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Antiestrogens. Synthesis and evaluation of mammary tumor inhibiting activity of 1,1,2,2-tetraalkyl-1,2 -diphenylethanes

Hartmann, Rolf W. ; Kranzfelder, Gerhard ; Angerer, Erwin von ; Schönenberger, Helmut



Abstract

Among the newly synthesized 1,1,2,2-tetraalkyl-1,2-diphenylethanes, 1,1,2,2-tetramethyl-1,2-bis(4'-hydroxyphenyl)ethane (23) and 1,1,2,2-tetramethyl-1,2-bis(3'-hydroxyphenyl)ethane (26) were the most active compounds regarding estradiol receptor affinity, exhibiting Ka values of 0.73 X 10(8) and 0.67 X 10(8) M-1, respectively. In vivo, 23 and 26 showed only very small uterotrophic activity in the ...

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