Tetrahedron Letters p. 151 - 154 (1995)
Update date:2022-07-30
Topics:
Church, Nicola J.
Young, Douglas W.
Excellent regiospecificity has been achieved in the reaction of carbon nucleophiles with N-para-toluenesulfonylaziridine-2-carboxylic acid (6, R=H) protected as the anion.This has been developed into a general and high yielding synthesis of optically pure α-amino acids containing one chiral centre.When the aziridine (20) containing a second chiral centre was used, only lithium trimethylsilylacetylide gave the desired α-amino acid.Reaction with higher order cuprates gave lower yields, the principal products being the protected β-amino acids (22) and (23).
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(1996)