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Mono-Allylation of Gem-Diacetates with Allylsamarium Bromide

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Chinese Chemical Letters 2001年第11期12卷 943-944页

作者： Xiao Xia WANG yong min zhang Department of Chemistry Zhejiang University(Xixi Campus)Hangzhou 310028 Laboratory of Organometallic Chemistry Chinese Academy of SciencesShanghai 200032

The substitution reaction between gem-diacetates and allylsamarium bromide was investigated, and homoallylic alcohol acetates were obtained in moderate to good yields.

关键词： gem-diacetates substitution monoallylation allylsamarium bromide

Synthesis of Enamines via the Cross-coupling of Thioamides and Diarylketones Promoted by the Sm/SmI_(2)Mixed Reagent

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Chinese Chemical Letters 2006年第1期17卷 1-4页

作者： Wei min ZHU Zhi Fang LI yong min zhang Department of Chemistry Zhejiang University Xixi Campus Hangzhou 310028 State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

Enamines, promoted by the samarium/samarium diiodide mixed reagent, were synthesized via the cross-coupling of thioamides and diarylketones in good yields.

关键词： Samarium enamines cross-coupling thioamides diarylketones.

The Reductive Addition Reaction of Substituted 2-Chloromethyl-1,3,4-oxadiazole to Aldehydes and Ketones Promoted by Samarium Diiodide

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Chinese Chemical Letters 2005年第12期16卷 1566-1568页

作者： Xiao Liang XU Wei min ZHU yong min zhang Department of Chemistry Zhejiang University Xixi Campus Hangzhou 310028 State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

1-（β-Hydroxyalkyl）-l,3,4-oxadiazole derivatives were synthesized via reductive addition reactions of 2-chloromethyl-l,3,4-oxadiazole with carbonyl compounds under mild conditions promoted by SmI2.

关键词： Reductive addition samarium diiodide 1-(β-hydroxyalkyl)-1 3 4-oxadiazole deriva-tives synthesize

Reductive Cleavage of the Se-Se Bond by the Sm-CdCl_2-HMPA System: A New One-Pot Method for the Synthesis of Selenoesters

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Chinese Chemical Letters 1999年第12期10卷 987-988页

作者： Xiao Liang XU Ping LU yong min zhang Department of Chemistry Zhejiang University(Xixi campus)Hangzhou 310028

Treatment with Sin-CdCI2-HMPA system, dibenzyl and diphenyl diselenides react withacyl handes and acid anhydrides in one-pot to give corresponding selenoesters in good yields undermild and neutral conditions.

关键词： Samarium cadmium choloride diselenide selenoester.

Facile and Stereoselective Synthesis of N-Substituted Benzotriazole with Baylis-Hillman Adducts

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Chinese Chemical Letters 2006年第7期17卷 877-879页

作者： Jian LI Yun Kui LIU yong min zhang Department of Chemistry Shanghai University Shanghai 200436 Department of Chemistry Zhejiang University Xixi Campus Hangzhou 310028 State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Catalytic Hydrogenation Research Center Zhejiang University of Technology Hangzhou 310014 State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

A convenient method has been developed toward the stereoselective synthesis of N-substituted benzotriazole derivatives under mild conditions. The good stereolectivity, high yields and the simple procedure make the pre... 详细信息

关键词： Benzotriazole N-substituted Baylis-Hillman adduct.

A New Approach to 2,3-Dihydro-1H-1,5-Benzodiazepines from the Reaction of o-Nitrophenylazide with α,β-Unsaturated Ketones Promoted by Samarium Diiodide

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Chinese Chemical Letters 2001年第1期12卷 5-6页

作者： Xiao Yuan CHEN Wei Hui ZHONG yong min zhang Department of Chemistry Zhejiang University at Xixi CampusHangzhou 310028 Laboratory of Organometallic Chemistry Chinese Academy of SciencesShanghai 200032 Department of Chemistry Hunan Jishou UniversityJishou416000

o-Nitrophenylazide was reduced by SmI2 in anhydrous THF at room temperature to produce active intermediate 2 (samarium amide), "living" double-anion in situ which reacted smoothly with α，β-unsaturated ketones to af... 详细信息

关键词： Samarium diiodide reduction nitro group azide 2 3-dihydro-1H-1 5-benzodiazepine.

Tetrahydrofuran Ring Opening with Acyl Chlorides or Anhydrides Catalyzed by Gallium Triiodides: A Novel and Facile Method for the Preparation of Iodo Esters

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Chinese Chemical Letters 2000年第3期11卷 191-194页

作者： Hua Yue WU Ren Er CHEN yong min zhang WenZhou Normal college Wenzhou 325000 Department of Chemistry Zhejiang University at Xixi CampusHangzhou 310028

Tetrahydrofuran ring can be opened with acyl chlorides or anhydrides catalyzed by gallium triiodides to afford iodo esters under mild conditions in good yields.

关键词： tetrahydrofuran ring acyl chloride anhydride gallium triiodides

Reduction of Elemental Selenium by Samarium Diiodide: the Synthesis of Dithiodiselenides and Dithioselenides

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Chinese Chemical Letters 2001年第5期12卷 379-382页

作者： Hong Yun GUO Yun Fa ZHENG yong min zhang Department of Chemistry Zhejiang University at Xixi CampusHangzhou 310028 Department of Chemistry Zhejiang Normal UniversityJinhua 321004 Department of Chemistry Lishui Teachers CollegeZhejiang 323000

The reduction of elemental selenium by samarium diiodide led to selective formation of selenolate anion species (Se-2(2-) and Se2-), these nucleophilic species reacted readily with sodium alkyl thiosulfates to afford ... 详细信息

关键词： Synthesis samarium diiodide dithiodiselenides dithioselenides.

Synthesis of two mono-deoxy β-cyclodextrin derivatives as useful tools for confirming DIBAL-H promoted bis-de-O-methylation mechanism

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Chinese Chemical Letters 2012年第12期23卷 1315-1318页

作者： Su Long Xiao De min Zhou ming Yang Fei Yu Li He zhang Pierre Sinay yong min zhang State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking University Institut Parisien de Chimie Moleculaire UMR CNRS 7201Universite Pierre et Marie Curie-Paris 64 Place Jussieu Institute for Interdisciplinary Research Jianghan UniversityWuhan Economic and Technological Development Zone

Diisobutylaluminium hydride （DIBAL-H） promotes secondary rim regioselective bis-de-O-methylation of permethylated β- cyclodextrin （β-CD） to give diol 2. To gain an insight into the mechanism of this remarkable regioselective behavior, two corresponding permethylated β-CDs with an alcohol function at either 2- or 3-position were synthesized in our previous study. As a step further to this work, the two compounds were subjected to deoxygenation reaction with tributyltin hydride in the present of 2,2＇- azobisisobutyronitrile affording the corresponding 2- and 3-deoxy permethylated β-CD derivatives （19 and 16）. The structures of these two compounds were characterized by 1D and 2D NMR and HRMS. Compounds 16 and 19 were unable to react with DIBAL- H which suggests that O-2A and O-3B are necessary for DIBAL-H promoted bis-de-O-methylation reaction of permethylated β-CD.

关键词： Cyclodextrin (CD) DIBAL-H Deoxy Synthesis Mechanism