S. Jost et al., TOTALLY STEREOCONTROLLED NITRONE-KETENE ACETAL BASED SYNTHESIS OF (2S,3S)-N-BENZOYL-PHENYLISOSERINE AND N-BOC-PHENYLISOSERINE, Journal of organic chemistry, 62(19), 1997, pp. 6672-6677
A novel, nitrone-ketene acetal based approach to enantiopure (2S,3S)-N
-benzoyl- and N-boc-phenylisoserine has been realized. The convergent
approach, which involves the intermediacy of isoxazolidinones, proceed
s in up to 59% overall yield and requires only three operations from t
he starting nitrones.