Efficient reductive Claisen rearrangement of prop-2'-enyloxyanthraquinones and 2'-chloroprop-2'-enyloxyanthraquinones with iron powder in ionic liquids
作者:Nadali, Samaneh、Khoshroo, Ali、Aghapour, Ghasem
DOI:10.3906/kim-1711-49
日期:——
A rapid and selective iron-mediated reductive Claisen rearrangement of various prop-2'-enyloxyanthraquinones and 2'-chloroprop-2'-enyloxyanthraquinones to 1-hydroxy-2-(prop-2'-enyl)anthraquinones and anthrafurandiones is presented. All reactions are carried out in a mixture of ionic liquids, [Bzmim]Cl (1-benzyl-3-methylimidazolium chloride) and [Hmim]BF$_4}$ (1-methylimidazolium tetrafluoroborate), in short reaction times (5-35 min). Our study showed that 1-(prop-2'-enyloxy)anthraquinone is more active than 1-(2'-chloroprop-2'-enyloxy)anthraquinone to perform this rearrangement.
本研究介绍了铁介导的各种丙-2'-烯氧基蒽醌和 2'-氯丙-2'-烯氧基蒽醌到 1-羟基-2-(丙-2'-烯基)蒽醌和蒽呋喃酮的快速和选择性还原性克莱森重排反应。 所有反应均在离子液体[Bzmim]Cl(1-苄基-3-甲基咪唑氯化物)和[Hmim]BF$_4}$(1-甲基咪唑四氟硼酸盐)的混合物中进行,反应时间短(5-35 分钟)。我们的研究表明,1-(丙-2'-烯氧基)蒽醌比 1-(2'-氯丙-2'-烯氧基)蒽醌在进行这种重排反应时更为活跃。