Acta Cryst. (2003). E59, o1987-o1989  [ doi:10.1107/S1600536803026412 ]

1-tert-Butyl 2-methyl 4-(R)-hydroxypyrrolidine-1,2-(2S)-dicarboxylate

W. Clegg, H. J. C. Deboves and M. R. J. Elsegood

Abstract: The title compound, C₁₁H₁₉NO₅, is a protected derivative of trans-4-hydroxy-L-proline. The pyrrolidine ring has a twisted conformation. The N atom has planar coordination and is conjugated with the attached ester group. The methyl ester substituent is pseudo-equatorial, while the hydroxy group is pseudo-axial and acts as a hydrogen-bond donor to a carbonyl O atom in an adjacent molecule, forming molecular chains.

Online 22 November 2003

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