Palladium(O) catalysed and copper(I) promoted reactions of the secondary zinc reagent derived from L-threonine
The preparation of C-3 epimeric secondary zinc reagents from diastereoisomeric iodide using DMF as solvent was discussed and analyzed by NMR methods. Palladium catalysed cross couplings and copper promoted allylations produced protected β-methyl substituted amino acids. It was concluded that the threonine derived zinc reagents were of limited values, but further optimization of copper-promoted reactions make this approach to synthesis of β-methyl substituted α-amino acids more useful.
Wilson, Ian,Jackson, Richard F.W.
p. 2845 - 2850
(2007/10/03)
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