Synthesis of indoles via alkylidenation of acyl hydrazides
作者:Kevin Hisler、Aurélien G.J. Commeureuc、Sheng-ze Zhou、John A. Murphy
DOI:10.1016/j.tetlet.2009.02.060
日期:2009.7
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
Anionic [3,3], [2,3] and [1,2] rearrangements of aliphatic and aromatic acyl hydrazines with NN bond cleavage
作者:Yasuyuki Endo、Takuya Uchida、Koichi Shudo
DOI:10.1016/s0040-4039(97)00320-1
日期:1997.3
N-Acyl-N′-phenylhydrazines rearrange under basic conditions to afford o-aminophenyl-acetamides. This reaction can be rationalized in terms of [3,3] sigmatropic shifts of enolized intermediates. The Sommelet-Hauser-type and Stevens-type rearrangements of both aromatic and aliphatic acylhydrazines compete with the [3,3] rearrangement.