A Novel Use of Grubbs' Carbene. Application to the Catalytic Deprotection of Tertiary Allylamines
作者:Benito Alcaide、Pedro Almendros、Jose M. Alonso、Moustafa F. Aly
DOI:10.1021/ol0167412
日期:2001.11.1
[reaction--see text] The first examples accounting for the catalytic deprotection of allylicamines by using reagents different from palladium catalysts have been achieved via Grubbs' carbene-mediated reaction. The current mechanistic hypothesis invokes a nitrogen-assisted ruthenium-catalyzed isomerization, followed by hydrolysis of the enamine intermediate. We believe that an unprecedented mode of ring
discovered. The first examples of the catalytic deprotection of allylicamines with reagents other than palladium catalysts have been achieved through Grubbs carbene mediated reaction. Significantly, the catalytic system directs the reaction toward the selective deprotection of allylicamines (secondary as well as tertiary) in the presence of allylic ethers. A variety of substrates, including enantiomerically