the 4-arylthioacetoacetic esters. Cyclization of these ketones was best accomplished when the free phenolic groups were masked by methoxymethyl groups. The benzo[b] thienylacetic esters were then converted to corresponding amides, reduced to tryptamine analogs, acetylated to melatonin analogs, and cyclized to harmaline analogs. N-Acetyltryptamine and 1-methylmelatonin were also synthesized for comparison
一系列5,6-二取代的苯并[ b ]
噻吩已被合成用于
生物学评估。这些包括类
色胺,
褪黑激素和harmaline类型的类似物,在5位和6位均具有羟基,甲氧基,甲氧基甲氧基或异
丙二烯二氧基。为了合成这些,制备适当的巯基
愈创木酚,并与
氯乙酰乙酸酯缩合为4-芳基
硫代
乙酰乙酸酯。当游离
酚基被甲氧基甲基掩盖时,这些酮的环化效果最佳。然后将苯并[ b ]
噻吩基
乙酸酯转化为相应的酰胺,还原为色
胺类似物,乙酰化为
褪黑激素类似物,并环化为harmaline类似物。ñ还合成了乙酰
色胺和1-甲基
褪黑激素以进行比较。报告了
褪黑激素类似物的初步
生物测定结果,该结果显示了活性。