nanjing University Nanjing Jiangsu 210093 China

In the reactions of α-cyanocinnamonitrile or β-cyano-β-carbo-thoxy styrenewith 5,5-dimethyl-1,3-cyclohexanedione in the presence of ammonium acetate under microwaveirradiation without solvent, the2-amino-5,6,7,8-tetrahydro-5-oxo-4-aryl-7,7-dimethyl-4H-benzo-[b]-pyran derivatives were ***, in the reactions of arylidenecyanoacetamide with 5,5-dimethyl-1,3-cyclohexanedione underthe same reaction conditions, the acridine derivatives were obtained. The structures of the productswere determined by single crystal X-ray diffraction analysis.

关键词： cinnamonitrile dimedone microwave

Multicomponent synthesis of dihydropyridines catalyzed by L-proline

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Chinese Chemical Letters 2011年第5期22卷 531-534页

作者： Leila Zare Mohammad Nikpassand Department of Organic Chemistry Islamic Azad University-Rasht BranchRashtIran

Multicomponent synthesis of mono and bis 4-substituted-1,4-dihydropyridines from aldehydes,dimedone and ammonium acetate in the presence of an efficient recyclable catalyst,L-proline,in high yield and short reaction t... 详细信息

关键词： Multicomponent Dihydropyridines dimedone L-Proline