In situ generated CF3CHN2 with 3-ylideneoxindoles to access CF3-containing pyrazolo[1,5-c]quinazolines derivatives

A protocol involving a DBU-promoted [3 + 2] cycloaddition/1,3-H shift/rearrangement/dehydrogenation cascade was developed, giving a series of CF 3 -containing pyrazole[1,5- c ]quinazolines in 35–86% yields.