3-Chlorooxindoles: Versatile Starting Materials for Asymmetric Organocatalytic Synthesis of Spirooxindoles
作者:Artur Noole、Maksim Ošeka、Tõnis Pehk、Mario Öeren、Ivar Järving、Mark R. J. Elsegood、Andrei V. Malkov、Margus Lopp、Tõnis Kanger
DOI:10.1002/adsc.201300019
日期:2013.3.25
3‐Chlorooxoindoles have emerged as versatile precursors in the synthesis of spirocyclopropyl oxindoles. High enantio‐ and diastereoselectivity was attained under conditions of both iminium/enamine and H‐bonding catalysis.
Asymmetric Organocatalytic Synthesis of Spiro-cyclopropaneoxindoles
作者:Tõnis Kanger、Artur Noole、Andrei Malkov
DOI:10.1055/s-0033-1338505
日期:——
Straightforward cascade reactions for the synthesis of spiro-cyclopropaneoxindoles are described. The target compounds are obtained in high yields and in good enantio- and diastereoselectivities via hydrogen bonding or iminium catalysis.