Metallic samarium promoted reductive dimerization cyclization of gem-diactivated alkenes, reductive debromination of vic-dibromides, and reduction of sodium alkyl thiosulfates in aqueous media
作者:Lei Wang、Yongmin Zhang
DOI:10.1016/s0040-4020(99)00602-x
日期:1999.8
solution at room temperature, metallic samarium promoted reductive dimerization cyclization of gem-diactivated alkenes, reductive debromination of vic-dibromides, and reduction of sodium alkyl thiosulfates occur to afford corresponding functionalized cyclopentenes, (E)-alkenes, and disulfides, respectively in good yield. Only sub-stoichiometric quantities of samarium are employed in the former reactions
Polysiloxane-Supported NAD(P)H Model 1-Benzyl-1,4-dihydronicotinamide: Synthesis and Application in the Reduction of Activated Olefins
作者:Baolian Zhang、Xiao-Qing Zhu、Jin-Yong Lu、Jiaqi He、Peng G. Wang、Jin-Pei Cheng
DOI:10.1021/jo020319x
日期:2003.4.1
A new polysiloxane-supported NAD(P)Hmodel, 1-benzyl-1,4-dihydronicotinamide, was designed and synthesized, which can efficiently reduce many activated olefins under mild conditions. The most advantageous features of this new polysiloxane-supported reductant are (i) easy workup and separation of the reaction products and (ii) good potential for recycling use of the reductant, which makes this new
Zinc-mediated Reductive Dimerization Cyclization of Ethyl Arylmethylidene cyanoacetates in Aqueous Media
作者:Lei Wang、Yongmin Zhang
DOI:10.1039/a900711c
日期:——
Zinc-mediated reductive dimerization–cyclization of ethyl arylmethylidenecyanoacetates occurs to give diethyl 2-amino-3-cyano-4,5-diaryl-1,3-cyclopentenedicarboxylates in moderate to good yields the trans, trans-form isomer being the major product.
The zwitterion formed from triphenylphosphine and DMAD adds to electron-deficient styrenes to form stable cyclopentenyl phosphoranes. This is the first example of such a zwitterion in which the phosphine is incorporated into the product
[EN] HETEROAROMATIC UREA DERIVATIVES AS VR-1 RECEPTOR MODULATORS FOR TREATING PAIN<br/>[FR] DERIVES HETEROAROMATIQUES D'UREE EN TANT QUE MODULATEURS DU RECEPTEUR VR-1 POUR TRAITER LA DOULEUR
申请人:MERCK SHARP & DOHME
公开号:WO2003080578A1
公开(公告)日:2003-10-02
The present invention provides compounds of formula (I); pharmaceutically acceptable salts and N-oxides thereof in which A, B, D and E are C or N with the proviso that one or more are N, R1, R2, R3, R4, R5 and R6 are simple substituents, n is 0-3 and y is an aryl, heteroaryl, carbocyclyl or fused-carbocyclyl group; as VR-1 antagonists for treating conditions or diseases in which pain and/or inflammation predominates; the use of the same for manufacturing medicaments, pharmaceutical compositions comprising them and methods of treatment utilising them.