Asymmetric [4+3] Cycloaddition of Hydroxyphenyl Indolinones to Synthesize Novel Spirooxindoles

The first asymmetric [4+3] cycloaddition of hydroxyphenyl indolinones has been reported to afford a new series of multisubstituted spirooxindole derivatives embedded with an oxadiazepine scaffold with high stereoselectivities. The reaction...