Novel spiro and fused heterocycles from the allylation of indigo
作者:Mohammed K. Abdel-Hamid、John B. Bremner、Jonathan Coates、Paul A. Keller、Celia Miländer、Yasmine S. Torkamani、Brian W. Skelton、Allan H. White、Anthony C. Willis
DOI:10.1016/j.tetlet.2009.09.098
日期:2009.12
The allylation of indigo results in the one-stepsynthesis of two unique complex heterocyclic systems: a spiroindoline–pyridoindolone arising from the addition of three allyl moieties and a fused pyridoindolo-azepinoindolone generated from the addition and subsequent cyclisation of two allyl moieties. The structures of these novel heterocycles are assigned unambiguously using extensive NMR experiments