Two new stereochemically complementary oxindole synthesis
作者:Ian Fleming、Maria Antonietta Loreto、Joseph P. Michael、Ian H.M. Wallace
DOI:10.1016/s0040-4039(00)87259-7
日期:1982.1
Two routes have been developed for the conversion of ketones to oxindoles in the general sense (3 → 4); with norbornanone, the two routes gave different oxindoles (22 and 4).
New Spirocyclic Oxindole Synthesis Based on a Hetero Claisen Rearrangement
作者:Zhan Mao、Steven W. Baldwin
DOI:10.1021/ol0491888
日期:2004.7.1
see text] A newmethod for preparing spirocyclic oxindoles is presented. Featuring a [3,3]-sigmatropic enolate rearrangement, the three-step process converts carboxylicacid starting materials to oxidnole products in overall yields of 52-76%. The enolate rearrangement step occurs at -78 degrees C and provides easy access to oxindole products that have previously been difficult to prepare.