Deprotection of allylic esters, carbonates and carbamates catalyzed by
申请人:Schering Corporation
公开号:US04314942A1
公开(公告)日:1982-02-09
An improved synthetic process for the removal of an allyl group in an allylic ester or an allyloxycarbonyl group in an allylic carbonate or carbamate by reaction with 2-ethylhexanoic acid or an alkali metal salt thereof and a catalytic amount of an organic-soluble palladium complex is disclosed herein.
Jean Pierre Genet, Errol Blart, Monique Savignac, Stephane Lemeune, Sandr+, Tetrahedron, 50 (1994) N 2, S 497-503
作者:Jean Pierre Genet, Errol Blart, Monique Savignac, Stephane Lemeune, Sandr+
DOI:——
日期:——
A Mild Ligand-Free Iron-Catalyzed Liberation of Alcohols from Allylcarbonates
作者:André P. Dieskau、Bernd Plietker
DOI:10.1021/ol202270g
日期:2011.10.21
from most carbonates the allyloxy carbonyl protecting groupcan be cleavedunderneutralconditions using metal catalysis. However, most of the catalysts employed to date are based upon precious metals. Herein we present two protocols for the mild Fe-catalyzed liberation of alcohols from allylcarbonates that are characterized by broad functional group tolerance and exclusive chemoselectivity.
Practical palladium-mediated deprotective method of Allyloxycarbonyl in aqueous media
作者:Jean Pierre Geneˆt、Errol Blart、Monique Savignac、Stéphane Lemeune、Sandrine Lemaire-Audoire、Jean-Marc Paris、Jean-Marie Bernard
DOI:10.1016/s0040-4020(01)80771-7
日期:1994.1
esters, carbamates and carbonates by aqueous Pd (O) catalysed allyl transfer to diethylamine in aqueous media employing a water soluble phosphine. The allyl scavenger as well as by product allyl diethylamine are volatile and easily removed in vacuo. In a two phase system an increased selectivity is seen. The method has been successfully used for deprotection of a wide range of secondary amines or base