Practical Synthesis of Chiral N-Heterocyclic Carbene Triazolium Salts Containing a Hydroxy Functional Handle
作者:Vasudevan Dhayalan、Kanchan Mal、Anat Milo
DOI:10.1055/s-0037-1611786
日期:2019.7
reactions in which the NHCs can serve as organocatalysts or ligands for organometallic catalysis. A library of functionalized chiral pyrrolidine-based N-heterocycliccarbene triazolium salts containing a hydroxy handle is prepared from readily accessible chiral (S)-pyroglutamic acid in eight steps. This improved synthetic protocol affords increased yields for known structures and 18 new NHCs are prepared by