Benzo[<i>b</i>]thiophene derivatives. XXVII. 5-methoxy-6-halo-3-β-acetamidoethylbenzo[<i>b</i>]thiophenes, blocked analogs of melatonin
作者:E. Campaigne、Chung S. Kim
DOI:10.1002/jhet.5570200651
日期:1983.11
The preparation of the 6-fluoro and 6-chloro analogs of the title compound is described, in a seven-step synthesis giving 30-40% overall yields. All intermediates have been isolated and characterized, including important by-products, such as the corresponding benzo[b]thienyl-3-acetic acids, and 3-methylbenzo[b]thiophenes. Cyclization of the 3-halo-4-methoxyphenylthioacetoacetic esters gave more ortho-cyclization
描述了标题化合物的6-氟和6-氯类似物的制备,其以七步合成法给出了总产率的30-40%。所有中间体均已分离和表征,包括重要的副产物,例如相应的苯并[ b ]噻吩基-3-乙酸和3-甲基苯并[ b ]噻吩。3-卤代-4-甲氧基苯基硫代乙酰乙酸酯的环化在氯的情况下比氟衍生物观察到的邻环化更多。标题化合物显示出抗排卵作用较弱,氟类似物最活跃。