Copper-catalyzed synthesis of β-haloalkenyl chalcogenides by addition of dichalcogenides to internal alkynes and its application to synthesis of (Z)-tamoxifen
作者:Nobukazu Taniguchi
DOI:10.1016/j.tet.2009.01.094
日期:2009.4
A copper-catalyzed synthesis of β-haloalkenyl sulfides or selenides was carried out by addition of dichalcogenides and tetrabutylammonium halides to internal alkynes. The present reaction anti- and regio-selectively afforded the corresponding alkenyl chalocogenides, and took advantage of both organochalcogenide-groups on dichalcogenide. Furthermore, the reaction under oxygen atmosphere could employ
AMINE-CATALYZED 1,2-HALOSELENENYLATION OF ALKYNES WITH PHENYL SELENOCYANATE IN THE PRESENCE OF CUPRIC HALIDE
作者:Shuji Tomoda、Yoshito Takeuchi、Yujiro Nomura
DOI:10.1246/cl.1981.1715
日期:1981.12.5
The reaction of phenylselenocyanate with six common alkynes in the presence of cupric halide(halogen=Cl or Br) and triethylamine provided halogen-substituted vinyl selenides, 1,2-haloselenenylation products, in 66–96% yields.