화학공학소재연구정보센터
Journal of the American Chemical Society, Vol.132, No.23, 7896-7896, 2010
Cationic Rhodium(I) Complex-Catalyzed [3+2] and [2+1] Cycloadditions of Propargyl Esters with Electron-Deficient Alkynes and Alkenes
A cationic rhodium(I) complex, [Rh(cod)(2)]SbF6 catalyzes the [3 + 2] cycloaddition of propargyl esters with dialkyl acetylenedicarboxylates in good yields, presumably through carbonyl-stabilized cationic rhodium(I) alkenylcarbene intermediates. The same rhodium(I) complex also catalyzes the [2 + 1] cycloaddition (cyclopropanation) of propargyl esters with N,N-disubstituted acrylamides in good yields with perfect diastereoselectivity.