selectivity is achieved in the cleavage of benzylethers using ball-shaped palladium nanocatalysts, Pd@MCM-48, in an MCM-48 matrix. The unique nanocatalysts not only feature unprecedented complete hydrogenolysis selectivity of a benzylether over hydrogenation of a double bond, but also demonstrate selective cleavage of unsubstituted benzylether over substituted benzylethers.
Reductive amine deallyl- and debenzylation with alkali metal in Silica Gel (M-SG)
作者:Partha Nandi、James L. Dye、James E. Jackson
DOI:10.1016/j.tetlet.2009.04.058
日期:2009.7
Alkali metals in silica gel (the M-SG materials) are effective reagents for reductive deallylation, debenzylation, debenzhydrylation, and detritylation of amines. As such, these reagents provide a convenient alternative to traditional metal ammonia solutions for this class of deprotections.