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
Chemoselective Deprotection of Allylic Amines Catalyzed by Grubbs’ Carbene
作者:Benito Alcaide、Pedro Almendros、José Alonso、Amparo Luna
DOI:10.1055/s-2004-831211
日期:——
A commercially available ruthenium complex (first generation Grubbs’ carbene) was used for the catalytic deprotection of allylic amines (secondary as well as tertiary), by using for the first time reagents different from palladium catalysts. Interestingly, the catalytic system directs the reaction toward the selective deprotection of allylamines in the presence of allylic ethers.