Jn. Denis et al., TAXOTERE(R) BY ESTERIFICATION WITH STEREOCHEMICALLY WRONG (2S,3S)-PHENYLISOSERINE DERIVATIVES, Tetrahedron letters, 35(1), 1994, pp. 105-108
Cyclically protected anti (2S, 3S) phenylisoserines on esterification
with baccatin III derivatives afford Taxotere(R) and taxol precursors
with the syn (2'R, 3'S) side chain.