Efficient Control of π-Alkyne and Vinylidene Complex Pathways for the W(CO)<sub>5</sub>(L)-Catalyzed Synthesis of Two Types of Nitrogen-Containing Bicyclic Compounds
作者:Yuji Onizawa、Hiroyuki Kusama、Nobuharu Iwasawa
DOI:10.1021/ja0782605
日期:2008.1.1
2-azabicyclo[3.3.0]octanes were obtained in good yield via pi-alkyne complexes. On the other hand, treatment of the same substrates with a catalytic amount of W(CO)6 in the presence of n-Bu3N under the same reaction conditions gave 3-azabicyclo[3.3.0]octanes in good yield exclusively via vinylidenecomplexes. Thus, the pi-alkyne and vinylidenecomplex pathways are easily controlled by using a catalytic amount