Fluorinated retinoic acids and their analogs. 3. Synthesis and biological activity of aromatic 6-fluoro analogs
作者:Allen J. Lovey、Beverly A. Pawson
DOI:10.1021/jm00343a014
日期:1982.1
Several analogues (15a--e) of methyl (E,E,Z,E)-3,7-dimethyl-6-fluoro-9-(4-methoxy-2,3,6-trimethylphenyl)nonatetraenoate (15f), which had been found to cause a marked regression of chemically induced skin papillomas in mice, were prepared. Two synthetically versatile methods leading to these derivatives are described. The key intermediate, ethyl (Z)-2-fluoro-3-methyl-4,4-dimethoxy-2-butenoate (8), was
(E,E,Z,E)-3,7-二甲基-6-氟-9-(4-甲氧基-2,3,6-三甲基苯基)壬酸酯(15f)的几种类似物(15a-e),制备了已发现可引起小鼠化学诱导的皮肤乳头状瘤明显退缩的药物。描述了导致这些衍生物的两种合成通用方法。将关键中间体(Z)-2-氟-3-甲基-4,4-二甲氧基-2-丁烯酸酯(8)精制为C10醛酯,甲基(2E,4E,6Z)-3-甲基-6-氟-7-甲酰基-2,4,6-辛三烯酸酯(14a),经Wittig与芳基phosph盐13a-e缩合后得到(2E,4E,6Z,8E)-3,7-二甲基-6-氟-9-芳基-2,4,6,8-壬酸酯15a-e。或者,将8与[(4-甲氧基-2,3,6-三甲基苯基)甲基]三苯基氯化chloride(13f)的Wittig反应得到(E / Z,E)-2-氟-3-甲基-5-的混合物(2,3,6-三甲基-4-甲氧基苯基)-2,4-戊二烯酸酯17和18,将