Iridium Complex-Catalyzed Reaction of 1,6-Enynes: Cycloaddition and Cycloisomerization
作者:Satoko Kezuka、Toshiaki Okado、Eri Niou、Ryo Takeuchi
DOI:10.1021/ol050085e
日期:2005.4.1
1,6-Enynes reacted with monoynes to give cyclohexadiene derivatives in the presence of a catalytic amount of (Ir(cod)CI](2)/ligand. DPPE was most suitable for cycloaddition. Diastereoselective cycloaddition was also possible. In the absence of monoynes, 1,6-enynes cycloisomerized to (2)-1-alkylidene-2-methylenecyclopentane derivatives. DPPF was most suitable for cyclolsomerization. These results are the first examples of highly Z-selective cycloisomerization.