[W(CO)5]-Catalyzedendo- orexo-Cycloisomerization Reactions of 1,1-Disubstituted 4-Pentyn-1-ols: Experimental and Theoretical Studies
作者:José Barluenga、Alejandro Diéguez、Félix Rodríguez、Francisco J. Fañanás、Tomás Sordo、Pablo Campomanes
DOI:10.1002/chem.200500537
日期:2005.9.19
The [W(CO)5]-catalyzed cycloisomerization reaction of 1,1-disubstituted 4-pentyn-1-ol derivatives has been studied from both, an experimental and theoretical point of view. Three different catalytic systems have been evaluated preformed [(thf)W(CO)5], [W(CO)6]/excess Et3N, and [W(CO)6]/2 mol % Et3N]. We have found that the reaction proceeds to give the formal endo- or exo-cycloisomerization products