(±)-tert-Butyl 3-Hydroxy-4-phenyl-2-(p-toluenesulfonylamino)pentanoate–Dichloromethane (1/1): a Pseudo Centre of Symmetry in an Enantiomeric Pair

The title compound, C₂₂H₂₉NO₅S.CH₂Cl₂, was investigated in order to study the stereochemistry of the β-hydroxy-α-amino acid derivatives formed by the aldol reaction of an ester enolate with an aldehyde. The racemate crystallizes with two independent formula units in the non-centrosymmetric space group Pn as hydrogen-bonded dimers in which the two enantiomers are related by a pseudo centre of symmetry.

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