This work reports cascade cyclization between 1allenyl-2-alkynylbenzenes and nitrosoarenes. When these two components reacted alone under N 2 , N,O-functionalized indanefused isoxazolidines 3 were obtained selectively. DFT calculations verify that this reaction sequence involves unprecedented nitrone/ alkyne cycloadditions, followed by diradical rearrangement.
The bi-fluorophoric host–guest [2]pseudorotaxane polymer containing merocyanine-based guest (open form) showed sensitive cyanide detections and useful bio-imaging applications in living cells via FRET-OFF processes to recover green donor emissions.
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