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PubMed1990

Cytotoxic ester derivatives of the mammary tumor inhibiting antiestrogen 2,3-bis(2-fluoro-4-hydroxyphenyl)-2,3-dimethylbutane.

The synthesis of the bis-acrylate 12, the bis-beta-chloropropionate 13 and the bis-beta-bromopropionate 14 of the "partial" antiestrogen 2,3-bis(2-fluoro-4-hydroxyphenyl)-2,3-dimethylbutane (7) is described. In the case of 13 and 14 the introduction of the beta-haloester-functions moderately reduces the estrogen receptor affinity of 7. However, it was quite strongly diminished in 12. The hydrolytic stability under in vitro-receptor-assay conditions decreases in the order 12 greater than 14 greater than 13. Compared with 7 the estrogenic potency of 12-14 is increased to a great extent. The title compounds cause a strong inhibition of the hormone-dependent MXT-M3.2 mouse mammary tumor.

Animals↗