title: [Synthesis of receptor reagent--estradiol-polyethyleneglycol-fluorescein isothiocyanate].
abstract: Estradiol conjugate has been used as a tracer to detect estrogen receptor of human mammary cancer cells. In order to look for more stable carrier of fluorescent estradiol conjugate, we substituted polyethyleneglycol (PEG) for bovine serum albumin (BSA) and synthsized 17 beta-estradiol-6-carboxymethyl-oxime-PEG-fluorescein isothiocyanate. The structure of the title compound was confirmed by IR and UV. In this paper, we also describe another procedure to convert the terminal hydroxyl groups of PEG to the more reactive primary amino PEG by tosylation, azide group substitution and catalytic hydrogenation. The ratio of conversion is about 87%.
authors.affiliation: School of Pharmacy, West China University of Medical Sciences, Chengdu.
authors.forename: H
authors.initials: H
authors.lastname: Zheng
authors.forename: X H
authors.initials: XH
authors.lastname: Tong
authors.forename: F
authors.initials: F
authors.lastname: Mao
authors.forename: L L
authors.initials: LL
authors.lastname: Weng
mesh_terms: D004958:Estradiol / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D016650:Fluorescein-5-isothiocyanate / Q000138:chemical synthesis*; D017879:Isothiocyanates; D011092:Polyethylene Glycols / Q000138:chemical synthesis*; D011960:Receptors, Estrogen / Q000032:analysis; D013861:Thiocyanates
chemical_list: D017879:Isothiocyanates; D011960:Receptors, Estrogen; D013861:Thiocyanates; C037152:isothiocyanic acid; C002912:estradiol-6-(O-carboxymethyl)oxime; D011092:Polyethylene Glycols; D004958:Estradiol; D016650:Fluorescein-5-isothiocyanate