The room-temperature, ambient-pressure conversion of CO2 into value-added pharmaceutical products quinazoline-2,4(1H,3H)-diones

High conversion yields of quinazoline-2,4(1 H ,3 H )-diones (91.5–99.3%) can be achieved at room temperature and under ambient pressure using a [HDBU + ][3-Cl-PhO − ] ionic liquid catalyst.