N-butyl, N-methyl, 11-[3′,17′ β-(dihydroxy)-1′,3′,5′(10′)- estratrien-16′ α-yl]-9(R/S)-bromo undecanamide: synthesis and 17β-HSD inhibiting, estrogenic and antiestrogenic activities
摘要:
The synthesis of a 16 alpha-(bromoalkylamide) derivative of estradiol (N-butyl, N-methyl, 11-[3',17'beta-(dihydroxy)-1',3',5'(10')-estratrien-16'alpha-yl]-9(R/S)-bromo undecanamide) was performed by two different approaches starting from estrone. Each approach hers the same key intermediate, containing an aldehyde group, but differs by the bromination step and the timing of formation of the amide group. This compound was found to cause, at 100 mu M, a complete inhibition of 17 beta-hydroxysteroid dehydrogenase (17 beta-HSD) responsible for the interconversion of estrone and estradiol. The corresponding IC50 value was 10.6 mu M. In the estrogen-sensitive ZR-75-1 human breast cancer cell line, this estradiol derivative has no estrogenic activity at 30 nM and only a minimal estrogenic activity (10% above the basal level) at 1 mu M. At this latter concentration, this compound causes a 28% inhibition of 0.1 nM EI-induced cel[proliferation (antiestrogenic activity). Thus, the introduction of a side-chain with a secondary bromide and a butyl methyl amide group at the 16 alpha-position of estradiol has two interesting effects; namely an inhibition of cytosolic 17 beta-HSD and a blockade of the estrogenic effect of estradiol.
Estradiol dimers as a new class of steroid sulfatase reversible inhibitors
作者:Diane Fournier、Donald Poirier
DOI:10.1016/j.bmcl.2008.12.047
日期:2009.2
A series of estradiol dimers was synthesized or selected from compounds available in our laboratory and tested for inhibition against steroid sulfatase. Dimers linked by their C17 position, compounds 7 and 8, showed inhibitory potency similar (56% and 54% at 1 mu M) to that of our best previously reported reversible inhibitor EM-690 (62% at 1 mu M). Docking experiment seems to indicate that C17-C17 dimers bind in a similar way to EM-690 whereas C16-O3 and C16-C16 dimers bind in an upside-down position. (c) 2008 Elsevier Ltd. All rights reserved.