Stereoselective Synthesis of Enynes by Nickel-Catalyzed Cross-Coupling of Divinylic Chalcogenides with Alkynes
摘要:
(Z,Z)- and (E,E)-divinylic selenides and telurides undergo direct coupling with terminal alkynes in the presence of a nickel/CuI catalyst at room temperature to give (Z)- and (E)-enyne systems in good yields and with complete retention of configuration.
Vinyl alkyl selenides can be dealkylated by nucleophilicsubstitution or by electron transfer to give vinyl selenide anions which retain the configuration of the starting products. The same anions are also produced by electron transfer from vinyl acetyl selenides. The vinyl selenide anions react with vinylhalides, in DMF or DMA, to give divinyl selenides. These reactions occur with retention of configuration
Preparation and nickel-catalyzed coupling reactions of divinylic selenides
作者:Claudio C. Silveira、Paulo Cesar S. Santos、Antonio L. Braga
DOI:10.1016/s0040-4039(02)01773-2
日期:2002.10
The preparation of divinylic selenides by the reaction of selenium bis-phosphonate with aromatic aldehydes is described. The nickel-catalyzed cross coupling of the divinylic selenides with Grignard reagents was also studied. (C) 2002 Elsevier Science Ltd. All rights reserved.
TESTAFERRI, L.;TIECCO, M.;TINGOLI, M.;CHIANELLI, D., TETRAHEDRON, 1986, 42, N 1, 63-69
作者:TESTAFERRI, L.、TIECCO, M.、TINGOLI, M.、CHIANELLI, D.
DOI:——
日期:——
Stereoselective Synthesis of Enynes by Nickel-Catalyzed Cross-Coupling of Divinylic Chalcogenides with Alkynes
作者:Claudio C. Silveira、Antonio L. Braga、Adriano S. Vieira、Gilson Zeni
DOI:10.1021/jo0261707
日期:2003.1.1
(Z,Z)- and (E,E)-divinylic selenides and telurides undergo direct coupling with terminal alkynes in the presence of a nickel/CuI catalyst at room temperature to give (Z)- and (E)-enyne systems in good yields and with complete retention of configuration.
Study on the Stereoselective Reactions of Vinyl(phenyl)Iodonium Salts with Sodium Selenide, Sodium Sulfide, Sodium Azide and Potassium Thiocyanate
作者:Jie Yan、Hongwei Jin、Zhenchu Chen
DOI:10.3184/030823407x209697
日期:2007.4
The reactions of vinyl(phenyl)iodonium salts with sodium selenide, sodium sulfide, sodium azide and potassium thiocyanate have been studied. Divinylic selenides, divinylic sulfides, vinylic azides and vinylic thiocyanates were synthesised stereoselectively in good yields.