Synthesis and growth inhibition activity of fluorinated derivatives of tamoxifen
摘要:
The design and synthesis of 11 fluorinated derivatives of tamoxifen are described. Growth inhibition values (GI(50)) on human HT-29, M21, MCF7, and MDA-MB-231 tumor cells are also reported. In general, the GI(50) values are similar or slightly higher than tamoxifen with the most active compound on MCF7 cell line having a GI(50) = 3.6 mu M. Surprisingly, as opposed to tamoxifen, both geometrical isomers behave similarly. We hypothesize that this behavior is due to in vitro isomerization of the compounds. (C) 2013 Elsevier Ltd. All rights reserved.
Chemistry of organo halogenic molecules. Part XCIV. The effect of fluorine on photochemical carbon-halogen bond cleavage in Z and E-1-fluoro-2-Halo-1,2-diphenylethylenes.
作者:A. Gregorčič、M. Zupan
DOI:10.1016/s0022-1139(00)81541-9
日期:1988.11
Introduction of fluorine on the olefinic carbon atom in the β-position to a carbon-halogenbond increased the photocleavage compared to the unsubstituted substrate, and reduced the electron transfer from the caged radical-pair to cationic intermediates. Increased solvent polarity resulted in enhanced photocleavage of the carbon-halogenbond.
An addition/elimination reaction of organolithium reagents to silylated beta,beta-difluorostyrene derivatives followed by a bromination/desilicobromination reaction provides a simple and effective synthetic approach to a wide range of bromofluoroalkenes (up to >97/3). In addition, the bromofluoroalkenes can be used in Pd-catalyzed transformations giving access to both tri- and tetrasubstituted fluoroalkenes.
GREGORCIC A.; ZUPAN M., VESTN. SLOVEN. KEM. DRUS., 33,(1986) N 3, 325-338