作者:TOSHIO NAMBARA、MASAKI TAKAHASHI、MITSUTERU NUMAZAWA
DOI:10.1248/cpb.22.1167
日期:——
In order to obtain much more specific antiserum required for radioimmunoassay of estradiol, the preparation of new promising haptens has been undertaken. First, the C-6 epimeric 6-hydroxyestradiol 3, 17-bis (tetrahydropyranyl) ethers (VIII, XI) were treated with succinic anhydride and pyridine in the usual manner, respectively. Subsequent removal of the protecting groups provided the desired 6-hydroxyestradiol 6-hemisuccinates (X, XIII). Secondly, 7α-hydroxyestradiol 7-hemisuccinate (XXIII) has been also synthesized from 6-dehydroestradiol (XIV) by way of the 6α, 7α-epoxide (XVIII) as a key intermediate. Reductive cleavage of the 6, 7-oxido ring with metal hydride yielded solely the 7α-hydroxyl compound (XIX). Transformation into the 7-hemisuccinate (XXI) followed by elimination of the protecting group afforded XXIII in a satisfactory yield.
为了获得雌二醇放射免疫测定所需的特异性更高的抗血清,已经开始制备新的有前途的半抗原。首先,将C-6差向异构6-羟基雌二醇3,17-双(四氢吡喃基)醚(VIII,XI)分别用琥珀酸酐和吡啶按常规方式处理。随后除去保护基团,得到所需的6-羟基雌二醇6-半琥珀酸酯(X,XIII)。其次,还以6α,7α-环氧化物(XVIII)为关键中间体,以6-脱氢雌二醇(XIV)为原料合成了7α-羟基雌二醇7-半琥珀酸酯(XXIII)。用金属氢化物还原裂解6, 7-氧化环仅产生7α-羟基化合物(XIX)。转化为7-半琥珀酸酯(XXI),随后消除保护基团,以令人满意的收率得到XXIII。