Alkynyl sulfides and selenides from alkynyl bromides and diorganoyl chalcogenides promoted by copper(I) iodide
作者:Antonio L. Braga、Aurélia Reckziegel、Paulo H. Menezes、Hélio A. Stefani
DOI:10.1016/0040-4039(93)85084-a
日期:1993.1
Alkynyl sulfides and selenides were obtained in good yields by reacting alkynyl bromides with diorganoyl disulfides and diselenides in hexamethylphosphoric triamide (HMPA) in the presence of copper (I) iodide.
Ligand-free, catalytic and regioselective hydroboration of selenoalkynes
作者:Lucas L. Baldassari、Kelvin S. Santos、Camila P. Ebersol、Diogo S. Lüdtke、Angélica V. Moro
DOI:10.1039/d0cy01379j
日期:——
The copper-catalyzed hydroboration of selenoalkynes in a regio- and stereoselective fashion is reported, delivering selenium-containing vinylboronate products in good yields. The reported protocol fills an important gap in the literature with respect to the synthesis of a valuable class of compounds, which is difficult to obtain otherwise.
(Z)-1-alkenyl selenides in high yields. Alternatively, (E)-1-alkenyl selenides were prepared by the reaction of 1-alkenylaluminums with organic diselenides in a one-potprocedure starting from the corresponding 1-alkynes, which provides a versatile tool for the preparation of stereo-defined unsaturated organic derivatives of selenium. The Cp2ZrCl2-catalyzed methylalumination and сycloalumination of 1-alkynyl