Abstract
The asymmetric unit of the title compound, C21H36N2O7, consists of two independent half-molecules, the other halves being generated by twofold rotational axes. The two independent half-molecules are related by a pseudo-inversion center. In one, the pyrrolidine ring adopts a twist conformation whereas in the other it is in an envelope conformation. The crystal packing is stabilized by C—H⋯O hydrogen bonds.
Highlights
The asymmetric unit of the title compound, C21H36N2O7, consists of two independent half-molecules, the other halves being generated by twofold rotational axes
The two independent half-molecules are related by a pseudo-inversion center
The pyrrolidine ring adopts a twist conformation whereas in the other it is in an envelope conformation
Summary
Key indicators: single-crystal X-ray study; T = 93 K; mean (C–C) = 0.003 A; R factor = 0.030; wR factor = 0.073; data-to-parameter ratio = 9.8. The asymmetric unit of the title compound, C21H36N2O7, consists of two independent half-molecules, the other halves being generated by twofold rotational axes. The two independent half-molecules are related by a pseudo-inversion center. The pyrrolidine ring adopts a twist conformation whereas in the other it is in an envelope conformation. The crystal packing is stabilized by C—HÁ Á ÁO hydrogen bonds. Related literature For the use of proline derivatives in organocatalysis, see: Dalko & Moisan (2004). See: Wiegrebe et al (1974). Monoclinic, C2 a = 21.995 (5) Ab = 9.9534 (18) Ac = 10.531 (2) A = 100.631 (3) V = 2265.9 (8) A 3
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