N,N-Diethylfluoromethyltamoxifen: Synthesis, assignment of 1H and 13C spectra and receptor assay
作者:DJ Yang、A Cherif、W Tansey、LR Kuang、C Li、KC Wright、EE Kim、S Wallace
DOI:10.1016/0223-5234(92)90023-t
日期:1992.12
(cis) and (trans)N,N-diethylfluoromethyltamoxifen (1-14-(2-diethylaminoethoxy)phenyl]-1,2-diphenyl-5-fluoro-1-pentene) were synthesized from clomiphene in a three-step procedure and both isomers were differentiated by the concerted application of two-dimensional NMR techniques. In in vitro estrogen receptor assay from pig uterus using [H-3]-estradiol (5 nM), the IC50 values were: NN-diethylfluorotamoxifen cis 5 muM, trans 1 muM; tamoxifen 30 muM. In human MCF7 cell growth assay, the IC50 values were cis 4.5 muM, trans 11.8 muM, tamoxifen 11.0 muM. The data suggest that the fluoro analog of tamoxifen has potential for imaging estrogen receptors by positron emission tomography (PET) and may be used to predict the efficacy of breast tumor therapy.