A novel application of the chiral reagent (s)-2-N-(N?benzylprolyl)-aminobenzaldehyde: Synthesis of optically pure ?-methylvaline and ?-methylglutamic acid
作者:Yu. N. Belokon'、S. M. Motsishkite、V. I. Tararov、V. I. Maleev
DOI:10.1007/bf00961232
日期:1991.7
The synthesis of alpha-methyl substituted amino acids using Ni(II) complexes of the Schiff base obtained from alanine and (S)-2-N-(N'-benzylpropyl)aminobenzaldehyde is described. This complex was alkylated with isopropyl bromide, gramine iodomethylate, and methyl acrylate (in a Michael reaction). From the resulting mixtures of products, diastereomerically pure complexes were obtained by crystallization or silica gel chromatography. Both (S)- and (R)-enantiomers of the optically active amino acids alpha-Me-Val and alpha-Me-Glu were obtained after decomposing the diastereomerically pure complexes.
BELOKON, YU. N.;MOTSISHKITE, S. M.;TARAROV, V. I.;MALEEV, B. I., IZV. AN CCCP. CEP. XIM.,(1991) N, S. 1536-1542
作者:BELOKON, YU. N.、MOTSISHKITE, S. M.、TARAROV, V. I.、MALEEV, B. I.