By utilizing the dual reactivity function of N-aminopyridinium ylides, we develop direct [3 + 2]-cycloadditions of N-aminopyridinium ylides and ynals to build pyrazolo[1, 5-a]pyridines core while introducing a cyano group.... Click to show full abstract
By utilizing the dual reactivity function of N-aminopyridinium ylides, we develop direct [3 + 2]-cycloadditions of N-aminopyridinium ylides and ynals to build pyrazolo[1, 5-a]pyridines core while introducing a cyano group....
               
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