N-terminal α-amino group modification of peptides by an oxime formation–exchange reaction sequence
作者:Karen Ka-Yan Kung、Kong-Fan Wong、King-Chi Leung、Man-Kin Wong
DOI:10.1039/c3cc42261e
日期:——
A site-specific and efficient method for N-terminal modification of peptides using oxone for selective oxidation of N-terminal α-amino groups of peptides to oximes followed by transoximation with O-substituted hydroxylamines has been developed.
A catalytic, aerobicoxidative dearomatization protocol has been developed for the preparation of spiroisoxazline scaffolds from oximes using TEMPO and NaNO2 as the catalyst and O2 as the sole oxidant. This dearomatization methodology features its mild reaction conditions, good functional group tolerance, and an unprecedented broad substrate scope, encompassing phenols, aryl ethers, thiophenols, aryl
Intramolecular cyclisation of phenolic oximes. Part II. Cyclisations with brominating agents
作者:Alexander R. Forrester、Ronald H. Thomson、Soo-On Woo
DOI:10.1039/p19750002348
日期:——
Intramolecularcyclisation of p-hydroxyarylpropan-2-one oximes to 2,5-dienonespiroisoxazolines can be achieved by using bromine, N-bromosuccinimide, or tetrabromocyclohexa-2,5-dienone. With an analogous ortho-phenolic oxime only the last of these was effective, the structure of the 2,4-dienonespiroisoxazoline formed being confirmed by an independent synthesis.