开发了一种有效的光化学方法合成苯并[ e ]吡喃[3,2- g]吲哚。所提出的方法基于含有吡咯和异麦芽酚片段的四萘嵌苯的 6π-电环化。提出了增加所提出方法的区域选择性的各种选择,包括对异麦芽酚部分的化学修饰和使用阻止副过程的某些条件。该方法的优点是使用容易获得的起始材料、操作简单和易于分离目标产物,避免色谱纯化。证明了所考虑的异麦芽酚衍生物的光反应可用于光酸的产生。一种合成的光产物的结构是通过 X 射线衍射确定的。
Multicomponent
<i>one‐pot</i>
synthesis of novel imidazole‐2‐thione derivatives containing allomaltol fragment
作者:Andrey N. Komogortsev、Valeriya G. Melekhina、Boris V. Lichitsky、Mikhail E. Minyaev
DOI:10.1002/jhet.4222
日期:2021.3
A convenient method for the synthesis of novelimidazole‐2‐thione derivativescontaining allomaltol fragment was elaborated. This approach includes one‐pot multicomponent reaction of allomaltol, arylglyoxals, primary amines followed by addition of alkyl or aryl isothiocyanates. It was shown that the key intermediates of the studied process are substituted α‐aminoketones and the corresponding imidazolidine‐2‐thione