C-3 alkylation of oxindole with alcohols catalyzed by an indene-functionalized mesoporous iridium catalyst
作者:Guohua Liu、Tianzeng Huang、Yuli Zhang、Xiaohui Liang、Yunsheng Li、Hexing Li
DOI:10.1016/j.catcom.2010.12.021
日期:2011.3
A heterogeneous indene-based iridium catalyst with a highly ordered dimensional-hexagonal mesostructure was prepared through complexation of IrCI(3) with the indene-functionalized SBA-15 silica materials. During C-3 alkylation of oxindole with various alcohols, this heterogeneous catalyst exhibited highly catalytic activity (up to 93%). Such a catalyst could be recovered easily and used repetitively eight times without significantly affecting its catalytic activity. (C) 2010 Elsevier B.V. All rights reserved.
Towards Benign Synthesis of Indenes from Indanones: Zinc-Mediated Allylation of Ketones in Aqueous Media as a Source of Substituted Indenyl Ligand Precursors
Substituted indenes are valuable ligand precursors for transition-metal complexes. Previously, most of the methods employed for the preparation of alkyl-substituted indenes have involved the use of air-sensitive organometallic lithium or Grignardreagents, often in combination with expensive metal catalysts. The present work evaluates an approach to the synthesis of 2- and 3-allyl-substituted indenes