A new class of β-amino alcohol and diamine ligands was prepared from isosorbide as a chiral renewable resource. The original wedge-shaped structure of isosorbide offers an interesting chiral pocket to promote the metal-catalyzed enantioselective reduction of ketones by transferhydrogenation.
class of monophosphine ligands has been prepared from natural chirality renewable source, 1,4:3,6-dianhydrohexitol compounds, via a nucleophilic substitution process, or a hydrophosphination reaction involving microwave activation. These ligands have been evaluated for the rhodium-catalyzed enantioselectivehydrogenation of olefins giving good conversion and enantioselectivity up to 95% and 96% ee,
Chiral ionic liquids derived from isosorbide: synthesis, properties and applications in asymmetric synthesis
作者:Olivier Nguyen Van Buu、Audrey Aupoix、Nhung Doan Thi Hong、Giang Vo-Thanh
DOI:10.1039/b902956g
日期:——
A novel class of chiral ammonium and imidazolium-based ionic liquids has been designed and synthesized using isosorbide as a biorenewable substrate. These chiral ionic liquids were found to catalyze the aza Diels–Alder reaction to give good yields and moderate diastereoselectivitives.
Synthesis of novel chiral imidazolium-based ionic liquids derived from isosorbide and their applications in asymmetric aza Diels–Alder reaction
作者:Olivier Nguyen Van Buu、Audrey Aupoix、Giang Vo-Thanh
DOI:10.1016/j.tet.2009.01.055
日期:2009.3
A novel family of chiral imidazolium-based ionic liquids containing a Chiral moiety and a free hydroxyl function has been designed and synthesized using isosorbide as a biorenewable substrate. These chiral ionic liquids were found to catalyze the aza Diels-Alder reaction to give good yields and moderate diastereoselectivities. Chiral ionic liquids are recycled while their efficiency is preserved. (C) 2009 Elsevier Ltd. All rights reserved.