Modification of the tamoxifen skeleton by a ferrocenyl unit, combined with
lengthening of the basic -O(CH2)(n)N(CH3)(2) chain from n = 2 to n = 3, gen
erates a new type of antioestrogen with unique properties. This molecule, 5
, easily accessible via a McMurry coupling reaction, is indeed effective ag
ainst the proliferation of breast cancer cells via both the alpha oestradio
l receptor and its newly discovered beta form. (C) 2000 Academie des scienc
es / Editions scientifiques et medicales Elsevier SAS.