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Kaas K, Sorensen H. The crystal structure of 3-hydroxy-3-isobutyl-2-pyrrolidone-5-carboxylic acid, lactam of 4-hydroxy-4-isobutylglutamic acid from Reseda odorata L. Acta Chem Scand A. 1977;31(5):364-8doi: 10.3891/acta.chem.scand.31a-0364.
Kaas, K., & Sorensen, H. (1977). The crystal structure of 3-hydroxy-3-isobutyl-2-pyrrolidone-5-carboxylic acid, lactam of 4-hydroxy-4-isobutylglutamic acid from Reseda odorata L. Acta chemica Scandinavica. Series A: Physical and inorganic chemistry, 31(5), 364-8. https://doi.org/10.3891/acta.chem.scand.31a-0364
Kaas, K, and Sorensen, H. "The crystal structure of 3-hydroxy-3-isobutyl-2-pyrrolidone-5-carboxylic acid, lactam of 4-hydroxy-4-isobutylglutamic acid from Reseda odorata L." Acta chemica Scandinavica. Series A: Physical and inorganic chemistry vol. 31,5 (1977): 364-8. doi: https://doi.org/10.3891/acta.chem.scand.31a-0364
Kaas K, Sorensen H. The crystal structure of 3-hydroxy-3-isobutyl-2-pyrrolidone-5-carboxylic acid, lactam of 4-hydroxy-4-isobutylglutamic acid from Reseda odorata L. Acta Chem Scand A. 1977;31(5):364-8. doi: 10.3891/acta.chem.scand.31a-0364. PMID: 883458.
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Acta Chem Scand A. 1977;31(5):364-8. doi: 10.3891/acta.chem.scand.31a-0364.

The crystal structure of 3-hydroxy-3-isobutyl-2-pyrrolidone-5-carboxylic acid, lactam of 4-hydroxy-4-isobutylglutamic acid from Reseda odorata L.

Acta chemica Scandinavica. Series A: Physical and inorganic chemistry

K Kaas, H Sorensen

PMID: 883458 DOI: 10.3891/acta.chem.scand.31a-0364

Abstract

The relative configuration of 3-hydroxy-3-isobutyl-2-pyrrolidone-5-carboxylic acid has been determined by an X-ray crystal structure analysis. The compound crystallized in space group P212121 with two molecules in the asymmetric unit. a=16.023(3) A, b=19.349(7) A, c=6.9053(16) A. The structure was solved by direct methods using MULTAN and refined by full-matrix least-squares technique to an R of 0.137 for 645 diffractometer-collected intensities. The absolute configurations of the title compounds were deduced; the configuration of the amino acid and the lactam are 2(S), 4(S) and 3(S), 5(S), respectively.

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