Starting with ( S)-leucine, the corresponding γ-fluoride 8 has been prepared in a stereocontrolled fashion, by exploiting -methods for the direct side-chain bromination of amino acid derivatives and silver(I) fluoride as the fluorinating reagent.
作者:Christopher J. Easton、Alison J. Edwards、Stephen B. McNabb、Martin C. Merrett、Jenny L. O'Connell、Gregory W. Simpson、Jamie S. Simpson、Anthony C. Willis
DOI:10.1039/b303719c
日期:——
A range of dehydro amino acid derivatives has been prepared and subjected to halogenation using either molecular bromine or chlorine, or NBS. Allylichalogenation of the unsaturated amino acid side chains occurs through radical bromination with NBS. The procedure is complementary to treatment with chlorine, which also affords allyl halides. This latter and unusual reaction is shown through a deuterium