Crystallization-induced dynamic resolution (CIDR) and its application to the synthesis of unnatural N-substituted amino acids derived from aroylacrylic acids
A highly stereoselective conjugate addition of chiral amino alcohols affords a simple and inexpensive access to a wide variety of N-functionalized homophenylalanine derivatives. Limitations and conditions for application of CIDR to this system were studied.
Absolute structure determination of (2R,1′S)-2-(1′-benzyl-2′-hydroxyethylamino)-4-phenylbutanoic acid
作者:D. Berkeš、A. Kolarovič、R.G. Raptis、P. Baran
DOI:10.1016/j.molstruc.2004.04.001
日期:2004.7
prepare a labile γ-oxo-α-aminoacid ( 3 ) with a new stereogenic center in high diastereomeric and enantiomeric purity. Compound 3 was reduced to a stable compound, (2 R ,1′ S )-2-(1′-benzyl-2′-hydroxyethylamino)-4-phenylbutanoic acid ( 4 ), which crystallizes in space group P2 1 . Upon deprotonation, 4 becomes a tridentate monoanionic chelating ligand, 4 −H , which reacts with copper nitrate yielding [Cu(