Bifunctional phase-transfer catalysts for synthesis of 2-oxazolidinones from isocyanates and epoxides
作者:Dong-Xiao Cui、Yue-Dan Li、Ping Huang、Zhuang Tian、Yan-Yan Jia、Ping-An Wang
DOI:10.1039/d0ra00693a
日期:——
A series of bifunctional phase-transfercatalysts (PTCs) were synthesized to catalyze the [3 + 2] coupling reaction of isocyanates and epoxides to afford 2-oxazolidinones in good to high yields (up to 92% yield) using PhCl as a solvent at 100 °C within 12 h. These bifunctional PTCs were easily prepared from commercially available tertiary-primary diamines and isocyanates (or isothiocyanates, mono-squaramides