中国科技论文在线

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2005年03月25日

【期刊论文】A novel reduction of sodium alkyl thiosulfates using samarium metal without an activating agent in water

王磊， Lei Wang， b， * Pinhua Li a and Li Zhou a

Tetrahedron Letters Pergamon 43(2002)8141-8143，-0001，（）：

-1年11月30日

A novel metallic samarium promoted reduction of sodium alkyl thiosulfates in the absence of an activating agent occurs to afford the corresponding disulfides with good yields in water at 90℃.

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2005年03月25日

【期刊论文】Novel Reductive Coupling Cyclization of 1, 1-Dicyanoalkenes Promoted by Metallic Samarium in Aqueous Media

王磊， Lei Wang and Yongmin Zhang*

Tetrahedron Letters 39(1998)5257-5260，-0001，（）：

-1年11月30日

摘要

The reductive coupling cyclization of 1, 1-dicyanoalkenes was performed with metallic samarium in saturated aqueous NH4C1-THF solution at room temperature. Sub-stoichiometric quantities of samarium could be employed and trans-isomer was the major product.

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2005年03月25日

【期刊论文】A novel preparation of methyl ketones through one-carbon homologation of aldehydes

王磊， Lei Wang， a， b， * Pinhua Li， a Jincan Yana and Zhongzhi Wuc

Tetrahedron Letters Pergamon 44(2003)4685-4688，-0001，（）：

-1年11月30日

摘要

A novel two-step aldehyde homologation procedure for the preparation of methyl ketones has been developed, which involves the use of 1,1-dibromo-1-alkenes as precursors and zinc metal as mediator in near-critical water.

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2005年03月25日

【期刊论文】Unexpected Chemoselective Debromination and Reduction of 1,1-Dibromo-1-alkenes Mediated by Samarium Metal in Methanol

王磊， Lei Wang， *a， b Pinhua Li， a Yuanyuan Xie， a Yanbin Ding a

Synlett 2003, No.8, 1137-1140，-0001，（）：

-1年11月30日

摘要

An unexpected samarium metal mediated chemoselective debromination and reduction of 1,1-dibromo-1-alkenes in methanol has been developed, which generates vinyl monobromides, alkenes, and alkanes respectively with appropriate molar ratio of samarium to 1,1-dibromo-1-alkene.

samarium metal,， 1,， 1-dibromo-1-alkenes,， debromination,， reduction,， methanol

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2005年03月25日

【期刊论文】Microwave-enhanced Mannich Condensation of Terminal Alkynes, Primary Amines With Paraformaldehyde on Cuprous Iodide Doped Alumina under Solvent Free Conditions

王磊， WANG， Lei*， a， b， LI， Pin-Hua a

CHINESE JOURNAL OF CHEMISTRY 2003, 21, 710-713，-0001，（）：

-1年11月30日

摘要

A microwave-enhanced, solventless Mannich condensation of terminal alkynes, primary amines with paraformaldehyde on cuprous iodide doped alumina has been investigated. The struc-tures of products depend on the ratio of alkyne to amine and paraformaldehyde.

Mannich condensation,， terminal alkyne,， paraform-aldehyde,， primary amine,， coprous iodide,， alumina,， solvent free,， microwave irradiation

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