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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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A structure-activity relationship study of spirolactones. Contribution of the cyclopropane ring to antimineralocorticoid activity.

A series of spirolactones containing a cyclopropane ring in the molecule was examined for its effects on the mineralocorticoid receptor. The results were compared with those of a similar series of spirolactones in which the cyclopropane ring was replaced by a double bond. Insertion of a double bond or an alpha-cyclopropane ring into the 1,2 or the 6,7 position leads to a reduction in the binding affinity. The pi-bonding system of the beta-cyclopropane ring at C-6 and C-7 does not promote binding to the receptor. The presence of the 6 beta, 7 beta-cyclopropane ring may deter metabolic activation to account for the enhanced in vivo activity.[1]

References

  1. A structure-activity relationship study of spirolactones. Contribution of the cyclopropane ring to antimineralocorticoid activity. Chinn, L.J., Salamon, K.W., Desai, B.N. J. Med. Chem. (1981) [Pubmed]
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