Concise Synthesis of 3-Acetoxy-N,N-dialkylbenzo[b]thiophene-2-carboxamides from 2-Ethylsulfanylbenzoates
作者:Kazuhiro Kobayashi、Yuuki Kanbe、Mai Horiuchi
DOI:10.1055/s-0030-1260220
日期:2011.11
developed in three steps from 2-ethylsulfanylbenzoates using an interrupted Pummerer reaction of N,N-dialkyl-3-(2-ethylsulfinylphenyl)-3-oxopropanamides. Thus, treatment of these sulfinyl amides, prepared by the reaction of 2-ethylsulfanylbenzoates with lithium enolates of N,N-dialkylacetamides followed by oxidation of the resulting N,N-dialkyl-3-(2-ethylsulfanylphenyl)-3-oxopropanamides with sodium
使用间断的N,N-二烷基-3-(2)的Pummerer反应从2-乙基硫基苯甲酸酯分三步开发了一种方便的合成3-乙酰氧基-N,N-二烷基苯并[ b ]噻吩-2-羧酰胺的方法-乙基亚磺酰基苯基)-3-氧代丙酰胺。因此,处理这些亚磺酰胺是通过使2-乙基硫烷基苯甲酸酯与N,N-二烷基乙酰胺的烯醇锂反应,然后将所得的N,N-二烷基-3-(2-乙基硫烷基苯基)-3-氧代丙烷酰胺氧化而制备的。 100°C下的偏高碘酸盐和乙酸酐导致所需苯并[ b]的形成]噻吩。 3-乙酰氧基苯并[ b ]噻吩-2-羧酰胺-2-乙基硫烷基苯甲酸酯-Pummerer反应中断-亚砜-乙酸酐