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Copper-mediated 1,4-conjugation reaction of functionalized alkylzinc iodides with derivatives of β-nitrostyrene

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Chinese Chemical Letters 2007年第9期18卷 1040-1042页

作者： Dan Feng huang yu lai hu Jin Xian Wang College of Chemistry & Chemical Engineering Northwest Normal University Lanzhou 730070 China

Functionalized alkylzinc iodides will undergo 1,4-conjugation reaction with derivatives of β-nitrostyrene in the presence of Cu(OAc)2/LiCl to afford a polyfunctional nitro-compound in high yield.

关键词： 1,4-Conjugation reaction Cu(OAc)2/LiCl Organozinc iodide β-Nitrostyrenes

A New Solvent-free Synthesis of a, a'-Dibenzylidenecycloalkanones from Acetals with Cycloalkanones under Microwave Irradiation

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Chinese Chemical Letters 2003年第4期14卷 333-334页

作者： Dan Feng huANG Jin Xian WANG yu lai hu College of Chemistry&Chemical Engineering Northwest Normal UniversityLanzhou 730070

A new rapid synthetic method is described for synthesis of a, a-dibenzylidene- cycloalkanones by the reaction of acetals and cycloalkanones without solvent using BF3稥t2O as catalyst under microwave irradiation.

关键词： Cycloalkanone acetal Lewis acid microwave irradiation.

Synthesis of 2,5-disubstituted tetrahydrofurans from organozinc halides and lactones

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Chinese Chemical Letters 2010年第5期21卷 511-514页

作者： Dan Feng huang Hai Feng Wang Chang Ming Xu Teng Niu yu lai hu College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China

2,5-Disubstituted tetrahydrofurans were obtained from lactones and organozinc halides in moderate to high yield in the presence of Lewis acids.

关键词： Organozinc halides Lactones Lactols 2,5-Disubstituted tetrahydrofurans Lewis acid

Synthesis of N-benzothiazol-2-yl-amides by Pd-catalyzed C(sp^2)–H functionalization

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Chinese Chemical Letters 2015年第11期26卷 1376-1380页

作者： Jun-Ke Wang Ying-Xiao Zong Xi-Cun Wang yu-lai hu Guo-Ren yue Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities College of Chemistry and Chemical Engineering Hexi University Gansu Key Laboratory of Polymer Materials College of Chemistry and Chemical Engineering Northwest Normal University Gansu Engineering Laboratory of Applied Mycology Hexi University

A catalytic synthesis of N-benzothiazol-2-yl-amides from 1-acyl-B-（phenyl）thioureas was achieved in the presence of a palladium catalyst through the C（sp2）-H functionalization/C-S bond formation, This synthetic me... 详细信息

关键词： BenzothiazolePal-catalyzed1 -Acyl-3 -phenylthioureaC-H functionalizationL-Proline

Synthesis of O-glycosylα-aryl nitrones

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Chinese Chemical Letters 2010年第9期21卷 1075-1078页

作者： Ying Fu huai yuan Zhang Yan hua Liu Xue Feng Li Dan Feng huang yu lai hu Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education Key Laboratory of Polymer Material of Gansu Province College of Chemistry & Chemical Engineering Northwest Normal University Lanzhou 730070 China

α-Aryl nitrone are one of the most useful kinds of nitrones and have been extensively explored in recent ***,the sugar moieties have not been introduced into these molecules *** presented here an efficient synthesis ofα-aryl nitrone Oglycosides via condensation of N-substituted hydroxylamine and aryl aldehydes glycosides in benzene.

关键词： Nitrones Glycosides Aryl aldehyde Hydroxylamine Synthesis

Solvent free synthesis of trifluoromethyl tertiary alcohols by cross Aldol reaction

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Chinese Chemical Letters 2015年第8期26卷 1046-1049页

作者： Rui Tao Xue-Jiao Yin Ke-hu Wang yu-Zhuo Niu Ya-Lin Wang Dan-Feng huang Ying-Peng Su Jin-Xian Wang yu-lai hu Ying Fu Zheng-Yin Du College of Chemistry and Chemical Engineering Northwest Normal University

Exceedingly fast preparation of trifluoromethyl tertiary alcohols has been accomplished from methyl ketones and trifluoromethyl ketones under solvent free conditions by cross Aldol reaction. The reaction was achieved in the presence of common inorganic base by grinding method at ambient temperature to give b-trifluoromethyl-b-hydroxyl ketones in high yields（up to 95%）.

关键词： alcohols tertiary ambient hydroxyl inorganic smoothly accomplished silica heterocyclic reagent

Synthesis and Structure of 1,2-O-(1-Aryl-1-Propylidene)-D-Mannitol

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Chinese Chemical Letters 1997年第12期8卷 0-0,0-0页

作者： Jian hua yu yu lai hu Wen Fei TAN Shi Yan YANG yuan Qi YIN(State Key Laboratory for Oxo Synthesis and Selective Oxidation)(Lanzhou Insrtitute of Chemical Phaics, Chinese Academy of Sciences, Lanzhou 730000) State Key Lab. Oxo Synthesis/S.O. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

A method for selective reaction of 1-aryl-propane-1-ones with 1,2-dihydrxy grop of D-mannitol in the presence of ZnCl2-BF3 Et2O to 1, 2_O-(1-aryl- propylidene )-D-mannitol (1-4 ) is described. The compounds were first... 详细信息

关键词： Synthesis and Structure of 1,2-O D-Mannitol Aryl-1-Propylidene

Conjugate Addition Reactions of Functionalized Organozinc-copper Reagents to α,β-Unsaturated Esters

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Chinese Chemical Letters 1998年第8期9卷 699-700页

作者： yu lai hu Jian hua yu Shi Yan YANG yuan Qi YIN Tian Quan JIAO Jin Xian WANG(State. Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of sciences, Lanzhou 730000)(Department of Chemistry, State Key Lab. Oxo Synthesis/S.O. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Department of Chemistry Lanzhou University Lanzhou 730000 China Department of Chemistry Northwest Normal University Lanzhou 730070 China

Functionalized organozinc reagents can easily conduct 1,4-addition reaction with unsaturated esters in the presence of Cu(OAc)2 and LiCl under very Anld conditions to give the products in excellent yields.

关键词： conjugate addition reaction organozinc reagents α,β-unsaturated esters

Nickel (Ⅱ) Complex Catalyzed Conjugate Addition Reaction of Functionalised Organozinc Reagents to α,β -Unsaturated Esters

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Chinese Chemical Letters 1999年第1期10卷 17-18页

作者： yu lai hu Jian hua yu Shi Yan YANG yuan Qi YIN Jin Xian WANG(State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics. Chinese Academy of Sciences, Lanzhou 730000)(Department of Chemistry, Northwest Normal U

Functionalized organozinc reagents can easily under 1, 4-addition reaction withunsaturated esters in the presence of catalytic amount of Ni (acac)_2 and tertiary ammes under verymild conditions to give the products in... 详细信息

关键词： Conjugate addition reaction organozinc reagents α,β-unsaturated esters,nickel complex catalysis