Synthesis of novel chiral monophosphine ligands derived from isomannide and isosorbide. Application to enantioselective hydrogenation of olefins
作者:Houssein Ibrahim、Chloée Bournaud、Régis Guillot、Martial Toffano、Giang Vo-Thanh
DOI:10.1016/j.tetlet.2012.07.035
日期:2012.9
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 enantioselective hydrogenation of olefins giving good conversion and enantioselectivity up to 95% and 96% ee,
经由手性取代过程或涉及微波活化的氢磷酸化反应,从天然手性可再生资源1,4:3,6-二脱水己糖醇化合物制备了一类新的单膦配体。对这些配体进行了铑催化的烯烃对映选择性氢化的评估,分别可得到高达95%ee和96%ee的良好转化率和对映选择性。