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. 2016 Mar 7;55(11):3580-5.
doi: 10.1002/anie.201510675. Epub 2016 Feb 5.

Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere

Benjamin A Chalmers  1 , Hui Xing  1 , Sevan Houston  1 , Charlotte Clark  2 , Sussan Ghassabian  3 , Andy Kuo  3 , Benjamin Cao  4   5 , Andrea Reitsma  4   5 , Cody-Ellen P Murray  6 , Jeanette E Stok  1 , Glen M Boyle  7 , Carly J Pierce  7 , Stuart W Littler  4 , David A Winkler  4   8 , Paul V Bernhardt  1 , Cielo Pasay  7 , James J De Voss  1 , James McCarthy  7   9 , Peter G Parsons  7 , Gimme H Walter  6 , Maree T Smith  3 , Helen M Cooper  2 , Susan K Nilsson  4   5 , John Tsanaktsidis  10 , G Paul Savage  11 , Craig M Williams  12
Affiliations

Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere

Benjamin A Chalmers et al. Angew Chem Int Ed Engl. .

Erratum in

  • Corrigendum: Validating Eaton's Hypothesis: Cubane as a Benzene Bioisostere.
    Chalmers BA, Xing H, Houston S, Clark C, Ghassabian S, Kuo A, Cao B, Reitsma A, Murray CP, Stok JE, Boyle GM, Pierce CJ, Littler SW, Winkler DA, Bernhardt PV, Pasay C, De Voss JJ, McCarthy J, Parsons PG, Walter GH, Smith MT, Cooper HM, Nilsson SK, Tsanaktsidis J, Savage GP, Williams CM. Chalmers BA, et al. Angew Chem Int Ed Engl. 2018 Jul 9;57(28):8359. doi: 10.1002/anie.201711161. Angew Chem Int Ed Engl. 2018. PMID: 29975016 No abstract available.

Abstract

Pharmaceutical and agrochemical discovery programs are under considerable pressure to meet increasing global demand and thus require constant innovation. Classical hydrocarbon scaffolds have long assisted in bringing new molecules to the market place, but an obvious omission is that of the Platonic solid cubane. Eaton, however, suggested that this molecule has the potential to act as a benzene bioisostere. Herein, we report the validation of Eaton's hypothesis with cubane derivatives of five molecules that are used clinically or as agrochemicals. Two cubane analogues showed increased bioactivity compared to their benzene counterparts whereas two further analogues displayed equal bioactivity, and the fifth one demonstrated only partial efficacy. Ramifications from this study are best realized by reflecting on the number of bioactive molecules that contain a benzene ring. Substitution with the cubane scaffold where possible could revitalize these systems, and thus expedite much needed lead candidate identification.

Keywords: agrochemicals; bioisosteres; cubane; pharmaceuticals; structure-activity relationships.

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