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2005
Amino acids
U 0400
3-Benzoyl-2-isopropyl-4-alkyloxazolidin-5-ones as Efficient and Inexpensive
of Enantiopure α,α-Dialkyl α-Amino Acids and α,β-Dialkyl α,β-Diami21- 197 Sources
nopropionic Acids. — Oxazolidines such as (IV) derived from (S)-amino acids (I) and
inexpensive isobutyraldehyde (II) are used for the synthesis of methyl esters (IX). The
protocol is as efficient as the corresponding procedure using pivaldehyde as the starting
material but more economical. — (ROJAS-LIMA*, S.; TELLEZ-ZENTENO, O.;
LOPEZ-RUIZ, H.; LOUBET-GONZALEZ, L.; ALVAREZ-HERNANDEZ, A.;
Heterocycles 65 (2005) 1, 59-75; Cent. Invest. Quim., Univ. Auton. Estado Hidalgo,
42001 Pachuca Hidalgo, Mex.; Eng.) — Mais
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