A Method for Cleaving an Allyl Protecting Group at the Amide Nitrogen of Peptides by One-Pot Olefin Isomerization−Oxidation
作者:Kouki Kajihara、Mitsuhiro Arisawa、Satoshi Shuto
DOI:10.1021/jo801915c
日期:2008.12.5
A facile method for N-deallylation at the amide nitrogen of peptides is described. One-pot deallylation of a substrate through ruthenium hydride-catalyzed terminal olefin isomerization and subsequent ozonolysis gave the corresponding deallylated product under mild conditions.
A versatile strategy for the α-substitution of enones through the formal fusion between enones and unactivated alkenes is described. It relies on the formation and use of α-xanthyl-β-hydroxy ketones, which can be considered as synthetic equivalents of the high energy and difficult to tame alkenyl radicals. The process, which can often be accomplished one-pot, could be extended in one case to an α,β-unsaturated
作者:Hui Qiao、Jean Michalland、Qi Huang、Samir Z. Zard
DOI:10.1002/chem.202302235
日期:2023.10.18
Exploiting the reactivity of the novel acetyl (MiDA)boronate radical allows access to a broad range of acyl (MIDA)boronates, which in suitable cases can be converted into B(MIDA) substituted furans and pyrroles.