synthesised via alkylidenation of acyl phenylhydrazides using phosphoranes and the Petasis reagent, followed by in situ thermal rearrangement of the product enehydrazines. The Petasis reagent provides an essentially neutral equivalent of the [acid-catalysed] Fischer indole synthesis, but with acyl phenylhydrazides as starting substrates. Alkylidene triphenylphosphoranes convert aroyl phenylhydrazides to indoles
吲哚是通过使用
磷烷和Petasis试剂对酰基苯基酰
肼进行烷基化,然后对产物烯
肼进行原位热重排而合成的。Petasis试剂可提供[酸催化]的Fischer
吲哚合成的基本中性当量,但以酰基苯基酰
肼为起始底物。亚炔基
三苯基膦将芳酰基苯基酰
肼转化为
吲哚,但是衍生自脂族
羧酸的酰基苯基酰
肼经过Brunner反应形成
吲哚-2-酮。