the Vilsmeier reagent was investigated. The reaction proceeds with acid-catalysed dehydration to afford sulphur substituted 1,3-butadienes, which undergo subsequent iminoalkylations. The intermediate iminium salts formed were successfully transformed into 2-methylsulfanyl substituted 4-aryl pyridines, in the presence of ammonium acetate
研究了由甲基
格氏试剂与α-氧代烯二
硫缩醛的1,2-加成反应产生的α-羟基烯酮二
硫缩醛与Vilsmeier试剂的反应。反应通过酸催化的脱
水进行,得到
硫取代的
1,3-丁二烯,其随后进行亚
氨基烷基化。在
乙酸铵存在下,将形成的中间体
亚胺盐成功转化为2-甲基
硫烷基取代的4-芳基
吡啶