AMINATION OF ARYLACETYLENIC AND VINYLACETYLENIC COMPOUNDS CATALYZED BY RHODIUM(I) COMPLEXES

New rhodium-catalyzed amination reactions of arylacetylenes and cycloh exen-1-ylacetylene in the presence of strong bases with the use of car bon dioxide as an auxiliary are described. Secondary amines attack the terminal carbon atom of the triple bond followed by protonation of th e adjacent carbon atom. Alternatively, the reaction can proceed furthe r with the addition of the second alkyne molecule. The conditions for the selective synthesis of enamines (up to 87% yield) or alpha-substit uted propynylamines (up to 86% yield) are reported.