New chiral ligands from isosorbide: application in asymmetric transfer hydrogenation
作者:Stéphane Guillarme、Thi Xuan Mai Nguyen、Christine Saluzzo
DOI:10.1016/j.tetasy.2008.05.033
日期:2008.6
Newchiral β-amino alcohols have been designed and synthesized from isosorbide, a by-product from the starch industry. These newligands have been synthesized in three steps from isosorbide in good yields and have been used in asymmetrictransferhydrogenation reaction with RuII complexes. One of these catalysts also demonstrated good catalytic activity and good enantioselectivity.
Starting from isosorbide and isomannide, two by-products from the starch industry, a family of chiral functionalized beta-aminoalcohols presenting a THF ring has been synthesized as potential ligands for hydrogen transfer reduction of prochiral ketones. Under optimal conditions, more than 70% ee with an excellent conversion were obtained for the HTR of the acetophenone. (C) 2010 Elsevier Ltd. All rights reserved.