Abstract
The crystal and molecular structure of procyclidine (α-cyclohexyhl-α-phenyl-1-pyrrolidinepropanol) has been determined in order to investigate structural bases for its biological activity as an aniticonvulsant drug. Crystals of procyclidine hydrochloride are monoclinic, space group P21/c, with cell dimensions a = 5.891 ± 0.006, b = 28.603 ± 0.018, c = 11.314 ± 0.004 A, β = 106.0 degrees ± 15', Z = 4 molecules/cell. The structure was determined by the symbolic addition procedure, utilizing data collected on an automated diffractometer (CuKα radiation). Refinement was accomplished by an anisotropic full-matrix least-squares procedure, resulting in a final R value of 0.081.
Stereochemical features which the molecule has in common with other anticonvulsants, diphenylhydantoin and diazepam, and which may account for its anticonvulsant activity are analyzed and discussed.
ACKNOWLEDGMENTS The authors thank Dr. H. Kalant for supplying the procyclidine hydrochloride.
- Copyright ©, 1971, by Academic Press, Inc.
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