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

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A new class of long-acting hormonal steroid preparation: synthesis of dimeric androgenes coupled at C3-C3 and C17-C3 and of an androgen-progestogen combination.

3beta-Hydroxy-4-androsten-17-one was prepared from 4-androsten-3,17-dione according to the method of Klimstra and Colton (1) and dimerized by means of esterification with succinic acid. The reduction with lithium-tri-t-butoxyaluminium hydride gave a testosterone derivative coupled between C3-C3 which showed after a single injection of 10 mg a protracted but relatively weak androgenic effect in castrated male rats. The direct esterification of testosterone hemisuccinate with 4-androsten-3beta, 17beta-diol gave the testosterone derivative coupled between C17-C3 which showed a more even and more protracted time response curve than testosterone enanthate. The testosterone-ethynodiol succinate also coupled between C17-C3, showed an androgenic depot-effect similar to that of the dimeric C17-C3 testosterone derivative.[1]

References

  1. A new class of long-acting hormonal steroid preparation: synthesis of dimeric androgenes coupled at C3-C3 and C17-C3 and of an androgen-progestogen combination. Kuhl, H., Taubert, H.D. Steroids (1976) [Pubmed]
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